JP2014235950A - Operation mechanism for vacuum switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation mechanism for a vacuum switch, in which components in the operation mechanism supporting and fixing an opening spring have simple structure so that the number of the components can be reduced.SOLUTION: An operation mechanism for a vacuum switch comprises: an operation axis 4 connected to a movable side of a vacuum valve; a conversion lever 6, an intermediate part of which is connected to the operation axis 4, and one end of which is rotatably fixed on a main axis 8; a movable pin 10 fixed on the other end of the conversion lever 6; a U-shaped movable side support 20, both side faces of which have the movable pin 10 penetrating thereinto; a spring support column 21 having an opening part 22 from an intermediate part thereof to one end so that the movable pin 10 can move freely, and penetrating a bottom face of the U-shaped movable side support 20; a fixed side support 23 on which the other end of the spring support column 21 is fixed; and an opening spring 15 supported between the fixed side support 23 and the movable side support 20, and provided at an outer peripheral part of the spring support column 21.

Description

  Embodiments of the present invention relate to an operation mechanism of a vacuum switch using an operation spring.

  2. Description of the Related Art Conventionally, an operation spring is used for an operation mechanism of a vacuum switch such as a vacuum circuit breaker in which a vacuum valve is molded with an epoxy resin or a vacuum disconnect switch, and the opening / closing operation is performed (for example, see Patent Document 1). ).

  This type of vacuum switch is shown in FIG. 5, and the vacuum switch has a main circuit portion 1 a, a ground insulating portion 1 b, and an operation mechanism portion 1 c arranged linearly in the illustrated horizontal direction. . The main circuit unit 1a is provided with a vacuum valve 2 for opening and closing the main circuit. An insulating operation rod 3 connected to the movable shaft of the vacuum valve 2 is provided in the ground insulating portion 1b.

  Next, the operation mechanism 1c will be described with reference to FIG. 6A of the side view and FIG.

  The operation mechanism portion 1c is provided with an operation shaft 4 connected to the insulating operation rod 3, and movably penetrates the opening hole of the gantry 5. The gantry 5 serves as a member constituting the casing of the operation mechanism. At the end of the operation shaft 4, an intermediate portion of the conversion lever 6 that changes the moving direction is fixed by a rotatable movable pin 7. A main shaft 8 is fixed to one end of the conversion lever 6 so that the conversion lever 6 is rotatable. At the other end, a connecting block 9 is fixed by a rotatable movable pin 10. In the axial direction of the connecting block 9, a dimension adjusting shaft 12 that finely adjusts the size using a nut 11, a spring support shaft 13, and a columnar shape in which the spring support shaft 13 is movably penetrated and locked to the gantry 5. Fixed side supports 14 are connected and fixed, respectively. An open spring 15 is provided on the outer periphery of the spring support shaft 13. The open spring 15 is sandwiched between a movable side spring receiver 16 on the dimension adjusting shaft 12 side and a fixed side spring receiver 17 on the fixed side support 14 side.

  6 shows a closed circuit state, and when an open circuit signal is input, the conversion lever 6 is rotated counterclockwise by the spring force of the open circuit spring 15 with the spindle 8 as a fulcrum. At the same time, the operating shaft 4 moves to the left in the figure, and the vacuum valve 2 is opened.

  In these configurations, the movable parts such as the connecting block 9, the dimension adjusting shaft 12, the spring support shaft 13, the fixed side support 14, and the spring receivers 16 and 17 are combined and integrated so that dimensional accuracy is required. It is manufactured. Machining is effective for setup and processing time in small lot production. However, when the number of production increases, it takes a lot of processing time and it becomes difficult to shorten the lead time. In addition, the number of parts is large, and the assembly time is enormous. For this reason, the thing which makes the structure which supports and fixes the open circuit spring 15 simple and can improve productivity was desired.

JP 2003-333715 A

  The problem to be solved by the present invention is to provide an operation mechanism of a vacuum switch that can reduce the number of parts and improve productivity by simplifying the parts that support and fix the open spring 15. .

  In order to solve the above problems, the operation mechanism of the vacuum switch according to the embodiment is connected to the movable side of the vacuum valve, and the operation shaft that movably penetrates the gantry and the operation shaft is connected to the intermediate portion. And a conversion lever having one end rotatably fixed to the main shaft, a movable pin rotatably fixed to the other end of the conversion lever, and a U-shaped movable side in which the movable pin penetrates both side surfaces. A support and an opening through which the movable pin is movably moved are provided from an intermediate portion to one end, a spring support column penetrating the U-shaped bottom surface of the movable side support, and the other end of the spring support column A fixed side support fixed to the gantry, and an open spring provided between the fixed side support and the movable side support and provided on the outer periphery of the spring support column. And features.

The figure which shows the structure of the operation mechanism of the vacuum switch which concerns on Example 1 of this invention. The exploded view which shows the structure of the spring support pillar which concerns on Example 1 of this invention. The exploded view which shows the structure of the spring support pillar which concerns on Example 2 of this invention. The exploded view which shows the structure of the spring support pillar which concerns on Example 3 of this invention. The side view which shows the structure of a vacuum switch. The figure which shows the structure of the operation mechanism of the conventional vacuum switch.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the operation mechanism of the vacuum switch according to the first embodiment of the present invention will be described with reference to FIGS. 1A and 1B are diagrams showing a configuration of an operation mechanism of a vacuum switch according to Embodiment 1 of the present invention, where FIG. 1A is a side view, FIG. 1B is a top view, and FIG. 2 is Embodiment 1 of the present invention. It is an exploded view which shows the structure of the spring support pillar which concerns on. In addition, the same code | symbol was attached | subjected to the component similar to the past. Moreover, since the vacuum switch is the same as the conventional one, the description thereof is omitted.

  As shown in FIG. 1, the operation shaft 4 is movably penetrated through the opening hole of the gantry 5, and an intermediate portion of the conversion lever 6 that changes the moving direction is fixed to the end portion thereof by a rotatable movable pin 7. Yes. A main shaft 8 is fixed to one end of the conversion lever 6 so that the conversion lever 6 is rotatable. At the other end, the movable pin 10 passes through both side surfaces of the movable side support 20 bent in a U shape, and is fixed rotatably. A hollow spring support column 21 having a square cross section is movably penetrating through an opening provided on the U-shaped bottom surface of the movable support 20.

  U-shaped openings 22 are provided on both side surfaces of the spring support column 21 from the intermediate portion to one end so that the movable pin 10 can move freely. The movable pin 10 has an outer peripheral surface that moves parallel to the axial direction. The other end of the spring support column 21 is fitted into a hollow, square-shaped fixed-side support 23 and fixed by a fixing pin 24. The fixed side support 23 is fixed to the gantry 5. An open spring 15 is provided around the spring support column 21 and is sandwiched between the bottom of the movable support 20 and the end surface of the fixed support 23.

  Next, the spring support column 21 will be described with reference to FIG.

  As shown in FIG. 2, the spring support column 21 is divided into two in the axial direction, and the first spring support plate 25a and the second spring support plate 25b obtained by bending the steel plate into a U-shape are spot welded or the like. Assembled. The first spring support plate 25a and the second spring support plate 25b include first and second U-shaped openings 26a and 26b corresponding to the opening 22 and first and second through which the fixing pin 24 penetrates. Second through holes 27a and 27b are provided. The openings 26a and 26b, the through holes 27a and 27b, and the U-shaped bend can be manufactured by pressing or the like, and are suitable for mass production. The spring support column 21 may be circular in cross section or polygonal, and is assembled into a plurality of parts.

  FIG. 1 shows a closed state, and when an opening signal is input, the conversion lever 6 is rotated counterclockwise by the spring force of the opening spring 15 with the main shaft 8 as a fulcrum. At the same time, the movable pin 10 moves through the opening 22 in the left direction in the figure, and accordingly, the operation shaft 4 also moves in the left direction in the figure, thereby opening the vacuum valve.

  According to the operation mechanism of the vacuum switch of the first embodiment, the open spring 15 can be supported and fixed by the movable side support 20, the fixed side support 23, and the spring support column 21, so that the number of parts can be reduced. . Further, the spring support column 21 can be manufactured by combining the first spring support plate 25a and the second spring support plate 25b, and productivity can be improved with a simple configuration.

  Next, the operation mechanism of the vacuum switch according to the second embodiment of the present invention will be described with reference to FIG. FIG. 3 is an exploded view showing the configuration of the spring support pillar according to the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is a divided shape. In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the spring support column 21 is assembled by combining a first spring support plate 25a and a second spring support plate 25b bent in an L shape. The first spring support plate 25a and the second spring support plate 25b are respectively provided with first and second openings 26a and 26b that are opened in an L shape.

  According to the operation mechanism of the vacuum switch of the second embodiment, the same effect as that of the first embodiment can be obtained.

  Next, the operation mechanism of the vacuum switch according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 4 is an exploded view showing the configuration of the spring support column according to the third embodiment of the present invention. The difference between the third embodiment and the second embodiment is a combined shape. In FIG. 4, the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, the spring support column 21 is assembled by combining a first spring support plate 25a and a second spring support plate 25b bent in an L shape. Convex recesses 28a and 28b are provided at the end portions of the first spring support plate 25a and the second spring support plate 25b so that they are fitted into each other.

  According to the operation mechanism of the vacuum switch of the third embodiment, in addition to the same effects as those of the second embodiment, the combination can be facilitated.

  According to the embodiment as described above, the support and fixing of the open circuit spring can be made simple and productivity can be improved.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1a Main circuit part 1b Ground insulation part 1c Operation mechanism part 2 Vacuum valve 3 Insulation operation rod 4 Operation shaft 5 Base 6 Conversion lever 15 Opening spring 20 Movable side support 21 Spring support pillar 22, 26a, 26b Opening part 23 Fixed side support 25a, 25b Spring support plate 28a, 28b Convex recess

Claims (5)

An operating shaft connected to the movable side of the vacuum valve and movably penetrating the mount;
The operation shaft is connected to the intermediate portion, and a conversion lever having one end rotatably fixed to the main shaft;
A movable pin rotatably fixed to the other end of the conversion lever;
A U-shaped movable side support in which the movable pin penetrates both side surfaces;
A spring support column penetrating through a U-shaped bottom surface of the movable side support, while providing an opening from which the movable pin is movably movable from an intermediate part to one end;
The other end of the spring support column is fixed, and a fixed side support fixed to the gantry,
An open spring provided between the fixed support and the movable support and provided on the outer periphery of the spring support column;
An operation mechanism of a vacuum switch characterized by comprising:   The operation mechanism of the vacuum switch according to claim 1, wherein the spring support column has a hollow quadrangular shape.   The operating mechanism of the vacuum switch according to claim 2, wherein the spring support pillar is divided into two in the axial direction and combined with a steel plate bent in a U-shape.   The operating mechanism of the vacuum switch according to claim 2, wherein the spring support pillar is divided into two in the axial direction and a steel plate bent in an L shape is combined.   The operating mechanism of the vacuum switch according to claim 2, wherein the spring support column is divided into two in the axial direction, and a steel plate that is bent into an L shape by providing a convex recess at the end is combined.

Images