JP5916339B2 - Switch operating mechanism unit - Google Patents

Description

  The present invention relates to an operation mechanism unit in a switch in which an opening / closing part and an operation mechanism are unitized.

  In a manually operated type cased switch used for section switching in a high-voltage distribution line, an opening / closing part composed of a movable electrode, a fixed electrode and an arc extinguishing device is incorporated in a metallic case, and the opening / closing part In general, an operation mechanism for opening and closing the switch is incorporated in the case, and the opening and closing shaft of the switch and the operation mechanism output shaft are connected last (see, for example, Patent Document 1 and Patent Document 2).

Japanese Utility Model Publication No. 8-595 Japanese Utility Model Publication No. 53-18571

  By the way, the above-mentioned conventional operation mechanism is a structure in which each component constituting the operation mechanism is directly assembled in a limited narrow space in the case, that is, the case side wall.

  For this reason, the work in this limited space is difficult to use because the tools are difficult to use and difficult to check. In addition, fine adjustment is difficult even when adjusting the operation mechanism after assembly, and it is the same when removing or reattaching a part once assembled. Further, when connecting the opening / closing shaft and the output shaft of the operation mechanism, there is a problem that it is difficult to perform the connecting work because there is no adjustment device.

  The present invention is proposed in order to solve these problems, and an object thereof is to provide an operation mechanism unit for a switch capable of simplifying the assembly work of the switch.

  In order to solve the above problems, the present invention forms a switch together with a separately-assembled switch unit that inserts and removes the movable electrode with respect to the fixed electrode, and elastically acts on the compression spring by the rotation of the handle shaft. A force storage mechanism that stores force and outputs the elastic force at a predetermined timing; and a link mechanism that transmits the elastic force from the force storage mechanism to the movable electrode and inserts and removes the movable electrode with respect to the fixed electrode. An operation mechanism unit for a switch assembled on a pedestal having a shape, wherein the link mechanism is supported by the pedestal so as to be rotatable about a rotation axis perpendicular to the handle shaft, and is rotated by a force transmitted from the energy storage mechanism. A connecting rod provided with a play having a margin in the longitudinal direction at the connecting portion with the output end side. Characterized by comprising a.

  In addition, the invention of the present application is configured by assembling a fixed electrode and a movable electrode in a substantially box-shaped resin case, together with a separately assembled opening / closing part unit that inserts and removes the movable electrode with respect to the fixed electrode to turn on / off the electric circuit Constituting a switch, storing an elastic force in a compression spring by rotating a handle shaft, and outputting the elastic force at a predetermined timing; and transmitting the elastic force from the force storage mechanism to the movable electrode, A switch operating mechanism unit in which a link mechanism for inserting / removing a movable electrode with respect to a fixed electrode is assembled to a pedestal having a predetermined shape, and the link mechanism is rotatable on a rotation axis perpendicular to the handle shaft. A main shaft that is rotated by a force transmitted from the power storage mechanism, an output end of an elastic force in the power storage mechanism, and a variable-length rod that connects the main shaft; A unit assembling method for assembling an operating mechanism unit for a switch having a connecting rod provided with play having a tolerance in a longitudinal direction in the connecting portion, and fixing the pedestal to the resin case. The main shaft is connected to the movable electrode, the movable range of the movable electrode is determined by adjusting the rotation angle of the main shaft, the output end of the elastic force in the power storage mechanism and the main shaft are connected by the connecting rod, The output timing of the elastic force is determined by adjusting the length of the connecting rod, and the length of the connecting rod is fixed.

  In the switch operating mechanism unit according to the present invention, an operating mechanism is separately assembled outside the metal case as a unit, and the main shaft (connected to the movable electrode) and the power storage mechanism are connected. Gave her tolerance. As a result, it is not necessary to assemble the operating mechanism directly to the metal case in a narrow space, and it can be fine-tuned according to the connection between the main shaft and the power storage mechanism, making it easy to assemble the switch. it can.

FIG. 1 is a plan view of the operating mechanism unit according to the first embodiment when the operation mechanism unit is turned on. FIG. 2 is a perspective view of the operation mechanism unit according to the first embodiment when the operation mechanism unit is loaded. FIG. 3 is a plan view of the operation mechanism unit according to the first embodiment when the operation mechanism unit is opened. FIG. 4 is a diagram showing the configuration of the connecting rod. FIG. 5 is a flowchart showing the procedure for assembling the units. FIG. 6 is a cross-sectional view of the opening / closing unit according to the first embodiment. FIG. 7 is a cross-sectional view when the resin case of the opening / closing unit is fixed to the pedestal. FIG. 8 is a cross-sectional view when adjusting the movable range of the movable electrode.

  Embodiments of an operation mechanism unit according to Embodiment 1 will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of the operation mechanism unit according to the first embodiment when the operation mechanism unit is loaded, and FIG. 2 is a perspective view when the operation mechanism unit according to the first embodiment is loaded. See FIG. 1 and FIG. 2 for the following description.

  As shown in FIGS. 1 and 2, the operation mechanism unit 100 includes a main shaft 10, a handle shaft 20, a first base 30a, a second base 30b, a connecting rod 40, a pedestal 50, and a power compression spring. 60 and an initial motion control compression spring 65.

  The main shaft 10 is rotatably supported by the side surfaces 52 and 53 of the base 50. On the main shaft 10, levers 11a to 11c are arranged at substantially equal intervals. The main shaft 10 has a connecting rod fixing portion 12, a connecting rod 40 described later is connected to the connecting rod fixing portion 12, and rotates by receiving a force from the connecting rod 40. Lever 11a-11c is connected with the movable electrode (refer movable electrode 220 of FIG. 6) of an opening-and-closing part unit via a link (refer link 340 of FIG. 8). Since the levers 11a to 11c rotate together with the main shaft 10, the rotational movement is transmitted to the movable electrode via the link, and the movable electrode is opened and closed.

  The handle shaft 20 is supported near the center of the bottom surface 51 of the base 50 so as to be perpendicular to the bottom surface 51 and to be rotatable. The handle shaft 20 can be operated by connecting a dedicated handle to its tip.

  The first base 30a is a pair of two members having a predetermined shape on the front and back planes and spaced apart by spacer pins 32a and 33a, and has a protrusion 31a. The first base 30a passes the handle shaft 20 through a hole provided at a predetermined position, passes the spacer pin 33a through a guide 61 of a power compression spring 60 described later, and the spacer pin 32a through a long hole 31b of the second base 30b. The protrusion 31a is attached through a long hole 41 of the connecting rod 40 described later. Unlike the second base 30b, the first base 30a is independent of the handle shaft 20, and does not accompany the rotation of the handle shaft 20.

  First, the operation from insertion to release (rotation counterclockwise in FIG. 1) will be described. The first base 30a pushes the spacer pin 32a into the long hole 31b of the second base 30b rotated with the rotation of the handle shaft 20. Began to rotate. At that time, the protrusion 31a moves from one end 41a of the long hole 41 of the connecting rod 40 toward the other end 41b (in FIG. 1, from the bottom to the top of the page), and at the same time as the movement of the protrusion 31a, the power compression spring It is gradually compressed until 60 reaches the dead point D1.

  Then, when the power compression spring 60 exceeds the dead point D1, the first base 30a is rotated at once by receiving the elastic force that the power compression spring 60 tries to return to the original position by the spacer pin 33a. At this time, the protrusion 31a collides with the other end 41b of the long hole 41 of the connecting rod 40 and pushes the base connecting portion 43 with force, so that the elastic force of the power compression spring 60 is transmitted to the connecting rod 40 and the main shaft 10 is It rotates and becomes an open state (refer FIG. 3). Note that the operation from opening to closing (clockwise rotation in FIG. 3) is omitted because the operation of each part is the same except that the rotation direction is changed.

  The second base 30b is a single member having a predetermined shape on the front and back planes, and has a long hole 31b. In the second base 30b, the handle shaft 20 is passed through a hole provided at a predetermined position, and a pin 32b of the second base 30b is rotatably fixed to a guide 66 of an initial motion control compression spring 65 described later, and is a long hole. 31b is passed through the spacer pin 33a of the first base 30a.

  Unlike the first base 30 a, the second base 30 b is fixed to the handle shaft 20, and thus is integrated with the handle shaft 20 and interlocks with the rotation of the handle shaft 20. Therefore, when the operator rotates the handle shaft 20, the second base 30b also rotates, and eventually the end of the long hole 31b hits the spacer pin 32a of the first base 30a. The first base 30a starts to rotate when the spacer pin 32a is pushed by the end of the long hole 31a. If the operator stops turning the handle shaft 20 halfway (a position not exceeding the dead point D2 of the initial motion control compression spring 65), the handle returns to the initial position by the elastic force of the initial motion control compression spring 65.

  The connecting rod 40 is a rod that connects the main shaft 10 and the first base 30a, and has a long hole 41 at one end. Specifically, as shown in FIG. 4, the connecting rod 40 includes a main shaft connecting portion 42, a base connecting portion 43, an adjusting rod 44, a fixing nut 45, and a spring washer 46. The adjustment rod 44 is provided with threaded portions at both ends, opposite to each other, and the main shaft coupling portion 42 and the base coupling portion 43 are provided with screw hole portions 42 a and 43 a corresponding to the screw portions of the adjustment rod 44. Accordingly, the main shaft connecting portion 42, the base connecting portion 43, and the adjusting rod 44 have a function of a turnbuckle and can be adjusted in length.

  A long hole 41 is formed in the base connecting portion 43. In the long hole 41, the projection 31a in the long hole 41 hits both ends 41a and 41b, and a collision occurs. Accordingly, a force is transmitted to the connecting portion of the connecting rod 40 with the main shaft 10. Rotation occurs.

  The pedestal 50 has a substantially U-shaped cross section composed of a bottom surface 51, a side surface 52, and a side surface 53 by bending both edges of a metal flat plate. The pedestal 50 has holes 54a to 54c through which links connecting the levers 11a to 11c and the movable electrodes are passed. In addition, in order to fix to an opening-and-closing part unit, the hole for letting a screw and a bolt pass is also shape | molded in the predetermined position.

  The pedestal 50 supports the main shaft 10 so as to be rotatable near the center of the bottom surface 51 and the side shaft 52 and the side surface 53. The vertical relationship between the main shaft 10 and the handle shaft 20 is maintained by such a fixed positional relationship between the two shafts in the pedestal 50. Further, the movable electrode of the opening / closing section unit to which the force is transmitted from the main shaft 10 has a rotation axis parallel to the rotation axis of the main shaft 10. Therefore, the rotation axis of the movable electrode and the handle axis can be in a vertical relationship.

  The power compression spring 60 passes the guide 61 through the inside cavity, and fixes one end of the guide 61 to the spacer pin 33a of the first base 30a and the other end to the pedestal 50, so that the fixing point of the pedestal 50 is a rotation axis. Rotate while being compressed. The guide 61 is configured such that a rod having a small diameter is inserted into a pipe having a large diameter and can be expanded and contracted.

  The initial movement control compression spring 65 passes the guide 66 through the inside cavity, and fixes one end of the guide 66 to the pin 32b of the second base 30b and the other end to the pedestal 50, thereby setting the fixing point of the pedestal 50 as the rotation axis. It rotates while being compressed. As with the guide 61, the guide 66 can be expanded and contracted by inserting a small diameter rod into a large diameter pipe.

  Next, a procedure for assembling the operation mechanism unit 100 to the opening / closing unit will be described. First, the configuration of the opening / closing unit will be described with reference to FIG. FIG. 5 is a cross-sectional view of the opening / closing unit according to the first embodiment.

  As shown in FIG. 5, the opening / closing unit 200 is provided for each of the three-phase alternating current phases, and is constructed by assembling the movable electrode 220 and the fixed electrode 230 on a substantially box-shaped resin case 210. is there. The movable electrode 220 rotates about the rotation shaft 221 and is inserted into and removed from the fixed electrode 230, and the electric circuit is turned on and off. Since the electric circuit is a three-phase alternating current, and the switching unit 200 is assigned for each phase as described above, the switching unit 200 for three phases is assembled to the operation mechanism unit 100. become.

  One operation mechanism unit 100 and the switching unit 200 for three phases are assembled independently, and assembled in the procedure described below to complete as a switch. FIG. 6 is a flowchart showing the procedure for assembling the units.

  As shown in FIG. 6, first, the resin case 210 of the opening / closing unit 200 is fixed to the base 50 of the operation mechanism unit 100 (step S110). Specifically, as shown in FIG. 7, a predetermined position on the pedestal 50 is provided with a hole 310 for allowing a bolt to pass therethrough, and a predetermined position on the resin case 210 is provided with a screw hole corresponding to the screw portion of the bolt. 320 is provided. Then, the resin case 210 is fixed to the pedestal 50 using the bolts 330.

  Next, the levers 11a to 11c and the movable electrode 220 are connected by a link (step S120). Specifically, as shown in FIG. 8, a link 340 is used to connect the connecting portion 350 of the lever 11a and the connecting portion 360 of the movable electrode 220 using a dedicated pin or the like.

  Next, the movable range of the movable electrode 220 is adjusted (step S130). Specifically, as shown in FIG. 8, the base 50 is provided with a stopper 370, and the levers 11 a to 11 c collide with the stopper 370 and the main shaft 10 does not rotate any more. Adjust the rotation angle. Since the rotation angle of the main shaft 10 directly corresponds to the rotation angle of the movable electrode 220, the depth of insertion of the movable electrode 220 into the fixed electrode 230 and the opening completion position can be determined by adjusting the height of the stopper 370. .

  Next, the main shaft 10 and the first base 30a are connected by the connecting rod 40 (step S140). Specifically, the protrusion 31a of the first base 30a is connected by being inserted into the elongated hole 41 in the base connecting portion 43 of the connecting rod 40, and the connecting rod fixing portion 12 of the main shaft 10 and the main shaft connecting portion 42 of the connecting rod 40 are dedicated. Connect using the pins.

  Next, the adjusting rod 44 is turned to change the length of the connecting rod 40, and the output timing of the elastic force is adjusted (step S150). As described above, when the handle shaft 20 is rotated, the power compression spring 60 is compressed, and the protrusion 31a moves from one end 41a of the long hole 41 of the connecting rod 40 toward the other end. However, if the power compression spring 60 exceeds the dead point D1 before moving to the other end 41b, the energy of the collision increases, and the walls of the protrusion 31a and the long hole 41 may be damaged.

  Therefore, it is desirable that the collision between the protrusion 31a and the long hole 41 occurs before and after contact. Therefore, by changing the length of the connecting rod 40, the timing when the power compression spring 60 exceeds the dead point D1 is matched with the timing when the projection 31a finishes moving from the one end 41a to the other end 41b.

  Finally, the fixing nut 45 is tightened to fix the length of the connecting rod 40 (step S160). By tightening the fixing nut 45, the spring washer 46 is compressed and repelled, so that friction occurs between the screw hole portion of the fixing nut 45 and the screw portion of the adjusting rod 44, and the fixing nut 45 does not move. Thereby, the assembly of the operation mechanism unit 100 and the opening / closing unit 200 is completed.

  As described above, in the first embodiment, a connecting rod having a variable length function is used to connect the link mechanism and the energy storage mechanism, as in the case of the turnbuckle. Therefore, fine adjustment is performed by adjusting the long hole and the length of the connecting rod. It can be performed. In addition, an operation mechanism can be separately assembled as a unit outside the metal case. Therefore, the assembling work of the switch can be easily performed as compared with the case where the operation mechanism is directly attached to the metal case in a narrow space.

  The operation mechanism unit according to the present invention is useful when assembling the switch, and in particular, fine adjustment after assembly (for example, the rotation angle of the movable electrode) and assembly of the operation mechanism outside the metal case. It has the effect that it can be performed.

DESCRIPTION OF SYMBOLS 10 Main shaft 20 Handle shaft 30a 1st base 31a Protrusion 32a Long hole 30b 2nd base 31b Long hole 40 Connecting rod 50 Base 60 Power compression spring 65 Initial control compression spring 100 Operation mechanism unit 200 Opening / closing part unit 210 Resin case 220 Movable electrode 230 Fixed electrode

Claims (1)

A switch is configured with a separately assembled switch unit that inserts and removes the movable electrode with respect to the fixed electrode, and stores the elastic force in the compression spring by rotating the handle shaft, and the elastic force is applied at a predetermined timing. A switch operating mechanism unit that is assembled to a pedestal having a predetermined shape, and a link mechanism that transmits the elastic force from the power storage mechanism to the movable electrode and inserts and removes the movable electrode from the fixed electrode. There,
The link mechanism is
A main shaft that is supported by the pedestal so as to be rotatable on a rotation axis perpendicular to the handle shaft, and that rotates with a force transmitted from the force accumulation mechanism;
A first connecting portion having a long hole extending in the longitudinal direction and connected to an output end of an elastic force in the power storage mechanism; a second connecting portion connected to the main shaft; An adjustment portion that is provided with screws cut in opposite directions to each other and fastened to the first and second connecting portions by the screws, two fixing nuts that fit into the thread cuts at both ends of the adjustment portion, and A connecting rod comprising two spring washers disposed between the fixing nut and the first and second connecting portions, and an output end of an elastic force in the power storage mechanism is a length of the first connecting portion. An operating mechanism unit for a switch, wherein the timing of hitting the hole is adjusted by turning the adjusting portion of the connecting rod, and then the fixing nut is tightened to fix the length of the connecting rod .

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