JPH052346U - Transmission path guide mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] Low cost vacuum circuit breakers, lighter moving parts,
The external dimensions are reduced and a highly reliable circuit breaker is obtained. [Structure] A wipe rod 5 driven forward and backward, a fork-shaped wipe link 9 provided so as to slide in the longitudinal direction of this member, and pins 10a, 10 on the fork-shaped portion of the wipe link.
an insulating rod 12 fixed via b, a contact pressure spring 7 for urging the wipe link forward (on the insulating rod side), fixed to the front end of the wipe rod 5, and having a long length in the longitudinal direction of each member. It has a hole 11a and a guide 11 that engages with the pin in this elongated hole.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a guide mechanism for preventing bending of an operation force transmission path in a vacuum circuit breaker.

[0002]

[Prior Art]

 FIG. 5 shows a closed state of a conventional vacuum circuit breaker. In the figure, 1 is a vacuum switch tube, 1a is a fixed contact of the vacuum switch tube, 1b is a movable contact of the vacuum switch tube, and 2 is rotatably arranged. A shaft 3 is a lever fixed to the shaft 2 about the shaft 2 as a rotation center, 4 is a pin connecting the wipe rod 5 and the lever 3, and 5 is a wipe rod in which a bolt 8 is screwed with a round washer 17 interposed therebetween. 6 is a round washer which receives the contact pressure spring 7, 7 is a contact pressure spring which is arranged to be expandable and contractable between the round washer 6 and the wipe link 16 using the wipe rod 5 as a guide, 8 is a bolt, 10a and 10b are Insulation Rod 12 that penetrates the rod 12 and the wipe link 16 to fix them, 12 is an insulation rod that connects the pin 13 and the wipe link 16, and pins 10a and 10b to electrically insulate, 13 is an insulation A pin that rotatably connects the head 12 and the link 15, a pin 14 that serves as the center of rotation of the link 15, a 15 link that uses the pin 14 as the center of rotation, and a 16 that slides on the cylindrical shaft of the wipe rod 5. A wipe link which is movably arranged and fixed to the insulating rod 12 by pins 10a and 10b, A is a line connecting the pins 4 and 13, W is a contact pressure dimension, T is the thickness of the wipe link 16, and H is H. The gap between the wipe rod 5 and the wipe link 16 is shown. 6 shows an open state of the vacuum circuit breaker, FIG. 7 is a detailed view of the transmission path of FIG. 5, FIG. 4 is a part view of the wipe rod of the transmission path, and FIG. 8 is a case where the thickness U of the wipe link 11 is thin. The transmission path is bent. B shows a center line in a state of being bent downward as shown in the figure, C shows a center line in a state of being bent upward (not shown), and G shows a gap between the wipe rod 5 and the wipe link 11.

Next, the operation will be described. FIG. 6 shows the vacuum circuit breaker in an open state. In order to close the vacuum circuit breaker as shown in Fig. 5, the shaft 2 is rotated counterclockwise, the insulating rod 12 is pushed by the lever 3, and the link 15 is rotated about the pin 14 as the center of rotation. The movable contact 1b of the vacuum switch tube is pushed upward by rotating in the metering direction to bring the fixed contact 1a and the movable contact 1b into contact with each other to close the vacuum circuit breaker. Further, in order to apply contact pressure to the contact, the shaft 2 is further rotated and the contact pressure spring 7 is compressed by the contact pressure dimension W 1. At this time, as shown in FIG. 8, when the thickness U of the wipe link 11 is thin, the line A is subjected to a compressive force and tends to bend like the line B or the line C in the vertical direction in the figure. However, in FIGS. 5 and 6 of the related art, as shown in FIG. 7, the thickness T 1 of the wipe link 16 is made sufficiently thick and the gap H between the wipe rod 5 and the wipe link 16 is made small so that it does not bend. However, for this reason, the movable portion is heavier by the thickness T, and the outer dimension becomes larger. Since the gap H is made small, when the vacuum circuit breaker is opened or closed, the material powder comes out by the sliding of the wipe rod 5 and the wipe link 16. Further, since the wipe link 16 is machined from the block, it is expensive. In the open state of the vacuum circuit breaker shown in FIG. 6, since the line A is applied with a tensile force, it does not tend to bend from the beginning. Further, bending on the front side, the front side and the back side of the paper is restricted by the pins 4 and 13.

[0004]

[Problems to be solved by the device]

 Since the conventional transmission path guide mechanism is configured as described above, there are problems that it is expensive, the moving parts are heavy, the external dimensions are large, and the material powder comes out.

The present invention has been made to solve the above-mentioned problems, and it is possible to increase the number of parts by reducing the cost, reducing the weight of the moving part, reducing the outer dimensions, and making it difficult to generate the material powder. The purpose is not to lose weight.

[0006]

[Means for Solving the Problems]

 The transmission path guide mechanism according to the present invention includes a first member that is driven forward and backward, a fork-shaped wipe link provided so as to slide in the longitudinal direction of the member, and a fork-shaped portion of the wiper link. A second member fixed via a pin, a contact pressure spring for urging the wipe link forward (toward the second member), and a front end of the first member fixed in the longitudinal direction of each member. It has a long slot and is provided with a guide which engages with the pin in this slot.

[0007]

[Action]

 In the transmission path guide mechanism in this invention, the wipe link, which was conventionally machined from the block because the guide acts to reinforce the wipe link, is bent into a thin plate, and the conventional round washer is replaced with the guide to reduce the number of parts. It is possible to reduce the size, reduce the weight of the moving parts, reduce the cost, and prevent the material powder from being emitted.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows the closed state of the vacuum circuit breaker. Reference numeral 1 is a vacuum switch tube, 1a is a fixed contact of the vacuum switch tube, 1b is a movable contact of the vacuum switch tube, 2 is a shaft rotatably arranged, and 3 is fixed to the shaft 2 with the shaft 2 as a rotation center. A lever 4, a pin connecting the wipe rod 5 and the lever 3, a wipe rod 5 into which a bolt 8 is screwed with a guide 11 interposed therebetween, a round washer 6 for receiving a contact pressure spring 7, and a wipe rod 5 As a guide, a contact pressure spring that is arranged to be expandable between the round washer 6 and the wipe link 9, 8 is a bolt, and 9 is pins 10a and 10b that are slidably arranged on the cylindrical shaft of the wipe rod 5. Is a wipe link fixed to the insulating rod 12.

Reference numerals 10a and 10b are pins that penetrate the insulating rod 12 and the wipe link 9 and fix them, and 11 is fixed to the wipe rod 5 with a bolt 8, and the pins 10a and 10b are lengthened by opening and closing the vacuum circuit breaker. A guide that slides in the hole 11a, 11a is an elongated hole provided in the wipe link 9, 12 is an insulating rod that is electrically connected to the pin 13 and the wipe link 9, and pins 10a and 10b, and 13 is an insulating A pin that rotatably connects the rod 12 and the link 15, a pin 14 that is the center of rotation of the link 15, a 15 link that has the pin 14 as the center of rotation, A is a line that connects the pins 4 and 13, and W Is the contact pressure dimension, G is the gap between the wipe rod 5 and the wipe link 9, and T is the thickness of the wipe link 9.

FIG. 2 shows an open state of the vacuum circuit breaker. FIG. 3 shows a detailed view of the transmission path of FIG. FIG. 4 shows a part view of the wipe rod 5 of the transmission path.

FIG. 2 shows the vacuum circuit breaker in an open state. To close the vacuum circuit breaker as shown in FIG. 1, rotate the shaft 2 counterclockwise, push the insulating rod 12 with the lever 3, and rotate the link 15 counterclockwise with the pin 14 as the center of rotation. The movable contact 1b of the vacuum switch tube is pushed upward to bring the fixed contact 1a and the movable contact 1b into contact with each other to close the vacuum circuit breaker. Further, in order to apply contact pressure to the contact, the shaft is further rotated and the contact pressure spring 7 is compressed by the contact pressure dimension W.

At this time, in the vacuum circuit breaker closed state of FIG. 1, the line A tries to bend in the vertical direction in the figure due to the compressive force, but the elongated hole 11a of the guide 11 is restricted by the pins 10a and 10b, Prevents bending. In the open state of the vacuum circuit breaker shown in FIG. 2, the wire A does not tend to bend due to the tensile force. Bending in the front, back, and back of the page is restricted by pins 4 and 13. For this reason, since it is not necessary to increase the thickness U of the wipe link 9, the wipe link 9 can be processed by bending the thin plate, resulting in small size, light weight, and low cost. Further, since it is not necessary to make the gap between the wipe rod 5 and the wipe link 9 very small, it is difficult for the material powder to be generated due to the sliding of the wipe rod 5 and the wipe link 9 when opening and closing the vacuum circuit breaker.

In the above embodiment, the case of the vacuum circuit breaker has been described, but a circuit breaker or another switchgear may be used, and the same effect as that of the above embodiment can be obtained.

[0014]

[Effect of the device]

 As described above, according to the present invention, the wipe link, which was conventionally machined from the block, is bent into a thin plate, and the conventional round washer is replaced with a guide, so that the number of parts is not increased and the size, weight, and The cost can be reduced, and the material powder can be prevented from coming out easily.

[Brief description of drawings]

FIG. 1 is a view showing a closed state of a vacuum circuit breaker according to an embodiment of the present invention.

FIG. 2 is a view showing an open state of a vacuum circuit breaker according to an embodiment of the present invention.

FIG. 3 is a plan view a and a side view b showing a transmission path of a vacuum circuit breaker according to an embodiment of the present invention.

FIG. 4 is a plan view a, a side view b and a front view c of a wipe rod of a transmission path of an embodiment of the present invention and a conventional vacuum circuit breaker.

FIG. 5 is a view showing a closed state of a conventional vacuum circuit breaker.

FIG. 6 is a diagram showing an open state of a conventional vacuum circuit breaker.

FIG. 7 is a plan view a and a side view b showing a transmission path of a conventional vacuum circuit breaker.

FIG. 8 is a detailed view showing a case where the transmission path of the conventional vacuum circuit breaker is bent.

[Explanation of symbols]

 1 vacuum switch tube 1a fixed contact 1b movable contact 2 shaft 3 lever 4 pin 5 wipe rod 7 contact pressure spring 8 bolt 9 wipe link 10a pin 10b pin 11 guide 11a elongated hole 12 insulating rod 13 pin 14 pin 15 link

Claims (1)

[Claims for utility model registration] 1. A first member (wiping rod) driven forward and backward, a fork-shaped wipe link provided so as to slide in the longitudinal direction of this member, A second member (insulating rod) fixed to the fork-shaped portion via a pin, a contact pressure spring for urging the wipe link forward (toward the second member), fixed to the front end of the first member, A transmission path guide mechanism comprising an elongated hole in the longitudinal direction of each member, and a guide engaging with the pin in the elongated hole.