TWI437600B - Operation mechanism of switch - Google Patents

Description

Switch operating mechanism

The present invention relates to an operating mechanism for a switch that performs a current cut or switch.

In the conventional operating mechanism of the switch, in the case where a pair of operation plates (for example, input rods) having the same fulcrum (for example, the input rod shaft) are fixed to each other, a pin is disposed between the operation plates. Different parts of the shaft. At this time, the plug having the fixing ring groove is passed through the pair of operation plates, the fixing ring is prevented from coming off by the fixing ring, and the spacer is formed between the operation plates in order to maintain the interval between the pair of operation plates (spacer) The configuration of each of the components is combined to assemble into one structure. Further, Patent Document 1 shows a technique for preventing the plug from falling off.

(previous technical literature) (Patent Literature)

(Patent Document 1) Japanese Laid-Open Patent Publication No. 2007-298147 (summary and fifth drawing)

In the operating mechanism of the conventional switch, in order to obtain a structure, a support shaft, a pair of operation plates, a pin for fixing the operation plate, two fixing rings for preventing the pins from coming off, and a holding operation plate are required. A number of components, such as spacers. Moreover, in order to assemble the structure of the operating mechanism, it is necessary to insert the pin through the hole and the spacer of the operation plate in a state in which the spacer is sandwiched between the pair of operation plates, and the two fixing rings are embedded in The cumbersome work of the plug takes time.

In view of the foregoing problems, it is an object of the present invention to provide an operating mechanism for a switch having a small number of components and requiring a small number of man-hours for assembly.

The operating mechanism of the switch of the present invention comprises: a support shaft; a pair of operation plates supported by the support shaft and arranged in parallel; and a pin inserted through the through hole respectively disposed in the pair of operation plates; The holder has a pair of inner abutting portions that abut against the inner faces of the pair of operation plates such that an interval between the pair of operation plates arranged in parallel is fixed and a pair of outer abutments a sheet abutting the outer surfaces of the pair of operation plates, and sealing the through holes of the pair of operation plates into which the pins are inserted, so that the interval between the pair of operation plates is not enlarged; The interval between the pair of operation plates having the above-described latches is kept constant, and the plugs are prevented from coming off by the pair of operation plates.

The operating mechanism of the switch of the present invention is a mechanism for fixing the interval between one of the insertion pins and the operation panel, and does not need other spacers for maintaining the interval between the pair of operation plates, and does not need The fixing ring for preventing the pin from falling off can obtain an operating mechanism with a small number of components and a small number of assembly hours.

Fig. 8 is a perspective view showing an example of an operating mechanism of a conventional switch device. Further, the operation mechanism of the conventionally-operated switch is proposed by the same applicant in Japanese Patent Application (Japanese Patent Application No. 2009-252522).

In Fig. 8, between the two frames 1a and 1b having different shapes, a cam shaft 3 to which a cam 2 for transmitting the input driving force is fixed is disposed. A first latch 5 to which the drive plate 4 is fixed is disposed above the cam shaft 3. Further, an input rod shaft 7 to which the input rod 6 is fixed is disposed behind the cam shaft 3. A tripping rod rotating shaft 9 for supporting the tripping lever 8 is disposed in front of the camshaft 3, and an output lever shaft 11 serving as a center of rotation of the output lever 10 is disposed below the rear portion, and is disposed at the lower front portion A second latch 13 to which the drive plate 12 is fixed is disposed. Each of the above-mentioned shafts and each of the latches is disposed in the vertical direction and in parallel with the two frames 1a, 1b.

A large gear 14 is fixed to an end portion of the cam shaft 3 that protrudes outside the frame 1a, and a crank rod 15 that is subjected to crank motion in accordance with the rotation of the large gear 14 is coupled to the large gear 14. Further, an input spring 16 is provided which is supported by the frame at one end and which is coupled to the operation of the crank 15 and expands and contracts to impart a driving force to the large gear 14 in the input direction. Further, on the output rod 10, one end side of the output link 17 is rotatably supported, and the other end side of the output link 17 is coupled to a movable contact such as a vacuum valve of the vacuum circuit breaker.

Fig. 9 is a perspective view showing a portion of the accumulator mechanism which is mainly above and behind the cam shaft 3 and which is mainly a driving force. Fig. 9 is a view showing the internal structure of the frame 1b on the right side of the two frames 1a, 1b of Fig. 8. The cam 2 is fixed to the cam shaft 3 to which the large gear 14 is coupled and the driving force from the input spring 16 is transmitted. Two insertion levers 6 are disposed on both sides of the cam 2 with a gap therebetween, and a locking lever 6 is disposed on one end side of the input lever 6, and the other end side is fixed to the other end side. The lever shaft 7 is inserted to form a rotation of the input lever shaft 7 as a center.

The input shaft 7 is provided with a torsion spring 18, one end of which is hung on the input rod 6, and the other end is locked to the side of the frame 1b, whereby the input rod 6 is rotated in the counterclockwise direction in the figure. However, a stopper (not shown) is provided at a position above the position of the figure so as not to rotate to the counterclockwise side. Further, the input rod 6 is provided with a pin 19 for connecting the two input rods 6 in series, and the pin is disposed at a position where the cam shaft 3 abuts against the cam 2 when the cam shaft 3 rotates.

Above the cam shaft 3, the first latch 5 is movably disposed on the frame 1a, 1b. A notch portion 5a serving as a latch portion is formed in a portion of the first latch 5, and the notch portion 5a is disposed to be engaged with the locking portion 6a provided on the input lever 6. In a general state in which it is not locked, as shown in the drawing, in order to allow the locking portion 6a of the input lever 6 and the cutout portion 5a of the first latch 5 to be held at a spaced position, The torsion spring 18 is pushed in a counterclockwise direction. Then, when the input lever 6 is rotated in the clockwise direction in the drawing, the locking portion 6a and the notch portion 5a are engaged. In the first latch 5, a drive plate 4 to which a driving force for releasing the engagement is applied is attached by a rivet, a bolt, or the like.

Fig. 10 is a perspective view showing the input rod 6. As shown in the figure, a locking portion 6a that engages with the first latch 5 is formed on one end side, and a shaft hole 6b that is fixed to the input rod shaft 7 is provided at the other end side. Further, a pin hole 6c for fixing the plug 19 is provided at a position close to the shaft hole 6b between the locking portion 6a and the shaft hole 6b. Further, the cutout portion 6d is used to lock the torsion spring 18. Further, the details of other parts of the operating mechanism of the conventional switching device shown in Fig. 8 are omitted here.

(First embodiment)

The outline of the configuration of the operating mechanism of the switch in the prior art is described above using Figs. 8 to 10 .

The present invention is applied to a structure in which a pair of input levers (a pair of operating plates) 6, a lever shaft (support shaft) 7, and a latch 19 are held by an operating mechanism of the switch shown in an example. It is also applicable to other parts of the operating mechanism of the switch if it is a structure that holds a pair of operation plates, a support shaft, and a plug.

The first embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view showing a main part of an operating mechanism of a switch of the first embodiment. Fig. 2 is a front view, Fig. 3 is a right side view, and Fig. 4 is a rear view. 5 is a perspective view of the holder used in FIG. 1 , FIG. 6 is a rear view of the holder, and FIG. 7 is a perspective view of the operation panel used in FIG. 1 .

As shown in FIG. 7, the operation panel 31 is formed with a through hole 31a through which the support shaft 32 passes, and a through hole 31b through which the plug 33 passes, and a slit 31c that engages with the holder 34 is formed. Since the slit 31c is provided, the lower end portion of the operation panel 31 is an uneven portion. Although the operation panel 31 is shown as a flat plate, as shown in an example of Fig. 10, a flat plate made of a steel material having a complicated shape may be used, and a part of the plate material may be bent depending on the case. The operation panel 31 is generally a two-piece set, usually a pair of operation panels 31 of the same shape, and is disposed in parallel as shown in Fig. 1. One of the support shafts 32 is orthogonal to the through-holes 31a of the pair of operation plates 31, and the pair of operation plates 31 are fixed to the support shafts at predetermined intervals, and may be fixed even without maintaining a predetermined interval.

The pins 33 are orthogonal to each other and penetrate through the respective through holes 31b of the pair of operation plates 31. The pin 33 is referred to as a standard pin for a "parallel pin". The length of the latch 33 is such that the plug 33 is inserted into the through hole 31b of the pair of operation plates 31 disposed at predetermined intervals, and does not protrude from the outer side of the operation panel 31, respectively. In the case where the holder 34 covers the respective outer sides of the operation panel 31, there is also a length which does not fall off between the operation panel 31 from one of the predetermined intervals even when the latch 33 is biased toward one side.

Fig. 5 is a view showing a pair of operation plates 31 and a holder 34 for holding the pins 33 at predetermined intervals. The holder 34 is an integrally formed member formed by press forming (bending) a steel sheet. As shown in Fig. 5 and Fig. 1, a pair of inner abutting pieces 34b which are orthogonally curved on the upper portion of the substrate portion 34a (on the front sides of the drawing) are for maintaining a pair of operation plates 31 therebetween. The predetermined interval, that is, is kept fixed, and abuts against the respective inner faces of the pair of operation panels 31. Therefore, the length between the outer surfaces of the pair of inner abutting pieces 34b is determined. Both ends (the left and right ends of FIG. 5) of the intermediate portion of the substrate portion 34a of the holder 34 are also in contact with the respective inner surfaces of the pair of operation plates 31. Therefore, it determines the length between the ends of the intermediate portion.

The bottom plate portion 34c is formed by being bent in an orthogonal manner at a lower portion (in front of the drawing) of the substrate portion 34a. The pair of outer abutting pieces 34d are formed by being bent orthogonally to both sides (upper sides of the drawing) by the bottom plate portion 34c. The inner surfaces of the pair of outer abutting pieces 34d are respectively in contact with the outer surfaces of the pair of operation plates 31, and the pair of operation plates 31 that are kept at a certain interval are not expanded outward, and cover the pair of operation plates 31. The through hole 31b of the outer surface, that is, through the plug, keeps the plug 33 from falling off. The neck portion 34e which is narrowed between the bottom plate portion 34c and the outer contact piece 34d is engaged with the slit 31c of the operation panel 31. This situation is not so much a snap, but rather a better fit. In the state of being engaged or fitted, both ends of the bottom plate portion 34c (front and rear portions on the left and right sides of the drawing) are in contact with the inner surfaces of the pair of operation plates 31, respectively. Therefore, the length of both ends of the bottom plate portion 34c is also determined such that the pair of operation plates 31 are spaced apart from each other.

The inner surface of the pair of operation plates 31 abuts on the holder 34, and the outer surfaces of the pair of inner abutting pieces 34b, the both ends of the intermediate portion of the substrate portion 34a, and the both ends of the bottom plate portion 34c are collectively referred to as the inner side. Abutment. Between the inner abutting portion and the inner surface of the pair of outer abutting pieces 34d, a plate thickness gap of the operation plate 31 into which only the respective operation plates 31 can be inserted is formed. Since the inner abutting portions are respectively abutted by one end portion (upper portion in the drawing) and the other end portion (lower portion in the drawing) of the pair of operation plates 31, a pair of operation can be maintained together with the pair of outer abutting pieces 34d. The spacing between the plates 31 is stable. Thereby, a spacer for holding other members whose intervals between the pair of operation panels 31 are fixed is not required. Each of the through holes 34f of the pair of outer contact pieces 34d of the holder 34 is formed in a state in which the pair of operation plates 31 are attached to the fixture 34, and is formed in the through holes 31a of the pair of operation plates 31. position. Further, the through hole 34f of the outer abutting piece 34d can also pass through the outer abutting piece 34d around the support shaft 32, that is, by omitting the outer abutting piece 34d so as to surround the support shaft 32 in an approximately C shape.

In the assembly method, the latch 33 is interposed between the pair of operation plates 31, and the interval between the pair of operation plates 31 is held in a fixed combination, and the front panel is obliquely combined from the front surface of the holder 34 to the upper front side to make a pair of operation panels. Each of the slits 31c is engaged with the neck portion 34e of the holder 34, and the inner abutting portion of the holder 34 abuts against the inner faces of the pair of operation plates 31, and the outer abutting piece 34d of the holder 34 abuts. It is mounted on each outer surface of the pair of operation panels 31. In the state of being correctly installed, the respective through holes 31a of the pair of operation plates 31 are aligned with the respective through holes 34f of the pair of outer contact pieces 34d, so that the support shaft 32 penetrates the through holes 34f and 31a. The support shaft 32 is fixed to the pair of operation plates 31.

Thereby, the pair of operation plates 31 in which the pins 33 are inserted are stably held at a constant interval in parallel by the holders 34, and the insertion of the pins 33 from the through holes 31b can be prevented. Further, the pair of operation panels 31 are fixed to the support shaft as needed. The slit 31c of the operation panel 31 is engaged or fitted to the neck portion 34e of the bottom plate portion 34c of the holder 34, so that the rotation of the operation panel 31 with the support shaft 32 as the center of rotation can be prevented, and the operation panel 31 is not displaced. The pair of operation plates 31, the latch 33, and the holder 34 are integrally formed to rotate with the support shaft 32 as a center of rotation.

By using the holder 34 to prevent the pin 33 from coming off, the portion protruding from the operation panel 31 only needs to consider the thickness of the plate member of the holder 34, and it is possible to achieve the use of the groove-attached pin method in the prior art. The portion protruding to the outside of the operation panel 31 is suppressed. In this way, it is possible to reduce the size of the switch such as the vacuum circuit breaker including the portion, and to suppress the protruding portion. By being mounted in the field of the drive structure, interference with other portions can be avoided.

According to the first embodiment, when the pin 33 disposed between the pair of operation plates 31 is prevented from falling off and the switch such as a vacuum interrupter is downsized, the pin 33 can be used without the grooved pin or the differential pin. Instead, a low-cost standard pin such as a parallel pin can be used. In the assembly work, a thin curved plate is used, that is, only by attaching the holder 34, the pair of operation plates 31 can be held and the insertion of the pin 33 can be prevented, and the work of attaching the fixing ring to the pin 33 is not required. In the assembly work of the switch, it is possible to reduce the number of components and to reduce the cost associated with the reduction of the components. Moreover, due to the reduction in the number of components, the efficiency of assembly is improved, the loss caused by mistakes in the writing industry can be reduced, and the quality of the switch is improved.

1a, 1b. . . frame

2. . . Cam

3. . . Camshaft

4,12. . . Driver board

5, 13. . . Latch

5a. . . Cutting section

6. . . Input rod

6a. . . Clamping part

6b. . . Shaft hole

6c. . . Pin hole

6d. . . Cutting section

7. . . Input shaft

8. . . Jump off pole

9. . . Tripping pole rotation axis

10. . . Output rod

11. . . Output shaft

12. . . Driver board

14. . . big gear

15. . . crank

16. . . Input spring

17. . . Output link

18. . . Torsion spring

19. . . plug

31. . . Operation panel

31a. . . Through hole

31b. . . Through hole

31c. . . incision

32. . . Support shaft

33. . . plug

34. . . Holder

34a. . . Substrate part

34b. . . Inner abutment piece

34c. . . Bottom plate

34d. . . Outer abutment piece

34e. . . neck

34f. . . Through hole

Fig. 1 is a perspective view showing a main part of an operating mechanism of a switch according to a first embodiment of the present invention.

Fig. 2 is a front view of Fig. 1.

Fig. 3 is a right side view of Fig. 1.

Fig. 4 is a rear view of Fig. 1.

Fig. 5 is a perspective view of the holder of Fig. 1.

Fig. 6 is a rear view of the holder of Fig. 5.

Fig. 7 is a perspective view of the operation panel of Fig. 1.

Fig. 8 is a perspective view showing an example of an operating mechanism of a conventional switch device.

Fig. 9 is a perspective view showing an important part of Fig. 8.

Fig. 10 is a perspective view showing the input rod of Fig. 9.

31. . . Operation panel

32. . . Support shaft

33. . . plug

34. . . Holder

34b. . . Inner abutment piece

34d. . . Outer abutment piece

Claims (6)

An operating mechanism of a switch, comprising: a support shaft; a pair of operation plates supported by the support shaft and arranged in parallel; the pin is inserted into the through holes respectively provided in the pair of operation plates; and the holder And a pair of inner abutting portions that abut the respective inner surfaces of the pair of operation plates and an interval between the pair of operation plates, wherein an interval between the pair of operation plates arranged in parallel is kept constant Without augmenting, abutting against the outer surfaces of the pair of operation plates, and sealing one of the through holes of the pair of operation plates into which the pins are inserted, the abutting tabs on the outer side; The interval between the pair of operation panels is kept fixed to prevent the pins from coming off the pair of operation panels. The operating mechanism of the switch of the first aspect of the invention, wherein the pair of outer abutting pieces are respectively formed with through holes, and are penetrated by the support shafts of the pair of operation plates. The operating mechanism of the switch of claim 1 or 2, wherein one end of the pair of operation plates is engaged or fitted with the holder. The operating mechanism of the switch of claim 1 or 2, wherein the inner abutting portions abut against one end and the other end of the pair of operating plates. The operating mechanism of the switch of claim 3, wherein the inner abutting portions are respectively in contact with one end portion and the other end portion of the pair of operation plates. The operating mechanism of the switch of claim 1 or 2, wherein the holder is formed by bending a steel material.