JPH04126795A - Opening and closing device - Google Patents

Abstract

PURPOSE:To obtain an opening and closing device improved in action characteristics and reliability over a long period without causing crack, release, etc., by applying a coating material to a sliding part or fitting member consisting of a steel material. CONSTITUTION:A coating material of TiC is applied to the surface of either one member of sliding member or fitting member consisting of steel material having a operating ring mechanism to form TiC coating film having about 3-5mum thickness and on the other hand, coating material of TiN is applied to the above-mentioned residual member to form TiN coating film having about 3-5mum thickness.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a switchgear that is incorporated into, for example, an electric motor or the next side of a power condenser, and particularly relates to an operation link mechanism in this switchgear. Regarding.

(Prior Art) The operation link mechanism in this type of opening/closing device that has already been proposed is configured as shown in FIGS. 3 to 5.

That is, in FIGS. 3 to 5, a plurality of vacuum valve chambers 2 (only one in the figure) are formed in a box-shaped insulating case 1 made of an insulating material, and each of the vacuum valve chambers 2
A power supply terminal 3 and a load terminal 4, which serve as a three-phase power supply constituting a main circuit, are provided facing each other above and below the insulating case l, in which the main circuit is located. Further, a well-known vacuum valve 5 is vertically installed between the power supply terminal 3 and the load terminal 4, and each fixed electrode 5a of this vacuum valve 5 is connected to the power supply terminal 3.
The movable electrode 5b of the vacuum valve 5 is connected to each of the load terminals 4.

On the other hand, a machine frame 6 is provided on the front surface of the insulating case 1 and is integrated with the truck.A well-known operation link mechanism 7 is integrated with the movable electrode 5b of the vacuum valve 5 on the machine frame 6. The drive lever 9 is connected to the operating rod 8 via a drive lever 9 which is pivotally mounted on a support shaft 9a.

That is, in the middle of the machine frame 6, there is a charging cam 10 and an arm rod 11.
is rotatably mounted on a rotation shaft 12, and the upper arm rod 1
1 is provided with a closing spring 13 biasing the closing cam 10 so as to rotate clockwise. In addition, a roller (bearing) is installed at the biased position of the input cam 10.
14 is attached to the machine frame 6, and a T-shaped input catch lever 15 is attached to the roller 14 with a pin shaft 16.
The shaft is mounted so as to protrude above the rotation path of the shaft.

Further, one end 15a of the input catch lever 15 is locked to a input shaft 17 having a half-moon cross section and integral with the operating shaft of an electromagnet (not shown), and the other end 15b of the input catch lever 15 is , a support shaft 18 is attached to the machine frame 6.
It is in contact with a part of the louver 19 which is mounted on the shaft. Furthermore, a part of this lever] 9 is provided with the drive lever 9.
The levers 9 are connected to each other via a connecting rod 20, and the lever 9 is attached to rotate counterclockwise around a support shaft 18 by a circuit spring 21 having a stronger elasticity than the closing spring 13. Forced. Furthermore, at the upper end of the louver 19,
The second lever 22 is connected to the pin 23, and this second
The lever 22 includes a third lever 24 having a roller 24a.
are connected by a pin 25. Further, at one end of the third lever 24, there is provided a swing arm rod 2 which is pivotally connected to the machine frame 6.
6 and the base of the trip lever 27 are connected to the pin shaft 28.
The free end of the trip lever 27 is connected by a pin 31 to a biased position of a trip catch member 30 which is mounted on the machine frame 6 above the input cam 10 with a support shaft 29. ing. Furthermore, a part of the trip catch member 30 is locked by a trip shaft 32 attached to the machine frame 6 and having a semicircular cross section, and this trip shaft 32 receives an opening command for the vacuum valve 5. connected to an electromagnet (trip coil).

Therefore, the operating linkage mechanism in the opening/closing device described above operates as follows.

1. Regarding the vacuum valve closing operation, in Figure 4, when the vacuum valve closing command is input,
An electromagnet (throwing coil), not shown, is excited. Then, the input shaft 17, which has a half-moon-shaped cross section, rotates clockwise, and the input catch lever 15, which is engaged with the input shaft 17, rotates clockwise around the pin shaft 16. As the roller 14 moves, the roller 14 comes off from the input catch lever 15. Then, the input cam 1 of this roller 14
0 rotates clockwise around the support shaft 12 due to the elasticity of the closing spring 13, so that the roller 24a in contact with this loading cam 10 is pushed outward. Then, as shown in FIG.
Since the lever 22 and the third lever 24 extend substantially linearly, the second lever 19 connected to the second lever 22 rotates to the right around the support shaft 18, so that the connecting rod 20 connected thereto rotates to the right around the support shaft 18. Since the drive lever 9 is rotated to the left around the support shaft 9a via the drive lever 9, the operating lever 8 connected to the operating lever 9 is pushed upward, and the movable electrode 5b integrated with the operating lever 8 is connected to the vacuum valve. Since it is connected to the fixed electrode of 5, the vacuum valve 5
is closed.

2. Regarding the opening operation of the vacuum valve, in Figure 5, when the command to open the vacuum valve is input,
An electromagnet (trip coil), not shown, is excited.

Then, the trip shaft 32 interlocked with this rotates counterclockwise, and the rotation of the trip shaft 32 disengages the trip catch member 30, so the trip catch member 30 becomes a support shaft. Since the trip lever 27, which is integrated with the pin 31 connected to the trip catch member 30, is moved to the right, it is connected to the trip lever 27 by the pin shaft 28. Since the swing arm rod 26 rotates counterclockwise around its support shaft 26a, the third lever 24 and the second
The lever 22 is bent into a “dog” shape by the elasticity of the circuit spring 21, and the first lever 19 rotates counterclockwise around the support shaft 18, so this third lever 19 is driven via the connecting rod 20. By rotating the lever 9 around the support shaft 9a and pulling down the movable electrode 5b integrated with the operating rod 8, the movable electrode 5b is separated from the fixed electrode 5a of the vacuum valve 5 to form an open circuit. (See Figure 4).

As described above, in order to improve wear resistance and operating efficiency of the operation link mechanism in the above-mentioned opening/closing device, grease is applied as a lubricant to the sliding members and the pivot joints thereof. It is designed to operate smoothly.

On the other hand, as shown in FIG. 6, the operation link mechanism 7 in the above-mentioned opening/closing device has a base material made of sliding members, fitting members, etc., in order to improve wear resistance and operating efficiency. For example, a steel material a coated with a coating (ceramic thin film) b made of TiC (titanium carbide) has already been proposed.

(Problem to be Solved by the Invention) However, since the operation link mechanism in the above-mentioned opening/closing device has grease applied as a lubricant to its sliding members and its pivot joints, it is difficult to use grease or It deteriorates due to oxidation over time, which not only impairs its operating characteristics but also poses a risk of malfunction, and has the disadvantage of requiring periodic maintenance and inspection.

On the other hand, T is applied to the steel material a as each sliding member, fitting member, etc.
Products coated with a coating material (ceramic thin film) b made only of iC (titanium carbide) have the disadvantage that the toughness and adhesion strength of the coating material (ceramic thin film) are lower than that of TiN (titanium nitride). In sliding members, fitting members, etc. that are subjected to high loads during use, deformation of the steel material a may cause cracking or peeling of the coating material b (ceramic thin film). Furthermore, in sliding members made of a combination of coating materials (ceramic thin films) made of TiN (titanium nitride), which has high toughness and adhesion strength, the coefficient of friction increases, causing problems in operating characteristics, reliability, and the like.

The present invention has been made in view of the above-mentioned circumstances, and it does not require applying grease as a lubricant to the sliding members of the operating link mechanism or its pivot members, and it also uses a coating material (ceramic thin film). It is an object of the present invention to provide a switchgear whose operating characteristics and reliability are improved over a long period of time without cracking or peeling.

[Structure of the invention]

(Means for Solving the Problems and Their Effects) The present invention provides an operation link mechanism in a switchgear, in which a sliding member or a fitting member made of steel of the operation link mechanism is made of TiC.
By coating a coating material (ceramic thin film) made of (titanium carbide) or TiN (titanium nitride) and sliding or fitting this coating material (ceramic thin film) made of TiC or TiN, a sliding member made of steel material can be formed. Alternatively, by reducing the coefficient of friction of the fitting members, etc., and without applying grease, TiN, which has high toughness and adhesion strength, can be used for sliding members and fitting members that are subject to large deformations under high loads during actual use. By coating the coating material with this material, the coating material is prevented from cracking or peeling, and the operating characteristics and reliability are improved over a long period of time.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

Note that the present invention includes the same constituent members as those in the above-mentioned specific example.
The same reference numerals will be used for explanation.

In FIG. 1 and FIG. 2 (A) and (B), the reference numeral 12 is
A support shaft mounted on the machine frame 6 in an operation link mechanism in an opening/closing device that opens and closes a vacuum valve, and this support shaft 1
A charging cam 1o is mounted on the shaft of the machine frame 11, and a roller 14 is attached to the biased position of the charging cam 1o. A bottle shaft 16 is mounted so as to protrude above the rotation path of the roller 14.

Therefore, as shown in FIG. 2(A), the sliding member in the link mechanism 7 described above is made of steel material a as a base material.

That is, as a first step, the steel material a, which is the base material of each sliding member, is heated in advance to a processing temperature of about 350°C in a vacuum deposition apparatus, and then heated in a vacuum at a temperature of about 10-5. By continuously supplying about 80 cc of acetylene gas over a period of about 60 to 90 minutes and evaporating Ti (titanium), a coating material (ceramic thin film) of a thin film of TiC of about 3 to 5 μm is formed. Coating.

Next, as shown in FIG. 2(B), the other fitting member that receives a high load in the link mechanism 7 described above is formed of steel material a as a base material.

That is, as a first step, the steel material a, which is the base material of the fitting member, is heated in advance to a processing temperature of about 350°C in a vacuum evaporation apparatus, and then placed in a vacuum of about 10-5. Approximately 1
By continuously supplying about 00 cc of nitrogen gas for about 60 to 90 minutes and evaporating Ti (titanium), a coating material (ceramic thin film) of about 3 to 5 lt m of TiN thin film is formed. Coating.

Next, a specific example will be explained.

Table 1 shows an example of the results of measuring the hardness and adhesion strength of a coating material (ceramic thin film) on carbon steel (S50C).

Table 1, ie, Table 1 above, shows that although TiN has a lower Vickers hardness than TiC, the toughness of the coating material is correspondingly higher. Also, in the same way, TiN is
Increases adhesion strength.

These results indicate that TiN has better durability (cracking resistance) and peeling resistance of the coating material (ceramic thin film).

On the other hand, Table 2 shows the friction coefficient (
This is an example of the results of measurement (without lubrication).

Table 2, that is, the above-mentioned Table 2 shows that the combination of TiC and TiN has the smallest coefficient of friction and is excellent in friction characteristics.

In this way, the operation link mechanism in the opening/closing device of the present invention is constructed by coating each sliding member, fitting member, etc. with a coating material (ceramic thin film) of TiC (titanium carbide) and TiN (titanium nitride), and )
By using TiN (titanium nitride) coating material (ceramic thin film) for sliding action and fitting action,
It is possible to reduce the coefficient of friction of each sliding member made of steel, prevent galling, etc., eliminate the need for lubricating oil, eliminate the need for maintenance and inspection of lubricating oil, and moreover, it can be used under high loads. One part II which undergoes large deformation due to the impact: T
By coating i N wo, the coating material (
(ceramic thin film) can be prevented from cracking or peeling.

〔Effect of the invention〕

As described above, according to the present invention, in the operation link mechanism of a switchgear, the sliding member or fitting member made of steel of the operation link mechanism is coated with a coating material (ceramic) made of TiC (titanium carbide) or TiN (titanium nitride). By sliding or fitting the coating material made of TiC or TiN, it is possible not only to reduce the coefficient of friction of sliding members or fitting members made of steel, but also to reduce grease. Without coating, there is no oxidation or deterioration of lubrication efficiency due to aging, and it is possible to improve wear resistance and corrosion resistance, and there is no need for maintenance and inspection using lubricants that eliminate the need for lubricants. The sliding and fitting parts, which are subject to large deformations under high loads, are coated with a TiN coating material that has high toughness and adhesion strength. It has excellent effects such as being able to improve operating characteristics and reliability over a period of time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of the switchgear of the present invention, and FIGS. 2(A) and 2(B) are enlarged cross-sections of chain circle A section and chain circle B section in FIG. 3 is a side view of the already proposed switchgear, FIGS. 4 and 5 are diagrams for explaining the operation of the already proposed switchgear, and FIG. 6 is a side view of the already proposed switchgear. FIG. 2 is an enlarged view showing the main parts of the proposed switchgear. 6... Machine frame, 7... Operation link mechanism, 10... Closing cam, 14... Roller, 15... Closing catch lever, a-... Steel material, c--T i C, d-TI
N0 applicant's agent Mr. Sato Figure 1 (A)
(B) Figure 2, Figure 4, Figure 5, Figure 6

Claims (1)

[Scope of Claims] 1. An operating link mechanism in an opening/closing device, characterized in that a sliding member or a fitting member made of steel of the operating link mechanism is coated with a coating material of TiC or TiN. 2. Coating the surface of one of the steel sliding members or fitting members of the operation link mechanism with a TiC coating material to form a TiC film, and coating the remaining members with a TiN coating material. 2. The switchgear according to claim 1, wherein a TiN film is formed by coating the TiN film.