JP3486805B2 - Sliding contact member, opening / closing operation device using the same, and circuit breaker using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for use in a switching device such as a circuit breaker provided with a sliding contact portion that relatively slides in an opening / closing operation device such as a power storage mechanism, a latch mechanism, and a link mechanism. The present invention relates to a sliding contact member , an opening / closing operation device using the same, and a circuit breaker using the same.

[0002]

2. Description of the Related Art A switching device such as a circuit breaker is used for a long period of time, and it is required to perform a stable opening / closing operation during the period of use. Therefore, maintenance such as grease application is regularly performed on the sliding contact parts such as engaging parts, sliding parts, and rotating parts of the switchgear for lubrication and rust prevention. The base material of the sliding contact member having the contact portion is subjected to surface treatment for various surface modifications to extend the maintenance cycle or eliminate maintenance.

FIG. 6 is a sectional view of only a main part of a sliding contact member in a conventional circuit breaker. In FIG. 6, the sliding contact member 1
Grease 11 is applied to the surface of 0.

7 to 9 show a ball screw portion of a sliding contact member disclosed in Japanese Unexamined Patent Publication No. 8-129938, FIG. 7 is a plan view, FIG. 8 is a vertical sectional front view, and FIG. It is a vertical side view which expanded only the principal part. This ball screw part 20
A nut body 23 is screwed onto the screw shaft 21 via a plurality of balls 22. Then, a Ni-P plating film 24 is provided on the surfaces of the screw shaft 21 and the nut body 23, and this is used as a base, and a Ni-P-PTFE composite plating film 25 is provided thereon. Also, the ball 22
A Ni-P plating film 24 is provided on the surface of the.

FIG. 10 is a sectional view of only a main part of the sliding contact member disclosed in Japanese Patent Laid-Open No. 6-322557. In FIG. 10, a Ni-P plating film 24 is provided on the base material 10, and this is used as a base, and a TiN plating film 26 is provided thereon.
Is provided.

Next, the operation will be described. Since the sliding contact member used for the energy storage mechanism, the latch mechanism, the link mechanism, etc. of the switching operation device in the circuit breaker operates at high speed or receives a high surface load, this sliding contact member is a base material. If it is left as it is, not only oxidative deterioration and corrosion will occur over time, but also abnormal wear and seizure will occur, and problems such as malfunction will occur. Therefore, by applying grease 11 as shown in FIG. 6, the corrosion resistance of the sliding contact members is maintained, and the sliding contact members are prevented from being in direct contact with each other to maintain the lubricity.

In the conventional sliding contact members shown in FIGS. 7 to 9, the balls 22 are provided with the Ni-P plating film 24 to enhance the corrosion resistance of the balls 22, and the screw shaft 21 and the nut body 23 are The Ni-P plating film 24 is provided as a base to improve the corrosion resistance, and the Ni-P-PTFE composite plating film 25 is provided thereon to enhance the lubricity of the screw shaft 21 and the nut body 23. Also, the corrosion resistance and lubricity of the sliding contact member such as the nut body can be maintained.

In the conventional sliding contact member shown in FIG. 10, a Ni-P plating film 24 is provided on the base to enhance the corrosion resistance, and a TiN plating film 26 is provided on the Ni-P plating film 24 to provide hardness and wear resistance. Therefore, the corrosion resistance, wear resistance and lubricity of the sliding contact member can be maintained.

[0009]

However, when grease is applied to the sliding contact member as in the conventional example shown in FIG. 6, the grease undergoes oxidation and changes in viscosity depending on the environment in which the sliding contact member is used and over time. Therefore, due to this, not only the operating characteristics of the sliding contact member are impaired, but also an operation failure may occur, and therefore, there is a problem that maintenance is required to periodically replenish the grease.

Further, as in the conventional example shown in FIG.
When the P-PTFE composite plating film 25 is provided, the hardness of the plating film 25 changes depending on the PTFE content. However, even if the PTFE content is low and the hardness is high, it is Hv500 to 550, and the overall hardness is Since it is low, it is necessary to keep the surface pressure acting on the sliding contact member low, and it cannot be applied to the sliding contact member having high surface pressure.

The Ni-P-PTFE composite plating film 2
No. 5 can be hardened to a hardness of about Hv750 by subjecting it to a heat treatment at 300 to 400 ° C. after the plating, but when such a heat treatment at 300 to 400 ° C. is used, a material such as an SCM material used as a base material is used. Since the hardness of the base material of the general steel material is softened, it is necessary to use a special steel material such as SKD11 that can withstand a return temperature of 500 ° C. or higher, which is a problem of high cost.

Further, as in the conventional example shown in FIG.
When the N plating film 26 is provided, it is necessary to heat the base material to about 500 ° C. when performing the plating.
Similar to the case where the -P-PTFE composite plating film 25 is provided, the general steel material used as the base material has a problem that the hardness of the base material is reduced.

The present invention has been made in view of such circumstances, and a Ni-P plating film is provided on the surface of a base material, and a Ni-P-B plating film is provided on the Ni-P plating film. The Ni-P-B plating film is impregnated with oil, or the Ni-P-B plating film is impregnated with polytetrafluoroethylene (PTFE), or the surface of the base material is Ni-P-B plating. By providing a film and impregnating it with oil, or by providing a Ni-P-B plating film on the surface of the base material and then impregnating polytetrafluoroethylene (PTFE) on it, grease can be added. A sliding contact member that can stabilize operation characteristics over a long period of time without coating, is easy to manufacture and is inexpensive, and has corrosion resistance, wear resistance, and lubricity, an opening / closing operation device using the same, and the same. Get the circuit breaker The purpose is to

[0014]

Opening / closing operation according to the first invention
Apparatus, and characterized in that relatively sliding contact sliding contact portion on the surface of a substrate having provided a Ni-P plating film, it is provided with a sliding member which is Ni-P-B plating film on top of this To do.

The sliding contact member according to the second invention is relatively slidable.
Ni-P plating film on the surface of the base material that has sliding contact parts
To improve corrosion resistance, and Ni-P-B plating on this
By providing a film to improve hardness, wear resistance and lubricity, Ni-
It is characterized in that the P-B plating film is impregnated with oil to further enhance the corrosion resistance and lubricity.

The sliding contact member according to the third invention is relatively slidable.
Ni-P plating film on the surface of the base material that has sliding contact parts
To improve corrosion resistance, and Ni-P-B plating on this
By providing a film to improve hardness, wear resistance and lubricity, Ni-
Polytetrafluoroethylene (PT) on P-B plating film
It is characterized in that it is impregnated with FE) to further enhance corrosion resistance and lubricity.

In the sliding contact member according to the fourth aspect of the present invention, a Ni-P-B plating film is provided on the surface of the base material having a sliding contact portion that relatively slides to enhance hardness, wear resistance and lubricity. It is characterized in that it is impregnated with oil to further enhance the corrosion resistance and lubricity.

In the sliding contact member according to the fifth aspect of the present invention, a Ni-P-B plating film is provided on the surface of the base material of the sliding contact member that relatively slides to enhance hardness, wear resistance and lubricity. It is characterized in that polytetrafluoroethylene (PTFE) is impregnated on the top to further enhance the corrosion resistance and lubricity.

A circuit breaker according to a sixth aspect of the invention is characterized in that the sliding contact member according to any one of claims 2 to 5 is provided in the opening / closing operation device. A circuit breaker according to a seventh invention is
The opening / closing operation device according to claim 1 is used.
It

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view of only a main part of a sliding contact member according to the first invention of claim 1, and FIG. 4 is heat treatment for Ni-P plating and Ni-P-B plating. The figure which shows the relationship between temperature and hardness, and FIG. 5 is Ni-P.
It is a figure which shows the relationship between the heat treatment temperature of plating and Ni-P-B plating, and the amount of wear.

A general steel material such as SCM415 capable of heat treatment is used, and an electroless Ni-P plating film 2 is provided on the surface of a base material 1 which is carburized and tempered. Electroless Ni-on the plating film 2
A P-B plating film 3 is provided.

Next, the operation will be described. A power storage mechanism, a latch mechanism, and a switching mechanism for switching devices such as circuit breakers.
A sliding contact member used in a link mechanism or the like, more specifically, a sliding contact member having a sliding contact portion that relatively slides in contact with each other, such as an engaging portion, a sliding portion, and a rotating portion, operates at high speed. ,
Alternatively, the surface of the base material of the sliding contact member has high hardness and good wear resistance as shown in FIG. 4 and FIG. P plating film 2
Since the Ni-P-B plating film 3 having a hardness of about Hv750 is provided as it is, the base material 1 is less likely to wear. Moreover, although the Ni-P-B plating film 3 has relatively good corrosion resistance over time, the Ni-P-B plating film 3 is superior in corrosion resistance to the Ni-P-B plating film 3 and has a hardness of about Hv500 to 550.
-Because the P plating film 2 is on the base, it is possible to maintain the corrosion resistance of the base material 1 for a long period of time, and the sliding contact member of the switchgear such as a circuit breaker can maintain good operating characteristics for a long time. it can.

Further, since the above-mentioned heat treatment is only a plating process, the hardness of the base material 1 can be lowered even when a general steel material subjected to heat treatment such as carburizing is used as the base material. Therefore, corrosion resistance, wear resistance, and lubricity can be imparted, and the surface pressure acting on the sliding contact member can be set high.

Further, since the electroless plating can form a uniform film, the accuracy of the gap can be improved even when the gap of the sliding contact portion such as the shaft and the bearing that relatively slides is specified. You can

Embodiment 2 FIG. 2 is a sectional view of only a main part of a sliding contact member according to a second invention of claim 2 and a third invention of claim 3. The same functions and operations as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

An ordinary electroless steel material such as SCM415 is used, and an electroless Ni-P plating film 2 is provided on the surface of a base material 1 which is carburized and tempered. Electroless Ni-on the plating film 2
A P-B plating film 3 is provided, and oil 4 or polytetrafluoroethylene (PT) is added to the Ni-P-B plating film 3.
FE) 5 is impregnated.

In the second embodiment, in addition to the effects described in the first embodiment, oil 4 or polytetrafluoroethylene (PTFE) 5 is impregnated into the Ni-P-B plating film 3 on the surface. Therefore, the surface load acting on the sliding contact member is N having hardness of about Hv750 even when plated.
Since the i-P-B plating film 3 receives and also contains the oil component 4 or the polytetrafluoroethylene (PTFE) 5, the corrosion resistance and the lubricity are further improved.

Embodiment 3 FIG. 3 is a sectional view of only a main part of a sliding contact member according to a fourth invention of claim 4 and a fifth invention of claim 5. The same functions and operations as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. A general steel material that can be heat-treated, such as SCM415, is used, and electroless Ni- is formed on the surface of the base material 1 on which carburizing and tempering are performed.
A P-B plating film 3 is provided, and the Ni-P-B plating film 3 is provided with oil 4 or polytetrafluoroethylene (P
It is impregnated with TFE) 5.

In the third embodiment, as in the first embodiment, the sliding contact members used for the energy storage mechanism, the latch mechanism, the link mechanism and the like of the switching operation device in the switchgear and other switchgear devices operate at high speed. 4 and FIG. 5 on the surface of the base material 1 of the sliding contact member while operating or receiving a high surface load.
The hardness is high, the wear resistance is good, and the lubricity is superior to that of the Ni-P plating film 2.
Ni- which has hardness of about Hv750 even when plated
Since the P-B plating film 3 is provided, the base material 1 is less likely to wear. Moreover, the corrosion resistance over time is Ni-P-
B plating film 3 is also relatively good, but oil 4 or polytetrafluoroethylene (PTFE) 5 is added to Ni.
Since the -P-B plating layer 3 is impregnated, the corrosion resistance is improved and the lubricity is improved.

Further, since the above-mentioned heat treatment is only a plating process, the hardness of the base material 1 can be lowered even when a general steel material subjected to heat treatment such as carburizing is used as the base material. Therefore, corrosion resistance, wear resistance, and lubricity can be imparted, and the surface pressure acting on the sliding contact member can be set high.

The Ni-P plating film 2 and the Ni-P-B plating film 3 in the first to third embodiments described above are used.
Is in the state of being subjected to the plating treatment, but the hardness and wear resistance of the plating film can be changed by performing the heat treatment after the plating treatment as shown in FIGS. 4 and 5.

In the first to third embodiments described above, the carburizing material of SCM415 is used as the base material. However, the type of the base material and the heat treatment method are the conditions of the surface load acting on the sliding contact member, etc. It goes without saying that the selection may be made according to

Further, the sliding contact member in the present invention is a member having a sliding contact portion which is in relative sliding contact with the engaging portion, the sliding portion, the rotating portion and the like.

[0034]

According to the opening / closing operation device of the first invention,
High hardness, good wear resistance, lubricity and corrosion resistance
Since it uses a sliding contact material with high performance, maintenance is required.
To maintain good operating characteristics for a long time.
You can Further, the sliding contact member is heat treated after plating.
Since hardness of about Hv750 can be obtained without performing,
It does not reduce the hardness of the contact members and
It is possible to use a sliding contact member made of a valuable material.
The strike can be reduced.

According to the sliding contact member according to the second invention and the third invention, the Ni-P-B plating film provided on the surface of the base material has high hardness, good wear resistance, and lubricity of Ni. -P
Better than plating film, Hv7
Since it has a hardness of about 50, it is possible to enhance the wear resistance of the base material, and moreover, Ni-P-B plating
The Ni-P plating film provided as the base of the film is Hv50
Hardness of 0 to 550 and high corrosion resistance over time
Therefore, as a whole, the corrosion resistance of the base material is maintained for a long period of time.
In addition, the Ni-P- on the surface of the substrate can be
Since the B plating film is impregnated with oil or polytetrafluoroethylene (PTFE) to improve lubricity and corrosion resistance, the corrosion resistance of the base material can be maintained for a long period of time, and it can be used for switching devices such as circuit breakers. When used as a sliding contact member, good operating characteristics can be maintained for a long period of time without performing maintenance. Further, since a hardness of about Hv750 can be obtained without performing heat treatment after plating, the hardness of the base material is not reduced, and an inexpensive material such as a general steel material can be used, and the cost can be reduced.

According to the sliding contact member of the fourth and fifth inventions, the Ni-P-B plating film provided on the surface of the base material has high hardness and good wear resistance, and has Ni lubricity. It is superior to -P plating film and Hv75
Since the hardness of the base material is about 0, the wear resistance of the base material can be enhanced, and moreover, the Ni-P on the surface of the base material can be improved.
-B plating film is impregnated with oil or polytetrafluoroethylene (PTFE) to improve lubricity and corrosion resistance, so the corrosion resistance of the base material can be maintained for a long time, and switchgear such as circuit breaker. When used as a sliding contact member, it is possible to maintain good operating characteristics for a long period of time without performing maintenance. Further, since a hardness of about Hv750 can be obtained without performing heat treatment after plating, the hardness of the base material is not reduced, and an inexpensive material such as a general steel material can be used, and the cost can be reduced.

According to the circuit breaker of the sixth invention and the seventh invention , since the sliding contact member having high hardness and good wear resistance and high lubricity and corrosion resistance is used, maintenance is not performed. Good operating characteristics can be maintained for a long period of time. Further, since the sliding contact member can obtain a hardness of about Hv750 without being subjected to heat treatment after plating, the sliding contact member is formed of an inexpensive material such as general steel without lowering the hardness of the sliding contact member. It can be used and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of only a main part of a sliding contact member according to the present invention, which has been subjected to a process of a first embodiment.

FIG. 2 is a cross-sectional view of only a main part of the sliding contact member according to the present invention, which has been processed according to the second embodiment.

FIG. 3 is a cross-sectional view of only a main part of the sliding contact member according to the present invention, which has been subjected to the process of the third embodiment.

FIG. 4 is a diagram showing a relationship between a heat treatment temperature and hardness of Ni-P-B plating and Ni-P plating.

FIG. 5 is a diagram showing a relationship between a heat treatment temperature and a wear amount of Ni-P-B plating and Ni-P plating.

FIG. 6 is a cross-sectional view of only a main part of a conventional sliding contact member.

FIG. 7 is a plan view of another conventional sliding contact member.

8 is a vertical cross-sectional front view of the sliding contact member of FIG.

9 is a vertical cross-sectional side view in which only a main part with the sliding contact part of FIG. 7 is enlarged.

FIG. 10 is a sectional view of only a main part of a sliding contact member of another conventional example.

[Explanation of symbols]

1 base material, 2 Ni-P plating film, 3 Ni-P-B
Plating film, 4 oil, 5 polytetrafluoroethylene.

Claims (7)

(57) [Claims] 1. A Ni-P plating film is formed on the surface of a base material having a sliding contact portion which is in sliding contact with the Ni-P plating film, and the Ni-P plating film is formed on the Ni-P plating film.
-Check that a sliding contact member with a B plating film is provided.
A characteristic opening / closing device . 2. A base material having a sliding contact portion which is in sliding contact with each other.
There is a Ni-P plating film on the surface, and Ni-P on it
A sliding contact member having a -B plating film, wherein the Ni-P-B plating film is impregnated with oil. 3. A base material having a sliding contact portion that relatively slides
There is a Ni-P plating film on the surface, and Ni-P on it
There is -B plating film, characterized in that the Ni-P-B plating film polytetrafluoroethylene are impregnated
And sliding contact member. 4. A sliding contact member characterized in that a Ni-P-B plating film is formed on the surface of a base material having a sliding contact portion that is in relative sliding contact, and this is impregnated with oil. 5. A sliding contact member characterized in that a Ni-P-B plating film is provided on the surface of a base material having a sliding contact portion which is in relative sliding contact, and this is impregnated with polytetrafluoroethylene. 6. A circuit breaker characterized in that the sliding member according to any one of claims 2 to 5 is provided in the opening and closing device. 7. An opening / closing operation device according to claim 1 is used.
Circuit breaker characterized by and.