JPS6020253Y2 - Operation axis of electrical equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating shaft for electrical equipment, and more specifically,
The present invention relates to an operation shaft rotatably attached to a box frame, which is useful when used in electrical equipment such as a circuit breaker in which a plurality of switches are operated in conjunction with each other.

Usually, in a circuit breaker as an example of the electrical equipment according to the present invention, as shown in FIGS. 1 and 2, a plurality of switches 2 are erected on a box frame 1, and each switch 2
The mechanism for operating the box frame 1 is mounted inside the box frame 1.

That is, the operating shaft 4 is horizontally supported on side walls 3.degree. 3 of the box frame 1, which are opposed to each other, and is rotatably supported while being restricted from moving in the axial direction.

A plurality of sets of paired bell crank-shaped levers 5 are integrally attached to the operating shaft 4 at positions corresponding to the respective switches 2, and one end of each set of levers 5 (as shown in FIG. The lower end of the operating rod 6 of each switch 2 is pivotally attached via a pin 7 to the upper end).

Further, on one end side of a suitable lever 5, the upper end of an operation link 11 of a closing link mechanism 10 which is mounted on the bottom wall 8 and is operated by an electromagnet 9 is pivotally connected via a pin 12.

At the other end of a suitable one of the plurality of sets of levers 5,
Shutoff spring 13 (in this embodiment, the levers 5 on both sides
This shows the case where it is installed.

) is appropriately attached, and the other end of each cutoff spring 13 is appropriately fixed to a side wall 14 adjacent to the side walls 3, 3 to which the operating shaft 4 is mounted.

Further, the other end of an L-shaped lever 16 having a display plate 15 attached to one end for displaying opening/closing operations is pivotally connected to the other end of the appropriate lever 5 via a rod 17.

The L-shaped lever 16 is rotatably inserted into its bent portion and is supported by support rods 18 attached to the side walls 3, 3, and the side wall 19 corresponding to the display plate 15 In the figure, a window 20 is cut out.

A lever 21 for an auxiliary switch is integrally attached between the levers 5, and an operating link 23 of an auxiliary switch 22 attached to a side wall 19 provided with a window 20 is connected to a pin 24. It is pivotally connected via.

Therefore, the closing link mechanism 10 or the cutoff spring 1
3 is operated, each switch 2 is opened and closed in synchronization.

In addition, 25 is a shaft hole bored in the side walls 3, 3, into which a shaft bearing member 27 such as a bearing fitted into the small diameter portion 26 formed at both ends of the operating shaft 4 is fitted, and 28 is a shaft hole bored in the side walls 3, 3. These are wheels for making the frame 1 movable.

However, when attaching the operating shaft 4 to the box frame 1, since the aforementioned lever 5.21 and the like are integrally attached to the operating shaft 4 in advance, the shaft hole 25 of the side walls 3,
Since the operating shaft 4 cannot be inserted from the box frame 1, the side wall 3 of the box frame 1 should be configured to be detachable from the bottom wall 8 as shown in FIG.
The structure had to be divided into two parts.

Therefore, there are problems in that the rigidity of the box frame 1 itself is reduced and that assembling the box frame 1 requires a great deal of time and effort.

Further, when performing maintenance and inspection of the shaft bearing member 27 that rotatably supports the operating shaft 4, there is a rather troublesome problem in that the side wall 3 must be removed from the bottom wall 8 and the like.

The present invention was created in view of the above-mentioned problems, and its purpose is to provide an operating axis for electrical equipment that is easy to install on a point frame and easy to maintain and inspect. One embodiment of the lever device will be described in detail.

FIG. 3 is an exploded view of an operating shaft 30 according to the present invention that is attached to a box frame 29 of an electrical device such as a circuit breaker.
An insertion hole 3 is provided at the same length as the interval of 1, and the axial center of the hole 3 is provided with an insertion hole 3 into which a support rod to be described later is inserted.
2 is drilled through the hole.

Although not shown, various levers as described above are integrally attached to the operating shaft 30, and the earthen wall (not shown), which is one side of the box frame 29, is an internal wall (not shown). It is detachably installed so that maintenance and inspection of the equipment can be performed.

At both ends of the insertion hole 32 of the operating shaft 30, large diameter portions 33 having a larger diameter than the insertion hole 32 are formed, and each large diameter portion 33 has a bearing member 34 such as a roller bearing or a bushing. It has interior decoration.

A support rod 36 inserted into the insertion hole 32 is rotatably supported in each bearing member 34 via a bearing member 35 such as an inner ring or bush of a roller bearing fitted near both ends thereof.

Note that this bearing member 36 is fitted into small diameter portions 37 formed at both ends of the support rod 35, and its inner end abuts against a locking stepped portion 38 formed by providing the small diameter portion 37. and the outer diameter of the bearing member 36 is
The outer diameter of the support rod 35 is appropriately larger than the outer diameter of the support rod 35 .

In addition, the inner ends of the bearing members 34 installed at both ends of the operating shaft 30 are similar to the bearing members 36 fitted to the support rod 35.
Locking step portion 3 formed by providing large diameter portion 33
It is in contact with 9.

The support rod 35 is provided longer than the operating shaft 30, so that the tips of the small diameter portions 37 at both ends thereof are connected to the operating shaft 3.
a support bracket 4 protruding from the insertion hole 32 of 0 and detachably attached to the opposing side wall 31;
0 is fitted and supported.

That is, on the side walls 31 facing each other, the side walls 31 shown in FIGS.
As shown in the figure, a hole 4 larger than the outer diameter of the bearing member 36 fitted in the small diameter portion 37 at both ends of the support rod 35
1 is drilled therein, and around the number hole 41, a plurality of female screw holes 42 are drilled into which bolts that can fix the support bracket 40 to the side wall 31 are screwed, as will be described later.

The support bracket 40 is provided in the hole 41 so as to be freely engageable and detachable via an integrally protruding engaging protrusion 43 .

The body of the support bracket 40 is provided with a shaft hole 44 which is concentric with the engagement protrusion 43 and into which the small diameter portion 37 of the support rod 35 is inserted, and which is screwed into the female screw hole 42. A plurality of holes 46 are drilled into which bolts 45 to be inserted are inserted.

Note that the hole 46 is provided with a diameter slightly larger than the diameter of the bolt 45, and 47 is a spring washer.

Further, the height of the engaging protrusion 43 is set to be approximately the same as the thickness of the side wall 31.

With the above configuration, the operation shaft 30 is connected to the box frame 29.
To install the operating shaft 3, first, the shaft bearing members 34 are installed at both ends of the insertion hole 32, the inner ends are brought into contact with the locking steps 39, and various levers (not shown) are integrally attached.
0 is housed in a box frame 29, and various levers and various devices (not shown) mounted in the box frame 29 are connected as appropriate.

Next, both ends of the operating shaft 30 were brought to positions corresponding to the holes 41 bored in each of the opposing side walls 31, and the support rod 35 was inserted through one hole 41 into the insertion hole 32 of the operating shaft 30.
Insert into.

Then, the bearing member 36 is fitted into the small diameter portions 37 at both ends of the support rod 35, and its outer circumferential surface is engaged with the inner circumferential surface of the bearing member 34 installed in the operating shaft 30, and the inner end is connected to the locking step. 38.

At this time, since the outer diameter of the bearing member 36 fitted into the support rod 35 is smaller than the hole 41, there is no possibility that the hole 41 and the bearing member 36 will interfere with each other.

Next, the small diameter portion 37 of the support rod 35 protruding from the operating shaft 30 is inserted into the shaft hole 44 of the support bracket 40, and the engagement protrusion 43 of the support bracket 40 is inserted into the side wall 3.
When the supporting bracket 40 is fitted into the hole 41 of No. 1 and fixed to the side wall 31 with a plurality of bolts 45, the attachment of the operating shaft 30 to the box frame 29 is completed.

Note that, in order to remove the operating shaft 30 from the box frame 29, the procedure described above may be reversed.

As described above, the present invention provides an insertion hole in the axial center of the operating shaft, which is housed in a frame to which a lever etc. is integrally fixed in advance, and also provides a bearing member at both ends of the insertion hole. a support rod fitted with a shaft bearing member that is longer than the operating shaft and can be freely engaged with the shaft bearing member is inserted into the insertion hole, and both ends of the support rod are bored into opposing side walls of the box frame. The shaft bearing member is inserted into a hole having a larger diameter than the shaft bearing member fitted to the supporting rod, and is also fitted into a support bracket detachably attached to each of the side walls. This eliminates the need for the side walls that support both ends of the operating shaft to be removable, allowing the box frame itself to be made highly rigid, and making it easier and faster to install the operating shaft. be able to.

In addition, maintenance and inspection of the bearing member that supports the operating shaft can be easily done by removing the support bracket from the side wall.Furthermore, maintenance and inspection of various devices mounted inside the box frame can be easily carried out. for,
Since the operating shaft can be freely moved by pulling out the support rod, the operation can be easily performed.

Note that the frame is not limited to a box frame, but may be any opposing frame.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are a front cross-sectional view and a side cross-sectional view showing the outline of a conventional electric device, respectively, and FIG. 3 is an operation diagram according to the present invention. Exploded assembly diagram showing the state of assembly of the shaft to the box frame, No. 4
The figure is an enlarged sectional view of the main part. 5...Lever 29...Box frame, 30...Operation shaft, 31...Side wall, 32...Insertion hole, 34... ...Bearing member, 35...Support rod, 36...Bearing member, 40...Support bracket, 41...
...hole.

Claims (1)

[Scope of utility model registration request] An insertion hole 32 is bored and provided in the axial center of an operating shaft 30 to which a lever 5 etc. is integrally fixed in advance and housed in a frame, and a bearing member 34 is internally provided at both ends of the insertion hole 32. , a support rod 35 fitted with a shaft bearing member 36 that is longer than the operation shaft 30 and can be freely engaged with the shaft bearing member 34 is inserted into the insertion hole 32, and both ends of the support rod 35 are inserted into the opposing side walls of the frame. A hole 4 having a larger diameter than the bearing member 36 fitted to the support rod 35 is bored in the hole 31.
1. An operating shaft for an electrical device, characterized in that the operating shaft is inserted into a support bracket 40 which is inserted into the support bracket 40 and which is detachably attached to each of the side walls 31.