JPS6223003Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a speed adjustment device, and more specifically, to a speed adjustment device for a shredder cutter, etc. equipped with an operating mechanism for performing each of the closing and cutting operations. It is something.

Generally speaking, in order to reduce the operational impact during closing and cutting operations,
A speed adjusting device is provided to adjust the operating speed of an operating rod (such as a piston rod) in each operating section, but conventionally, this speed adjusting device has been separately provided for each operating section. The reason for this is that the speed adjustment range required for each operating section is different, and it was thought that the same speed adjustment device could not perform the adjustment. As a result, the equipment has become larger, hindering its ability to be made more compact, and has had to be manufactured, assembled, adjusted, installed, etc. separately, resulting in extremely poor workability.

This invention was developed in view of the problems of the prior art described above, and it is possible to adjust the speed of two types of operating mechanisms with different speed adjustment ranges, such as the closing operation and the cutting operation of a shear cutter. The purpose is to enable this to be done with a single speed adjustment device. Hereinafter, embodiments of this invention will be described in detail with reference to the drawings.

What is shown in FIG. 1 is a breaker 2 equipped with a speed regulating device 1 according to the invention, a driving device 3, etc. for each breaker 2 (in the case of three phases). ) is operatively connected to a drive rod 6 of a drive device 3 via a bell crank-shaped link portion 5. Further, an operating rod (piston rod) 7 in the speed adjusting device 1 is connected to a driving rod 6 via a connecting member 8 on the same axis. In addition, in this embodiment, when the drive rod 6 is extended to the left in the figure, each arm and the disconnector 2 are
The link portion 5 is configured such that when the VI (vacuum interrupter) 9 is closed and the drive rod 6 is contracted to the right in the figure, the VI 9 of each shaft disconnector 2 is closed. There is.

The configuration of the speed adjusting device 1 is shown in FIG. 2, for example.
It is constructed as shown in FIG. In addition, although FIG. 2 shows a side cross section, in the figure,
The cross section above the axis of the actuating rod 7 shows a sectional view at a position where the shear cutting operation is completed, and the cross section below the axis shows a cross sectional view at a position where the closing operation is completed. In the figure, reference numeral 10 indicates a cylinder body into which a piston rod 7 is inserted so as to be freely movable in the axial direction, and a member 11 on the front side (right side in the figure) and a member 12 on the rear side are connected via a connecting bolt 13. This constitutes the cylinder 14.

The piston rod 7 is slidably supported by a bearing member 15 attached to the member 11, and is also slidably supported in a sealed manner via a plurality of seal members 16, 17, and 18. The inner end of the piston rod 7 is formed into a small diameter part 19 which is one step smaller in diameter, and a piston 20 is fitted into this small diameter part 19 so as to be movable in the axial direction. That is, the small diameter portion 19
is formed to have an appropriate length, and the piston 20 is
It is mounted movably in the axial direction between the stepped portion 21 and a nut member 23 screwed onto a threaded portion 22 provided at the inner end of the piston rod 7. The piston 20 is located within the cylinder body 10, and the member 1
The bearing member 24 is slidably attached to an inner wall 25 of an internal cylinder 24 provided between the bearing member 2 and the bearing member 15 via a sealing member 26 such as an O-ring. The piston 20 is installed inside the internal cylinder 24 so as to be able to move freely in the front and rear directions within the cylinder chamber 27. The internal cylinder 24, in which the piston 20 comes into sliding contact, has a communication hole (orifice) that communicates with the inside of the external oil chamber 28. ) 29 are provided. The communication holes 29 are arranged at appropriate intervals, and in this embodiment, the diameter of the communication holes 29 gradually increases from the front toward the rear. A bypass passage 30 is formed at the rear of the internal cylinder 24 to minimize the resistance to oil flow after contact is made, and the bypass passage 30 communicates with bypass communication holes 31 and 32. There is.

The reference numeral 33 indicates a member attached to the bearing member 15 by screwing or other means between the bearing member 15 and the piston 20, and a part of the member projects from the bearing member 15. A plate-shaped valve 34 is fitted into the outer diameter portion so as to be movable in the axial direction.
The valve 34 opens the external oil chamber 28 provided in the bearing member 15 by moving the protruding outer diameter portion of the member 33.
It is for opening and closing a communication passage 35 between the member 33 and the cylinder chamber 27, and its movement is restricted to a certain amount by a flange portion 36 provided on the member 33.
Note that reference numeral 37 indicates an oil filler port, and 38 indicates a plug for the oil filler port 37, and an appropriate amount of oil 39 is injected into the cylinder chamber 27 and the external oil chamber 28 through the oil filler port 37. ing.

In the above configuration, the operation of this invention will be explained. First, let me explain about the charging operation.
Since the closing operation is performed by driving the drive rod 6 to the left via the drive device 3, the piston rod 7 of the speed adjusting device 1 is also moved to the left. At this time, the piston rod 7 starts the closing operation from the so-called shrunken state shown in FIG.
That is, since the piston 20 is not operated until the stepped portion 21 of the piston rod 7 comes into contact with the piston 20, the oil resistance is extremely small during this time, so the piston rod 7 is moved at a high speed.

When the stepped portion 21 of the piston rod 7 comes into contact with the piston 20 as shown in FIG.
moves to the left while being resisted by the oil flow in the left cylinder chamber 27, but at this time the oil flow also becomes turbulent, and as the piston 20 passes through the orifice 29, the resistance increases. The moving speed of the piston rod 7, that is, the closing speed is reduced and controlled.
When the piston 20 is moved to the vicinity of the position shown in FIG. 6, the VI9 contacts of the shield breaker 2 come into contact with each other, but at this time, as shown in the figure, the bypass passage 30 and the communication hole 31 is opened, the oil in the left cylinder chamber 27 flows through the bypass passage 30 and the communication hole 3.
1 and is returned to the right cylinder chamber 27, and the resistance of the oil flow to the movement of the piston 20 is drastically reduced. Therefore, the moving speed of the piston rod 7 increases, and the contact point of VI9 is quickly brought into pressure contact, and the closing operation is completed at high speed while the pressure contact spring and the bending spring (both not shown) are charged with energy. (Figure 7).

As described above, during the closing operation, only the piston rod 7 is moved at the beginning of the operation to minimize oil resistance, and when the moving speed of the piston rod 7 reaches a certain initial speed, the piston 20 is moved. Once it starts operating, the speed can be controlled by the resistance of the oil to gently bring the contacts of VI9 into contact. Furthermore, after the contacts have made contact, the resistance of the oil is extremely reduced again, allowing the pressure welding process to be carried out quickly. Also,
Since the piston 20 is operated by the piston rod 7 whose initial speed is accelerated, the driving force may be extremely small.

Next, the shearing operation will be explained, but the shearing operation must be performed at approximately twice the speed of the closing operation. In this device, during the initial operation when the shearing operation is performed, the seventh
As shown in FIG. 8, until the nut member 23 comes into contact with the piston 20, only the piston rod 7 moves and the piston 20 does not move at all, and the resistance to the movement of the piston rod 7 is 0. The disconnection operation is carried out quickly. When the nut member 23 comes into contact with the piston 20, the piston 20 is moved to the right, but in this case as well, the oil resistance is extremely small while passing through the bypass passage 30, and therefore the piston 20 is moved at high speed. A disconnection operation will be performed. That is, during the shearing operation, the speed adjustment device 1 at the initial and middle stages of the operation
There is almost no resistance, and the cutting occurs at high speed. As the piston 20 begins to pass through the orifice 29 as shown in FIG. increases, and the speed at the end of the shearing operation is controlled.

As described above, according to this invention, the speed adjusting device 1 constituted by one cylinder 14 allows
Since it is possible to buffer (control) two different types of operations in each speed adjustment area, for example, the closing operation and the closing operation, the entire device can be made more compact.
In addition, since only one speed adjusting device 1 is required, manufacturing, assembly, adjustment, installation, etc. operations are extremely simple compared to the conventional separate installation method, and work performance can be greatly improved. In addition, the input operation,
At the beginning of the operation during the cutting operation and during the pressing operation during the closing operation, the operation is accelerated to a constant initial speed, so the drive is faster than in the conventional technology in which the piston is fixed to the piston rod. It requires only a small amount of force, which is not only economical, but also allows the drive unit to be made more compact. The operating characteristic curve A of this invention having the above-mentioned functions and effects is shown in FIGS. 10 and 11 as an ideal curve B and as a curve C in the prior art.
As shown in FIG. 10, during the closing operation, as shown in FIG. 10, an operation very close to the ideal curve is obtained. Note that the horizontal axis indicates the closing time t ₁ , and on the vertical axis, L ₁ indicates the operating stroke up to contact touch, and L ₂ indicates the operating stroke during pressure contact. In addition, the origin 0 indicates the cutting position, and the symbols a, b, c, d shown in the figure
are shown in Figures 4, 5, 6 and 7, respectively.
It shows the operating characteristics at the position shown in the figure. During the shearing operation, as shown in FIG. 11, it can be seen that excellent characteristics are exhibited, particularly in the early and middle stages of the shearing operation. In addition,
The horizontal axis shows the shearing time t ₂ and the vertical axis shows L ₃
indicates the operating stroke until the contact touch is released, and _L4 indicates the operating stroke until the contact is broken. In addition, the 0 point indicates the input position, and the symbols e, f, g, and h shown in the figure are the 7th point, respectively.
9 shows the operating characteristics at the positions shown in FIG. 8, FIG. 9, and FIG. 4.

FIG. 12 shows another embodiment of the main part of this invention, in which the space between the intermediate groove 40 of the bearing member 15 provided between the seal members 16 and 17 and the external oil chamber 28 is shown. , are configured to communicate with each other via a hole 41. In this case, even if a high hydraulic pressure is applied to the seal member 16 and the oil reaches the intermediate groove 40 through the seal member 16, the oil is returned to the external oil chamber 28 through the extraction hole 41, so the seal member 17 has a high oil pressure. No hydraulic pressure is applied. Therefore, even if unexpected hydraulic pressure acts on the seal member 16, there is an effect that oil does not pass through the seal member 17 and leak to the outside.

Note that changes made to the structure of this invention without departing from its functions and effects also belong to this invention.

[Brief explanation of the drawing]

FIG. 1 is a simplified explanatory diagram of a shingle breaker equipped with a device according to this invention, FIG. 2 is a side sectional explanatory diagram of a main part of this invention, and FIG. 3 is a front view of a part thereof. Figures 4, 5, 6, 7, 8 and 9 are explanatory diagrams showing the operating state of the main parts of this invention, and Figures 10 and 11 are the main points of this invention. FIG. 12 is a side sectional explanatory view showing another embodiment of the main part of this invention. 7... Operating rod, 20... Piston, 27... Cylinder chamber, 30... Bypass passage.

Claims (1)

[Claims for Utility Model Registration] A speed adjustment device for adjusting the operating speed of the closing or disconnecting operation of an electric shield breaker, comprising: a cylinder body 10; an internal cylinder 24 provided inside the cylinder body 10; , the inner cylinder 24 and the end of the cylinder body 10 are connected to the front part member 1 to which the rear part member 12 and the bearing member 15 are attached.
1, the cylinder chamber 27 and external oil chamber 28 formed by closing the cylinder chamber 27 and the external oil chamber 28, the operating rod 7 through which the bearing member 15 is slidably inserted into the cylinder chamber 27, and the end of the operating rod 7 inside the cylinder chamber 27. a piston 20 slidably inserted into the section by a distance corresponding to the initial section length of the closing or cutting operation of the operating rod 7;
The external oil chamber 2 is provided in the internal cylinder 24.
8 and communicates with the oil in the cylinder chamber 27 and the external oil chamber 2.
8, a communication hole 35 provided on the front member 11 side and communicating the cylinder chamber 27 and the external oil chamber 28, and the communication hole 3
5, a valve 34 that opens when the piston 20 moves toward the rear surface member 12 side and closes when the piston 20 moves toward the front surface member 11 side; A bypass passage 30 having bypass holes 31 and 32 is provided in the piston 20 to circulate the oil compressed in the cylinder chamber 27 to the front member side of the piston 20 when the piston 20 approaches the rear member 12. Characteristic speed adjustment device.