JP3274050B2 - Driving force transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving force transmission device provided in, for example, a power switch for transmitting a driving force from an operation mechanism to a movable member such as a movable electrode.

[0002]

2. Description of the Related Art FIG. 11 is a sectional view showing an example of a conventional power switch (vacuum circuit breaker). A vacuum switch tube 2 is fixed to a support 1 made of an insulating material. A fixed electrode 3 is fixed to an upper portion inside the vacuum switch tube 2. The movable electrode 4 as a movable member that comes into contact with and separates from the fixed electrode 3 is
It is provided to be able to move up and down in the vacuum switch tube 2. The movable electrode 4 is screw-coupled to the insulating rod 5, and a nut 4a is provided at the joint.

The supporting member 1 is provided with a turning member 6 which can turn around a support shaft 6a. An insulating rod 5 is provided at one end of the turning member 6 via a contact pressure spring 7. Are linked. The rotating member 6 is urged by a spring 8 in a direction in which the movable electrode 4 is separated from the fixed electrode 3. The support 1 has
A stopper 1a for restricting the downward movement of the movable electrode 4 is formed. A roller 9 is rotatably attached to the other end of the rotating member 6. The roller 9 is pressed by an output lever 10 as a pressing member that is rotated by a driving force of an operation mechanism (not shown).

Next, the operation will be described. In the open state as shown in FIG. 11, there is no output from the operating mechanism,
The movable electrode 4 is pulled downward by the spring force of the spring 8. At this time, almost no force acts on the output lever 10 and the roller 9, and the distance x between the electrodes in the vacuum switch tube 2 is set by the stopper 1a. For this reason,
A slight gap may be provided between the output lever 10 and the roller 9 in the open state.

When the operating mechanism is driven from this state,
The output lever 10 presses the roller 9 by the driving force,
The turning member 6 is turned against the spring 8. As a result, the insulating rod 5 and the contact pressure spring 7 are pushed upward, and the movable electrode 4 contacts the fixed electrode 3. At this time, if the rotation stroke of the output lever 10 cannot be adjusted because it is constant, the output lever 10 has a stroke sufficient to move the distance x between the electrodes and the compression amount y ₁ -y ₂ of the contact pressure spring 7. However, the compression amounts y ₁ -y ₂ are not stable due to variations in component accuracy, escape or bending of components, and assembly errors due to engagement at the link portions. Therefore, the insulating rod 5
The L dimension is adjusted by tightening the nut 4a that fixes the upper part of, so that y ₁ -y ₂ falls within a certain range.

[0006]

In the conventional power switch constructed as described above, it is necessary to adjust the L dimension by tightening the nut 4a, so that the compression amount of the contact pressure spring 7 is adjusted. However, depending on the structure, adjustment of the L dimension cannot be performed unless assembly is performed once, which requires a large amount of adjustment time. In particular, since the power switch has three vacuum switch tubes 2, three times the adjustment time is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a driving force transmitting device capable of simplifying a stroke adjustment operation and shortening the adjustment time. Aim.

[0008]

According to a first aspect of the present invention, there is provided a driving force transmission device comprising: a rotating member rotatable around a support shaft;
A movable member that is connected to the rotating member and reciprocates by the rotation of the rotating member, a pressing member that presses and rotates the rotating member, and a rotating member that contacts the outer peripheral surface with the pressing member. An eccentric roller that is rotatably mounted and that allows the distance from the center of rotation to the outer peripheral surface with which the pressing member abuts to be selectable by rotation.

According to a second aspect of the present invention, there is provided a driving force transmitting device.
It is provided with a spring for urging the rotating member in a direction opposite to the pressing direction by the pressing member.

The driving force transmission device according to the third aspect of the present invention
An eccentric roller having a polygonal outer peripheral shape is used.

According to a fourth aspect of the present invention, there is provided a driving force transmission device.
The eccentric roller is attached to a rotating member via a spherical free bearing.

The driving force transmitting device according to the invention of claim 5 is
The outer peripheral surface of the eccentric roller is curved in the thickness direction of the eccentric roller.

[0013]

[0014]

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a cross-sectional view of an open state of a power switch according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of a closed state of FIG. 1, and the same or corresponding parts as FIG. 11 and FIG. The same reference numerals are given and the description is omitted.

In FIG. 1, an eccentric roller 11 is rotatably attached to the end of the rotating member 6 on the side pressed by the output lever 10. As shown in FIGS. 3 and 4, the eccentric roller 11 has a polygonal outer peripheral shape (here, a hexagon), and the distance from the center of rotation to each outer peripheral surface with which the output lever 10 comes into contact is α. Is different.
Other configurations are the same as those in FIG. 11 and FIG.

Next, the operation will be described. When the compression amount y ₁ -y ₂ of the contact pressure spring 7 in the closed state as shown in FIG. 2 is not within the predetermined range, the output from the operating mechanism is eliminated and the state shown in FIG. 1 is obtained. Then, the rotating member 6 is rotated in the counterclockwise direction in the figure to separate the eccentric roller 11 from the output lever 10. As a result, the eccentric roller 11 becomes rotatable, and the outer peripheral surface of the eccentric roller 11 with which the output lever 10 abuts is changed by rotation. That is, when the compression amount y ₁ -y ₂ is small, the eccentric roller 11 moves in a direction in which the distance from the rotation center increases, and when the compression amount y ₁ -y ₂ is large, the eccentric roller 11 moves in a direction in which the distance from the rotation center decreases. To rotate.

In such a device, the amount of compression y ₁ of the contact pressure spring 7 can be reduced by a simple operation of rotating the eccentric roller 11.
The -y ₂ can be adjusted easily and within a predetermined range in a short time. In addition, by setting α in FIG. 3 to, for example, 1 mm, it is possible to carry out digitally while grasping numerically the adjustment amount of the compression amount y ₁ −y ₂ . Further, if the gap between the output lever 10 and the eccentric roller 11 in the opened state is smaller than the dimension b in FIG. 3, the eccentric roller 11 does not rotate freely by a normal operation, and the once set outer circumference The face does not change.

When it is necessary to set a more precise dimension, the above-mentioned α may be reduced, and the compression amount y ₁
When the variation range of −y ₂ is large, the number of polygons may be increased.

Also, the outer peripheral shape of the eccentric roller may be circular, whereby the distance from the center of rotation to the outer peripheral surface can be continuously adjusted. However, in this case, a mechanism for locking the rotation of the eccentric roller is required so that the once set distance does not change in the normal operation.

Embodiment 2 FIG. Next, a second embodiment of the present invention will be described. As shown in FIG. 5, in the first embodiment, since the output lever 10 is disposed at a right angle to the rotating member 6, when the output lever 10 is not horizontal, only the edge of the outer peripheral surface of the eccentric roller 11 And the output lever 10 is engaged. On the other hand, in the second embodiment, as shown in FIG. 6, an eccentric roller 13 is attached to the rotating member 6 (similar to FIG. 1) via a spherical free bearing 12.

With this configuration, the eccentric roller 13 is inclined according to the angle of the output lever 10, the contact surface between the output lever 10 and the eccentric roller 13 is secured, the driving force is smoothly transmitted, and the eccentric roller 13 Is prevented from being worn or crushed.

Embodiment 3 FIG. In the second embodiment, the spherical free bearing 12 is used. However, for example, as shown in FIGS. 7 and 8, even when the eccentric roller 14 whose outer peripheral surface is curved in the thickness direction is used, the driving force can be reduced. Smooth transmission can be made possible.

Here, when manufacturing the eccentric rollers 11, 13 and 14 as shown in the first to third embodiments, FIG.
If it is manufactured by forging using a mold divided along the line a-a, it can be manufactured easily and inexpensively.

Embodiment 4 Next, FIG. 9 is a cross-sectional view of a power switch according to Embodiment 4 of the present invention in an open state, and FIG. 10 is a cross-sectional view of FIG. 9 in a closed state. In the drawing, the stopper 1 of FIG.
An opening 1b is provided instead of a. An eccentric roller type stopper 21 is rotatably provided in the opening 1b. The eccentric roller-type stopper 21 has a polygonal outer shape (here, a hexagon), and a moving portion that moves with the movable electrode 4 from the center of rotation, here, a connecting portion between the insulating rod 5 and the rotating member 6. The distances to the respective outer peripheral surfaces that contact each other are different. Another configuration is shown in FIG.
And FIG.

In such an apparatus, by rotating the eccentric roller type stopper 21, the distance between the electrodes when the electrode is opened can be easily adjusted. In the examples of FIGS. 9 and 10, the lower end of the opening 1b is closed by the surface on which the support 1 is installed, and at the same time, the rotation of the eccentric roller type stopper 21 is restricted. 21 does not rotate on its own.

A mechanism for locking the rotation of the eccentric roller type stopper 21 may be additionally provided. In this case, the outer peripheral shape of the eccentric roller type stopper 21 is made circular to continuously adjust the distance between the electrodes. It is also possible to do.

Further, in each of the above embodiments, the driving force transmission device in the power switch has been described, but the present invention can be applied to the driving force transmission device of other devices.

[Brief description of the drawings]

FIG. 1 is a sectional view of a power switch according to Embodiment 1 of the present invention in an open state.

FIG. 2 is a sectional view of FIG. 1 in a closed state.

FIG. 3 is a front view showing the eccentric roller of FIG. 1;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a schematic perspective view showing an arrangement state of an eccentric roller and an output lever of FIG. 1;

FIG. 6 is a sectional view of an eccentric roller according to Embodiment 2 of the present invention.

FIG. 7 is a front view showing an eccentric roller according to Embodiment 3 of the present invention.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a cross-sectional view of a power switch according to Embodiment 4 of the present invention in an open state.

FIG. 10 is a cross-sectional view of FIG. 9 in a closed state.

FIG. 11 is a cross-sectional view showing an example of a conventional power switch in an open state.

FIG. 12 is a cross-sectional view of FIG. 11 in a closed state.

[Explanation of symbols]

Reference Signs List 4 movable electrode (movable member), 6 rotating member, 6a support shaft, 10 output lever (pressing member), 11, 13, 14
Eccentric roller, 12 spherical free bearing, 21 eccentric roller type stopper.

Continuation of the front page (56) References JP-A-7-122163 (JP, A) JP-A-7-320604 (JP, A) JP-A-61-230280 (JP, A) JP-A-5-41040 (JP) , U) Shokai 56-114031 (JP, U) Shokai 4-111129 (JP, U) Shogun 61-36035 (JP, Y2) (58) Fields surveyed (Int. Cl. ⁷ , DB) Name) H01H 33/66 H01H 33/42

Claims (5)

(57) [Claims] A rotating member rotatable about a support shaft, a movable member connected to the rotating member, and reciprocating by the rotation of the rotating member; A pressing member to be rotated, and a rotatable attachment to the rotating member such that the pressing member abuts on an outer peripheral surface, and a distance from a center of rotation to an outer peripheral surface with which the pressing member abuts is selected by rotation. A driving force transmitting device, comprising: an eccentric roller which is enabled. 2. The driving force transmission device according to claim 1, further comprising a spring for urging the rotating member in a direction opposite to a direction in which the pressing member presses the rotating member. 3. The driving force transmission device according to claim 1, wherein the eccentric roller has a polygonal outer peripheral shape. 4. An eccentric roller is attached to a rotating member via a spherical free bearing.
A driving force transmission device as described in the above. 5. The driving force transmission device according to claim 3, wherein an outer peripheral surface of the eccentric roller is curved in a thickness direction of the eccentric roller.