JPS6122693B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exciter, particularly one for use in civil engineering, construction work, etc.

Generally, in civil engineering and construction work, vibration exciters are used to drive or pull out piles, vibrate compacted steel pipes for ground improvement, and the like. In this case, the exciter should be able to efficiently obtain the necessary modes of vibration, as well as eliminate unnecessary It is desirable that the configuration be such that vibration modes are not emitted as much as possible. Furthermore, it is desired that the vibration mode can be freely set, if necessary. For this reason, a type of visually excited exciter exciter has been proposed in the past, which has a plurality of eccentric rotating bodies and whose rotational phase is variably controlled for each rotating body. This is to control the vibration mode, particularly the vibration direction, by individually controlling the rotational phase of each eccentric rotating body. This thing is certainly true in principle,
This is excellent in that a desired vibration mode can be obtained efficiently. Furthermore, since the vibration is generated by the movement of the eccentric rotating body, there is an advantage that the amount of pollution such as noise generated is small.

However, in this type of exciter, at least in the conventional exciter, the mechanism for individually controlling the rotational phase of a plurality of eccentric rotating bodies that each perform rotational motion must be extremely complicated. Despite its excellent construction principles, it lacked concrete means to construct it concisely and rationally.
For this reason, the actual mechanical configuration of conventional exciters is extremely complex, and as the exciters become more complex, the shape of the exciters themselves has to become unnecessarily large, and as a result, civil engineering It was extremely difficult to handle when used on construction sites.

This invention was made in view of the above-mentioned conventional background, and its purpose is to relatively control the rotational phase of each eccentric rotating body in an exciter using a plurality of eccentric rotating bodies. It has a simple and rational structure, so that it can be easily used at civil engineering and construction sites without any difficulty in handling. It is an object of the present invention to provide a specific configuration of a vibrating machine that can efficiently carry out work such as vibrating a compacted steel pipe.

In order to achieve the above object, the exciter according to the present invention includes a first movable part that is swingably supported on the drive shaft, and a gear that is connected to the shaft end of the drive shaft in an equal direction opposite to the drive shaft. A driven shaft that rotates at a high speed, a second movable part swingably supported by the driven shaft, and an eccentric that is located in the first and second movable parts and is pivotally supported on the outer periphery of the drive shaft and the driven shaft, respectively. a rotating body; an eccentric rotating body that is interlocked with the drive shaft and the driven shaft through gears and rotates at a constant speed in a direction opposite to the eccentric rotating body; and the first and second
The movable part of the movable part is rocked in opposite directions about the drive shaft and the driven shaft, respectively, to vary the relative opening angle position of the two, and a locking means for fixing the angle position, and according to the opening angle. The present invention is characterized in that the phase of each eccentric rotating body disposed in the first and second movable parts is set by the following steps.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. Note that common or corresponding parts in each figure are given the same reference numerals.

1, 2, 3 and 4 show an embodiment of the exciter according to the invention. The exciter shown in the figure first includes a first movable part 3 that pivotally supports a pair of eccentric rotors 1 and 2 that are driven to rotate at a constant speed in opposite directions, and , 2 and a second movable part 6 that pivotally supports a pair of eccentric rotating bodies 4 and 5 that are rotationally driven in symmetrical directions. The first and second movable parts 3 and 6 are configured as casings that house the rotating bodies 1 and 2 and 4 and 5, respectively. The first movable part 3 is swingably supported by a drive shaft 1a that passes through the main body case 7 and is supported by a bearing. Further, the second movable part 6 is connected to the main body case 7.
It is swingably supported by a driven shaft 4a which is supported by a driven shaft 4a. The drive shaft 1a and the driven shaft 4a are connected to rotate at a constant speed in opposite directions by a pair of gears 20 and 21 provided at the rear end and the front end, respectively. The eccentric rotating bodies 1, 2, 4, and 5 are constituted by so-called eccentrically supported weights. Each eccentric rotating body 1,
2, 4, and 5 are the drive shaft 1a passing through the first movable part 3, and the movable part 3 at the lower part thereof.
The driven shaft 4a passes through the second movable part 6, and the shaft 5a has both ends supported by the movable part 6 at the lower part thereof. And each eccentric rotating body 1, 2 of the first movable part 3
is a pair of gears 1 provided on the respective shafts 1a and 2a.
8 and 19, thereby rotating at a constant speed in mutually opposite directions as described above. Further, the eccentric rotors 4 and 5 of the second movable part 6 are connected by a pair of gears 22 and 23 provided on the respective shafts 4a and 5a, so that they rotate at constant speeds in opposite directions as described above. Rotate. A driving device 8 such as an electric motor, a worm 9, a pinion 10, shafts 11a, 11
b, small gears 11c, 11d, small gears 12, 13,
and segment gears 14, 15 are provided. The shafts 11a and 11b are small gears 11c and 11d.
are connected to each other by. Segment gears 14 and 15 are fixed to the first and second movable parts 3 and 6, respectively. And the drive device 8
When the small gears 12 and 13 operate, the segment gears 14 and 15 are meshed with each other to drive the first and second gears.
The second movable parts 3 and 6 swing around the drive shaft 1a and the driven shaft 4a, respectively, and their opening angles are rotated within a range of ±45 degrees, that is, 90 degrees, so that the relative angle θ between them is adjusted. Variable. At this time, if the operation of the drive device 8 is stopped when the relative angle θ between the first and second movable parts 3 and 6 reaches a predetermined angle, the worm 9 and the pinion 10 The constructed mechanical irreversible transmission mechanism mechanically fixes the first and second movable parts 3 and 6 at any variably set positions. That is, the worm 9 and pinion 10 constitute a type of locking means. The first and second movable parts 3 and 6 are moved by the segment gears 14 and 15, respectively.
It can be rotated within a range of degrees. Therefore,
The relative angle θ between the two movable parts 3 and 6 is freely variable within the range of ±90 degrees and fixed at an arbitrary angle. Depending on this angle, each eccentric rotating body 1, 2, 3,
Since the relative phase of each eccentric rotating body 1, 2, 3, and 4 changes, it is possible to set the phase of rotation of each eccentric rotating body 1, 2, 3, and 4 due to the rotation of the drive shaft 1a. 1, 2 and 4, 5 are each rotationally driven by an electric motor or a hydraulic device (both not shown). The rotational force from the electric motor or hydraulic system is first transmitted to the drive shaft 1a by the V-belt 16 and pulley 17. At this time, the drive shaft 1a and the driven shaft 2a are the gears 18 and 19.
The two are in mesh with each other so that they rotate in opposite directions. Therefore, first, the pair of eccentric rotors 1 and 2 in the first movable part 3 are driven to rotate at a constant speed in mutually opposite directions. The rotational force received by the drive shaft 1a is transmitted to the gear 20,
21 to the shaft 4a on the second movable part 6 side, and further transmitted to the shaft 5a through gears 22 and 23. As a result, the pair of eccentric rotating bodies 4 and 5, which are pivotally supported by the second movable part 6, are also driven to rotate at a constant speed in opposite directions, similarly to the rotating bodies 1 and 2 of the first movable part 3. be done. At this time, a pair of eccentric rotating bodies 1 and 2 on the first movable part 3 side and a pair of eccentric rotating bodies 1 on the second movable part 6 side
The pair of eccentric rotating bodies 4 and 5 are rotationally driven in mutually symmetrical directions (see arrows).

Now, in the vibrator configured as described above, when the first and second movable parts 3 and 6 are respectively rotated to vary the relative angle θ between them, the eccentric rotation The relative angles of bodies 1, 2 and 4, 5 change. That is, the mutual rotational phase between one set of eccentric rotors 1 and 2 and the other set of eccentric rotors 4 and 5 is such that the relative angle θ between the first and second movable parts 3 and 6 is By varying it, it can be substantially changed. Therefore, by varying the relative angle θ of the first and second movable parts 3 and 6, as shown below, for example, the horizontal component can be canceled out to create a vibration mode with only the vertical component, or the opposite can be achieved. Various vibration modes can be created efficiently and easily, such as a vibration mode with only a horizontal component or a vibration mode that combines vibration components in both directions.

That is, as shown in FIG. 5a, the first and second
When the relative angle θ between the movable parts 3 and 6 is set to 90 degrees, the horizontal vibrations cancel each other out and a vertical vibration mode is obtained. Further, as shown in Figure b, when the elements are moved inward by 45 degrees with respect to Figure A, a complex vibration having both vertical and horizontal components can be obtained. Furthermore, as shown in c of the same figure, further compared to b of the same figure,
When moved inward by 45 degrees for a total of 90 degrees, vertical vibrations are canceled and horizontal vibrations are obtained.

That is, each eccentric rotating body 1 shown in FIG. 5a,
The rotational phase angles of 2, 4, and 5 are shown in Figure 6a.
Each eccentric rotating body 1, 2, arranged as shown in
This is equivalent to the respective rotational phase angles of 4 and 5. Similarly, the state shown in FIG. 5b is equivalent to the state shown in FIG. 6b, and the state shown in FIG. 5c is equivalent to the state shown in FIG. 6c. In other words, here, the first and second
By simply variably setting the relative angle θ of the movable parts 3 and 6, substantially the same effect as variably setting the rotational phase of each of the eccentric rotating bodies 1, 2 and 4, 5 can be obtained. It's getting old. Therefore,
Compared to a configuration in which the rotational phase angle of each eccentric rotating body is directly variable,
It is much smaller, and it is also very streamlined and concise.

As described above, the vibration exciter according to the present invention can easily and efficiently generate vibrations in any mode with a relatively small, simple, and rational configuration. It has the advantage of being convenient to handle, and easy to perform maintenance and servicing.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the exciter according to the present invention, FIG. - A cross-sectional view showing a simplified cross-sectional state of B;
Fig. 4 is a simplified sectional view of the C-C cross-sectional state in Fig. 1, Fig. 5 a, b, and c are perspective views of main parts showing the setting states when obtaining each vibration mode, and Fig. 6 FIGS. 5A, 5B, and 5C are perspective views corresponding to FIGS. 5A, 5B, and 5C to show the phase of each eccentric rotating body. 1, 2... Eccentric rotating body, 3... First movable part,
4, 5...Eccentric rotating body, 6...Second movable part, 7
... Main body case, 8 ... Drive device, 9 ... Worm, 10 ... Pinion, 11a, 11b ... Shaft,
11c, 11d... small gear, 12, 13... gear, 14, 15... segment gear, 16... V
Belt, 17... pulley, 18, 19... gear,
20, 21... Gear, 22, 23... Gear, 1
a, 1... Drive shaft, 2a... Driven shaft, 4a, 5a
...Axis, θ...Relative angle between the first and second movable parts.

Claims (1)

[Claims] 1. A first movable part that is swingably supported by the drive shaft, a driven shaft that rotates at a constant speed in the opposite direction to the drive shaft via a gear at the shaft end of the drive shaft, and a first movable part that is swingably supported by the driven shaft. a second movable part, an eccentric rotating body which is located in the first and second movable parts and is pivotally supported on the outer periphery of the drive shaft and the driven shaft, and is interlocked with the drive shaft and the driven shaft via a gear The eccentric rotor, which rotates at a constant speed in the opposite direction to the eccentric rotor, and the first and second movable parts are respectively swung in opposite directions with respect to the drive shaft and the driven shaft as reference points, thereby opening the relative opening of the two. A moving mechanism for changing the angular position and a locking means for fixing the opening angle position are provided, and the phase of each eccentric rotating body disposed in the first and second movable parts is set according to the opening angle. A vibrating machine characterized by: