JPS59216669A - Vibration generating apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration generating device used in a vibrating management installation device, a vibrating pile driving membrane device, a moving compaction machine, and the like. Specifically, vibration that generates vibration in a direction almost perpendicular to the thrust force while applying thrust force (force acting in the direction of the center axis of the vibrating control equipment, photographic pile driving membrane device, and vibrating compaction rock). This relates to a generator.

A case in which a conventional vibration generator is used in a vibration type management installation device will be described with reference to FIGS. 1 and 2.

This conventional vibration generator A has a cylindrical main body/vibrating body a with a conical tip, and a rotating shaft rotatably supported by a bearing C in the direction of the center axis of the main body/beating body a. An eccentric weight d is provided on this rotating shaft, and the rotating shaft is connected to a drive motor e. When the drive motor e is driven, the rotating shaft rotates, and due to the eccentricity d of the rotating shaft, the main body and vibrating body a moves in a direction substantially perpendicular to the axial direction of the rotating shaft.

The front end of the buried pipe 6 is connected to the rear end of the main body/vibrating body a of the conventional vibration generator A, and the rear end of the buried pipe 6 is set in the starting pusher 4 arranged in a vertical starting circle. do. The ground 3 around the vibration generator A is vibrated by the vibration generator A.
While reducing the strength of the pipe, the extrusion device 4 is extended to propel the buried pipe 6 toward the reaching hole 2. The vibration type management installation device using this vibration generator A has better work efficiency and requires a smaller main push device compared to a press-fit type management installation device in which the buried pipe 6 is pushed forward by the main push device 4. It has great advantages. Furthermore, when the viscosity imparting liquid is supplied from the tip of the main body/vibrating body a, this viscosity imparting liquid and the motion generating device A
The crushed earth and sand are mixed and stirred to form a slurry, and this slurry (viscosity imparting liquid mixed earth and sand) is sent to the vibration generator A.
The vibration generator is filled in the gap formed between the buried pipe 6 and the ground 3, further reducing the frictional resistance between the vibration generator and the buried pipe 6 and the ground 3, further improving work efficiency.
Moreover, the original pushing device 4 can be made smaller.

However, in the conventional vibration generator A described above, the entire main body/vibrator a vibrates, so when the buried pipe 6 is connected to the main body/vibrator a, the vibration generator A in the front part and the buried pipe in the rear part vibrate. 6 are not rigidly connected, the vibration of the vibration generator A will be transmitted to the buried pipe 6. For this reason, the vibrating force of the vibration generating device is reduced, and therefore, a large-sized imaging generating device that generates a large vibration force is required. In addition, even if this imaging generator A is used in a vibrating management equipment or a vibrating line machine, the vibrations in the vibration generator A can be used in a vibrating self-driving driving device, an imaging compaction machine, etc. Since it is transmitted to other equipment, it has the disadvantages mentioned above.

Therefore, a vibration generator was developed that prevents vibrations from being transmitted to buried pipes or other equipment.

To explain the case where this vibration generator B is used in the vibration type management equipment shown in FIGS. The cylindrical part of the vibrator g is inserted into the rear end of the vibrator g and the front end of the main body f, and both ends of the plurality of small diameter rods are connected to the rear end of the vibrator g and the front end of the main body f. They are fixed in a concentric manner, and a bellows-shaped elastic member l is interposed between the front end of the main body f and the rear surface of the conical part of the vibrating body g. A rotating shaft j is rotatably supported in the cylindrical portion of the vibrating body g by a bearing k in the direction of the central axes of the cylindrical portions of the main body f and the moving body g, and an eccentric weight t is provided on the rotating shaft j, The rotation axis j is linked to a drive motor m. Note that the same reference numerals in the figure as in FIGS. 1 and 2 indicate the same parts. A vibrating management equipment equipped with this vibration generator B has the same advantages as the above-mentioned conventional vibrating management equipment equipped with a vibration generator.

In this vibration generator B, a small-diameter bar is disposed between the main body f and the vibrating body g, so that the thrust force from the main pushing device 4 acts on the vibrating body g, and on the other hand, the main body f of this small-diameter bar The vibration of the vibrating body g (vibration in the direction perpendicular to the central axis of the cylindrical part of the main body f and the vibrating body g) is absorbed by the action of vibrating body g in a direction perpendicular to the central axis of the cylindrical part. and is not transmitted to the buried pipe 6 via the main body f. That is, the vibrating body g
and the buried pipe 6 are connected by a beam through a small-diameter rod and the main body f. Therefore, like the conventional imaging generator mentioned above,
To improve disadvantages such as the need for a large device that generates a large vibrational force because vibrations are transmitted to the buried pipe 6 or other equipment such as a vibrating pile driving membrane device or a photographic compaction machine. be able to.

However, since this motion generating device B is configured such that a plurality of small diameter rods are disposed between the main body f and the vibrating body g, and the thrust force is received by the small diameter rods,
There is a problem in that if a large thrust force is applied to this small diameter bar, this small diameter bar may be damaged.

In view of the above-mentioned points, the present invention aims to provide a vibration generator that does not waste excitation force (transmission of S motion to buried pipes or other equipment) and can sufficiently withstand large thrust force. It is something.

In the present invention, a camera body is supported via a spherical surface in a main body, a rotating shaft is rotatably supported in the vibrating body in the direction of the central axis of the main body, and two eccentric silicones are mounted at both ends of the rotating shaft with a 180° phase. It is characterized by being shifted and symmetrically provided with respect to the center of the spherical surface, and this rotation axis is linked to the drive unit.

Hereinafter, one embodiment of the vibration generator of the present invention will be described with reference to FIGS. 5 to 7.

In the drawings, the same reference numerals as in FIGS. Vessels and eccentric weights22.
22' or the like.

The main body has a double cylindrical shape consisting of an inner cylindrical part 201 and an outer cylindrical part 202, each having a closed rear end and an open front end. 200 is formed. The vibrating body 5 has a conical front end, an inner cylindrical part 502 and an outer cylindrical part 503 extending rearward from the rear surface of the conical part 501 in a double cylindrical shape, and the rear end is open and the outer cylindrical part 502 is opened. A spherical recess 500 is formed on the inner circumferential surface of the front end of the cylindrical portion 503, the center of which is the same as the spherical protrusion 200. Inner cylindrical portion 50 of the vibrating body 5
2 into the inner cylindrical part 201 of the main body addition, and the outer cylindrical part 503 of the vibrating body 5 is inserted between the inner cylindrical part 201 and the outer cylindrical part 202 of the main body addition. The concave portion 500 is engaged with and supported by the spherical convex portion 200 of the main body. Both ends of the rotary shaft are connected to the inner cylindrical portion 502 of the photographing body 5 by means of bearings, and the center axis of the inner cylindrical portion 201°, the outer cylindrical portion 202, and the inner cylindrical portion 502° of the vibrating body 5 and the outer cylindrical portion 503. It is supported on a shaft so that it can rotate freely in the direction.

Two eccentric weights 22゜22' are installed at both front and rear ends of this rotating shaft.
are shifted in phase by 180'' and are provided symmetrically with respect to the center 0 of the spherical convex portion 200 and the spherical concave portion 500, and the rear end of the rotating shaft is linked to the drive motor 10.

A sealing material 5 is interposed between the outer cylindrical portion 202 of the main body and the outer cylindrical portion 503 of the vibrating body 5.

In the vibration generator of the present invention in this embodiment, the front end of the buried pipe 6 is connected to the rear end of the main body, and the drive motor 10 is driven. Then, the rotation axis n rotates, and the two eccentrics 422 and 22' provided at both ends of this rotation axis unit rotate into the spherical convex portion 200.
The two eccentric weights 22.2
2', the vibrating body 5 vibrates around the center O of the spherical convex part 200 and the spherical concave part 500 as described in detail later, reducing the strength of the surrounding ground and making it easier to bury. The tube 6 is propelled. That is, when the rotary shaft is rotated, the eccentric weight 22.22' rotates, so that a centrifugal force is generated by the eccentric weight 22.22'. The centrifugal force of the front eccentric weight 4 acts upward in the plane of the paper of Fig. 5, and the centrifugal force of the rear eccentric weight 22' acts downward, and these constitute a couple, and this couple causes vibration. It is transmitted to the body 5. The center of this couple is the spherical convex portion 20
0 and the center O of the spherical recess 500, the vibrating body 5 vibrates in a multi-action manner around the center O due to the force couple.

This miso-sushi motion-like vibration will be further explained in detail with reference to FIGS. 6 and 7.

First, it is assumed that the rotating shaft rotates counterclockwise toward the front of the vibrating body 5 as shown by the arrow in FIG. At this time,
When the front eccentric weight n is positioned upward and the rear eccentric weight n' is positioned downward, the vibrating body 5 points downward about the center O of the spherical surface (Fig. 6 (a) and Fig. 7 (a)). ).

Subsequently, when the front eccentric weight n is positioned on the left side and the rear eccentric weight 22' is positioned on the right side when facing the front of the vibrating body 5, the camera body 5 is oriented to the right around the center O of the spherical surface (
6(b) and 7(b)). Subsequently, when the front eccentric weight n is positioned downward and the rear eccentric weight 22' is positioned upward, the vibrating body 5 points upward about the center O of the spherical surface (FIG. 6 fc) and FIG. 7 ( c) ). Further, the front eccentric weight n is on the right side, and the rear eccentric weight a′
are respectively located on the left side, the moving body 5 is located at the center O of the spherical surface
It turns to the left with the center at the center (Fig. 6(d) and Fig. 7(d)). By continuing the above-described motion of the vibrating body 5, the vibrating body 5 performs a vertical oscillating motion when viewed from a cross section in the central axis direction as shown in FIG. When viewed from the front, the tip of the conical vibrating body 5 rotates counterclockwise as shown in the figure. Such a motion of the vibrating body 5 around the spherical center O is a miso-shaped motion, and this will be referred to as a miso-9 vibration in this specification.

As mentioned above, since the vibrating body 5 vibrates around the center O of the spherical convex part 200 and the spherical concave part 500,
The vibration of the vibrating body 5 is not transmitted to the buried pipe 6 via the main body. Therefore, like the first conventional vibration generator A,
It is not necessary to make it large in order to generate a large excitation force. - Furthermore, since the vibrating body 5 and the main body are supported by the spherical convex portion 200 and the spherical concave portion 500, even if a large thrust force is applied to the vibrating body 5, the spherical convex portion 200
And since the spherical recess 500 receives thrust force, the second
Unlike the conventional vibration generator B, there is no risk of the small-diameter rod breaking, and it can sufficiently withstand large thrust forces.

In addition, in the above-mentioned example, an example was described in which it was used in a vibrating management installation device, but the above-mentioned also applies even when it is used in other devices, such as a vibrating pile driving membrane device or a vibrating compaction machine. The same effects can be achieved.

As is clear from the above embodiments, the imaging generating device of the present invention has two features. A vibrating body is supported on the main body via a spherical surface, a rotating shaft is rotatably supported in the vibrating body in the direction of the central axis of the main body, and two eccentric weights are mounted at both ends of the rotating shaft with a phase difference of 180°. The rotating shaft is provided with a drive unit linked to the rotating shaft, so when the drive unit is driven, the rotating shaft rotates,
The camera body vibrates around the center of the spherical surface in response to the vibration moment generated by the rotation of the two eccentric weights at both ends of the rotating shaft, and this vibration of the camera body is not transmitted to the main body. Therefore, like the first conventional vibration generator in which vibrations are transmitted to buried pipes and other water vessels, a large-sized device that generates a large excitation force is necessary.7.

Further, since the imaging body and the main body are supported by a spherical surface, it was mentioned that the small diameter rod would be damaged if a large thrust force is applied, as in the second conventional example of the imaging generating device. There is no danger and it can withstand a large amount of thrust force.

[Brief explanation of drawings]

FIG. 1 is a side view of a first conventional vibration generator used in a vibrating ``U'' burial device, and FIG. 2 is a sectional view of the main part. FIG. 3 is a side view of a second conventional vibration generator used in a vibration type management equipment, and FIG. 4 is a cross-sectional view of the main parts. 5 to 7 show an embodiment of the imaging generating device of the present invention, FIG. 5 is a sectional view of the main part, FIG. 6(a) to (d), and FIG. 7(a) to (d) is an explanatory diagram of miso-photography of the vibrating body. 5... Vibrating body, 10... Drive motor, 20... Main body, 22゜4'... Eccentric weight, n... Rotating shaft, Sae...
- Bearing, 200... Spherical convex part, 500... Spherical concave part. Patent Applicant Nippon Telegraph and Telephone Public Corporation Patent Applicant Hitachi Construction Machinery Co., Ltd. Agent Tadashi Akimoto 650 Kandachi-cho, Hitachi Construction Machinery Co., Ltd., Tsuchiura Factory. Author: Nobuyuki Tobita. 650 Kandate-cho, Tsuchiura City. Hitachi Construction Machinery Co., Ltd. Tsuchiura Factory. 0 accident. Author: Masao Suda. 650 Kandate-cho, Tsuchiura City. Hitachi Construction Machinery Co., Ltd. Tsuchiura. 0 accidents in the factory 650 Kandachi-cho, Kiyotsuchiura-shi Hitachi Construction Machinery Co., Ltd. 0 accidents in the Tsuchiura factory 650 Hitachi Construction Machinery Co., Ltd. Kandate-cho, Tsuchiura city Hitachi Construction Machinery Co., Ltd. Tsuchiura Factory, 650 Kandachi-cho ■Applicant Hitachi Construction Machinery Co., Ltd. 2-6-2 Otemachi, Chiyoda-ku, Tokyo

Claims (1)

[Claims] A vibrating body is supported at the tip of the main body via a spherical surface, a rotating shaft is rotatably supported in the vibrating body in the direction of the central axis of the main body, and two eccentric weights are attached to both ends of the rotating shaft with a 180° phase. The rotary shaft is connected to a drive unit, and the drive unit is driven to rotate the rotary shaft, and the two eccentric weights of the rotary shaft generate vibrations. A vibration generator characterized in that the body is configured to vibrate nine times around the center of the spherical surface.