JP2002018356A - Vibrating body and vibrator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a downsized vibrating body and a vibrator. SOLUTION: Vibrating force is obtained by rotating plural offcentered weights 4a and 4b. A this time, the plural weights 4a and 4b are in parallel disposed along the axis of rotation by nearly aligning their centers of rotation and therefore the device is constituted compactly without the collision of the eccentric weights each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the excavation and sieving of arable land, the demolition of buildings, the formation of joints in cast concrete,
The present invention relates to an eccentric weight rotary type vibrating body and a vibrating device which are attached to a working machine and generate vibrations in order to efficiently perform rolling and the like.

[0002]

2. Description of the Related Art A vibration device having an eccentric weight is used, for example, to form a joint by vertically inserting a flat blade into concrete cast on the ground, or to apply a flat pressure plate horizontally. For pressing against the ground and compacting
There are uses such as applying vibration to a crushing tool for dismantling a building, and using vibrating an inclined excavating blade.

[0003] These vibration devices contribute to the improvement of efficiency in various operations. For example, in the case of a blade for excavation, in order to excavate gravel and stones mixed in arable land, a blade inclined at 20 to 30 degrees with respect to the ground is pushed into the ground by a self-propelled work machine, and the ground It is used for extracting and sieving the surface layer. By vibrating the blade, the insertion resistance of the blade can be reduced and the excavation efficiency can be improved.

In a conventional vibration device, the rotating shafts are installed in parallel, and two rows of eccentric weights spaced apart from each other are arranged. By rotating the eccentric weights at the same speed in opposite directions, a vertical vibration force is generated.

[0005]

As described above, the conventional vibrating apparatus has two rows of eccentric weights with a distance between the shafts arranged inside, so that the vibrating apparatus itself becomes large. I will. When the vibrating device is large, when the vibrating device is mounted on each work machine, it becomes difficult to mount the vibrating device, and the work may be hindered.

[0006] For example, when pushing a blade into the ground to remove gravel and stones in arable land, a vibrating device may be mounted on the lower surface of the blade so as not to hinder the transport of earth and sand on the blade. Desirably, when the vibration device becomes large, the position where the vibration device is installed on the base machine of the work machine becomes high, the blade has to be extended, the transport distance becomes long, and the transport efficiency is deteriorated. . If the transfer distance cannot be lengthened, the angle of the blade must be steep, which also lowers the transfer efficiency.

In addition, it is necessary to increase the height of the base machine in order to secure a storage space for the vibrating device, so that the entire work machine becomes large. Thus, the vibration device is preferably small.

The present invention has been made in view of the above problems, and has as its object to provide a vibrating body and a vibrating device that can be configured in a small size.

[0009]

According to a first aspect of the present invention, there is provided a vibrating body for obtaining a vibrating force by rotating a plurality of eccentric weights, wherein each of the plurality of weights has substantially the same rotation center. It is characterized by being arranged side by side in the direction of the rotation center.

As described above, if a plurality of eccentric weights are arranged in parallel in the direction of the center of rotation, as in the case where the eccentric weights are mounted on a parallel shaft, the distance between the shafts is reduced to prevent collision between the eccentric weights and the shaft. There is no need to set a large value, and miniaturization can be achieved.

According to a second aspect of the present invention, the vibrating body includes a plurality of cylinders which are arranged side by side in the direction of the rotation center so that the rotation centers are substantially coincident with each other, a weight eccentrically fixed to each of the cylinders, An internal gear provided on an inner surface, first and second shafts penetrating through eccentric positions inside the cylinder, and a plurality of cylinders provided on the first shaft; It is characterized by comprising a gear meshing with an internal gear provided on some of the cylindrical bodies, and a gear provided on the second shaft and meshing with an internal gear provided on the remaining cylindrical body.

As described above, by disposing the shaft for rotating the cylinder provided with the eccentric weight in the cylinder, the size of the vibrating body can be further reduced.

According to a third aspect of the present invention, in the vibrator of the second aspect, the weight is fixed to an inner surface of the cylindrical body.

By providing the eccentric weight on the inner surface of the cylinder, further downsizing can be achieved.

According to a fourth aspect of the present invention, there is provided the vibration device according to the second or third aspect.
And a power transmission mechanism for transmitting the rotation of the first shaft to the second shaft and rotating the first shaft in the reverse direction. And

As described above, by providing the vibrating body structure of the first to third aspects, it is possible to provide a downsized vibrating apparatus by adding a motor and a power transmission mechanism thereto.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a longitudinal sectional view showing one embodiment of a vibration device according to the present invention, and FIGS. 1B and 1C.
FIGS. 1A and 1B are cross-sectional views taken along lines EE and FF in FIG.
In these figures, reference numeral 1 denotes a flat base mounted on a vibration object of a working machine, and has a mounting hole 1a for mounting the vibration object with a bolt or the like. 2a and 2b are base 1
Are rotatably supported by bearings 3a and 3b, respectively. These two cylinders 2a and 2b are alternately arranged two by two in the direction of the rotation center so that the rotation centers substantially coincide with each other. 4a and 4b are cylindrical bodies 2 respectively.
The weights are eccentrically fixed to the outer circumferences of a and 2b.

Reference numerals 5a and 5b denote first and second shafts penetrating through eccentric positions in the cylinders 2a and 2b. Both ends of these shafts 5a and 5b are rotatably supported by bearings 6a and 6b provided on the base 1, respectively. One end of the first shaft 5a is connected to a motor 7 attached to the base 1 via a coupling 8.

Gears 9a, 9b having the same number of teeth are fitted on the shafts 5a, 5b, respectively, and the gears 9a, 9b are meshed with each other to form a rotational force (power) of the first shaft 5a. ) Is transmitted to the second shaft 5b.

A gear 10a meshing with an internal gear 11a provided on the inner surface of the cylindrical body 2a is fixed to the first shaft 5a. Further, a gear 10b meshing with an internal gear 11b provided on the inner surface of the cylindrical body 2b is fixed to the second shaft 5b. Reference numeral 12 denotes a case fixed to the base 1 so as to cover the cylinders 2a and 2b, the motor 7, the shafts 5a and 5b, and the like, and protects these vibrating device components from rain and dust.

The first shaft 5a and the second shaft 5b rotate in the opposite directions by the rotation of the motor 7, and during the rotation, the weights 4a, 4b provided on the cylinders 2a, 2b As shown in (B) and (C), when they rotate to the right and left sides in the drawing, they overlap in the direction of the rotation center. Therefore, as shown in FIG. 1 (D), when the weights 4a and 4b are at the center in the drawing, they are on opposite sides from the center of rotation. For this reason, as shown by an arrow X, a vibrating force is generated in a direction parallel to the base 1 by combining the centrifugal forces of the weights 4a and 4b.

As described above, since the cylinders 2a and 2b having the weights 4a and 4b are arranged side by side in the direction of the center of rotation, the cylinders 2a and 2b are arranged side by side when the respective weights are fitted to the shafts. It can be downsized. Further, the shafts 5a and 5b may be arranged outside the cylinders 2a and 2b. However, by arranging the shafts 5a and 5b inside the cylinders 2a and 2b as in the present embodiment, further downsizing can be achieved.

FIG. 2A is an example of use of the vibration device 13 configured as shown in FIG. 1, and FIG. 2B is a partial side view thereof.
FIG. 2C is a G arrow diagram of FIG. This use case is
In order to remove gravel and stones from the ground such as arable land, a work machine 14 composed of a self-propelled vehicle is provided with an undulating device 15 such as a hydraulic cylinder.
A support frame 17 is mounted so as to be rotatable up and down around a pin 16, a blade 19 is mounted on the support frame 17 via an anti-vibration rubber 18, and the vibration device 13 is mounted on a lower surface of the blade 19. It is.

In the example of use in FIG. 2, the blade 19 vibrates in the plane direction in the traveling direction of the self-propelled vehicle 14 by the vibrating force of the vibration device 13. Thus, the blade 19 can be inserted into the ground with low resistance, excavation can be performed efficiently, and gravel and stone can be efficiently removed by a sieve (not shown).

FIG. 3A is a longitudinal sectional view showing another embodiment of the vibrating device according to the present invention, and FIGS. 3B and 3C are HH and I- of FIG. 3A, respectively. It is I sectional drawing. In the present embodiment, the weights 4c and 4d are respectively connected to the cylindrical bodies 2a and
This is an example provided on the inner peripheral side of 2b. In the present embodiment, the same reference numerals as those in FIG. 1 denote parts that perform the same function, and a duplicate description will be omitted. Also in the present embodiment, the direction of the vibrating force is the same as in the above embodiment.

In the embodiment shown in FIG.
Since c and 4d are provided on the inner peripheral side of the cylinders 2a and 2b,
There is no outward projection of the weight from the cylinders 2a and 2b,
Further downsizing can be achieved. Further, the cylindrical bodies 2a, 2b
If the weights 4a and 4b are provided at the same positions in the circumferential direction as the weights 4c and 4d on the outer periphery of the, a larger vibration generating force can be obtained.

FIG. 4A is a longitudinal sectional view showing another embodiment of the vibration device according to the present invention. In the present embodiment, the motor 7 as the drive source is configured separately from the vibrator 20 excluding the drive source. The vibrating body 20 includes the base 1,
It is composed of cylindrical bodies 2a and 2b provided with weights 4a and 4b and internal gears 11a and 11b, and shafts 5a and 5b provided with gears 10a and 10b.

As described above, the vibrating body 20 is formed separately from the drive source, and the shaft 5a and the output shaft 7a of the motor 7 or the output shaft of the motor 7 are coupled via a reduction gear (not shown). With such a configuration, the motors 7 having different rotation speeds and motive powers can be selected and coupled depending on the application, and a vibrating force suitable for the application can be obtained.

In practicing the present invention, the number of the cylinders 2a and 2b does not need to be the same, and any structure may be used as long as the centrifugal force generated by the weights balances each other between the cylinders rotating in different directions. Needless to say, the direction of the vibrating force is not limited to the direction shown in the above-described embodiment.

According to the first aspect, the plurality of eccentric weights are arranged in the direction of the rotation center so that the rotation centers thereof substantially coincide with each other, so that the eccentric weights are attached to the parallel shaft. In addition, it is not necessary to set a large inter-axis distance in order to prevent a collision between the eccentric weight and the shaft, so that downsizing can be achieved.

According to the second aspect, since the shaft for rotating the cylindrical body provided with the eccentric weight is disposed in the cylindrical body, the size of the vibrating body can be further reduced.

According to the third aspect, since the eccentric weight is provided on the inner surface of the cylindrical body, the size can be further reduced.

According to the fourth aspect, since the vibration device having the vibration body structure according to any one of the first to third aspects, the vibration device can be provided with a reduced size.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional view showing one embodiment of a vibration device according to the present invention, and FIGS. 1B and 1C are each E in FIG.
It is an E and FF sectional view.

2A is a side view of a working machine showing an example of use of a vibration device configured as shown in FIG. 1, FIG. 2B is a partial side view thereof,
(C) is a G arrow diagram of (B). .

FIG. 3A is a longitudinal sectional view showing another embodiment of the vibration device according to the present invention, and FIGS. 3B and 3C are sectional views taken along lines HH and II of FIG. It is. .

FIG. 4 is a longitudinal sectional view showing another embodiment of the vibration device according to the present invention.

[Explanation of symbols]

1: Base, 2a, 2b: cylindrical body, 3a, 3b, 6a, 6
b: bearing, 4a to 4d: weight, 5a: first shaft, 5b: second shaft, 7: motor, 8: coupling, 9a, 9b: gear, 10a, 10b: gear, 11
a, 11b: internal gear, 12: case, 13: vibration device,
14: self-propelled vehicle, 15: undulating device, 17: support frame, 18: anti-vibration rubber, 19: blade, 20: vibrating body

Continued on the front page (72) Inventor Isamu Ichikawa 650, Kandamachi, Tsuchiura-shi, Ibaraki F-term in the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. (Reference) 2D053 AA02 AA07 AA15 AA27 AB02 5D107 AA13 BB10 DD10 FF01 FF05

Claims (4)

[Claims] 1. A vibrating body for obtaining a vibrating force by rotating a plurality of eccentric weights, wherein the plurality of weights are arranged side by side in the direction of the rotation center with their respective rotation centers substantially coincident with each other. Exciting body. 2. A plurality of cylinders which are arranged side by side in the direction of the rotation center with their rotation centers substantially aligned, weights eccentrically fixed to the respective cylinders, and an internal gear provided on the inner surface of each of the cylinders. First and second shafts penetratingly provided at eccentric positions inside the cylindrical body; provided on the first shaft and provided on a part of the plurality of cylindrical bodies. A vibrating body comprising: a gear that meshes with the internal gear provided; and a gear that is provided on the second shaft and meshes with the internal gear provided on the remaining cylindrical body. 3. The vibrating body according to claim 2, wherein the weight is fixed to an inner surface of the cylindrical body. 4. The vibrator according to claim 2 or 3,
Furthermore, a vibration device comprising: a motor for rotating the first shaft; and a power transmission mechanism for transmitting rotation of the first shaft to the second shaft and rotating the shaft in a reverse direction.