CN1116135A

CN1116135A - Vibrator apparatus

Info

Publication number: CN1116135A
Application number: CN 95103614
Authority: CN
Inventors: 乌尔里克·奥斯特塔格; 威尔马·洛内斯恩
Original assignee: Vibro-Block Maschinen und Anlagen fur Die Beton-Und Steinindustrie GmbH
Current assignee: Vibro-Block Maschinen und Anlagen fur Die Beton-Und Steinindustrie GmbH
Priority date: 1994-03-29
Filing date: 1995-03-29
Publication date: 1996-02-07
Also published as: DE9405305U1; DE19508243A1

Abstract

A rapping device is provided with a vibrating board, a plurality of non balance shafts (12, 14, 16, 18, 62, 64, 82, 84), at least a non balance body (20, 22, 24, 26, 66, 68, 86, 88) which is arranged on the non balance shafts and exerts acting force on the vibrating board, and a motor drive set (50, 52), and is characterized in that each two adjacent non balance shafts (14, 16,12, 18) which are vertical to the direction of the vibration share the same motor drive set (50, 52), the two non balance shafts (14, 16,12, 18) are connected with each other by a toothed gearing.

Description

Vibration device

The present invention relates to an unbalanced vibration type vibration device, for example, a vibration device which vibrates using a so-called vibration table or other member capable of generating vibration. The vibrating table can be used in the manufacturing process of concrete prefabricated members. On which a number of moulds are fixed. Under the action of the vibration table generating vibration, the mould vibrates along with the vibration device. Whereby the concrete filled in the mold can be compacted. Furthermore, such vibration devices are known for compacting foundations. The material deposited or filled in such devices can be compacted by a plate in a vibrating state.

DE-PS 4116647 discloses a vibration table with a vibration device. The vibration device includes pairs of unbalanced shafts having unbalanced masses arranged in pairs such that unbalanced forces generated by the unbalanced shafts act only in a predetermined linear direction. On this vibration device, all unbalanced shafts are each driven by a motor drive. One of the motor drives serves as the so-called master drive, while all the other motor drives serve as the so-called slave drives. The main drive rotates the unbalanced shaft connected with the main drive at a preset rotating speed. The other motor driving devices are adjusted by an electronic control device to ensure that the unbalanced shaft connected with the motor driving devices can synchronously rotate with the shaft driven by the main guide driving device. In this way, by adjusting the phase difference of the unbalanced mass on two unbalanced shafts out of the four unbalanced shafts with respect to the unbalanced masses of the other two unbalanced shafts, the magnitude of the unbalanced force (vibration force) can be changed. For this purpose, two of the four shafts are driven in rotation at a slower speed for a short time in order to change the orientation of the opposing unbalanced masses. Such a vibration device requires at least four unbalanced shafts or an integral multiple of four unbalanced shafts, as well as motor drives and adjustment devices for the motor drives in the same number as the unbalanced shafts.

Against this background, the object of the invention is to provide a vibration device which is more economically justifiable.

The invention is a vibration device with

-a vibrating plate for vibrating the diaphragm,

-a number of non-equilibrium axes,

-at least one unbalanced mass exerting a force on the vibrating plate on each unbalanced axis,

-a motor drive for driving the unbalanced shaft,

the method is characterized in that:

-each two unbalanced shafts adjacent in a direction perpendicular to the direction of vibration share a drive,

-said two unbalanced shafts are connected to each other by means of a gear transmission.

Or,

there are at least two unbalanced shafts, the axes of rotation of which are collinear,

in this case, one of the two unbalanced shafts is driven by a first motor drive and the other unbalanced shaft is driven by a second motor drive,

wherein the second motor drive is connected to the first motor drive via a constant velocity adjustment device.

If unbalanced shafts are used in the vibration device according to the invention, which are arranged side by side, as is already mentioned in DE-PS 4116647, the number of motor drives and adjusting devices required is only half. The other half of the unbalanced shaft is not driven by the motor, but rotates synchronously with the motor through gear transmission. Such a vibration device is therefore less expensive to manufacture than the vibration devices known in the prior art.

A very narrow vibrating device can be constructed if the vibrating device of the invention uses only two unbalanced shafts with the same axis of rotation, for example, with their axes of rotation collinear. In some extreme cases, only two unbalanced shafts are used in order to obtain the desired linear vibratory force. This not only makes the vibration apparatus as small as possible, but also reduces its cost since the required unbalance is reduced by half compared to known apparatuses.

Further preferred embodiments and configurations of the invention emerge from the features of the dependent claims and the following description of exemplary embodiments.

Embodiments of the invention will be further described below with the aid of the figures. Wherein:

FIG. 1 is a top view of a vibratory apparatus with four vibratory shafts arranged side by side;

FIG. 2 illustrates another embodiment of a vibratory apparatus in which two unbalanced shafts have the same axis of rotation;

figure 3 shows another embodiment with two unbalanced shafts sharing a common axis of rotation.

Fig. 1 shows a top view of a vibratory apparatus 10 of the invention with four unbalanced shafts 12, 14, 16, 18. The four unbalanced shafts are in adjacent positions. A pair of axially spaced unbalanced masses 20 (on shaft 12), 22 (on shaft 14), 24 (on shaft 16) and 26 (on shaft 18) are secured to each of the unbalanced shafts 12, 14, 16 and 18. The unbalanced masses are fixed on the respective axes in an orientation that ensures that only one linear unbalanced force is generated in a direction perpendicular to the plane of the paper. The technical solution of making the arrangement of the unbalanced masses 20, 22, 24, 26 meet the above requirements is known and therefore will not be described in detail here.

The four shafts 12, 14, 16, 18 are each rotatably supported on a fixed base member 28, 30. The base element is fixedly connected to the vibration table, for example, covered above it, by means of one of the shafts, so that, as the unbalanced shaft rotates, an arrangement corresponding to the unbalanced shaft will generate unbalanced forces of different magnitudes, which may cause the vibration table to vibrate along with the base element in a direction perpendicular to the plane of the paper.

Gear 34 is non-rotatably mounted on shaft 16 by a key 32. The gear wheel 34 meshes with a gear wheel 36 which is also non-rotatably mounted on the unbalanced shaft 14 by means of a key 32. The two gears 34, 36 are of identical construction and therefore have the same rotational speed.

The unbalanced shafts 12 and 18 are connected to each other by means of gears. A gear 40 non-rotatably mounted on the shaft 12 with the key 32 meshes with a gear 42 freely rotatably supported on the shaft 14. Gear 42 also meshes with a gear 44 which is freely rotatably supported on shaft 16. The gear 44 in turn meshes with a gear 46 which is non-rotatably mounted on the shaft 18 by means of the key 32. As the shaft 12 rotates, the gears 40, 42, 44, 46 rotate therewith, the gears being selected to ensure that the rotational speed of the shaft 12 is equal to the rotational speed of the shaft 18. However, the directions of rotation of the shafts 12, 18 are opposite. This is also the case for shafts 14 and 16.

The shafts 16 and 12 are driven by

motor drives

50 and 52, respectively, to rotate at corresponding rotational speeds. The same rotational speed values of the shafts 12 and 16 can be ensured by the constant speed regulator 54. The desired rotational speed is predetermined by the motor drive 50 of the drive shaft 16. Therefore, the motor drive device 50 is a so-called master drive. In contrast, the motor drive 52 is a so-called driven drive, since the rotational speed of the shaft 12 driven thereby depends on the rotational speed of the shaft 16.

The constant velocity adjuster 54 can be adjusted in a known manner to provide a predetermined phase difference in the shaft 12 relative to the shaft 16. However, the rotational speed values of the two shafts having the phase difference are the same. Since the shafts 14, 18 are geared to the shaft 16 driven by the motor drive and to the shaft 12 driven by the other motor drive, all shafts have the same rotational speed. However, the unbalanced shafts on these shafts may be oriented differently corresponding to the desired unbalanced force.

There are only two unbalanced axes on the device 10.2 shown in fig. 2. The inner unbalanced shaft 62 is located in a hollow outer unbalanced shaft 64. On the shaft are mounted non-balancing bodies 66 (on shaft 62) and 68 (on shaft 64) similar to those shown in fig. 1. The inner unbalanced shaft 62 is rotatably supported on a fixed base member 70 in a manner similar to the coupling to the base member 28 shown in fig. 1. The hollow shaft 64 is supported on the shaft 62 by a ball bearing 72.

Motor drive 50 drives unbalanced shaft 62, while another motor drive 52 drives hollow shaft 64. The two motors are connected to each other by a constant velocity adjuster 54 in the manner shown in fig. 1.

The motor drive 52 does not drive the shaft 64 directly, but transmits its driving force through a pair of intermeshing gears 74, 76. The gear 74 is fixed in a rotationally fixed manner by means of a key 32 on an additional shaft 78, while the other gear 76 is fixed on the hollow shaft 64. One end of the shaft 78 is connected to the motor drive 52. The motor drive 52 then rotates the drive shaft 78 together with the gear 74, which is connected in a rotationally fixed manner. The gear 74 in turn rotates the gear 76 which is in mesh therewith, thereby rotating the hollow shaft 64. In the device 10.2, the rotation of the

unbalanced shafts

62, 64 has a phase difference as shown in fig. 1, and their speeds are the same.

A shaft 78 for effecting a drive connection between motor drive 52 and hollow shaft 64 may be disposed alongside or below shaft 62. The longitudinal arrangement of the shaft 78 can be adjusted according to the actual spatial conditions.

The device 10.3 shown in fig. 3 likewise has an inner unbalanced shaft 82 which is accommodated in an outer unbalanced shaft 84. Likewise, two unbalanced masses 86 are arranged on the unbalanced shaft 82, spaced apart from one another. The shaft 82 can be brought to a rotational speed by a motor drive 50 in a known manner. The motor drive 50 is located at the axial extension of the shaft 82.

One end of the hollow shaft 84, which is likewise an unbalanced shaft, is connected to a spindle 84.1. Its longitudinal axis 87 is collinear with the longitudinal axis of the inner shaft 82. Spindle 84.1 is driven by a further motor drive 52. The two

motor drives

50, 52 are connected to one another by a constant velocity adjuster 54, as already described in fig. 1 and 2. The two

motor drives

50, 52 are located at opposite elongate ends of the longitudinal axis 87. Whereby a vibrating device of an elongated structure can be used.

The left unbalanced mass 88.1 is fixed to both the mandrel 84.1 and the hollow shaft 84 to provide an unbalanced force to the hollow shaft 84. On the right side of the hollow shaft 84 in fig. 3, a balancing unbalanced mass 88.2 is provided, which is only connected to the hollow shaft 84 in a rotationally fixed manner and can rotate relative to the unbalanced shaft 82.

The end piece 82.1 of the shaft 82 adjacent to the spindle 84.1 is supported on an unbalanced mass 88.1 by means of a ball bearing 90. The opposite shaft end 82.2 is supported in a balanced manner on the unbalanced mass 88.2 by means of a ball bearing 90. The shaft 82 is thus supported directly and rotatably via the shaft end piece 82.2 on the fixed base part 92 on the right in fig. 3, while the end piece 82.2 of the shaft 82 on the left in fig. 3 is supported indirectly via the unbalanced mass 88.1 on the fixed base part 94 on the left in fig. 3. The unbalanced mass 88.1 together with the hollow shaft 84 is rotatably supported on this left unbalanced mass 94 by means of a ball bearing 96. As a result, the two

shafts

82, 84 are fixedly attached to the

base members

92, 94. By adjusting the orientation of the unbalanced mass 86 relative to the unbalanced masses 88.1 and 88.2 in a known manner, a corresponding unbalanced force can be obtained. When the device 10.3 is rotated, the

shafts

82, 84 are also rotated at the same speed.

The devices 10, 10.2 and 10.3 shown in the figures can be made up of a plurality of devices or any combination of devices. For example, an inner shaft 62 can be provided on the device 10.2 on one side of the existing device, which shaft is at least partially surrounded by a hollow shaft 64. The

additional shaft devices

62, 64 can be connected via gears to a shaft driven by the motor drive 50 or to a shaft 78 driven by the electric motor drive 52. Thus, it is not necessary to add an additional motor driving device.

The constant velocity adjuster 54 mentioned above may be configured such that, for example, the phase difference of the driven drive relative to the master drive is adjustable. However, the two drives, i.e. the master drive and the slave drive, can also have their phases adjusted in opposite rotational directions. Importantly, the two driving devices can be adjusted relatively.

Claims

1. A vibration device having thereon

-a vibrating plate for vibrating the diaphragm,

-a number of unbalanced shafts (12, 14, 16, 18, 62, 64, 82, 84),

-at least one unbalanced mass (20, 22, 24, 26, 66, 68, 86, 88) exerting a force on the vibrating plate on each unbalanced axis,

-a motor drive (50, 52) for driving the unbalanced shaft,

the method is characterized in that:

-one drive means (50; 52) is shared by every two unbalanced shafts which are adjacent in a direction perpendicular to the direction of vibration,

-the two unbalanced shafts (14, 16; 12, 18) are interconnected by a gear transmission (34, 36; 40, 42, 44, 46).

2. Vibrating device according to claim 1,

-a first motor drive (50) driving a first pair of unbalanced shafts (14, 16), a second motor drive (52) driving a second pair of unbalanced shafts (12, 18),

the second drive device (52) is connected to the first drive device (50) via a constant-velocity adjusting device (54).

3. Vibration apparatus as claimed in any one of the preceding claims,

-providing at least four unbalanced shafts (12, 14, 16, 18) arranged side by side,

-two of said shafts (14, 16), in particular two inner unbalanced shafts, are interconnected with the other two shafts (12, 18), in particular the outer unbalanced shafts, by means of a gear transmission (50, 52).

4. A vibration device having thereon

-a vibrating plate for vibrating the diaphragm,

-a number of unbalanced shafts (62, 64, 82, 84),

-at least one unbalanced mass (66, 68, 86, 88) exerting a force on the vibrating plate on each unbalanced axis,

-a motor drive (50, 52) for driving the unbalanced shaft,

the method is characterized in that:

-there are at least two unbalanced shafts (62, 64; 82, 84) whose axes of rotation are collinear,

one of the two unbalanced shafts (62, 82) is driven by a first motor drive (50) and the other unbalanced shaft (64, 84) is driven by a second motor drive (52),

the second motor drive (52) is connected to the first motor drive (50) via a constant-velocity adjusting device (54).

5. Vibrating device according to claim 1,

-an inner unbalanced shaft (62, 82) is housed in at least one hollow shaft (64, 84) acting as an unbalanced shaft.

6. The vibration apparatus of claim 5 wherein the inner unbalanced shaft is surrounded by at least two hollow shafts disposed at a distance longitudinally along the inner unbalanced shaft.

7. Vibrating device according to one of the preceding claims, wherein several groups of unbalanced shafts are provided, alongside each other, wherein,

each group of unbalanced shafts consists of either two unbalanced shafts having the same axis of rotation or at least four unbalanced shafts arranged side by side,

two motor drives each for a set of unbalanced shafts, one drive being the master drive and the other being the slave drive.