VIBRATOR

Abstract

The present invention generally relates to a vibrator for generating vibrations. The invention is in this respect in particular based on an exciter cell having rotationally drivable unbalanced masses that are rotatably supported in an exciter cell housing and having an adjustment unit for adjusting the phase position of the unbalanced masses relative to one another. In accordance with the invention, the adjustment unit is configured as a planetary gearing that has at least two input trains to which the unbalanced masses of the exciter cell are coupled that are adjustable in phase relative to one another and that has an adjustment input train for changing the phase position of the output trains of the planetary gearing.

Claims

1. A vibrator for generating vibrations comprising: rotationally drivable unbalanced masses that are rotatably supported in an exciter cell housing; an adjustment unit for adjusting the phase position of the unbalanced masses relative to one another, wherein the adjustment unit comprises a planetary gearing comprising two output trains, wherein the unbalanced masses are coupled to the output trains, and wherein the unbalanced masses are adjustable in phase relative to one another; and an adjustment input train for adjusting the phase position of the output trains relative to one another.

2. The vibrator of claim 2, wherein the planetary gearing comprises a single-stage gearing.

3. The vibrator of claim 1, wherein at least one of the two output trains is connected to a sun gear, and at least one of the two output train is connected to a ring gear, and wherein the adjustment input train is connected to a carrier of the planetary gearing.

4. The vibrator of claim 3, wherein the at least one of the output trains connected to the sun gear comprises a first exciter cell shaft rotationally fixedly connected to the sun gear, and wherein the at least one of the output trains connected to the ring gear comprises a second exciter cell shaft that is rotationally coupled to the rotatably supported ring gear of the planetary gearing via a spur gear stage.

5. The vibrator of claim 4, wherein the the first and second exciter cell shafts are aligned in parallel with one another and/or in a lying position.

6. The vibrator of claim 3, wherein the adjustment input train comprises an adjustment shaft, and wherein the adjustment shaft is rotationally fixedly connected to the carrier of the planetary gearing and can be brought into different rotational positions by an actuator.

7. The vibrator of claim 6, wherein the actuator comprises a pressure medium cylinder, and wherein the pressure medium cylinder is configured to engage the adjustment input train of the planetary gearing, wherein the adjustment input train of the planetary gearing comprises a crankshaft.

8. The vibrator of claim 1, wherein stoppers are associated with the adjustment input train, and wherein the stoppers predefine rotational end positions between which the phase position of the unbalanced masses is adjustable.

9. The vibrator of claim 3, wherein at least one of the sun gear, carrier, and ring gear of the planetary gearing is configured as adjustable in itself and has two part elements that are rotatable relative to one another and are fixable in different rotary positions relative to one another.

10. The vibrator of claim 3, wherein the ring gear of the planetary gearing comprises an inner gear part and an outer gear part that are rotatable with respect to one another and alignable with one another via elongate holes.

11. The vibrator of claim 1, wherein the adjustment unit is in an adjustment unit housing configured separately from the exciter cell housing, and wherein the adjustment unit housing is releasably fastened to the exciter cell housing.

12. The vibrator of claim 1, wherein the adjustment unit is attached to an outer side of the exciter cell housing, and wherein an exciter cell housing wall and/or a distributor unit housing wall form a separator wall between the exciter cell and the adjustment unit.

13. The vibrator of claim 12, wherein the adjustment unit is arranged at a transverse side of the exciter cell housing that extends perpendicular to the axes of rotation of the unbalanced masses.

14. The vibrator of claim 1, wherein the adjustment unit and at least one drive motor for a rotational drive of the unbalanced masses are on oppositely disposed sides of the exciter cell housing.

15. The vibrator of claim 1, wherein the adjustment unit is independent of and dismantlable from the exciter cell housing.

16. A method for using the vibrator of claim 1 with a construction machine, and where the construction machine comprises a pile driver and/or a drill, and wherein the exciter cell of the vibrator is attached to an adjustable pull yoke.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The invention will be explained in more detail in the following with reference to a preferred embodiment and to associated drawings. There are shown in the drawings:

[0028] FIG. 1: a schematic sectional view of a vibrator in accordance with an advantageous embodiment of the invention that shows the laterally placed on attachment of the adjustment unit in the form of a planetary gearing and its actuator;

[0029] FIG. 2: a plan view of the vibrator and its adjustment unit of FIG. 1 that shows the arrangement of the adjustment actuator and the end abutments limiting the adjustability of the phase angle position; and

[0030] FIG. 3: a detailed perspective and schematic representation of the annular gear of the planetary gearing of FIG. 1 and the spur gear stage meshing therewith, with the annular gear rotationally adjustable in itself being shown with inner and outer gears of the annular gear that are adjustable with respect to one another via elongate holes.

DETAILED DESCRIPTION

[0031] As FIG. 1 shows, the vibrator 1 can have an exciter cell 2 having a plurality of exciter cell shafts that are aligned in parallel and respectively horizontally, that are received in an exciter cell housing 3 and are rotatably supported. The said exciter cell shafts can in this respect be combined into two groups, with the exciter cell shafts of each group being coupled to one another via spur gear stages and accordingly revolving at fixed speed ratios in relation to one another. In this respect, unbalanced masses 4 that can be configured in the form of eccentrically attached unbalanced masses are connected to at least some of the gears connected to the exciter cell shafts. The said exciter cell housing 3 can have bearing and/or fastening sections or parts at the outside by means of which the exciter cell 2 can be mounted to a pull yoke of a construction machine, for example to a drill and/or to a pile drive, of a guide pole or of a cable-operated excavator, or also to a different bearing part of a different construction machine.

[0032] The unbalanced masses 4 are in this respect advantageously arranged and coordinated with one another such that on a rotational revolution, they substantially only generate vibrations in a direction 27 that can in particular be aligned at least approximately vertically on a proper installation and position of work of the vibrator 1, cf. FIG. 1.

[0033] In accordance with the drawn embodiment in accordance with FIG. 1, the exciter cell shafts and the unbalanced masses 4 connected thereto can be driven in a rotationally revolving manner by two or more drive motors 5 and 6. Alternatively, however, only one drive motor can also be provided to drive all the unbalanced masses. In accordance with the drawn embodiment in accordance with FIG. 1, a first drive motor 5 in this respect drives the first group of unbalanced masses 4.1 via a drive shaft 7 whose drive movement is transmitted onto the said further unbalanced masses 4.1 via different spur gear stages and is forwarded up to an exciter cell shaft 9. A second drive motor 6 drives a second group of unbalanced masses 4.2, and indeed via a further drive shaft 8 that drives the further unbalanced masses 4.2 via corresponding spur gear stages and simultaneously forms a second exciter cell shaft 10 that, together with the aforesaid first exciter cell shaft 9, is led out of the exciter cell housing 3 such that the two energy cell shafts 9 and 10 project as a shaft stub into the adjustment unit 11. As FIG. 1 shows, the said adjustment unit 11 can in this respect be arranged at the side of the exciter cell 2 disposed opposite the drive motors 5 and 6. The drive motors 5 and 6 can, however, also be arranged at the other unbalanced mass shafts and/or at the shaft 23.

[0034] The said adjustment unit 11 comprises a planetary gearing 12 that is received in an adjustment unit housing or planetary gearing housing 13 that is separate from the exciter cell housing 3 and that can be placed onto the outside of the exciter cell housing 3.

[0035] As FIG. 1 shows, the adjustment unit housing 13 can be formed in pot shape, with a wall of the exciter cell housing 3 closing the adjustment unit housing 13 and/or being able to form a separator wall between the adjustment unit and the exciter cell. Alternatively, the adjustment unit housing 13 can, however, also be substantially completely closed, with the adjustment unit housing 13 and the exciter cell housing 3 being able to be seated on one another wall to wall. The adjustment unit housing 13 can advantageously be separately removed or dismantled without the exciter cell housing 3 having to be opened for this purpose.

[0036] The said planetary gearing 12 can be formed in a single stage and can have a sun gear 14 that can be arranged coaxially to an annular gear 16 of the planetary gearing 12. Planetary gears 17 can be arranged between the sun gear 14 and the annular gear 16 and can be in rolling engagement both with the sun gear 14 and with the annular gear 16 and can be rotatably supported at a web 15. The said web 15 can itself be rotatably supported and is arranged coaxially to the axes of the sun gear 14 and of the annular gear 16.

[0037] As FIG. 1 shows, the said sun gear 14 can be rotationally fixedly connected to the aforesaid first exciter cell shaft 9. The aforesaid second exciter cell shaft 10 can be rotationally coupled to the annular gear 16 via a spur gear stage 18, with the said spur gear stage 18 being able to be in rolling engagement with the outer gear 16a or the outer periphery of the said annular gear 16.

[0038] Accordingly, the two exciter cell shafts 9 and 10 and thus the said groups of unbalanced masses 4 and the drive motors 5 and 6 connected thereto are rotationally coupled to one another via the planetary gearing 12 such that they revolve correspondingly synchronously or at a fixed speed ratio with respect to one another.

[0039] To be able to adjust the phase position of the unbalanced masses 4 with respect to one another, the said web 15 of the planetary gearing 12 can be adjusted or rotated. For this purpose, an input shaft 19 that can be rotationally fixedly connected to the said web 15 can be connected to an actuator 20 that can advantageously be supported at the adjustment unit housing 13. As FIG. 1 shows, the said actuator 20 can be configured in a simple manner as a pressure medium cylinder that can rotationally adjust the input shaft 19 configured as a crankshaft.

[0040] As FIG. 2 shows, the adjustability of the input shaft 19 and thus of the web 15 can be bounded by end abutments 21 such that the web 15 of the planetary gearing 12 can be moved in a simple manner to and fro between two end positions by the pressure medium cylinder. Depending on the desired configuration, the said actuator 20 can also be stopped and/or fixed in intermediate positions to be able to set intermediate positions continuously or step-wise.

[0041] As FIG. 1 and FIG. 3 show, the planetary gearing 12 can comprise an internal alignment or adjustment device 22, with one of the gears of the planetary gearing in particular being able to be configured as rotatable in itself. The annular gear 16 can in particular have an inner gear 16i and an outer gear 16a that can be rotated relative to one another via elongate holes and that can be brought into different rotational positions relative to one another such that the relative position of the two exciter cell shafts 9 and 10 connected to the planetary gearing 12 can be aligned relative to one another or the relative position of these exciter cell shafts 9 and 10 to the input shaft 19 can be aligned in that the said inner and outer gears 16i and 16a of the annular gear 16 are displaced with respect to one another. Direct gear teeth orientations at the crankshaft 19, web 15, exciter cell shaft 9, 10, sun gear 14 and/or spur gear stage 18 can hereby be dispensed with or positional tolerances in the total gear teeth chain can generally hereby be compensated.