VIBRATORY PILE-DRIVING DEVICE

Abstract

The invention relates to a vibratory pile-driving apparatus having a carrier implement with a mast, on which, for the purpose of generating vibrations, a vibration generator with a transmission housing is supported, in which at least one pair of rotatably supported unbalanced units is arranged that are driven in a rotating manner by at least one rotary drive. According to the invention provision is made in that the transmission housing is surrounded by a soundproof housing, in which the transmission housing is supported by way of damping elements, and in that from the transmission housing at least one oil supply line and one oil discharge line are led out of the soundproof housing, wherein transmission oil can be cooled outside the soundproof housing.

Claims

1. Vibratory pile-driving apparatus having a carrier implement with a mast, on which, for the purpose of generating vibrations, a vibration generator with a transmission housing is supported, in which at least one pair of rotatably supported unbalanced units is arranged that are driven in a rotating manner by at least one rotary drive, wherein the transmission housing is surrounded by a soundproof housing, in which the transmission housing is supported by way of damping elements, and from the transmission housing at least one oil supply line and one oil discharge line are led out of the soundproof housing, wherein transmission oil can be cooled outside the soundproof housing.

2. Vibratory pile-driving apparatus according to claim 1, wherein the soundproof housing is provided with a soundproof layer.

3. Vibratory pile-driving apparatus according to claim 1, wherein the damping elements have dampers of a rubber material.

4. Vibratory pile-driving apparatus according to claim 1, wherein the at least one rotary drive is a hydraulic motor.

5. Vibratory pile-driving apparatus according to claim 1, wherein as transmission oil for the transmission housing hydraulic oil is provided, with which the rotary drive is also operated.

6. Vibratory pile-driving apparatus according to claim 5, wherein the hydraulic oil from the transmission housing and the hydraulic oil from the hydraulic motor is returned to a joint hydraulic oil tank which is arranged on the carrier implement.

7. Vibratory pile-driving apparatus according to claim 6, wherein the hydraulic oil tank is connected to a cooling means.

8. Vibratory pile-driving apparatus according to claim 1, wherein the soundproof housing has at least one lockable access door.

9. Vibratory pile-driving apparatus according to claim 1, wherein the soundproof housing has a guide means, with which the vibration generator is guided in a displaceable manner along the mast.

10. Vibratory pile-driving apparatus according to claim 1, wherein on an underside of the transmission housing a holding unit for clamping and holding a driving material is mounted and the soundproof housing is spaced from the holding unit through the formation of an annular gap that is covered by an elastic cover element.

11. Vibratory pile-driving apparatus according to claim 10, wherein the cover element is designed as a bellows which is fixed on the one hand on the soundproof housing and on the other hand on the holding unit.

12. Vibratory pile-driving apparatus according to claim 1, wherein in an upper area of the soundproof housing a quick-coupling unit for the oil discharge line and the oil supply line is arranged.

13. Vibratory pile-driving apparatus according to claim 1, wherein on the external side of the soundproof housing at least one connecting means with a support surface is provided, on which a damping covering is arranged.

Description

[0021] The invention is described further hereinafter by way of a preferred embodiment illustrated schematically in the accompanying drawings, wherein show:

[0022] FIG. 1 a side view of a vibration generator according to the invention;

[0023] FIG. 2 a cross-sectional view of the vibration generator according to the invention of FIG. 1;

[0024] FIG. 3 a perspective view of the vibration generator of FIG. 1 and FIG. 2;

[0025] FIG. 4 a detailed view of a connecting means of the vibration generator of FIG. 3; and

[0026] FIG. 5 a side view of a vibratory pile-driving apparatus according to the invention.

[0027] According to FIG. 5 a vibratory pile-driving apparatus 10 pursuant to the invention has a carrier implement 12 which comprises in a known manner a crawler-track running gear as an undercarriage and an upper carriage arranged thereon in a rotatable manner. On the upper carriage of the carrier implement 12 a mast 14 is linked in a pivotable manner which is designed as a leader with a lower mast part 15, along which an upper mast part 16 is guided in a vertically movable manner. Along a front side of the upper mast part 16 a linear guide 17 is designed, along which a vibration generator 20 according to the invention is guided by a guiding means 40.

[0028] On its upper side the vibration generator 20 is releasably coupled via a quick-coupling 41 to a feed carriage 18 that can be moved via a feed means along the linear guide 17 of the upper mast part 16. To form the quick-coupling 41 a lower quick-coupling unit 42 is arranged on the vibration generator 20, which establishes a connection with an upper quick-coupling unit 43 on the feed carriage 18. Via lines 19 hydraulic oil can be led from the carrier implement 12 along the mast 14 up to the vibration generator 20.

[0029] The construction of a vibration generator 20 according to the invention is explained in greater detail in conjunction with FIGS. 1 to 3. The vibration generator 20 has an internal transmission housing 22, in which two pairs of rotating unbalanced units are supported that are driven in a rotating manner by two lateral rotary drives 24. The rotary drives 24 are designed as hydraulic motors. Through the rotating unbalanced units the transmission housing 22 is set into vibration. At the lower end of the transmission housing 22 a holding unit 50 for beams, in particular sheet piles, to be driven in or extracted is firmly mounted. For this purpose, the holding unit 50 has a stationary clamping jaw 52 and a clamping jaw 54 movable relative thereto which is moved linearly by a lateral clamping cylinder 56 in order to clamp the sheet pile. As a slipping through protection for the sheet pile a connecting means 26, which will be explained in greater detail at a later stage, is arranged laterally on the stationary clamping jaw 52.

[0030] To reduce sound radiation the transmission housing 22 is surrounded to a large degree by a soundproof housing 30. The transmission housing 22 is connected to the external soundproof housing 30 by means of several damping elements 34 which each have a damper 35 of a rubber material.

[0031] The soundproof housing 30 is formed of sheet metal, on the internal side of which a soundproof layer 36 is arranged. Due to its elastic support the transmission housing 22 is able to vibrate freely in the soundproof housing 30 and transfer the vibration to the holding unit 50. The holding unit 50 is spaced from the soundproof housing 30 through the formation of an annular gap 48. To prevent sound radiation by the gap 48 this is covered by a flexible cover element 46 that is designed as a bellows. To form an access to the internal transmission housing 22 a removable access door 38 is provided on a front side of the soundproof housing 30 of the vibration generator 20.

[0032] By way of a bracket-like guide means 40 on the soundproof housing 30 the vibration generator 20 is supported in a displaceable manner along the mast 14. On the upper side of the soundproof housing 30 a lower quick-coupling unit 42 of the quick-coupling 41 is arranged in order to firmly connect the vibration generator 20 to a feed carriage 18 on the mast 14. For this purpose, a corresponding upper quick-coupling unit 43 is arranged on the feed carriage 18. By way of suitable plug-in coupling elements 44 a leak-free connection of oil lines can be effected.

[0033] To provide the rotary drives 24 with hydraulic oil and to supply and discharge oil to and from the transmission housing 22 oil supply lines 28a and oil discharge lines 28b are led in an arched manner through an opening in the upper area of the soundproof housing 30 out of the said soundproof housing 30 towards the lower coupling unit 42. In this way, hydraulic oil, which is also at the same time transmission oil for lubrication of the transmission elements in the transmission housing 22, can be led via the quick-coupling 41 to the lines 19, with which oil can be led to the hydraulic units and a hydraulic oil tank on the upper carriage of the carrier implement 12. By thus leading the oil an adequate cooling of the oil in the transmission housing 22 is also ensured despite the fact that the transmission housing 22 is surrounded by a soundproof housing 30.

[0034] According to FIG. 4 a holding means 26 for a safety chain is provided on the stationary clamping jaw 52 in a rear area. The safety chain is connected to the sheet pile, in which case a corresponding linkage of the safety chain to the connecting means 26 ensures that even in the case of failure of the holding unit 50 the sheet pile does not hit the ground in an uncontrolled manner. To avoid sound radiation by the safety chain a damping covering 27 is arranged on a support surface on the plug-lock-like connecting means 26. Through this, a direct transmission of vibrations from the holding unit 50 to the safety chain is reduced considerably.