VIBRATORY TAMPING MACHINE FOR COMPACTING A BALLAST BED OF A TRACK

Abstract

A vibratory tamping machine for compacting a ballast bed of a track has a vibration mechanism which is driven by means of an electric drive motor. The vibratory tamping machine has a vibration decoupling device, which defines a decoupling plane and separates a working side from an operating side, for the vibration-decoupling of at least one handle. The handles are arranged on the operating side, whereas the electric drive motor and the vibration mechanism are arranged on the working side.

Claims

1. A vibratory tamping machine for compacting a ballast bed of a track, the vibratory tamping machine comprising: a vibration mechanism; an electric drive motor for driving the vibration mechanism; at least one handle for holding the vibratory tamping machine; a vibration decoupling device for the vibration-decoupling of the at least one handle and the vibration mechanism, wherein the vibration mechanism and the electric drive motor are arranged on a working side of a decoupling plane formed by the vibration decoupling device.

2. The vibratory tamping machine according to claim 1, wherein the vibration decoupling device comprises at least one vibration damper for forming the decoupling plane between the vibration mechanism and the at least one handle.

3. The vibratory tamping machine according to claim 1, further comprising a rechargeable battery for supplying the electric drive motor with electric power, wherein the rechargeable battery is arranged on an operating side of the decoupling plane.

4. The vibratory tamping machine according to claim 3, wherein the rechargeable battery is replaceably fastened to a support frame and is connected to a handle.

5. The vibratory tamping machine according to claim 1, wherein a control device is arranged on an operating side of the decoupling plane.

6. The vibratory tamping machine according to claim 1, wherein exclusively lines run through the decoupling plane.

7. The vibratory tamping machine according to claim 1, wherein by a cooling device for cooling at least one of the electric drive motor and the vibration mechanism.

8. The vibratory tamping machine according to claim 1, wherein the electric drive motor is arranged in an upper portion of a tube facing the decoupling plane.

9. The vibratory tamping machine according to claim 1, wherein the electric drive motor is arranged in a lower portion of a tube facing the ballast bed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 shows a view of a vibratory tamping machine according to a first exemplary embodiment,

[0019] FIG. 2 shows a sectional view of the vibratory tamping machine in FIG. 1 and

[0020] FIG. 3 shows a sectional view of a vibratory tamping machine according to a second exemplary embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] A first exemplary embodiment of the invention is described hereinafter with reference to FIGS. 1 and 2. A vibratory tamping machine 1 which may be electrically operated has an electric drive motor 2 which is connected via a drive shaft 3 to a vibration mechanism 4. The vibration mechanism 4 comprises, for example, an unbalance which vibrates exclusively radially to a rotational axis 5 of the drive motor 2. The vibration mechanism 4 is known and conventional.

[0022] The electric drive motor 2, the drive shaft 3 and the vibration mechanism 4 are arranged in a tube and/or tamping pick tube 6. The tamping pick tube 6 has an axial length L and is subdivided into an upper portion 7 and a lower portion 8. The upper portion 7 has an axial length L.sub.0, whereas the lower portion 8 has an axial length L.sub.0. For the length L.sub.0, the following preferably applies: L.sub.0≤0.7 L, in particular L.sub.0≤0.5 L, and in particular L.sub.0≤0.3 L. Accordingly, for the length L.sub.u, the following applies: L.sub.0≤0.3 L, in particular L.sub.0≤0.5 L, and in particular L.sub.0≤0.7 L.

[0023] The tamping pick tube 6 comprises a tubular base body 9, a tamping tool 10 being replaceably fastened thereto. The tamping tool 10 has, for example, a plurality of tamping plates 11 which are distributed over the periphery and which extend radially.

[0024] The electric drive motor 2 is arranged at an end of the tamping pick tube 6 remote from the tamping tool 10 in the upper portion 7 and outside the lower portion 8. Accordingly, the vibration mechanism 4 is arranged in the vicinity of the tamping tool 10 in the lower portion 8 and outside the upper portion 7. The drive shaft 3 is mounted by means of a bearing 15 in the tamping pick tube 6.

[0025] The vibratory tamping machine 1 also comprises a support frame 12, a first handle 13 and a second handle 14 being arranged thereon at the side. A rechargeable battery 16 is replaceably fastened to the support frame 12.

[0026] The rechargeable battery 16 is connected to a third handle 17. The rechargeable battery 16 supplies the electric drive motor 2 and a control device 18 with electric power. The control device 18 comprises a controller 19 which is fastened to the support frame 12, and an operating unit 20 which is arranged on the handles 13, 14. The operating unit 20 has, for example, at least one operating element for activating the electric drive motor 2.

[0027] The vibratory tamping machine 1 has a vibration decoupling device 21 for the vibration-decoupling of the handles 13, 14, 17 from the vibration mechanism 4 and the electric drive motor 2. The vibration decoupling device 21 comprises a fastening element 22 on the operator side, which is fastened to the support frame 12, and fastening elements 23 on the working side, which are fastened to the tamping pick tube 6. The vibration decoupling device 21 further comprises a plurality of first vibration dampers 24 which connect the fastening element 22 on the operator side to the fastening elements 23 on the working side. By way of example, the vibratory tamping machine 1 has four vibration dampers 24 which are arranged about the rotational axis 5 of the electric drive motor 2. Moreover, the vibration decoupling device 21 comprises a plurality of second vibration dampers 25 which connect the handles 13, 14 to the fastening element 22 on the operator side and to the support frame 12. The vibration dampers 24, 25 are produced from an elastomer material, for example from a rubber material.

[0028] The vibration decoupling device 21 and/or the vibration dampers 24 form a decoupling plane E which decouples a working side 26 from an operating side 27. The tamping pick tube 6, the electric drive motor 2, the drive shaft 3 and the vibration mechanism 4 are arranged on the working side 26. Accordingly, the support frame 12 with the handles 13, 14 and the rechargeable battery 16 with the handle 17 and the control device 18 are arranged on the operating side 27.

[0029] Electrical lines 28 for controlling and supplying power to the electric drive motor 2 run exclusively through the decoupling plane E from the operating side 27 to the working side 26. The electrical lines 28 are illustrated merely schematically in FIG. 2. The electrical lines 28 are protected by a rubber bellows 29.

[0030] The vibratory tamping machine 1 serves for compacting a ballast bed S of a track, in particular below sleepers of the track. By means of the control device 18 the electric drive motor 2 is activated by an operator such that the ballast bed S is compacted in the desired manner by means of the tamping tool 10 located in the ballast bed S. In this case, the operator holds the vibratory tamping machine 1 in both hands, for example on the handles 13 and 14. Forces and/or vibrations generated by the electric drive motor 2 and the vibration mechanism 4 are effectively damped by the vibration decoupling device 21 so that the working side 26 is vibration-decoupled from the operating side 27. The rechargeable battery 16 in this case acts on the operating side 27 as a counterweight and produces an effective vibration damping.

[0031] If the rechargeable battery 16 is discharged, it may be exchanged in a simple manner by means of the handle 17 and replaced by a charged rechargeable battery 16. As the control device 18 is arranged on the operating side 27, it is protected from vibrations.

[0032] A second exemplary embodiment of the invention is described hereinafter with reference to FIG. 3. In contrast to the above exemplary embodiment, the electric drive motor 2 is arranged in the lower portion 8, i.e. outside the upper portion 7, of the tamping pick tube 6. The electric drive motor 2 is connected directly to the vibration mechanism 4, so that an additional drive shaft and an associated bearing are not required. The vibratory tamping machine 1 further comprises a cooling device 30 with a cooler 31, a pump 32 and a coolant line 33. The cooler 31 and the pump 32 are arranged on the support frame 12 on the operating side 27. The coolant line 33 leads from the cooler 31 and the pump 32 through the decoupling plane E into the tamping pick tube 6 and to the drive motor 2 and the vibration mechanism 4. By means of the pump 32, a coolant is pumped through the coolant line 33 so that heat generated by the drive motor 2 and the vibration mechanism 4 is dissipated from the tamping pick tube 6 and conveyed to the cooler 31. By means of the cooler 31, the heat supplied to the coolant is dissipated back into the surroundings. Regarding the further construction and the further mode of operation of the vibratory tamping machine 1, reference is made to the above exemplary embodiment.