Compactor for compacting soil

• US 6,293,729 B1
• Filed: 06/30/1999
• Issued: 09/25/2001
• Est. Priority Date: 04/18/1997
• Status: Expired due to Fees

• Current Assignee: Wacker Neuson Produktion GmbH & Co. KG
• Original Assignee: Wacker-Werke GmbH & Company KG
• Inventors: Greppmair, Martin
• Primary Examiner(s): Will, Thomas B.
• Assistant Examiner(s): Hartmann, Gary S.
• Application Number:
  US09/341,041
• Time in Patent Office: 818 Days
• Field of Search: 404/133.05, 404/133.1
• US Class Current: 404/133.1
• CPC Class Codes: B06B 1/166 Where the phase-angle of masses mounted on counter-rotating shafts can be varied, e.g. variation of the vibration phase
• CPC Class Codes: E01C 19/36 with direct-acting explosion chambers
• CPC Class Codes: E02D 3/061 Tampers with directly acting explosion chambers pile drivers with explosion chambers E02D7/12

Abstract

A compactor for compacting soil which can be controlled by hand using a bow-shaped control element or similar element. The compactor has a compacting or ramming working mass which is driven by a combustion engine back and forth, linearly, by a crank mechanism and a spring assembly. The compactor is also supported on the ground by a single-axle dolly.

Claims

1. A manually guided tamping appliance for ground compaction comprising:

a tamping implement having a working mass, a crank mechanism that is spaced from the working mass, and a spring assembly that is arranged between the crank mechanism and the working mass and that couples the working mass to the crank mechanism;

an internal combustion engine which drives the working mass linearly back and forth via the crank mechanism; and

an at least single-axle traveling gear that additionally supports the tamping implement against the ground, wherein

the entire tamping element is dynamically movable as a unit relative to the traveling gear.

2. The tamping appliance as claimed in claim 1, wherein the raveling gear carries the internal combustion engine.

3. The tamping appliance as claimed in claim 1, wherein the traveling gear is provided with its own drive.

4. The tamping appliance as claimed in claim 3, wherein the traveling gear drive is convertible between forward motion and reverse motion.

5. The tamping appliance as claimed in claim 3, wherein a common power source is provided for generating the tamping movement and for driving the traveling gear.

6. The tamping appliance as claimed in claim 5, wherein the crank mechanism is driven by a hydraulic power transmission.

7. The tamping appliance as claimed in claim 6, wherein an upper mass carrying the crank mechanism is movably connected to the traveling gear via a joint system.

8. The tamping appliance as claimed in claim 7, wherein the joint system includes parallel links.

9. The tamping appliance as claimed in claim 3, wherein the traveling gear is driven via a chain drive.

10. The tamping appliance as claimed in claim 1, wherein an upper mass carrying the crank mechanism is connected at least approximately rigidly to the traveling gear.

11. The tamping appliance as claimed in claim 10, wherein the upper mass is connected to the traveling gear so as to be moveable relative to the traveling gear to a limited extent via elastic connecting elements.

12. The tamping appliance as claimed in claim 10, wherein the traveling gear is supplemented by an additional supporting wheel that is located on a side of a tamping butt of the tamping implement which faces away from a driveable axle of the traveling gear and that, together with the traveling gear, forms a three-point traveling gear.

13. A manually guided tamping appliance for ground compaction comprising:

a tamping implement having a working mass, a crank mechanism, and a spring assembly arranged between the crank mechanism and the working mass;

an internal combustion engine which drives the working mass linearly back and forth via the crank mechanism; and

an at least single-axle traveling gear that additionally supports the tamping implement against the ground, wherein the tamping implement is movable relative to the traveling gear; and

a countermass capable of being driven by the engine in the opposite direction to the movement of the working mass over a large part of the range of movement of the working mass.

14. The tamping appliance as claimed in claim 13, wherein the countermass is driven by the crank mechanism.

15. The tamping appliance as claimed in claim 14, wherein the countermass includes two part masses arranged in each case on one side of the crank mechanism or the other, at approximately the same height with respect to the axis of rotation of the crank mechanism, and each part mass is driven by an eccentric pin on an eccentric disk assigned to said part mass and is rotatably coupled to the crank mechanism, and wherein each eccentric pin is connected to the associated part mass via a slider crank.

16. The tamping appliance as claimed in claim 14, wherein the countermass comprises unbalanced masses which are mounted on an upper mass of the tamping implement so as to rotate about mutually parallel axes, which are driven in rotation in opposite directions by the crank mechanism, and of which the flywheel moment and mutual phase relationship are arranged in such a way that they generate a vibration directed in counteraction to the working mass.

17. The tamping appliance as claimed in claim 16, wherein the countermass comprises two centrifugal weights which are arranged next to one another, symmetrically to the direction of movement of the working mass, at approximately the same height in the direction of movement of the working mass, which are directly coupled to one another rotatably in opposite directions, and which are driven by the crank mechanism.

18. The tamping appliance as claimed in claim 16, wherein the countermass comprises a first centrifugal weight seated directly on the shaft of the crank mechanism and two secondary centrifugal weights of the same flywheel moment, which are arranged next to one another, symmetrically to the direction of movement of the working mass, at approximately the same height in the direction movement of the working mass, and which are driven rotatably in the opposite direction to the first centrifugal weight by the crank mechanism, and wherein the flywheel moment of each of the secondary weights is approximately half as great as the flywheel moment of the first centrifugal weight.

19. The tamping appliance as claimed in claim 16, wherein the countermass comprises a first centrifugal weight seated directly on the axis of rotation of the crank mechanism and a second centrifugal weight which is arranged behind said first centrifugal weight, which has approximately the same flywheel moment as the first centrifugal weight, and which is driven in the opposite direction to the first centrifugal weight about an axis of rotation that is offset relative to the axis of rotation of the crank mechanism in parallel with the direction of movement of the working mass.

20. The tamping appliance as claimed in claim 13, wherein the movement of the spring assembly end and the movement of the countermass are offset relative to one another with respect to the crank angle by 180°

minus a phase shift derived from design parameters of the spring assembly.

21. The tamping appliance as claimed in claim 13, wherein the countermass is guided on the upper mass in parallel with the direction of movement of the working mass.

22. The tamping appliance as claimed in claim 21, wherein the countermass is driven by a compensating eccentric on the crank mechanism.

23. The tamping appliance as claimed in claim 22, wherein the compensating eccentric drives the countermass via a connecting rod.

24. The tamping appliance as claimed in claim 22, wherein the countermass is connected to the compensating eccentric via a slider crank.

25. A manually guided tamping appliance for ground compaction comprising:

a tamping implement having a working mass and a crank mechanism that drives the working mass to reciprocate linearly;

an at least single-axle traveling gear that additionally supports the tamping implement against the ground;

an internal combustion engine that supplies drive power to the working mass;

a coupling that articulates the traveling gear to the tamping implement, the coupling being sufficiently flexible to permit limited dynamic movement of the tamping implement relative to the traveling gear; and

a countermass that is driven by the engine in the opposite direction to the direction of movement of the working mass over a large part of the range of movement of the working mass.

26. A manually guided tamping appliance for ground compaction comprising:

a tamping implement having a working mass and a crank mechanism that drives the working mass to reciprocate linearly;

an at least single-axle traveling gear that additionally supports the tamping implement against the ground;

an internal combustion engine that supplies drive power to the working mass; and

an elastic coupling that articulates the traveling gear to the tamping implement, the coupling being sufficiently flexible to permit limited dynamic movement of the entire tamping implement as a unit.

27. A tamping appliance as claimed in claim 26, wherein the engine is mounted on the traveling gear and is coupled to the tamping implement by the coupling.