EP1335800A1 - Device for the continuous adjustment of unbalance of steerable vibration plates - Google Patents
Device for the continuous adjustment of unbalance of steerable vibration platesInfo
- Publication number
- EP1335800A1 EP1335800A1 EP01997363A EP01997363A EP1335800A1 EP 1335800 A1 EP1335800 A1 EP 1335800A1 EP 01997363 A EP01997363 A EP 01997363A EP 01997363 A EP01997363 A EP 01997363A EP 1335800 A1 EP1335800 A1 EP 1335800A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unbalance
- piston
- cylinder
- liquid chambers
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
- E02D3/074—Vibrating apparatus operating with systems involving rotary unbalanced masses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18544—Rotary to gyratory
- Y10T74/18552—Unbalanced weight
Definitions
- the invention relates to a device for stepless unbalance adjustment in steerable vibration plates with an actuator designed as a piston of a hydraulic cylinder and in operative connection with the associated unbalance, a reservoir for hydraulic fluid and a pressure source comprising a feed pump for the hydraulic fluid.
- Vibratory plates that are suitable as soil compaction devices are set in motion by rotating unbalances. It is known to change the resulting forces and their direction of action by rotating the unbalances relative to one another and thereby to influence the speed of movement of the vibration plate and its direction of movement.
- the two unbalances have been set by a single-acting hydraulic cylinder, to which a return spring is assigned to generate the return force.
- the manipulated variable assigned to each hydraulic cylinder can be set as desired by increasing the pressure in each of the two cylinders until the spring has undergone a defined shortening according to its spring characteristic and in this position the hydraulic piston moving in the cylinder has a balance between hydraulic Sets force and spring force.
- the object of the invention is to enable the unbalance, which is preferably arranged on a common shaft, to be steplessly adjusted independently of external forces and moments. To do this, it is necessary to clamp the actuating piston in the actuating cylinder much more rigidly than with the conventional used coil spring is possible.
- each adjustable imbalance is assigned a double-acting hydraulic cylinder with two liquid chambers, one of which can be connected to the feed pump and the other directly to the accumulator to adjust a piston, while to fix the piston in its position, both liquid chambers can be locked against the accumulator and pump at the same time.
- Each double-acting cylinder is preferably assigned a 4/3-way valve, which is connected to a hydraulic fluid source, a fluid reservoir, and each of the two fluid chambers of the cylinder.
- each liquid chamber is connected to the 4/3-way valve via a throttle check valve.
- the example shows two double-acting hydraulic cylinders 10a and 10b, each of which serves as a servomotor in order to use a suitable mechanical connection to determine the position of an unbalance of a vibrating element carried by a shaft.
- tion plate can be optionally and continuously adjusted between two end positions.
- a piston 12a or 12b is linearly movable, on the two sides of which there are liquid chambers 14a and 16a or 14b and 16b.
- Each of the liquid chambers 14a to 16b has a line connection 18a, 20a or 18b, 20b which, via a throttle check valve 22a, 24a or 22b, 24b, to a 4/3-way valve 26a or respectively assigned to each of the cylinders 10a and 10b. 26b leads.
- Each of these 4/3-way valves 26a and 26b has four connections and three positions. The locked position is shown, in which the line connections 18a to 20b are interrupted.
- valve bodies 28a and 28b When the valve bodies 28a and 28b are shifted to the right, the line connections 18a and 18b are acted upon by pressure fluid which is conveyed from a reservoir 30 by a pump 34 which can be driven by a motor 32.
- the delivery side of the pump 34 is connected via a pressure relief valve 36 to a return line 38 leading to the accumulator 30, and via a pressure control valve 40 and a delivery line 42 to the valves 26a and 26b.
- the left liquid chambers 14a and 14b are acted upon by pressurized hydraulic fluid, which thereby displaces the pistons 12a and 12b to the right, as a result of which the liquid in the liquid chambers 16a and 16b is displaced.
- the entire displaced liquid must pass through the throttle branches of the valves 24a and 24b, which creates a resistance that brakes the piston movement in the cylinders 10a and 10b.
- the speed of the movement of the pistons 12a and 12 can be influenced by the dimensioning of the throttle branches and the delivery pressure set on the valve 40.
- the 4/3-way valve 26a or 26b is moved into the blocking position shown, with a further fluid movement between the 4/3-way valve. tilen 26a, 26b and the cylinders 10a and 10b is prevented. As a result, the pistons 12a and 12b are blocked in the position which they assumed when the valves 26a and 26b were closed.
- valve bodies in the 4/3 directional control valves 26a and 26b are moved to the left from the blocking position, the delivery line 42 is connected to the right liquid chambers 16a and 16b, while the left liquid chambers 14a and 14b are now connected to the return.
- the pistons 12a and 12b then move to the left in the drawing until the 4/3-way valves 26a and 26b are brought back into the blocking position.
- valve bodies of the 4/3-way valves 26a and 26b can be adjusted completely independently of one another, so that the respective setting of the pistons 12a and 12b is also completely independent of one another.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Agronomy & Crop Science (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Road Paving Machines (AREA)
- Reciprocating Pumps (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Pressure Circuits (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20019823U | 2000-11-22 | ||
DE20019823U DE20019823U1 (en) | 2000-11-22 | 2000-11-22 | Device for stepless unbalance adjustment with steerable vibration plates |
PCT/EP2001/013557 WO2002042010A1 (en) | 2000-11-22 | 2001-11-21 | Device for the continuous adjustment of unbalance of steerable vibration plates |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1335800A1 true EP1335800A1 (en) | 2003-08-20 |
EP1335800B1 EP1335800B1 (en) | 2005-06-08 |
Family
ID=7949144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01997363A Expired - Lifetime EP1335800B1 (en) | 2000-11-22 | 2001-11-21 | Device for the continuous adjustment of unbalance of steerable vibration plates |
Country Status (5)
Country | Link |
---|---|
US (1) | US7017679B2 (en) |
EP (1) | EP1335800B1 (en) |
JP (1) | JP3851270B2 (en) |
DE (2) | DE20019823U1 (en) |
WO (1) | WO2002042010A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2233129B1 (en) * | 2002-07-04 | 2006-07-16 | Uma Hermanos Alquezar, S.A. | VIBRATING SYSTEM BY EXCENTRIC ROTATING MASS. |
DE102004015589A1 (en) * | 2004-02-29 | 2005-09-15 | Bomag Gmbh | Controller for unbalance adjustment of vibrating soil-compactor, controls valve according to pulse-width modulation signal to set relative position of unbalance weights |
EP1568420B1 (en) | 2004-02-29 | 2018-08-15 | BOMAG GmbH | Device and method for controlling a vibrating machine |
DE102005030860A1 (en) * | 2005-07-01 | 2007-01-25 | Wacker Construction Equipment Ag | Vibrating plate system |
FR2911658B1 (en) * | 2007-01-22 | 2009-04-24 | Poclain Hydraulics Ind Soc Par | DEVICE FOR HYDROSTATIC TRANSMISSION OF A GEAR. |
US8727660B2 (en) * | 2010-04-16 | 2014-05-20 | Ammann Schweiz Ag | Arrangement for providing a pulsing compressive force |
CN113863097A (en) * | 2021-09-29 | 2021-12-31 | 徐工集团工程机械股份有限公司道路机械分公司 | Stepless amplitude modulation vibration wheel and road roller |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1566358A (en) * | 1968-02-09 | 1969-05-09 | ||
US3990522A (en) * | 1975-06-24 | 1976-11-09 | Mining Equipment Division | Rotary percussion drill |
US4105356A (en) * | 1977-05-19 | 1978-08-08 | Koehring Corporation | Vibratory roller |
DE2928870A1 (en) * | 1979-07-17 | 1981-02-12 | Koehring Gmbh Bomag Division | MASS COMPENSATED PAMPING AND / OR BLOWING SYSTEM |
IT1150232B (en) * | 1981-03-12 | 1986-12-10 | Linde Ag | COMMAND DEVICE FOR A STEERED VEHICLE WITH DIFFERENTIAL SPEED |
EP0070345A1 (en) * | 1981-07-18 | 1983-01-26 | Losenhausen Maschinenbau AG& Co Kommanditgesellschaft | Vibrator with a variable unbalanced mass |
US4694649A (en) * | 1983-02-04 | 1987-09-22 | Howeth David F | Pressure limiting acceleration control system and valve for hydraulic motors |
FR2592903B1 (en) * | 1986-01-15 | 1988-05-06 | Albaret Ind Sa | EARTHMOVING MACHINE WITH SYNCHRONIZATION BETWEEN MOVING THE MACHINE AND MOVING A MOBILE PART OF IT. |
SE453000B (en) * | 1986-06-27 | 1988-01-04 | Dynapac Ab | Vibration Plate |
DE3709112C1 (en) * | 1986-08-27 | 1988-01-28 | Knauer Maschf Gmbh | Vibrating device for a concrete block molding machine |
US4779418A (en) * | 1987-02-17 | 1988-10-25 | M-B-W Inc. | Remote control system for a soil compactor |
US4759659A (en) * | 1987-07-01 | 1988-07-26 | Fernand Copie | Variable vibrator system |
NL1008965C2 (en) * | 1998-04-22 | 1999-10-25 | Int Construction Equipment B V | Method and device for vibrating an object. |
-
2000
- 2000-11-22 DE DE20019823U patent/DE20019823U1/en not_active Expired - Lifetime
-
2001
- 2001-11-21 EP EP01997363A patent/EP1335800B1/en not_active Expired - Lifetime
- 2001-11-21 JP JP2002544179A patent/JP3851270B2/en not_active Expired - Fee Related
- 2001-11-21 WO PCT/EP2001/013557 patent/WO2002042010A1/en active IP Right Grant
- 2001-11-21 US US10/416,874 patent/US7017679B2/en not_active Expired - Fee Related
- 2001-11-21 DE DE50106474T patent/DE50106474D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0242010A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1335800B1 (en) | 2005-06-08 |
DE20019823U1 (en) | 2001-02-08 |
JP3851270B2 (en) | 2006-11-29 |
WO2002042010A1 (en) | 2002-05-30 |
US7017679B2 (en) | 2006-03-28 |
US20040035104A1 (en) | 2004-02-26 |
DE50106474D1 (en) | 2005-07-14 |
JP2004514078A (en) | 2004-05-13 |
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