EP2960374B1 - Appareil de travail doté d'un moulin à bocards ou d'un outil de percussion ayant une transmission à bielle oblique - Google Patents

Appareil de travail doté d'un moulin à bocards ou d'un outil de percussion ayant une transmission à bielle oblique Download PDF

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Publication number
EP2960374B1
EP2960374B1 EP15172130.5A EP15172130A EP2960374B1 EP 2960374 B1 EP2960374 B1 EP 2960374B1 EP 15172130 A EP15172130 A EP 15172130A EP 2960374 B1 EP2960374 B1 EP 2960374B1
Authority
EP
European Patent Office
Prior art keywords
working
axis
motor
crank
drive
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.)
Not-in-force
Application number
EP15172130.5A
Other languages
German (de)
English (en)
Other versions
EP2960374A1 (fr
Inventor
Helmut Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wacker Neuson Produktion GmbH and Co KG
Original Assignee
Wacker Neuson Produktion GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wacker Neuson Produktion GmbH and Co KG filed Critical Wacker Neuson Produktion GmbH and Co KG
Publication of EP2960374A1 publication Critical patent/EP2960374A1/fr
Application granted granted Critical
Publication of EP2960374B1 publication Critical patent/EP2960374B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/35—Hand-held or hand-guided tools
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
    • E01C23/124—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus moved rectilinearly, e.g. road-breaker apparatus with reciprocating tools, with drop-hammers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221—Sensors

Definitions

  • the invention relates according to claim 1, a working device, for example, for compacting, ramming, hitting or breaking.
  • a rammer for soil compaction serving as an implement in which a ground contact plate is set in swinging motion.
  • a stamping unit is provided, which is driven by a drive motor.
  • Other implements are, for example, break hammers in which a percussion drive is driven by a drive motor, which acts on a tool, for example a chisel.
  • the stamping works or percussion often have a basically similar structure.
  • the rotational movement of the drive motor via a crank mechanism and a connecting rod in an axial (linear) reciprocating motion of a drive piston coupled to the connecting rod is converted.
  • the movement of the drive piston in turn is usually transmitted via a spring device to the actual tool, for example, the ground contact plate or the chisel.
  • spring means metallic springs, such as coil springs, but also air springs can be used.
  • the properties of air springs have proved to be particularly suitable, while in stamping plants preferably metal springs are used.
  • the single impact energy can only vary by changing the drive speed. For example, to reduce the single impact energy, the drive or motor speed must be reduced. This has the disadvantage that the beat frequency, ie the number of beats per unit time is reduced, causing the tamper slower or a hammer beats less often. Thus, as desired, the single impact energy can be reduced, but also the overall performance of the device is unnecessarily greatly reduced.
  • crank pin represents the connection between the crank mechanism and the connecting rod.
  • a variability of the radius of the crank pin requires a complex mechanism, which can be disadvantageous.
  • EP 2 017 038 A1 is a hand tool with pneumatic percussion known, in which a piston is displaceable over a eccentrically mounted on an eccentric connecting rod in a reciprocating motion.
  • the axis of rotation of the eccentric wheel is spaced at a distance perpendicular to the impact axis.
  • the invention has for its object to provide an implement in which in a simple manner the single impact energy is variable without the beat frequency, ie the number of strokes or strokes per unit time is changed.
  • crank axis and the working axis are aligned with each other, so that the crank axis intersects the working axis, this is not the case with the working device according to the invention.
  • crank axle is arranged in a plane which is perpendicular to the working axis, wherein the crank axle and the working axle are arranged with an offset (Deachs réelle) to each other.
  • the working axis is usually also the axis of movement of the drive piston driven tool, so for example the stamp axis or the striking axis. It corresponds to a main axis or central axis of the implement.
  • the offset creates the effect that the drive piston moves at different speeds linearly, depending on the direction of rotation of the crank mechanism and whether the crank pin belonging to the crank pin connecting the crank mechanism with the connecting rod, in its movement in the working direction (direction of impact, tamping direction ) moves on the side of the offset or on the opposite side.
  • the crank mechanism and thus the drive piston moves faster in the working direction than in one Crank mechanism without misalignment, so that an increased single impact energy can be generated.
  • an increased single impact energy can be achieved at the same drive speed and thus constant beat frequency.
  • crank pin When the engine rotation direction and thus the driving rotational direction of the crank gear is reversed, the crank pin is in the drive direction (working direction) on the side opposite to the offset when driving the drive piston, whereby the drive piston is moved slower. This leads to a reduction of the single impact energy.
  • the energy from the crank mechanism is transmitted to the tool via the spring device when the drive piston moves in the working direction, ie in the direction of the bottom or in the direction of the material to be processed.
  • the crank pin of the crank mechanism move on the side of the offset in the working direction. Reversing the direction of rotation of the drive will cause the crankpin to move in the direction of operation on the opposite side of the drain, where the drive piston is forced to lower speed, resulting in lower single impact energy.
  • the drive has a motor whose direction of rotation is reversible.
  • the motor may thus be, in particular, an electric motor, in which a reversal of the direction of rotation can be realized at any time without problems.
  • an energy store can be provided for supplying the electric motor with electrical energy.
  • a motor axis serving as a rotation axis of the motor may be arranged in a plane which is perpendicular to the working axis, wherein the motor axis and the working axis are either arranged so that they are spaced apart with respect to each other, or wherein the motor axis and the working axis arranged they can be cut.
  • the energy store can be arranged on the implement in order to compensate for a weight shift resulting from the offset of the crank axis and / or the motor axis with respect to the working axis.
  • a transmission is provided between the engine and the crank mechanism to transmit the torque from the engine shaft to the crank mechanism.
  • the engine speed can be over or understated.
  • An input device may be provided for prescribing a direction of rotation of the motor and / or a speed of rotation of the motor by an operator.
  • the direction of rotation plays an essential role in the setting of the single impact energy.
  • the location of the crankpin as the drive piston advances in the tooling direction achieves greater or lesser single impact energy.
  • the operator can influence not only the single impact energy but also the total impact power over a certain period of time. For example, it may be advantageous to work with a low single beat energy but a higher beat rate.
  • the operator thus has the option of more precisely adapting the single impact energy and the total energy to the respective substrate to be worked.
  • the coarse adjustment of the single impact energy can be made.
  • the variation of the speed then takes the fine adjustment. It is thus possible to adjust the single impact energy over a wide range, without the implement would be uncomfortable to use because of too high or too low speeds.
  • a controller may be provided for changing the direction of rotation of the motor and / or for changing the speed of the motor. While in the variant described above, the operator can make the respective setting, it is possible in the variant described now to have the setting automatically carried out by the controller. Thus, the controller can automatically adjust the speed of the motor to the respective ground, but for example, the preselection of the operator with respect to the direction of rotation of the motor is observed. For example, it may be provided that there is no change in the direction of motor rotation, even if the controller recognizes that a higher or more favorable compression would be achieved with the other direction of rotation.
  • the working movement may be imposed on a tool coupleable to the drive piston, wherein detection means may be provided for detecting a state of the substrate being processed by the tool due to a response of the tool during a work operation.
  • detection means may be provided for detecting a state of the substrate being processed by the tool due to a response of the tool during a work operation.
  • a controller may be provided for automatically changing the rotational speed of the motor as a function of the detected state of the substrate by the detection device, wherein an input device may be provided for setting a direction of rotation of the motor by the operator.
  • the drive piston may act on a motion conversion device for transmitting movement of the drive piston to a tool coupled to the motion conversion device.
  • the movement-changing device can, for example, have a spring device in order to convert the rigid sinusoidal movement of the drive piston into a movement of the tool which is more suitable for the working operation, that is to say in particular a stamping or striking movement.
  • the implement may be a soil compaction device, for example a rammer, in which case the motion conversion device has a stamping unit.
  • the implement may be a percussion device, in which case the motion conversion device has a percussion mechanism.
  • crank radius can be fixed by the crank mechanism and in particular the distance of the crank pin (connecting rod) to the crank axis, ie the crank radius.
  • the Deachstician is fixed in one embodiment and fixed.
  • the Deachstician can also be realized variably, so that the operator at least when presetting the implement has the opportunity to exert over the Deachs réelle, ie the axial offset of the crank axle and drive axle, a coarse impact on the later desired single impact energy.
  • a change of the Deachs ist can be achieved for example by the impactor or stamping unit with its surrounding housing is displaceable perpendicular to the working axis relative to the crankcase surrounding the crankcase.
  • the distance between the working axis and the crank axis ie the Deachstechnik can be selected in a suitable manner and in dependence on the other machine parameters.
  • the override may be in a range between zero and crank radius, where crank radius is the distance between a crankpin driving the connecting rod and the crank axle.
  • the Deachs réelle can be about half of the crank radius or in a range between 5 and 50% of the crank radius.
  • Fig. 1 shows the drive system of a rammer for soil compaction.
  • the drive system has an electric motor 1 serving as a drive, with a motor axis 2. Coaxially to the motor shaft 2 extends a motor shaft, not shown, on which a drive pinion 3 is arranged.
  • the drive pinion 3 drives a crank mechanism 4 with a crank disk 5, on which a crank pin 6 is arranged.
  • the crank mechanism 4 is rotatable about a crank axis 7 and is rotationally driven by the drive pinion 3.
  • a toothing is provided externally on the crank disc 5, in which the drive pinion 3 can engage.
  • crank pin 6 is coupled to a connecting rod 8, which in turn is connected via a connecting rod 9 with a drive piston 10 hinged.
  • the drive piston 10 in a guide 11 axially and linear back and forth guided.
  • the drive piston has a collar 12, against which rest above and below spring assemblies 13 which transmit the reciprocating motion of the drive piston 10 on a stand 14 with a bottom contact plate 15.
  • the soil contact plate 15 is finally used in a known manner of soil compaction.
  • the reciprocating motion of the drive piston 10 defines a working axis 16, along which also the padfoot 14 serving as a tool can be moved back and forth.
  • crank axis 7 is arranged in a plane which is perpendicular to the working axis 16.
  • crank axis 7 and the working axis 16 with an offset, ie a Deachstechnik V arranged to each other.
  • Fig. 1 shows the Deachs ist V be about half of the crank radius, wherein the crank radius is the distance between the crank axis 7 and a central axis 6a of the crank pin 6.
  • the crank radius is the distance between the crank axis 7 and a central axis 6a of the crank pin 6.
  • a different value between zero and the crank radius may also make sense.
  • Fig. 2 shows the same drive system, but in a mode in which the direction of rotation D 'is reversed to the direction of rotation D.
  • the crank pin 6 is located on the opposite side of the Deachstechnik V.
  • crank pin 6 causes the drive piston 10 to be lowered over a larger angular range when the direction of rotation D 'is reversed relative to the direction of rotation D, so that the latter moves downwards at a lower speed.
  • crank pin 6 passes over a smaller angular cut-out, as a result of which the drive piston 10 is moved back relatively quickly, ie, upwards.
  • Fig. 3 shows the drive system of a demolition hammer with a striking mechanism.
  • the connecting rod 8 drives the drive piston 10, which is within the guide 11 back and forth.
  • a percussion piston 17 Coaxially with the drive piston 10, a percussion piston 17 which can be moved freely back and forth is provided which strikes the end of a chisel 18 serving as a tool. Between the drive piston 10 and the percussion piston 17, an air spring 19 is formed in a known manner, which transmits the sine movement of the drive piston 10 in the striking motion of the percussion piston 17.
  • the structure of such impact mechanism is widely known from the prior art, so that a further description is not required.
  • Both the direction of rotation of the electric motor 1 and its speed can be changed depending on the embodiment.
  • corresponding input means may be provided with the aid of which the operator can change the direction of rotation and / or the rotational speed. It is also possible that the operator determines only the direction of rotation via an input means, while the speed through an automatic control is set depending on the nature of the material to be processed.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Soil Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (11)

  1. Engin de travail avec
    - un dispositif d'entraînement (1) ;
    - un mécanisme à manivelle (4), entraîné par le dispositif d'entraînement (1), qui peut tourner autour d'un axe de manivelle (7) ; et avec
    - un piston d'entraînement (10), entraîné par le mécanisme à manivelle (4) par l'intermédiaire d'une bielle (8), pouvant être déplacé avec un mouvement de va-et-vient le long d'un axe de travail (16), pour la réalisation d'un mouvement de travail ;
    - l'axe de manivelle (7) et l'axe de travail (16) étant disposés de façon à ce qu'ils ne se coupent pas ;
    - le dispositif d'entraînement (1) comprenant exactement un moteur, dont le sens de rotation peut être inversé ; et
    - un dispositif de commande étant prévu pour la modification du sens de rotation du moteur (1) et/ou pour la modification de la vitesse de rotation du moteur (1).
  2. Engin de travail selon la revendication 1,
    - l'axe de manivelle (7) étant disposé dans un plan qui est perpendiculaire à l'axe de travail (16) ; et
    - l'axe de manivelle (7) et l'axe de travail (16) étant disposés avec un décalage entre eux.
  3. Engin de travail selon la revendication 1 ou 2, le moteur étant un moteur électrique.
  4. Engin de travail selon la revendication 3, un accumulateur d'énergie étant prévu pour l'alimentation du moteur électrique en énergie électrique.
  5. Engin de travail selon l'une des revendications précédentes,
    - un axe de moteur (2) servant d'axe de rotation du moteur (1) étant disposé dans un plan qui est perpendiculairè à l'axe de travail (16) ;
    - l'axe de moteur (2) et l'axe de travail (16) étant disposés de façon à ce qu'ils soient distants entre eux avec un décalage ; ou
    - l'axe de moteur (2) et l'axe de travail (16) étant disposés de façon à ce qu'ils se coupent.
  6. Engin de travail selon l'une des revendications précédentes, le centre de gravité de l'ensemble de l'engin de travail se trouvant, dans un étant prêt à fonctionner, sur l'axe de travail (16).
  7. Engin de travail selon l'une des revendications précédentes, l'accumulateur d'énergie étant disposé sur l'engin de travail afin de compenser un décalage du poids qui résulte du décalage de l'axe de manivelle (7) et/ou de l'axe du moteur (2) par rapport à l'axe de travail (16).
  8. Engin de travail selon l'une des revendications précédentes, un dispositif d'entrée étant prévu, pour la détermination d'un sens de rotation du moteur (1) et/ou d'une vitesse de rotation du moteur (1) par un opérateur.
  9. Engin de travail selon l'une des revendications précédentes,
    - le mouvement de travail étant imposé à un outil (14, 18) pouvant être couplé au piston d'entraînement (10) ;
    - un dispositif de détection étant prévu, pour la détection d'un état du sol traité par l'outil (14, 18) sur la base d'un comportement de réponse de l'outil (14, 18) pendant un fonctionnement ;
    - un dispositif de commande étant prévu pour la modification automatique de la vitesse de rotation du moteur (1) en fonction de l'état du sol détecté par le dispositif de détection ; et
    - un dispositif d'entrée étant prévu pour la détermination d'un sens de rotation du moteur (1) par un opérateur.
  10. Engin de travail selon l'une des revendications précédentes, le piston d'entraînement (10) agissant sur un dispositif de conversion de mouvement (13, 17, 19) pour la transmission du mouvement du piston d'entraînement à un outil (14, 18) couplé au dispositif de conversion de mouvement.
  11. Engin de travail selon l'une des revendications précédentes,
    - l'engin de travail étant un dispositif de compactage de sol et le dispositif de conversion de mouvement comprenant un moulin à brocards ; ou
    - l'engin de travail étant un dameur et le dispositif de conversion de mouvement est un dispositif à percussion.
EP15172130.5A 2014-06-23 2015-06-15 Appareil de travail doté d'un moulin à bocards ou d'un outil de percussion ayant une transmission à bielle oblique Not-in-force EP2960374B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014009375.1A DE102014009375A1 (de) 2014-06-23 2014-06-23 Arbeitsgerät mit Stampfwerk oder Schlagwerk mit verschränktem Kurbeltrieb

Publications (2)

Publication Number Publication Date
EP2960374A1 EP2960374A1 (fr) 2015-12-30
EP2960374B1 true EP2960374B1 (fr) 2018-06-06

Family

ID=53433073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15172130.5A Not-in-force EP2960374B1 (fr) 2014-06-23 2015-06-15 Appareil de travail doté d'un moulin à bocards ou d'un outil de percussion ayant une transmission à bielle oblique

Country Status (2)

Country Link
EP (1) EP2960374B1 (fr)
DE (1) DE102014009375A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106049247B (zh) * 2016-05-31 2018-01-23 泰州市光明电子材料有限公司 一种机械式钎杆触发破碎锤
CN108442373A (zh) * 2018-05-15 2018-08-24 浙江嘉宏运动器材有限公司 电动打桩机
CN112982361A (zh) * 2021-03-08 2021-06-18 广东电网有限责任公司 一种锤击装置
CN114526375A (zh) * 2022-02-18 2022-05-24 中铁北京工程局集团有限公司 一种保护市政管线的施工方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE410873B (sv) * 1977-04-14 1979-11-12 Dynapac Maskin Ab Vibratorstamp
DE102007000393A1 (de) * 2007-07-19 2009-01-22 Hilti Aktiengesellschaft Handwerkzeugmaschine mit pneumatischem Schlagwerk
DE102008035298A1 (de) 2008-07-29 2010-02-04 Wacker Neuson Se Luftfederschlagwerk mit variablem rotatorischem Antrieb
DE102010052243A1 (de) * 2010-11-23 2012-05-24 Wacker Neuson Produktion GmbH & Co. KG Stampfvorrichtung mit Synchronisationseinrichtung und Verfahren dafür

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE102014009375A1 (de) 2015-12-24
EP2960374A1 (fr) 2015-12-30

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