WO1999001260A1 - Marteau de demolition et/ou marteau foreur dote d'un embrayage a point mort - Google Patents

Marteau de demolition et/ou marteau foreur dote d'un embrayage a point mort Download PDF

Info

Publication number
WO1999001260A1
WO1999001260A1 PCT/EP1998/003925 EP9803925W WO9901260A1 WO 1999001260 A1 WO1999001260 A1 WO 1999001260A1 EP 9803925 W EP9803925 W EP 9803925W WO 9901260 A1 WO9901260 A1 WO 9901260A1
Authority
WO
WIPO (PCT)
Prior art keywords
hammer drill
clutch
tool
percussion
drive
Prior art date
Application number
PCT/EP1998/003925
Other languages
German (de)
English (en)
Inventor
Wolfgang Schmid
Original Assignee
Wacker-Werke Gmbh & 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-Werke Gmbh & Co. Kg filed Critical Wacker-Werke Gmbh & Co. Kg
Publication of WO1999001260A1 publication Critical patent/WO1999001260A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003—Clutches specially adapted therefor

Definitions

  • the invention relates to a hammer and / or hammer drill according to the preamble of claim 1.
  • Impact and / or rotary hammers are usually used to process rocks of different degrees of hardness.
  • hammers For the functioning of the hammer mechanism present in the hammer, it is necessary that the hammer piston arranged in the hammer mechanism experiences a recoil via the tool, which drives the hammer piston back into its starting position.
  • Air spring striking mechanisms with single-sided, double-acting air springs, in particular today, have proven to be very recoil-dependent and can usually only be optimally designed for one recoil number, i.e. for certain parameters that result from the hammer geometry, the working speeds and the type of rock.
  • the functionality of such striking mechanisms depends on the density of the ambient air at the place of use.
  • the idling in double air springs is characterized by extremely strong vibrations of the hammer, which is particularly uncomfortable for the operator when chiseling, in which the hammer is often lifted off the rock, and also leads to increased wear.
  • the reason for this is that even in idle mode, in which the tool is lifted off the rock, the entire striking mechanism is still in motion and, because of the vibrating masses, requires high holding forces for the hammer.
  • the percussion piston is caught by the front air spring even when idling and accelerated backwards.
  • From DE 27 57 008 C2 is a hammer and / or hammer drill with a drive, a rotary movement converting device that can be coupled to the drive, an electromagnetically switched clutch arranged between the drive and the converting device, an impact mechanism driven by the converting device and with one of the impacted tool known.
  • the electrical The magnetic coupling can be actuated manually by means of a switch, so that the power flow between the drive and the striking mechanism can be established at the operator's request. To do this, the operator must actively control the machine, ie switch off the engine and / or the clutch.
  • the invention has for its object to provide a hammer and / or hammer drill, in which the occurrence of strong vibrations is avoided when idling.
  • the solution according to the invention makes it possible for the tool to reach an idle position when it is lifted off the rock to be machined and to take the associated actuator with it, whereby the clutch is actuated, which in turn interrupts the flow of force between the drive and the striking mechanism or converting device.
  • the clutch is actuated, which in turn interrupts the flow of force between the drive and the striking mechanism or converting device.
  • the tool is placed on the rock to continue the work, the tool is moved into the striking position. This displacement movement is also transferred to the actuator, which closes the clutch and thus the flow of force between the drive and the converting device.
  • the switching device described according to the invention can be used for any type of hammer mechanism. It is particularly advantageous for air spring striking mechanisms, where both air springs with one-sided air spring and double air spring can be used. With double air spring striking mechanisms in particular, strong vibrations can be avoided in idle mode.
  • the actuator can advantageously be moved by a striker arranged on the tool, but separated from it. This simplifies the tool change, since the tool does not have to be coupled directly to the actuator.
  • the tool, the striker and the actuator are held in an idling position by a spring device and can be moved into the striking position against the action of the spring device.
  • This enables the tool with the striking tool and the actuator to be held in the idle position in a defined manner, as long as the tool is not acted upon from outside by being placed on the rock to be machined.
  • the tool and thus the striker and the actuator move against the spring force in the direction of the hammer housing, whereupon the clutch can be closed.
  • the actuator advantageously acts on a switching mechanism of the clutch.
  • the clutch is a wrap spring clutch.
  • a wrap spring clutch is low-wear, easy to manufacture and very robust, which makes it ideal for use in a hammer.
  • the actuator comprises a control plunger which can be retracted against a clutch hook of the clutch in order to open the wrap spring clutch. This enables the clutch to be opened immediately since the wrap spring is lifted off the shaft to be clamped, which immediately interrupts the flow of force.
  • the clutch can be a cone, a claw, a disk or a multi-plate clutch.
  • the drive is advantageously a high-frequency three-phase motor, while the striking mechanism is an air spring striking mechanism.
  • the air spring striking mechanism has a double-acting air spring.
  • FIG. 1 shows a schematic cross section of an impact hammer according to the invention.
  • a gearwheel 1 Via a high-frequency three-phase motor, not shown in the figure and serving as a drive, a gearwheel 1 is driven, which drives a crankshaft 4 via a hollow shaft 2 and a wrap spring clutch 3 described later in detail.
  • the crankshaft 4 is part of a crank drive serving as a rotary motion converting device and drives a drive piston 7 of a double air spring hammer mechanism via a crank pin 5 and a connecting rod 6, the rotary motion of the crankshaft 4 being converted into an oscillating translational motion of the drive piston 7.
  • the drive piston 7 is hollow and receives an impact piston 8 in its interior.
  • the drive piston 7 is designed such that a first, front air spring 9 and a second, rear air spring 10 are formed in front of and behind the percussion piston 8.
  • double air spring The configuration of the drive piston 7 can only be seen schematically in the figure; a more detailed description is omitted, since this is not the subject of the invention, but is generally known to the person skilled in the art.
  • the striking die 1 1 strikes a tool 13 (not shown) held in the housing, which can be a chisel, for example.
  • the tool 13 is axially movable in the housing between an idle position and an impact position shown in the figure together with the striking die 1 1.
  • the tip of the tool 13 is placed on the rock to be machined and thus moved into the interior of the housing with the striker 11, which is also axially movable.
  • the percussion piston 8 can reach the striking die 1 1, whereby the percussion operation is resumed.
  • the striker support sleeve 12 is acted upon by a spring 14 supported on the housing, which forces the striker support sleeve 12, the striker 11 and the tool 13 in the idle position. Only due to the greater force when the hammer is placed on the rock do the parts move against the action of the spring 14 into the interior of the housing.
  • An actuator 15 is connected to the striker support sleeve 12 and transmits the axial movement of the striker support sleeve 12 and thus also the striker 11 and the tool 13 to a switching mechanism 16 of the wrap spring clutch 3.
  • the switching mechanism 16 is realized in that it is designed like a coupling hook into which one end 17 of the actuator 15 can engage when the actuator 15 is shifted to the idle position.
  • coupling types e.g. Cone, claw, disc or multi-plate clutches also conceivable other switching mechanisms.
  • the wrap spring clutch 3 has a pretensioned wrap spring which is wound around the crankshaft 4 and the outer circumference of the hollow shaft 2 and thus transmits the drive power from the drive to the crank drive in a frictional manner. Due to the underlying principle of rope friction, the transmissible torques are very large.
  • the tool 13 When the tool is put back in the striking position (shown in the figure), the tool 13, the striker 11, the striker support sleeve 12 and the actuator 15 move backwards, i.e. into the interior of the housing of the hammer, whereby the end 17 of the actuator 15 disengages from the coupling hook 16. Due to the pretensioning of the wrap spring, the wrap spring clutch 3 closes immediately and the operation of the crank mechanism and the air spring striking mechanism is resumed.
  • the hammers according to the invention are not only characterized by better and less vibration idling than is the case with known striking mechanisms with a one-sided air spring.
  • the striking mechanisms are no longer subjected to as much load when idling as was the case with earlier striking mechanisms with double air springs.
  • the hammers and percussion mechanisms work independently of recoil, are start-safe even at very low temperatures, allow the design of a club shape that is ideal from the perspective of impact theory, allow the construction of an extremely powerful hammer with the lowest possible limit pressure and thus the lowest possible weight no sealing elements in the striking mechanism area and therefore work practically wear-free.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Abstract

L'invention concerne un marteau de démolition et/ou un marteau foreur présentant un embrayage (3) qui est embrayable par application d'un outil (13) sur une roche à traiter ou par son retrait, et qui interrompt ou permet le transfert de puissance entre un mécanisme d'entraînement et une transmission à manivelle (4, 5, 6). Lors de l'interruption du transfert de puissance (point mort), la transmission à manivelle tout comme le mécanisme de percussion pneumatique relié à cette transmission à manivelle sont mis à l'arrêt. Cela permet d'éviter des vibrations gênantes.
PCT/EP1998/003925 1997-07-04 1998-06-26 Marteau de demolition et/ou marteau foreur dote d'un embrayage a point mort WO1999001260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19728727.1 1997-07-04
DE1997128727 DE19728727C1 (de) 1997-07-04 1997-07-04 Schlag- und/oder Bohrhammer mit Leerlaufkupplung

Publications (1)

Publication Number Publication Date
WO1999001260A1 true WO1999001260A1 (fr) 1999-01-14

Family

ID=7834728

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/003925 WO1999001260A1 (fr) 1997-07-04 1998-06-26 Marteau de demolition et/ou marteau foreur dote d'un embrayage a point mort

Country Status (2)

Country Link
DE (1) DE19728727C1 (fr)
WO (1) WO1999001260A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108032449A (zh) * 2016-12-05 2018-05-15 河南高盛企业管理咨询有限公司 一种矿物矿石切割装置
CN108505994A (zh) * 2018-03-30 2018-09-07 李淑娟 一种矿用钻击锤一体式开凿设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136515C2 (de) * 2001-07-26 2003-10-23 Wacker Construction Equipment Bohr- und/oder Schlaghammer mit Handgriff

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2166946A5 (fr) * 1971-12-28 1973-08-17 Impex Essen Vertrieb
US4095654A (en) * 1976-11-15 1978-06-20 Ross Frederick W Impact device with multiple connecting rods and gearing
DE3731244A1 (de) * 1987-09-17 1989-03-30 Bosch Gmbh Robert Handwerkzeugmaschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757008C2 (de) * 1977-12-21 1982-04-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Pneumatischer Bohrhammer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2166946A5 (fr) * 1971-12-28 1973-08-17 Impex Essen Vertrieb
US4095654A (en) * 1976-11-15 1978-06-20 Ross Frederick W Impact device with multiple connecting rods and gearing
DE3731244A1 (de) * 1987-09-17 1989-03-30 Bosch Gmbh Robert Handwerkzeugmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108032449A (zh) * 2016-12-05 2018-05-15 河南高盛企业管理咨询有限公司 一种矿物矿石切割装置
CN108505994A (zh) * 2018-03-30 2018-09-07 李淑娟 一种矿用钻击锤一体式开凿设备
CN108505994B (zh) * 2018-03-30 2020-07-24 温岭市城北鑫龙鞋厂 一种矿用钻击锤一体式开凿设备

Also Published As

Publication number Publication date
DE19728727C1 (de) 1999-02-18

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