EP1425138B1 - Bohr- und/oder schlaghammer mit anpressdruckabhängiger leerlaufsteuerung - Google Patents
Bohr- und/oder schlaghammer mit anpressdruckabhängiger leerlaufsteuerung Download PDFInfo
- Publication number
- EP1425138B1 EP1425138B1 EP02777083A EP02777083A EP1425138B1 EP 1425138 B1 EP1425138 B1 EP 1425138B1 EP 02777083 A EP02777083 A EP 02777083A EP 02777083 A EP02777083 A EP 02777083A EP 1425138 B1 EP1425138 B1 EP 1425138B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hammer
- percussion
- handle
- drive piston
- housing
- 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.)
- Expired - Lifetime
Links
- 238000009527 percussion Methods 0.000 title claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 2
- 239000011796 hollow space material Substances 0.000 claims 4
- 238000005259 measurement Methods 0.000 claims 1
- 239000011435 rock Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000009191 jumping Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/04—Handles; Handle mountings
- B25D17/043—Handles resiliently mounted relative to the hammer housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/003—Crossed drill and motor spindles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/06—Means for driving the impulse member
- B25D2211/068—Crank-actuated impulse-driving mechanisms
-
- 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
- B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves
-
- 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
- B25D2250/131—Idling mode of tools
-
- 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 to a drill and / or percussion hammer according to the The preamble of claim 1.
- Such a hammer and / or percussion hammer is e.g. from the DE-A-19847687 or DE-A-19713154.
- a drill and / or hammer - hereinafter referred to as a hammer - usually has an air spring impact, in which a drive piston by an electric motor by means of a crank or wobble shaft drive is placed in an oscillating float.
- a percussion piston In front of the drive piston is a percussion piston arranged so that between the drive piston and the percussion piston is a cavity in which a Can form air spring.
- the air spring transmits the float of the drive piston on the percussion piston and drives this on the shaft a tool (chisel) or an intermediate striker.
- a tool chisel
- an intermediate striker such Hammers are known in various embodiments.
- the relative movement of the tool becomes Hammer housing either directly or via an intermediate piston on a transmitted spring-loaded control sleeve.
- the control sleeve acts with control bores together, which open and close an idle air duct can be that of the air spring receiving cavity between Drive and percussion piston connects with the environment.
- the move the control sleeve thus allows the cavity with the environment of the Schlagtechniks in communicating connection to bring or such Disconnect.
- the ventilation of the air spring cavity can be the change between idle mode and impact mode realize very reliable.
- the speed of the drive motor and thus the Beat number can remain virtually unchanged, unlike the above described speed reduction very quickly a tool stop giving Centering produced in the material to be processed.
- the operator can set the single impact strength for each individual application case optimally determine.
- Breaking hammers have the option of putting the tool on the ground set down and support the entire hammer on the tool, without leaving the idling mode. Only when the hammer is pressed down by the operator to use the impact mode.
- the invention is based on the object, a drill and / or percussion hammer specify the Bauert mentioned, in which when pressing the hammer on the machined Rock a suitable circuit a reliable change between Idle and percussion ensures without the operator applied pressure increases excessively.
- Drill and hammer - hereinafter referred to as hammer - has - as well known hammers - an idle channel for connecting a formed between a drive piston and a percussion piston Cavity with the environment up.
- a valve for Open and close the idle channel provided in the idle passage.
- the hammer characterized in that in the power flow between the grip point and the hammer housing detecting means for detecting arranged on the handle applied pressure force by the operator is and that the valve depending on the detected pressing force is controllable.
- the detection device is therefore arranged at a location where possible Immediately the applied by the operator pressure force can be detected can. Thus, it is much more direct, than in the prior art is possible to capture the desire of the operator by applying the Pressing force to move the hammer from idling to impact mode.
- the detection device can be realized in various forms. So it is z. B. in one embodiment of the invention possible, the handle movable relative to the hammer housing against the action of a spring system respectively. In this case, one acting on the handle corresponds Pressing force of a relative displacement between the handle and the Hammer housing. On the other hand, the detection device can also by a suitable sensor can be realized. In any case, the mechanical serves or mechatronically detected pressing force as a criterion for driving the valve, over which the cavity in the air spring impact with the environment can be associated.
- a spring system provided to the handle relative to the hammer housing with a given spring force hold.
- the pressing force can be determined by one of the pressing force proportional displacement of the handle relative to the hammer housing is detected.
- the spring system is in a particularly advantageous embodiment of the Invention Component of a device for vibration damping of Handle.
- Invention Component of a device for vibration damping of Handle namely are embodiments known in which the handle to be held by the operator vibrationally decoupled from the rest of the hammer housing to a certain extent To achieve damping and relieve the operator.
- In these handle designs is the required relative mobility between handle and hammer housing already realized, so that only the pressure force proportional relative displacement must be detected.
- a particularly advantageous embodiment of the invention is a provided axially movable sleeve, which in principle from the state of Technique known control sleeve corresponds and a control of the valve forms.
- the axial position of the sleeve is dependent changeable by the force applied by the operator pressing force.
- the control sleeve could only by shift the relative displacement between tool and hammer housing, what - as described above - due to the different acting weight forces and correspondingly sized springs for supporting the Control sleeve to a significant increase to be applied by the operator Pressing force led.
- the sleeve with the handle connected positively in the axial direction, so that by the operator applied pressing force proportional relative displacement of the handle relative to the hammer housing directly as a relative displacement of Sleeve can be transmitted to the housing.
- the described solution is basically for all known types of Heilfeder Farbwerken suitable. These include z. B. pipe impactors, in which the drive piston and the percussion piston of the same diameter in one Pipe are arranged axially movable. Also is a hollow bat impact mechanism known, in which the percussion piston is hollow and in its interior receives the drive piston axially movable.
- a particularly advantageous embodiment of the invention relates a hollow piston percussion, in which the drive piston is hollow and receives in its interior the percussion piston axially movable.
- the drive piston is radially surrounded by the sleeve, which in turn in a Schlagwerksgephaseuse is guided.
- sleeve and in Schlagtechniksgephaseuse openings or recesses are provided, which together form the idle channel.
- the sleeve serves as a control of the valve and is capable of the connection between the cavity in the Inside the drive piston and the environment of the air spring impact in Depending on their axial position to open or close.
- the Detection device on a sensor with which the on the handle acting pressing force, in particular by the action of the handle can be detected against the hammer housing via the spring system.
- the sensor provides a pressure signal to a controller corresponding to the valve element activates to open and close the valve.
- the senor is a proximity sensor or a force measuring sensor is to reliably detect the acting pressing force to be able to.
- a position sensor intended to capture the location of the hammer in the room and generate a corresponding position signal.
- the position signal is the Supplied control, which then the Andrücksignal a correction, to z. B. exclude unwanted weight forces. Is working the operator z. B. with the hammer down, he does not have the hammer in the hand, but can support it on the ground. Vice versa When working up, the operator has the weight of the hammer complete to support the handle. This weight can be influenced by the Position sensor can be eliminated.
- the core idea of the invention is to make a soft application for the hammer allow for onset of impact operation when the tool only lightly pressed on the rock to be processed. Accordingly should at this time acting on the tool power be very low and be increased only with stronger pressing. This allows the tool despite full speed of the drive motor Precise positioning without it jumping off the rock to be processed.
- FIGs. 1A to 3B show the hammer according to a first embodiment in different modes and zoomed out. Of the Hammer according to the second embodiment is shown in Figs. 4 to 5B. First, the hammer according to the first embodiment with reference to Fig. 1A and 1B explained.
- a handle 2 On a hammer housing 1, a handle 2 is axially displaceable via spring systems 3 attached. At the front end of the hammer housing 1 is a further handle 4 attached, but without meaning to the invention is and only serves to better guide the hammer.
- the spring system 3 it may be z. B. be an anti-vibration system, with the acting on the handle 2 and by the Luftfedertschwerk or the effect of the tool generated vibrations and Collisions on the handle 2 and thus on the one handle position 2b of the handle 2 embracing hand of the operator be mitigated.
- the one Displacement of the handle 2 relative to the handle 4 allows, due the force acting on the handle 2 via a proportional relationship pressing force can be determined.
- a main switch 5 for on and Turn off the hammer provided in the interior of the handle 2, inter alia, a main switch 5 for on and Turn off the hammer provided.
- a power cord 6 closes at the Handle 2 a power cord 6 on.
- a Electric motor 7 is arranged, which drives a crankshaft 9 via a gear 8.
- the crankshaft 9 generates a reciprocating motion via a connecting rod 10 a hollow drive piston 11.
- a percussion piston 12 axially movable added.
- a cavity 13 is provided in which in a known manner at the relative movement between the drive piston 11 and percussion piston 12 a Air spring forms, which drives the percussion piston 12 against an anvil 14 and sucked back after a blow, so that at the next forward movement the drive piston 11 a new blow through the Impact piston 12 can be done.
- the striker 14 acts on one in one Tool holder 15 received shank of a tool, not shown.
- a front cavity 16 is provided, over a provided in a wall 17 of the drive piston 11 air duct 18 with the environment of the air spring impact, so z. B. the rest Inside the hammer housing 1, in impact mode in communicating connection stands. This avoids that in front of the percussion piston 12th in the front cavity 16 an air cushion builds up the impact effect could hinder the impact piston 12.
- the drive piston 11, in particular its wall 17, is of a control sleeve 19 surrounded.
- the control sleeve 19 is in a part of the hammer housing 1 forming percussion housing 20 axially movable.
- a collar 21 is provided on the control sleeve 19, which of a driver 22 is included.
- the driver 22 is directly with an extension 2a of the handle second connected, so that at least in the axial direction of the control sleeve 19th effective form-fitting coupling between the handle 2 and the control sleeve 19 is realized.
- the control sleeve 19 has a wall penetrating radial opening 23 on.
- the location of the radial opening 23 is chosen to be in any operating condition with at least one opening 24 in the wall 17 of the drive piston 11 corresponds, wherein - as Fig. 1B shows well - In the axial direction of the drive piston 11 a plurality of openings 24 in the Wall 17 are formed.
- a plurality of openings 24 in the Wall 17 are formed.
- the control sleeve 19 is at least one, sometimes two Openings 24 at the level of the radial opening 23.
- control sleeve 19 On the inside of the control sleeve 19 surrounding cylindrical percussion housing 20 is a recess 25 z. B. in the form of a control sleeve 19 enclosing annular channel formed on its underside to the interior of the hammer housing 1, so the environment of the air spring impact opens.
- the openings 24 in the drive piston 11, the radial opening 23 in the control sleeve 19 and the recess 25 together form an idle channel, by the idling mode of the air spring striking a communicating Connection of the cavity 13 to the surroundings of the air spring impact mechanism can be produced.
- Figs. 1A and 1B show the hammer and in particular the air spring impact mechanism in impact mode. Accordingly, no communicating Connection exist between the cavity 13 and the environment. Therefore the control sleeve 19 is shifted in the percussion mechanism housing 20 such that the radial opening 23 is not above the recess 25. Thus, the Connection interrupted.
- the control sleeve 19, together with the of her recorded radial opening 23 a valve for opening and closing of the idle channel.
- the corresponding position of the control sleeve 19 is effected by that the operator the handle 2 against the hammer housing 1 and the effect the spring systems 3 pushes forward. Accordingly, he also pushes that Tool against the rock to be processed.
- the pressure force proportional Relative displacement of the handle 2 relative to the hammer housing 1 is transmitted directly to the control sleeve 19, so that the desired, in Figs. 1A and 1B shown axial position of the control sleeve 19 occurs.
- Fig. 2 shows an enlarged detail of the hammer of Fig. 1A, however in idle mode, with the tool on the rock to be machined seated, without any pressure by the operator.
- FIGS. 3A and 3B show the hammer according to the invention in FIG Idle operation when the tool is completely lifted from the rock.
- the striker 14 is accordingly in its forward position, because the tool slides out of the hammer housing 1.
- Figures 4, 5A and 5B show the hammer of the invention in a second Embodiment. While the first embodiment described above purely mechanical way of detecting the pressing force of the operator on the handle and a consequent influence of the Position of the connection of the cavity 13 with the environment controlling Valve enabled, the second embodiment is based on a mechatronic Solution. As far as the same components as in the first embodiment are also used, the same reference numerals listed. On a new description of the corresponding elements is waived.
- valve body 30 in the second Embodiment used very short idle channel.
- the idle channel consists here only of a recess 31 in the percussion mechanism housing 20th and a connecting passage 32 into which the valve body 30 is inserted.
- the valve body 30 has a through hole 33 in its interior on. As can be seen in FIGS. 4 and 5A and 5B, the valve body 30 is rotatable. For this purpose, an actuator, not shown in the figures, is provided.
- valve body 30 While in Fig. 4, the valve body 30 is rotated to a position in which the Through hole 33 is not arranged in the idle channel, so that the Connection between the cavity 13 and the surroundings of the air spring impact mechanism is interrupted, in Figs. 5A and 5B is a position of Valve body 30 can be seen, in which the through hole 33, the idle channel opens and the connection between the cavity 13 to the environment manufactures.
- the handle 2 is relative to the Hammer housing 1 movably mounted against the action of spring systems 3.
- the relative position between the handle 2 and hammer housing 1 is detected by means of a proximity sensor 34.
- the proximity sensor 34 may either be construed as having only binary states, viz Impact operation idling operation, capable of distinguishing. Alternatively it is also possible with the help of a suitable proximity sensor, the exact Position of the handle 2 relative to the hammer housing 1 to detect and evaluate accordingly.
- the proximity sensor 34 can also - z. B. inside the spring systems 3, but also independent of spring systems - Be arranged a suitable force measuring sensor, that of the operator applied pressing force detected. Furthermore, it is possible by a touch-sensitive Force measuring sensor in the handle 2 itself directly at the Handle 2b to detect the pressing force of the operator.
- the proximity sensor 34 generates a pressing signal corresponding to the pressing force - be it binary or proportional to the pressure force - and conduct it to a controller 35 on.
- the controller 35 recognizes that the operator presses the hammer so that a transition from the idle position is desired in the impact position, the controller 35 controls the valve actuator, not shown, to the valve body 30 in the in To rotate Fig. 4 shown position.
- a position sensor is provided which determines the position of the hammer in Space, in particular the inclination of the tool axis, detected and a corresponding Position signal to the controller 35 outputs.
- the controller 35 evaluates the position signal to the effect that by the position and thus by the working direction caused weight forces of the tool and hammer working upwards by the operator at the handle 2 in addition, or when working down to the tool act and support the blow, in the evaluation of the Andrücksignals can be considered. This can otherwise due to the gravitational effect very different pressure forces ever be uniformed according to the direction of use.
- Both the mechanical solution according to the first embodiment as also the mechatronic solution of the further described embodiments allow a particularly gentle start of the hammer.
- the operator The tip of the tool can be careful at the desired location put on and by increasing the pressing force a shift of the Handle 2 and thus cause a gentle onset of impact operation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Boring (AREA)
Abstract
Description
- Fig. 1A
- eine Schnittdarstellung eines erfindungsgemäßen Bohr- und oder Schlaghammers (Hammer) gemäß einer ersten Ausführungsform im Schlagbetrieb;
- Fig. 1B
- eine Ausschnittsvergroßerung von Fig. 1A;
- Fig. 2
- eine Ausschnittsvergrößerung der ersten Ausführungsform gemäß Fig. 1A, jedoch im Leerlaufbetrieb bei auf am Gestein aufsitzendem Werkzeug;
- Fig. 3A
- eine Schnittdarstellung des Hammers gemäß der ersten Ausführungsform im Leerlaufbetrieb bei vom Gestein abgehobenem Werkzeug;
- Fig. 3B
- eine Ausschnittsvergrößerung von Fig. 3A;
- Fig. 4
- eine Schnittdarstellung eines erfindungsgemäßen Hammers nach einer zweiten Ausführungsform im Schlagbetrieb;
- Fig. 5A
- den Hammer von Fig. 4 im Leerlaufbetrieb;
- Fig. 5B
- eine Ausschnittsvergrößerung von Fig. 5A.
Claims (13)
- Bohr- und/oder Schlaghammer, mitwenigstens einem Handgriff (2) mit einer Griffstelle (2b) zum Halten und Andrücken des Bohr- und/oder Schlaghammers durch einen Bediener;einem Luftfederschlagwerk mit einem hin- und herbewegbaren Antriebskolben (11) und einem von dem Antriebskolben (11) antreibbaren Schlagkolben (12), wobei zwischen dem Antriebskolben (11) und dem Schlagkolben (12) ein Hohlraum (13) zur Aufnahme einer Luftfeder ausgebildet ist;einem Leerlaufkanal (23, 24, 25) zur Verbindung des Hohlraums (13) mit der Umgebung des Luftfederschlagwerks und Belüftung des Hohlraums (13) in einem Leerlaufbetrieb;einem in dem Leerlaufkanal (23, 24, 25) angeordneten Ventil (19, 23) zum Öffnen und Schließen des Leerlaufkanals; und miteinem wenigstens das Luftfederschlagwerk umgebenden Hammergehäuse (1);
dadurch gekennzeichnet, dassin dem Kraftfluss zwischen der Griffstelle (2b) und dem Hammergehäuse (1) eine Erfassungseinrichtung (2a, 3; 3, 34) zum Erfassen einer von dem Bediener an dem Handgriff (2) aufbringbaren Andrückkraft angeordnet ist; und dassdas Ventil (19, 23) in Abhängigkeit von der erfassten Andrückkraft ansteuerbar ist. - Bohr- und/oder Schlaghammer nach Anspruch 1, dadurch gekennzeichnet, dass der Handgriff (2) relativ zu dem Hammergehäuse (1) beweglich ist.
- Bohr- und/oder Schlaghammer nach Anspruch 2, dadurch gekennzeichnet, dass zwischen dem Handgriff (2) und dem Hammergehäuse (1) ein zu der Erfassungseinrichtung gehörendes Federsystem (3) vorgesehen ist, um den Handgriff (2) relativ zu dem Hammergehäuse (1) mit einer vorgegebenen Federkraft zu halten.
- Bohr- und/oder Schlaghammer nach Anspruch 3, dadurch gekennzeichnet, dass die Erfassungseinrichtung einen mit dem Handgriff (2) gekoppelten Fortsatz (2a) aufweist, der derart mit dem Handgriff (2) gegen die Wirkung des Federsystems (3) relativ zu dem Hammergehäuse (1) verlagerbar ist, dass seine Verlagerung der Andrückkraft des Bedieners im wesentlichen proportional ist.
- Bohr- und/oder Schlaghammer nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das Federsystem (3) auch Bestandteil einer Einrichtung zur Schwingungsdämpfung des Handgriffs (2) ist.
- Bohr- und/oder Schlaghammer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine ein Steuerelement des Ventils bildende, axial bewegliche Hülse (19) vorgesehen ist, deren Axialposition in Abhängigkeit von der Andrückkraft veränderbar ist.
- Bohr- und/oder Schlaghammer nach Anspruch 6, dadurch gekennzeichnet, dass die Hülse (19) mit dem Handgriff (2) in Axialrichtung formschlüssig verbunden ist.
- Bohr- und/oder Schlaghammer nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dassder Antriebskolben (11) hohl ausgebildet ist;der Schlagkolben (12) im Antriebskolben (11) axial beweglich ist; und dassin einer zylindrischen Wandung (17) des Antriebskolbens (11) mehrere Öffnungen (24) vorgesehen sind, die bezüglich einer Axialrichtung des Antriebskolbens (11) nebeneinander angeordnet sind und je nach Axialstellung des Antriebskolbens (11) jeweils einen Teil des Leerlaufkanals bilden. - Bohr- und/oder Schlaghammer nach Anspruch 8, dadurch gekennzeichnet, dassder Antriebskolben (11) von der Hülse (19) radial umgeben ist;in der Hülse (19) eine einen Teil des Leerlaufkanals bildende Radialöffnung (23) vorgesehen ist, die in jedem Betriebszustand des Luftfederschlagwerks über wenigstens einer der Öffnungen (24) in der Wandung (17) des Antriebskolbens (11) steht;die Hülse (19) in einem Schlagwerksgehäuse (20) geführt ist;in dem Schlagwerksgehäuse (20) eine ebenfalls einen Teil des Leerlaufkanals bildende und mit der Umgebung kommunizierende Ausnehmung (25) vorgesehen ist; und dassfür den Leerlaufbetrieb des Luftfederschlagwerks die Radialöffnung (23) in Abhängigkeit von der Andrückkraft über die Ausnehmung (25) in dem Schlagwerksgehäuse (20) bewegbar ist, derart, dass der Hohlraum (13) im Antriebskolben (11) über die Öffnungen (24) in der Seitenwand (17) des Antriebskolbens (11), die Radialöffnung (23) in der Hülse (19) und die Ausnehmung (25) im Schlagwerksgehäuse (20) mit der Umgebung in kommunizierender Verbindung steht.
- Bohr- und/oder Schlaghammer nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dassdie Erfassungseinrichtung einen Sensor (34) aufweist, zum Erfassen eines Zustands, in dem der Handgriff (2) gegen die Wirkung des Federsystems (3) gegen das Hammergehäuse (1) angedrückt ist, und zum Erzeugen eines Andrücksignals;das Ventil ein mechanisch, elektrisch, elektromechanisch oder elektromagnetisch ansteuerbares Ventilelement (30) aufweist; und dassdas Andrücksignal einer Steuerung (35) zuführbar ist, die entsprechend das Ventilelement (30) zum Öffnen und Schließen des Ventils ansteuert. - Bohr- und/oder Schlaghammer nach Anspruch 10, dadurch gekennzeichnet, dass der Sensor ein Näherungssensor (34) oder ein Kraftmesssensor ist.
- Bohr- und/oder Schlaghammer nach Anspruch 10 oder 11, dadurch gekennzeichnet, dassein Lagesensor vorgesehen ist, zum Erfassen der Lage des Bohr-und/oder Schlaghammers im Raum relativ zu einer Horizontalebene und zum Erzeugen eines entsprechenden Lagesignals;das Lagesignal der Steuerung (35) zuführbar ist; und dassdie Steuerung (35) unter Auswertung des Andrücksignals und des Lagesignals das Ventilelement (30) ansteuert.
- Bohr- und/oder Schlaghammer nach Anspruch 11, dadurch gekennzeichnet, dass bei der Auswertung des Andrücksignals und des Lagesignals eine Abweichung der Lage des Bohr- und/oder Schlaghammers von der Horizontalebene derart berücksichtigbar ist, dass das sich daraus ergebende Andrücksignal einer Korrektur unter Berücksichtigung der wirksamen Gewichtskräfte des Handgriffs (2), des Hammergehäuses (1) und der in ihm enthaltenen Komponenten sowie eines Werkzeugs unterziehbar ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10145464 | 2001-09-14 | ||
DE10145464A DE10145464C2 (de) | 2001-09-14 | 2001-09-14 | Bohr- und/oder Schlaghammer mit anpressdruckabhängiger Leerlaufsteuerung |
PCT/EP2002/010253 WO2003024672A1 (de) | 2001-09-14 | 2002-09-12 | Bohr- und/oder schlaghammer mit anpressdruckabhängiger leerlaufsteuerung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1425138A1 EP1425138A1 (de) | 2004-06-09 |
EP1425138B1 true EP1425138B1 (de) | 2005-07-20 |
Family
ID=7699118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02777083A Expired - Lifetime EP1425138B1 (de) | 2001-09-14 | 2002-09-12 | Bohr- und/oder schlaghammer mit anpressdruckabhängiger leerlaufsteuerung |
Country Status (6)
Country | Link |
---|---|
US (1) | US6913088B2 (de) |
EP (1) | EP1425138B1 (de) |
JP (1) | JP4243539B2 (de) |
DE (2) | DE10145464C2 (de) |
ES (1) | ES2243767T3 (de) |
WO (1) | WO2003024672A1 (de) |
Families Citing this family (61)
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DE102020206450A1 (de) * | 2020-05-25 | 2021-11-25 | Robert Bosch Gesellschaft mit beschränkter Haftung | Handwerkzeugmaschine |
US11926030B2 (en) * | 2020-08-24 | 2024-03-12 | Makita Corporation | Power tool having hammer mechanism |
DE102020212425A1 (de) * | 2020-10-01 | 2022-04-07 | Robert Bosch Gesellschaft mit beschränkter Haftung | Lagerflansch für ein Antriebssystem einer Handwerkzeugmaschine, sowie Bohrhammer mit einem Schlagwerk und einem Lagerflansch |
JP2022119301A (ja) * | 2021-02-04 | 2022-08-17 | 株式会社マキタ | 打撃工具 |
JP2022127768A (ja) * | 2021-02-22 | 2022-09-01 | 株式会社マキタ | 打撃工具 |
JP2022128006A (ja) * | 2021-02-22 | 2022-09-01 | 株式会社マキタ | 打撃工具 |
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US6691798B1 (en) * | 2002-06-19 | 2004-02-17 | Steven James Lindsay | Variable hand pressure activated power tool |
-
2001
- 2001-09-14 DE DE10145464A patent/DE10145464C2/de not_active Expired - Fee Related
-
2002
- 2002-09-12 ES ES02777083T patent/ES2243767T3/es not_active Expired - Lifetime
- 2002-09-12 JP JP2003528359A patent/JP4243539B2/ja not_active Expired - Fee Related
- 2002-09-12 US US10/485,673 patent/US6913088B2/en not_active Expired - Fee Related
- 2002-09-12 WO PCT/EP2002/010253 patent/WO2003024672A1/de active IP Right Grant
- 2002-09-12 EP EP02777083A patent/EP1425138B1/de not_active Expired - Lifetime
- 2002-09-12 DE DE50203692T patent/DE50203692D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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DE10145464A1 (de) | 2003-04-10 |
US20040177981A1 (en) | 2004-09-16 |
WO2003024672A1 (de) | 2003-03-27 |
EP1425138A1 (de) | 2004-06-09 |
ES2243767T3 (es) | 2005-12-01 |
JP4243539B2 (ja) | 2009-03-25 |
DE10145464C2 (de) | 2003-08-28 |
US6913088B2 (en) | 2005-07-05 |
JP2005502488A (ja) | 2005-01-27 |
DE50203692D1 (de) | 2005-08-25 |
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