CN101190522A - Pneumatic immpacting device for hand-held machine tool - Google Patents
Pneumatic immpacting device for hand-held machine tool Download PDFInfo
- Publication number
- CN101190522A CN101190522A CNA2007101940724A CN200710194072A CN101190522A CN 101190522 A CN101190522 A CN 101190522A CN A2007101940724 A CNA2007101940724 A CN A2007101940724A CN 200710194072 A CN200710194072 A CN 200710194072A CN 101190522 A CN101190522 A CN 101190522A
- Authority
- CN
- China
- Prior art keywords
- hammer
- closing element
- percussion mechanism
- impulse pin
- aforesaid right
- 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.)
- Pending
Links
- 238000009527 percussion Methods 0.000 claims description 24
- 230000033001 locomotion Effects 0.000 claims description 13
- 230000008685 targeting Effects 0.000 claims description 12
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 238000013016 damping Methods 0.000 description 9
- 230000035939 shock Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000284 resting 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
- B25D11/06—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
-
- 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
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The pneumatic impact tool (1) has a hammer tube (2), in which a piston (5) is guided to slide longitudinally and cooperates with a beater over an air cushion, which works together with an impact pin. A hammer tube penetrates vent opening, which is located in the area of the air cushion and cooperates with a closing element for opening or closing. The closing element (28) is directly connected with the impact pin (11) only as common sliding unit (32).
Description
Technical field
The present invention relates to the Pneumatic immpacting device of hand held power machine, comprise that a hammer pipe passes the ventilating opening of this hammer pipe with at least one, one piston is directed to longitudinal movement in this hammer pipe and can be via an air cushion and a hammer acting in conjunction, this the hammer with an impulse pin collaborative work, this ventilating opening be positioned at air cushion the zone and in order to open or to seal and a closing element acting in conjunction.
Background technology
The Pneumatic immpacting device of the above-mentioned type is known.This percussion mechanism impact type ground periodically repeatedly drives an instrument, for example constitutes the cutter of the hand held power machine of hammer drill.In order to produce corresponding shock pulse, one is moved back and forth in the hammer pipe by motor-driven piston and drives same this hammer that is directed at this via an air cushion between a piston and a hammer in this hammer pipe.In the time of on striking impulse pin (tup), the impact mass of the motion of hammer transmits a pulse, and itself is delivered to this impulse pin this pulse on the instrument.Impulse pin also has such task except pulse is transmitted, promptly make percussion mechanism and described hammer is moved on the operating position by a dry running position when instrument is pressed on the workpiece.For this reason, the operator presses against the instrument of hand held power machine on the workpiece.By compressing, this instrument makes impulse pin and hammers into shape towards the direction of piston and moves on the operating position of percussion mechanism.Hammer Guan Zaiqi has the ventilating opening that at least one passes this hammer pipe on the height of the air cushion between piston and the hammer.This ventilating opening seals by closing element on the operating position of percussion mechanism.In order to control closing element, this closing element is connected with the B impact damper system device of hammer pipe.B impact damper system device is the part towards end stop described hammer, that be used to limit the impulse pin stroke of the impulse pin targeting part of hammer pipe.For closing element is moved, at least a portion of B impact damper system device must be supported with longitudinal movement with respect to the remainder of hammer pipe, therefore obtains hammering into shape the structure space demand of the raising of pipe.
Summary of the invention
In order to reduce the structure space demand, the present invention proposes, and closing element directly is connected to the unit that only can move with impulse pin.By the unit that closing element and impulse pin is configured to can move together, need not to hammer into shape the moveable element that is used to control closing element of pipe, these parts have improved the structure space demand and have especially hammered the whole length of pipe into shape.Closing element pass through that closing element realizes open or the motion of enclosed ventilation mouth is directly controlled by the motion of impulse pin.Impulse pin is not to be delivered on the closing element in the recoil (B impact) on the end of hammer of impulse pin stroke, but is delivered on the recoil vibration absorber of hammer pipe, and it does not have the connection of leading to closing element.Can avoid vibration to a great extent by this structure.
Propose in addition, closing element is arranged on the excircle of hammer pipe.For example be supported with longitudinal movement with respect to the hammer pipe at this closing element, and seal or open ventilating opening, its mode is that it moves to the ventilating opening front or discharges this ventilating opening by back moving.
Especially propose, in order to be connected with impulse pin, closing element is engaged on the dead slot of hammering into shape in the pipe in the mode of passing.For this reason, for example the part of the corresponding shaping of closing element is engaged on the described dead slot and with impulse pin in the mode of passing and is connected.At this, be connected especially a force closure and/or the sealed connection of shape between closing element and the impulse pin.
A further scheme according to the present invention proposes, and closing element has an intermediary element in order to be connected with impulse pin.Especially this intermediary element is that the mode to pass of closing element is engaged in part on the described dead slot, corresponding shaping.
Advantageously propose, this intermediary element constitutes as pin.
Propose in addition, percussion mechanism has a reposition element that reacts on the closing movement of closing element.If there is this reposition element, so only closing movement itself must be produced by impulse pin.Closing element returning by reposition element on dry running position (resting position) implemented.At this, reposition element constitutes like this, makes closing element arrive its dry running position fast enough.
Propose in a favourable configuration of the present invention, reposition element constitutes as spring assembly.Spring assembly is particularly suitable as reposition element, because on purpose orientation and spring assembly also have the elasticity that remains unchanged after a large amount of deformation processes in the distortion of masterpiece time spent spring assembly.In addition, have the different version of spendable spring assembly, described spring assembly is in its structure, its size and its working method---for example as extension spring or stage clip---aspect have any different.
Propose by a further scheme of the present invention, closing element is constituted as and encloses the closure sleeve of holding described hammer pipe at least in part.By closing element being configured to surround at least in part the closure sleeve of hammer pipe, this closing element is directed on the outside of hammer pipe with longitudinal movement.
Propose in addition, the hammer pipe has an impulse pin targeting part, and the latter has two end stop opposite each other.Described end stop for example constitutes the bracing or strutting arrangement and the impulse pin stroke of restriction impulse pin in the hammer pipe of annular.First end backstop be positioned at the impulse pin targeting part on the end of described hammer and the second end backstop be positioned at the impulse pin targeting part on the end of instrument or tool seat.
Propose by a further scheme of the present invention, described end stop has one of at least vibration absorber.The vibration absorber of first end backstop is a B impact damper system device, the recoil of this vibration absorber damping impulse pin after impulse pin is delivered to pulse on the instrument.The vibration absorber of the second end backstop is a dry running vibration absorber, and this vibration absorber damping impulse pin is in the locational pulse of its dry running.This B impact damper system device and first end backstop especially constitute a traditional B and impact bracing or strutting arrangement, the latter has damping element, a contact disc and a locating snap ring that constitutes damping ring, and this locating snap ring makes B impact bracing or strutting arrangement to be connected with the tubular portion of hammering pipe into shape.
Description of drawings
Explain the present invention in detail by means of accompanying drawing, shown in the figure:
Fig. 1: the percussion mechanism with closing element and impulse pin of the present invention is shown, and this closing element and impulse pin constitute the unit that only can move jointly.
The specific embodiment
Fig. 1 illustrate hand held power machine by percussion mechanism 1 of the present invention.Percussion mechanism 1 has a hammer pipe 2 that has longitudinal axis 3.Be provided with driven piston 5 on a first end 3, this piston can be supported movably along longitudinal axis 3 in hammer pipe 2.An air cushion 6 is connected on the piston 5 along longitudinal axis 3, and this air cushion constitutes the border in its side opposite with piston 5 by first end face 7 of hammer 8.The first end zone 10 of impulse pin 11 abuts against on second end face 9 opposite with first end face 7 of hammer 8.The first end of impulse pin 11 zone 10 and the second end zone 12 opposite with first end zone 10 constitute the border of the primary section 13 of impulse pins 11, and this primary section has the full diameter greater than the diameter separately of two end regions 10,12 at least in part.First end zone 10 transition in first annular convex shoulder 14 is a primary section 13, and the second end zone 12 transition in second annular convex shoulder 15 is the primary section 13 of impulse pin 14.The part 16 of the impulse pin stroke of the encirclement impulse pin 11 of hammer pipe 2 constitutes impulse pin targeting part 17.Impulse pin targeting part 17 has two reciprocal end stop 18,19 on longitudinal axis 3, wherein first end backstop 18 be arranged on impulse pin targeting part 17 on a hammer side of 8.The second end backstop 19 is positioned on the second end 20 of hammer pipe 2, and this second end is opposite with first end 4.A tool seat unshowned, that be used to receive unshowned instrument is connected the second end 20 of hammer pipe 2.The second end backstop 19 of impulse pin targeting part 17 constitutes by the contraction flow region of hammer pipe 2.The first end backstop 18 of impulse pin targeting part 17 has a vibration absorber 22 that constitutes B impact damper system device 21.Vibration absorber 22 axially is arranged in the locating snap ring 26 of the annular groove 26 of the annular contact disc 25 of its back and a part that constitutes impulse pin targeting part 17 16 that is positioned partially at hammer pipe 2 ' constitute by a damping element that constitutes damping ring 23 and be made of elastomeric material 24, one, and the contact disc 25 of annular is supported on this locating snap ring.The excircle 27 of hammer pipe 2 is provided with one and is used to open or the closing element 28 of enclosed ventilation mouth 29, and this ventilating opening passes hammer pipe 2 in a zone of air cushion 6.Closing element 28 is constructed to one and encloses the closure sleeve 30 of holding hammer pipe 2, thereby this closure sleeve hides and enclosed ventilation mouth 29 in a unshowned in the accompanying drawings operating position of percussion mechanism 1.The closing element 28 that constitutes closure sleeve 30 is engaged in the dead slot 31 of hammering pipe 2 into shape and with impulse pin 11 in the mode of passing and is connected to the unit 32 that only can move.In order to be connected with impulse pin 11, closing element 28 have one constitute pin 34, be engaged in intermediary element 33 on the dead slot 31 in the mode of passing.The intermediary element 33 that constitutes pin 34 is coupled in the flute profile contraction flow region 35 in the primary section 13 of impulse pin 11.By this cooperation, closing element 28 directly is connected with impulse pin 11.The closing element 28 that constitutes closure sleeve 30 have spring assembly 38 that 36, one of one first support components constitute stage clip 37 in one side 39 upper supports on this support component.On the opposite side 40 opposite with a described side 39 of spring assembly 38, this spring assembly is bearing on one second support component 41 of hammer pipe 2.At this, spring assembly 38 is to be used to the locational reposition element 42 of so-called dry running that makes closing element 28 reset to percussion mechanism 1.
The working method of percussion mechanism 1 is as follows: if the operator of hand held power machine 1 presses against an instrument that is inserted in the unshowned tool seat on the workpiece, then impulse pin 11 moves on the unshowned in the accompanying drawings operating position along longitudinal axis 3.The such degree of the elastic force ground that overcomes spring assembly 38 with impulse pin 11 direct-connected closing elements 28 moves to the direction of piston 5, makes it by hiding enclosed ventilation mouth 29.On this operating position of hand held power machine, can form an air cushion 6, drive hammer 8 by this air cushion by drive unit pistons reciprocating 5.Hammer 8 also moves back and forth and transmit shock pulse when running into impulse pin 11, and this impulse pin is delivered to this shock pulse on the instrument by motion (arrow 43).One causes that the recoil to the impulse pin 11 born by B impact damper system device 21, makes this recoil and only be delivered on the hammer pipe 2 vibration damping in first end backstop 18.If hand held power machine is not pressed against on the workpiece with instrument, impulse pin 11 is because the elastic force of spring assembly 38 and/or hammer 8 shock pulse into shape and move towards the direction of the second end 20 of hammer pipe 2 makes second annular convex shoulder 15 of impulse pin 11 abut on the second end backstop 19 of impulse pin targeting part 17 so.On this position of impulse pin 11, percussion mechanism 1 is on the dry running position.On this dry running position of percussion mechanism 1, the closing element 28 that constitutes closure sleeve 30 makes it discharge ventilating opening 29 also along with the direction of impulse pin 11 such degree ground towards the second end 20 moves.But,, between piston 5 and hammer 8, can not form air cushion 6 so that hammer 8 reciprocating motions into shape with the air pressure that is fit to size because ventilating opening 29 is opened.Therefore, on the dry running position of percussion mechanism 1, this percussion mechanism 1 does not impact activity.
The position of closing element that constitutes closure sleeve 30 is directly by the Position Control of impulse pin 11.The recoil of impulse pin 11 makes B impact and is not delivered to closing element 28 via B impact damper system device 21 vibration dampings.Traditional structure by damping ring 23, contact disc 25 and locating snap ring 26 ' constitute can be used as B impact damper system device 21.It is that cost is favourable and saved member length that this B impacts bracing or strutting arrangement.The movable quality of B impact damper system device is Weight-optimised and vibration source is provided hardly.The assembling of B impact damper system device 21 of the present invention and dismounting are proved to be simple.
Claims (10)
1. the Pneumatic immpacting device of hand held power machine, comprise that a hammer pipe passes the ventilating opening of this hammer pipe with at least one, one piston is directed to longitudinal movement in this hammer pipe and can be via an air cushion and a hammer acting in conjunction, this hammer and an impulse pin collaborative work, this ventilating opening be positioned at this air cushion the zone and in order to open or to seal with a closing element acting in conjunction, it is characterized in that: this closing element (28) directly is connected to the unit (32) that only can move with impulse pin (11).
2. by the described percussion mechanism of claim 1, it is characterized in that: this closing element is arranged on the excircle (27) of hammer pipe (2).
3. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: this closing element (28) is connected with impulse pin (11) by the cooperation of passing the dead slot (31) in the hammer pipe (2).
4. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: this closing element (28) has an intermediary element (33), is used for being connected with impulse pin (11).
5. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: this intermediary element (33) is constructed to pin (34).
6. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: be provided with a reposition element (42) that reacts on the closing movement of closing element (28).
7. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: this reposition element (42) is constructed to spring assembly (38).
8. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: this closing element (28) is constructed to enclose at least in part the closure sleeve (30) of holding hammer pipe (2).
9. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: this hammer pipe (2) has an impulse pin targeting part (17), and the latter has two end stop respect to one another (18,19).
10. by each described percussion mechanism of aforesaid right requirement, it is characterized in that: at least one of described end stop (18,19) has a vibration absorber (22).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200610056848 DE102006056848A1 (en) | 2006-12-01 | 2006-12-01 | Pneumatic impact tool for hand operated machine tool, has hammer tube and closing element directly connected with impact pin only as common sliding unit |
| DE102006056848.6 | 2006-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101190522A true CN101190522A (en) | 2008-06-04 |
Family
ID=39338905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101940724A Pending CN101190522A (en) | 2006-12-01 | 2007-11-30 | Pneumatic immpacting device for hand-held machine tool |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101190522A (en) |
| DE (1) | DE102006056848A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161190A (en) * | 2010-02-09 | 2011-08-24 | 罗伯特·博世有限公司 | Hand-held tool machine device |
| CN103481246A (en) * | 2012-06-13 | 2014-01-01 | 罗伯特·博世有限公司 | Impact mechanism |
| CN104249337A (en) * | 2013-06-28 | 2014-12-31 | 罗伯特·博世有限公司 | Impact mechanism device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011079367A1 (en) * | 2011-07-05 | 2013-01-10 | Robert Bosch Gmbh | Stemming beater device for hand tool machine, particularly drill- or chipping hammer, has beater and striker, where damping element is provided to damp B-strike |
| DE102011081711A1 (en) | 2011-08-29 | 2013-02-28 | Metabowerke Gmbh | Air cushion impact mechanism for a motor driven drill or percussion hammer |
-
2006
- 2006-12-01 DE DE200610056848 patent/DE102006056848A1/en not_active Withdrawn
-
2007
- 2007-11-30 CN CNA2007101940724A patent/CN101190522A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161190A (en) * | 2010-02-09 | 2011-08-24 | 罗伯特·博世有限公司 | Hand-held tool machine device |
| CN103481246A (en) * | 2012-06-13 | 2014-01-01 | 罗伯特·博世有限公司 | Impact mechanism |
| CN104249337A (en) * | 2013-06-28 | 2014-12-31 | 罗伯特·博世有限公司 | Impact mechanism device |
| CN104249337B (en) * | 2013-06-28 | 2018-08-17 | 罗伯特·博世有限公司 | Beater mechanism device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006056848A1 (en) | 2008-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080604 |