CN104249334B - Hand machine tool striking mechanism - Google Patents
Hand machine tool striking mechanism Download PDFInfo
- Publication number
- CN104249334B CN104249334B CN201410293699.5A CN201410293699A CN104249334B CN 104249334 B CN104249334 B CN 104249334B CN 201410293699 A CN201410293699 A CN 201410293699A CN 104249334 B CN104249334 B CN 104249334B
- Authority
- CN
- China
- Prior art keywords
- relieving ring
- machine tool
- striking mechanism
- hand machine
- tool striking
- 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.)
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- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000013016 damping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0011—Details of anvils, guide-sleeves or pistons
- B25D2217/0019—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
- B25D2250/065—Details regarding assembling of the tool
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The present invention is by a kind of hand machine tool striking mechanism, it has at least one hammer pipe (10), at least one hammer pipe has at least one groove (12), the hand machine tool striking mechanism also has at least one relieving ring (14) being arranged in the groove (12), and at least one relieving ring is provided for constructing an axial stop of the hammer pipe (10).It is proposed：The relieving ring (14) fully encases the hammer pipe (10).
Description
Technical field
The present invention relates to a kind of hand machine tool striking mechanism and a kind of hand with hand machine tool striking mechanism
Hold formula toolroom machine.
Background technology
A kind of hand machine tool striking mechanism is proposed, it has at least one hammer pipe, at least one hammer pipe
With at least one groove, the hand machine tool striking mechanism also has at least one relieving ring being arranged in the groove,
At least one relieving ring is provided for constructing an axial stop of the hammer pipe.
The content of the invention
For the present invention by a kind of hand machine tool striking mechanism, it has at least one hammer pipe, described at least one
Hammer pipe has at least one groove, and the hand machine tool striking mechanism also has at least one insurance being arranged in the groove
Ring, at least one relieving ring are provided for constructing an axial stop of the hammer pipe.
It is proposed as follows：The relieving ring fully encases the hammer pipe." hand machine tool striking mechanism " especially should herein
When the beater mechanism for being understood to a hand-held tool, wherein, the hand-held tool is especially configured to a workpieces processing herein
Machine, advantageously but be constructed to bore hammer and/or jump bit." hammer pipe " is especially appreciated that such pipe, and it is set
It is supported for enabling the impulse member of a beater mechanism to move along a main operative orientation.Preferably, the hammer pipe it is interior
Control air pressure can be established under at least one running status, the control air pressure accelerates under at least one running status
The impulse member." main operative orientation " is especially construed as such direction, and in the direction, operator is in a working motion
The hand machine tool striking mechanism is moved in a manner of setting.Preferably, the main operative orientation is parallel to the impact
The impact direction orientation of part." groove " is especially appreciated that a kind of otch herein, and the otch inserts the week of the hammer pipe from outside
In side and the otch circumferentially direction extend.Here, the groove be preferably it is circular and disposable complete in circumferential direction
The hammer pipe is surrounded entirely." relieving ring " is appreciated that a kind of machine element herein, and the machine element is provided for element and existed
On one axle, the insurance of position vertically on especially described hammer pipe, wherein, the relieving ring is in order to which it is positioned and is arranged in a groove
In." axial stop of hammer pipe " is especially appreciated that such stopper section herein, and the stopper section is arrived along an axial direction
Hammered into shape described in one maximum position Shangdi gauge within Guan Yi housings, especially within a beater mechanism housing axially movable.
" fully encasing " is especially appreciated that herein：The relieving ring is vertically in the medial axis of the hammer pipe one
In plane, at least about the whole periphery of the hammer pipe, i.e., surround the hammer at least about 360 degree and manage.It is possible thereby in the hammer pipe
A particularly advantageous collar is constructed on periphery, the collar forms the built-in function element of an axial plain bearing.Pass through the root
Particularly advantageous axially supported simultaneously according to what the design of the present invention can be realized on the hammer Guan Yi beater mechanism housings
And particularly advantageously component it can lack and inexpensively construct the hand machine tool striking mechanism.
In addition propose：More than 360 degree ground of the relieving ring wrap the hammer pipe." more than 360 degree ground wrappings " herein especially
It is appreciated that, the relieving ring is at least 361 degree, preferably more than 400 degree around the wrapping of the hammer pipe and especially had one
It is more than 700 degree in the design of profit.Thus, it is possible to realize particularly advantageous wrapping of the hammer pipe by the relieving ring, by
This described relieving ring generates the particularly advantageously high confining force in the groove.
In addition propose：The relieving ring is configured to fuse cutout ring." fuse cutout ring " is especially appreciated that herein
Such relieving ring, the relieving ring more than 360 degree surround an element and form it is multiple spiral, these spiral in axial direction
Against each other.Here, the fuse cutout ring is preferably formed by the round steel for rolling and winding, thus the relieving ring is advantageously
Seamed edge and flash without stretching, but there is seamed edge radius.It is possible thereby to particularly advantageously construct the relieving ring.
In addition propose：The relieving ring has at least two to spiral." spiraling " should be especially appreciated that as a geometric form herein
The circle path of shape spiral." at least two spiral " especially should be understood to：The relieving ring, which has, at least one completely to spiral
At least one it is other have started to spiral, its preferably at least 50% ground is completed.It is possible thereby to particularly advantageously construct the structure
Make as the relieving ring of fuse cutout ring.
In addition propose：The relieving ring constructs at least one stop surface and/or thrust surface." stop surface and/or thrust
Face " is especially appreciated that such face herein, and the face is provided for constructing an axial stop and with particularly advantageous
Sliding properties, it is possible thereby to carry out having the relieving ring of the stop surface and/or thrust surface relatively another with small friction
The torsion of an one element especially backstop disk.It is possible thereby to advantageously cancel the especially additional disk of other components, these disks
The stop surface and/or thrust surface are constituted, the hand-held tool beater mechanism is constructed less thus, it is possible to special component.
In addition propose：The relieving ring is at least partially coating." coating " is especially appreciated that so herein
The layer being applied on the especially described relieving ring of a component, this layer by shape sealed, material is sealed or adhesion type
Connection is connected with the surface of the relieving ring." being at least partially coating " is especially appreciated that herein：The coating
Be arranged on the subregion of the relieving ring and be arranged at herein the relieving ring constitute stop surface and/or
On those faces of thrust surface, wherein, the relieving ring can also advantageously have the coating over its entire surface.Thus may be used
Particularly advantageously to construct the sliding properties of the relieving ring and abrasion therefore especially desirably reduced during operation
Generated with noise.
In addition propose：The relieving ring has one to spiral direction, and the direction of spiraling is in the assembled state along the hammer
The main rotation of pipe and load direction extension." direction of spiraling " especially should be understood that a direction herein, the one of the relieving ring
End is orientated in the direction.It is possible thereby to realized between the relieving ring and another element especially a backstop disk particularly advantageous
Sliding relation.In addition thus can especially advantageously realize：The relieving ring produces following trend during operation, i.e. leads
Move in the groove and particularly advantageously clamp in the cell therefrom.
In addition propose：Groove where the relieving ring has such radius, and they are more than 0.5 millimeter." radius of groove "
The radius being especially appreciated that herein between lateral wall portion and bottom land.It is possible thereby to the groove is advantageously constructed, especially
In terms of notch effect, managed thus, it is possible to particularly advantageously construct the hammer.
In addition propose：The relieving ring is connected by means of press-fit with the groove.It is possible thereby to make the relieving ring special
Advantageously and securely it is connected with the hammer pipe.
In the case, above-mentioned application and implementation should be not limited to according to the hand machine tool striking mechanism of the present invention
Mode.Especially for functional mode described herein is met, can be had according to the hand machine tool striking mechanism of the present invention
There are discrete component, component and the unit of the other quantity for being different from quantity described here.
Brief description of the drawings
Accompanying drawing
Further advantage provides from following accompanying drawing description.A kind of embodiment of the present invention is illustrated in the accompanying drawings.Accompanying drawing,
Specification and claims contain substantial amounts of combinations of features.Those skilled in the art can also be reasonably by these feature lists
Solely consider and suitably sum up other combinations.
Wherein：
Fig. 1 shows a hand held power machine, and it has the hand-held work according to the present invention only shown in schematic simplified
Tool machine beater mechanism；
Fig. 2 shows a section view of the hand machine tool striking mechanism according to the present invention；And
Fig. 3 shows the schematic diagram of the relieving ring of the hand machine tool striking mechanism according to the present invention.
Embodiment
Fig. 1 shows a hand held power machine 28, and it is shown in phantom according to hand-held of the invention in Fig. 1 with one
Machine tool striking mechanism.
Fig. 2 shows the section view of the part through the hand machine tool striking mechanism according to the present invention.It is described
The part shown in figure 2 of hand machine tool striking mechanism be the hand machine tool striking mechanism it is one anterior,
Face the region of the instrument acceptance division 38 of the hand held power machine 28.The hand machine tool striking mechanism includes an impact
Mechanism shell 40, it is at least partly enclosing the hand machine tool striking mechanism.In order to produce driving moment and in order to by means of
Help the hand machine tool striking mechanism and produce shock pulse, what the hand held power machine 28 was not shown specifically with one
Driver element.By a driven unit, the driving moment of driver element is passed to described hold in order to produce shock pulse
On formula machine tool striking mechanism.The hand machine tool striking mechanism includes a hammer pipe 10.The hammer hollow posts bodily form of pipe 10
Construction.In order to produce a pressure pulse within the hammer pipe 10, the hand machine tool striking mechanism is not detailed with one
The piston shown.The piston arrangement and guiding within the hammer pipe 10.Pass through edge of the piston in the hammer pipe 10
It is axially moved, for the piston within the hammer pipe 10, the gas being in by compression in the hammer pipe 10 produces a pressure arteries and veins
Punching.In order to receive and continue to guide the pressure pulse, the hand machine tool striking mechanism has an impact pin 42.Institute
Impact pin 42 is stated to be arranged in the front area of the hand machine tool striking mechanism within the hammer pipe 10.Institute
Stating hand machine tool striking mechanism has a tool retainer 44, and the tool retainer constitutes the hand held power machine 28
Instrument acceptance division 38.The tool retainer 44 is equally arranged within the hammer pipe 10.Here, tool retainer 44 is arranged
Between the hammer pipe 10 and the impact pin 42.In order to which energy of the hammer pipe 10 within the beater mechanism housing 40 turns
Dynamic supporting, the hand machine tool striking mechanism have a sliding bearing 46 in the front area.Pass through the cunning
Dynamic bearing 46, the hammer pipe 10 can reverse and in the beater mechanism housing 40 relative to the beater mechanism housing 40
Rotation.The hand machine tool striking mechanism includes the relieving ring 48 one outside, and the relieving ring outside is arranged in the cunning
Facing for dynamic bearing 46 the one of the instrument acceptance division 38 is connected on side and with the beater mechanism housing 40 vertically.It is logical
The relieving ring 48 is crossed, the sliding bearing 46 is in axial direction supported on the beater mechanism housing 40.The hammer pipe 10
In axial direction it is supported on by the sliding bearing on the beater mechanism housing 40.Here, the hand held power machine punching
Hitting mechanism has a damping unit 50, and the damping unit is arranged between the sliding bearing 46 and hammer pipe 10.
In order to which the hammer pipe 10 is supported on into the beater mechanism by the damping unit 50 and the sliding bearing 46
On housing 40, the hammer pipe 10 constructs an axial stop 52.In order to construct the axial stop 52, the hand-held work
Tool machine beater mechanism has a relieving ring 14.The relieving ring 14 couples with the hammer pipe 10 securely herein.In order to by described in
Relieving ring 14 is connected on the hammer pipe 10, and the hammer pipe 10 has a groove 12.The groove 12 inserts institute with being circumferentially directed around
In the periphery for stating hammer pipe 10.In order to which the relieving ring 14 is connected on the hammer pipe 10, the relieving ring 14 is arranged in hammer pipe
In 10 groove 12.The hand machine tool striking mechanism has two backstop disks 54,56, wherein, the cloth of backstop disk 54 above
The backstop disk 56 put on the side for facing the instrument acceptance division 38 of the relieving ring 14 and below is arranged in the guarantor
Dangerous ring 14 on the side of the instrument acceptance division 38.Backstop disk 54 before described is to face the instrument acceptance division 38
Sliding surface 58 be supported on the damping unit 50.Backstop disk 54 and the institute before described are ensure that by the sliding surface 58
State few relative motion that rubs between damping unit 50.Backstop disk 56 behind described has the interior diameter of a sedimentation, described
Relieving ring 14 is mounted in the interior diameter in the assembled state.Backstop disk 56 behind described is away from the instrument acceptance division
A sliding surface 60 is constituted on 38 side, the backstop disk 56 passes through the hand held power machine shock machine using the sliding surface
Another relieving ring 62 being connected with the beater mechanism housing 40 of structure is in axial direction supported on the beater mechanism housing 40
On.Described two backstop disks 54,56 are contacted and thus supported each other to face mutual side herein.Pass through described two
Individual backstop disk 54,56 and the relieving ring 14 constitute an axial plain bearing of the hammer pipe 10, and the hammer pipe 10 is along two
The relatively described beater mechanism housing 40 of axial direction is fixed.
The relieving ring 14 (Fig. 3) fully encases the hammer pipe 10, and the relieving ring constitutes the axial stop 52
And described two backstop disks 54,56 are supported on the relieving ring.The relieving ring 14 surrounds the hammer around more than 360 degree herein
Pipe 10.Therefore, the relieving ring 14 is configured to fuse cutout ring.In order to be designed as fuse cutout ring, the relieving ring 14 is by rolling
The round wires material making and wind is formed.The relieving ring 14 is formed by a spring steel herein.It may also be considered that in principle：
The relieving ring 14 shows as significant metal to be formed by another pair those skilled in the art, or another material is formed.
The cross section (see Fig. 1) with a rectangle, its seamed edge are rounded herein for the relieving ring 14.The narrow side of the rectangular cross section exists
This is in axial direction orientated.The wide side of the cross section of the rectangle is orthogonal to following medial axis and is orientated herein, described in composition
The rectangular cross section of relieving ring 14 is wound around the medial axis.The relieving ring 14 has two herein and spirals 16,18.First
Spiral and 16 fully construct herein and form 360 degree.Second spirals 18 not fully constructs and forms only 350 degree herein.
Thus, small gap be present between the first end 64 and the second end 66 of the relieving ring 14.Here, the relieving ring 14
The one end 64 is arranged in an axial sides of the relieving ring 14 and the other end 66 is arranged in the relieving ring 14
Opposite axial sides on.In principle it is also contemplated that：The relieving ring 14 forms two and completely spiraled, or even more
Spiraled in two.
The relieving ring 14 respectively constitutes a stop surface and/or thrust surface 20,22 in two axial sides.It is described to stop
Block face and/or thrust surface 20,22 are formed by axial direction outside, the wide side of the relieving ring 14 respectively.It is described to stop
Block face and/or thrust surface 20,22 abut in respectively in the assembled state corresponding to, face corresponding stop surface and/or only
On the backstop disk 54,56 of pushing surface 20,22.The backstop disk 54,56 is herein in the stop surface and/or thrust surface of the relieving ring 14
20th, slide on 22.Pass through the backstop disk 54,56 stopping on the stop surface and/or thrust surface 20,22 of the relieving ring 14
Gear, these described backstop disks 54,56 fixed respectively along an axial direction and can by it is described slip and rub less and
Thus relatively described relieving ring 14 reverses noise less.In order to improve between the relieving ring 14 and corresponding backstop disk 54,56
Sliding properties, the relieving ring 14 has a coating 24.The coating 24 is taped against on whole relieving ring 14.In principle can also
Consider：Only the stop surface and/or thrust surface 20,22 have a coating 24.
The groove 12 for being arranged therein the relieving ring 14 of the hammer pipe 10 has such radius 26, these radiuses
It is 0.6 millimeter so big.Transition part between bottom land 68 and the cell wall 70 is formed by the radius 26 herein.Here, the groove
12 can the cross section based on the rounding of the relieving ring 14 and be configured with so big radius 26, thus enable in particular to reduce institute
State the notch effect in the negative effect to service life of groove 12.The relieving ring 14 is connected by means of press-fit and the groove 12
Connect.By the press-fit, the relieving ring 14 is rigidly and at utmost Shangdi is arranged in the groove in anti-relative rotation
In 12.The relieving ring 14 is pressed into the groove 12 of the hammer pipe at this with the power of raising, so that the relieving ring 14 is in institute
State and clamped within groove 12.Herein it is contemplated that：The relieving ring 14 in order to assemble and it is cooled be assembled in the groove 12, from
And additional clamping is produced by the thermal expansion of the relieving ring 14.Also contemplate for herein：The relieving ring 14 can be with
Hammered into shape by means of an assembling cone and an assembling sleeve pushing sleeve to described on pipe.
In the assembled state, the relieving ring 14 has one to spiral direction herein, and the direction of spiraling is managed along the hammer
10 main rotation and load direction extension.Here, the end 64,66 of the relieving ring 14 is respectively in corresponding thrust button 54,56
The side for facing the relieving ring 14 on operate.Here, the end 64,66 of the relieving ring 14 respectively towards it is described it is main rotation and
Load direction points to.The main rotation and load direction are formed by following direction herein, and the hammer pipe 10 is during operation
Mainly rotate in the direction.It is described by the end 64,66 of the relieving ring 14 along the main rotation and the orientation of load direction
Relieving ring 14 is advantageously further moved in the groove 12 during operation and is thus advantageously also more firmly placed in institute
State in groove 12.The relieving ring 14 is advantageously influenced the insurance in addition relative to the orientation of the main rotation and load direction
Sliding properties between ring 14 and corresponding thrust button 54,56.
Claims (10)
1. hand machine tool striking mechanism, it has at least one hammer pipe (10), and at least one hammer pipe has at least one
Individual groove (12), the hand machine tool striking mechanism also have at least one relieving ring being arranged in the groove (12)
(14), at least one relieving ring is provided for constructing an axial stop of the hammer pipe (10), it is characterised in that described
Relieving ring (14) fully encases the hammer pipe (10).
2. hand machine tool striking mechanism according to claim 1, it is characterised in that the relieving ring (14) is more than
360 degree of ground wrapping hammer pipes (10).
3. hand machine tool striking mechanism according to claim 1 or 2, it is characterised in that relieving ring (14) structure
Make as fuse cutout ring.
4. hand machine tool striking mechanism according to claim 1 or 2, it is characterised in that relieving ring (14) tool
There are at least two to spiral (16,18).
5. hand machine tool striking mechanism according to claim 1 or 2, it is characterised in that relieving ring (14) structure
Into at least one stop surface and/or thrust surface (20,22).
6. hand machine tool striking mechanism according to claim 1 or 2, it is characterised in that the relieving ring (14) is extremely
Partially there is a coating (24).
7. hand machine tool striking mechanism according to claim 1 or 2, it is characterised in that relieving ring (14) tool
There is one to spiral direction, the direction of spiraling manages the main rotation of (10) along the hammer in the assembled state and load direction prolongs
Stretch.
8. hand machine tool striking mechanism according to claim 1 or 2, it is characterised in that relieving ring (14) institute
Groove (12) there is such radius (26), the radius is more than 0.5 millimeter.
9. hand machine tool striking mechanism according to claim 1 or 2, it is characterised in that the relieving ring (14) is borrowed
Help press-fit to be connected with the groove (12).
10. hand held power machine, it has the hand machine tool striking mechanism according to one of preceding claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013212520.8A DE102013212520A1 (en) | 2013-06-27 | 2013-06-27 | Hand tools percussion |
| DE102013212520.8 | 2013-06-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104249334A CN104249334A (en) | 2014-12-31 |
| CN104249334B true CN104249334B (en) | 2018-02-27 |
Family
ID=52017306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410293699.5A Active CN104249334B (en) | 2013-06-27 | 2014-06-26 | Hand machine tool striking mechanism |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104249334B (en) |
| DE (1) | DE102013212520A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031393A (en) * | 2004-09-30 | 2007-09-05 | 罗伯特·博世有限公司 | Handheld machine tool, especially a drill hammer and/or a percussive drill |
| CN201128146Y (en) * | 2007-12-21 | 2008-10-08 | 强网工业股份有限公司 | Output state switching mechanism |
| CN101537511A (en) * | 2008-03-18 | 2009-09-23 | 罗伯特·博世有限公司 | Portable machine tool with striker capture device and/or striker damping device |
| EP2140982A1 (en) * | 2008-07-03 | 2010-01-06 | Robert Bosch GmbH | Rotary and/or demolition hammer |
| CN201385303Y (en) * | 2009-01-11 | 2010-01-20 | 牛姣娥 | Rolling type impact device |
| CN201816040U (en) * | 2010-08-16 | 2011-05-04 | 林昌方 | Device for connecting and converting MAX or long hexagonal electric hammer |
-
2013
- 2013-06-27 DE DE102013212520.8A patent/DE102013212520A1/en active Pending
-
2014
- 2014-06-26 CN CN201410293699.5A patent/CN104249334B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101031393A (en) * | 2004-09-30 | 2007-09-05 | 罗伯特·博世有限公司 | Handheld machine tool, especially a drill hammer and/or a percussive drill |
| CN201128146Y (en) * | 2007-12-21 | 2008-10-08 | 强网工业股份有限公司 | Output state switching mechanism |
| CN101537511A (en) * | 2008-03-18 | 2009-09-23 | 罗伯特·博世有限公司 | Portable machine tool with striker capture device and/or striker damping device |
| EP2140982A1 (en) * | 2008-07-03 | 2010-01-06 | Robert Bosch GmbH | Rotary and/or demolition hammer |
| CN201385303Y (en) * | 2009-01-11 | 2010-01-20 | 牛姣娥 | Rolling type impact device |
| CN201816040U (en) * | 2010-08-16 | 2011-05-04 | 林昌方 | Device for connecting and converting MAX or long hexagonal electric hammer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104249334A (en) | 2014-12-31 |
| DE102013212520A1 (en) | 2014-12-31 |
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