CN104117728B - Reciprocally swinging is sawed - Google Patents
Reciprocally swinging is sawed Download PDFInfo
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- CN104117728B CN104117728B CN201310152523.3A CN201310152523A CN104117728B CN 104117728 B CN104117728 B CN 104117728B CN 201310152523 A CN201310152523 A CN 201310152523A CN 104117728 B CN104117728 B CN 104117728B
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- saw
- reciprocally swinging
- mandrel
- saw blade
- bearing
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Abstract
The invention provides a kind of reciprocally swinging saw, including drive component；Saw blade clamp assemblies；And the connection component of connection between them, it includes mandrel, and saw blade clamp assemblies are installed on the front end of mandrel；Sleeve pipe, the rear portion of mandrel are accommodated in sleeve pipe, and sleeve pipe is fixed in physical pendulum by the first pivot structure and moved on saw body；Angle pedestal bearing, its inner ring can be driven by drive component and rotate, one is provided with the outside of outer ring to stretch out the first oscillating rod to be formed, first oscillating rod drives mandrel to be moved back and forth in the bearing of trend of saw blade, connection component also includes a lever, the physical pendulum that lever is fixed in reciprocally swinging saw by the second pivot structure is moved on saw body, one is additionally provided with the outside of angle pedestal bearing to stretch out the second oscillating rod to be formed, second oscillating rod drives above-mentioned lever using the second pivot structure as pivot reciprocally swinging, above-mentioned sleeve pipe is deflected by lever actuated on the direction perpendicular with the bearing of trend of saw blade by pivot of the first pivot structure.
Description
Technical field
The application is related to cutting tool field, and in particular to reciprocally swinging is sawed.
Background technology
Existing various portable cutting tools, cut for the workpiece to timber, steel etc. or raw material.
In cutting operation process, especially when carrying out cutting operation to viscosity is big or intensity is big material or workpiece, meeting
Influence the cutting effect of cutting tool.
In the art, many measures have been had taken up to be used to improve cutting effect.For example, applying for artificial Milwaukee
A kind of track-type swing saw is disclosed in the patent CN125138A of Power Tool Corporation, as shown in figure 1, it has track driving
Component so that the movement locus of its saw blade is default curve.
The track-type swing saw includes being used for the driving ratch 101 for transmitting the torque from motor.Ratch 101 is with being arranged on
Gear wheel 102 in drive shaft 103 engages, wherein, drive shaft 103 is installed in rotation on casing, 102 turns of drive gear wheel
It is dynamic.
The swing saw includes the track drive assembly that oscillating traverse motion is provided for saw blade 110, the track drive assembly
Including the eccentric cam part 104 in drive shaft 103.Eccentric cam part 104 is driven with being driven when drive shaft 103 rotates
Part 105 moves up and down, and driven member 105 is assembled in one end of bearing 106, and bearing 106 and driven member 105 move up and down together.
The other end of the close saw blade 110 of bearing 106 be provided with spherical outer surface bushing 108, bushing 108 it is spherical
Outer surface may be used as pivoting centre so that bearing 106 can be swung up and down with globular lining 108 for pivoting centre.Branch
It is provided with seat 106 and prolongs the perforation that its bearing of trend opens up, the other end of mandrel 107 from bearing 106 is inserted in its internal perforation,
Mandrel 107 its extending direction can reciprocatingly slide in the interior edge of bearing 106.Bearing 106 distinguishes position with the mandrel 107 in bearing 106
In the above-mentioned both sides of globular lining 108.When drive shaft 103 rotates, eccentric cam part 104 makes bearing 106 by driven member 105
Swung up and down with together with mandrel 107 with globular lining 108 for pivoting centre, extending direction group of the saw blade 110 along mandrel 107
Mounted in its end, can also be swung up and down together with globular lining 108 for pivoting centre with mandrel 107.
Track drive assembly also includes oscillating rod 109.Drive shaft 103 is provided with tilting bearing, and the one of above-mentioned oscillating rod 109
End is connected with the outer ring of tilting bearing, and the other end is extended in bearing 106 and is connected with one end of mandrel 107.When 103 turns of drive shaft
When dynamic, the other end of the outer ring driving oscillating rod 109 of tilting bearing swings, while drives mandrel 107 in bearing 106
Moved back and forth in perforation.
Above-mentioned saw blade 110 can carry out front-rear reciprocation movement with swinging up and down in cutting, can so improve saw blade 110
Cutting speed.
However, the reciprocally swinging saw of this class formation is complicated, and it is unfavorable for the trend toward miniaturization of machine.
A kind of it is therefore desirable to new easy reciprocally swinging saw.
The content of the invention
The purpose of the present invention is the structure of simplified reciprocating swing saw, improves the cutting effect of saw.
Therefore, the invention provides a kind of reciprocally swinging saw, including drive component, for being carried for the cutting that reciprocally swinging is sawed
For power；Saw blade clamp assemblies, for clamping saw blade so that reciprocally swinging saw can be cut, saw blade is to extend along direction
Reciprocating motion is cut；And the connection component of connection drive component and saw blade clamp assemblies, it includes mandrel, the saw blade
Clamp assemblies are installed on the front end of mandrel；Sleeve pipe, the rear portion of the mandrel are accommodated in sleeve pipe, and described sleeve pipe passes through the first pivot
The physical pendulum that rotation structure is fixed in reciprocally swinging saw is moved on saw body；Angle pedestal bearing, cross section and saw blade where its diameter are prolonged
Straight line where stretching direction is inclined to set, and the inner ring of angle pedestal bearing can be driven by drive component to be rotated, on the outer ring outside of angle pedestal bearing
It is provided with one to stretch out the first oscillating rod to be formed, the first oscillating rod drives mandrel to move back and forth in the bearing of trend of saw blade；
The connection component also includes a lever, and the physical pendulum that lever is fixed in reciprocally swinging saw by the second pivot structure moves saw body
On, one is additionally provided with the outside of the angle pedestal bearing and is stretched out the second oscillating rod to be formed, the second oscillating rod drives above-mentioned thick stick
Bar is using the second pivot structure as pivot reciprocally swinging, and above-mentioned sleeve pipe is by lever actuated perpendicular with the bearing of trend of saw blade
Direction on using the first pivot structure as pivot deflect.
According to a preferred embodiment, the drive component bag motor and the drive shaft for being motor driven rotation, driving
Bearing of trend of the bearing of trend of axle parallel to saw blade.
According to a preferred embodiment, the inner ring of the angle pedestal bearing is formed on the outer surface of drive shaft, with driving
Axle is rotated and rotated, and the bearing of trend of cross section and drive shaft where the diameter of inner ring is obliquely installed.
According to a preferred embodiment, first oscillating rod includes a connecting rod, and one end and the mandrel of connecting rod lead to
Cross pin-and-hole structure and form hubbing structure, the first oscillating rod offers the groove for extending along direction, and the other end of connecting rod houses
In in groove, the first oscillating rod drives mandrel to move back and forth by connecting rod.
According to a preferred embodiment, the bearing of trend of the mandrel is identical with the bearing of trend of saw blade, above-mentioned connection
The bearing of trend of the pin and saw blade of bar and mandrel is perpendicular.
According to a preferred embodiment, the second oscillating rod is provided with and can received perpendicular to the first oscillating rod, one end of lever
Hold the first perforation of the second oscillating rod, middle part and the physical pendulum of lever move saw body and be connected by the second pivot structure, and lever passes through
First perforation is swung by the driving of the second oscillating rod by pivot of the second pivot structure.
According to a preferred embodiment, the other end of the lever is provided with the cam surface abutted with above-mentioned sleeve pipe, quilt
The lever that second oscillating rod drives and swung is deflected by cam surface drive sleeve by pivot of the first pivot structure.
According to a preferred embodiment, set between the one end of sleeve pipe away from saw blade and the dynamic saw body of physical pendulum flexible
Part, elastic component provide the elastic reset power opposite with the driving force of above-mentioned lever actuated sleeve pipe deflection.
According to a preferred embodiment, first pivot structure is located at saw blade clamp assemblies and connecting rod and mandrel
Between pin-and-hole hubbing structure, the pin-and-hole hubbing structure of connecting rod and mandrel is between the first pivot structure and elastic component.
According to a preferred embodiment, the central axis of first pivot structure and the central shaft of the second pivot structure
Line is parallel.
It is few, compact-sized according to the component number that the reciprocally swinging of present invention saw is included, accordingly alleviate toward physical pendulum
The weight of dynamic saw, is more suitable for handheld operation.
Brief description of the drawings
May be better understood from the preferred embodiment of the application described below in conjunction with the accompanying drawings the above-mentioned of the application and
Further feature and advantage, wherein：
Fig. 1 is the partial sectional view sawed according to the reciprocally swinging of prior art；
Fig. 2 is the longitudinal sectional view of reciprocally swinging saw according to a preferred embodiment of the invention, wherein such as shell, motor
Deng part be removed；
Fig. 3 is the stereogram that the reciprocally swinging corresponding to Fig. 2 according to a preferred embodiment of the invention is sawed.
Embodiment
Specific embodiment description below with reference to the present invention is sawed as the reciprocally swinging of cutting tool.Under it is to be understood that
The description in face is equally applicable to cut the portable cutting tool of various workpiece or material, such as stone cutter etc..Here,
" workpiece " refers to any block or cleavable material of tabular, such as timber, plastics, glass, metal etc..
In order to which the present invention is more easily understood, as shown in Figures 2 and 3, herein, the left side of reciprocally swinging saw is defined
For " front end ", opposite opposite side is defined as " rear end ", and upside defines " top ", and downside defines " lower section ".
Include the shell for the operation handle that the hand with the person of being adapted in use to grasps according to the reciprocally swinging of present invention saw 100
(not shown), the drive component for being arranged at enclosure and connection component and outside shell front end saw blade clamp assemblies
10。
Above-mentioned saw blade clamp assemblies 10 are driven by saw blade clamp assemblies to clamping saw blade, drive component by connection component
The saw blade of 10 clampings carries out above-mentioned reciprocal cutting movement.
As shown in Figure 2, drive component includes motor (not shown) and the gear 1 and drive shaft by motor-driven rotation
2.The gear 1 is installed on driving shaft 2, and is linked with it.Drive shaft 2 is rotationally pacified by the bearing (not shown) at both ends
In shell.This is well known in the art, and no longer specifically describes here.
The saw blade that the connection component can clamp saw blade clamp assemblies 10 carries out above-mentioned reciprocal cutting movement, so that
Saw blade reaches the effect of cutting.
As shown in Fig. 2 connection component includes being arranged at the supermedial angle pedestal bearing 21 of drive shaft 2, being arranged on angle pedestal bearing 21
The first oscillating rod 3, the mandrel 5 driven by the first oscillating rod 3 and the sleeve pipe 11 being sheathed on outside mandrel 5.
The cross section of the angle pedestal bearing 21 is inclined to set with the center line C of drive shaft 2, i.e., the angle formed between the two is big
It is less than 90 degree in 0 degree.The inner ring 22 of described angle pedestal bearing 21 is formed at the outer surface of drive shaft 2, and the cross section of inner ring 22 is as above
The center line with drive shaft 2 is inclined to set.It is provided with the outer surface of the outer ring 23 of angle pedestal bearing 21 along angle pedestal bearing 21
Radially extend the first oscillating rod 3 to be formed.There is ball (not shown) between the inner ring 22 of angle pedestal bearing 21 and outer ring 23, made with this
The effect of bearing is formed between the inner ring 22 of angle pedestal bearing 21 and outer ring 23, i.e., inner ring 22 can rotate relative to outer ring 23.
Above-mentioned first oscillating rod 3 includes a connecting rod 4, is offered on the free end face of the first oscillating rod 3 along its extension side
The groove 37 formed to extension, one end of above-mentioned connecting rod 4 are contained in groove 37, and the other end and the mandrel 5 of connecting rod 4 pass through
Pin 6 is connected, and connecting rod 4 can be rotated with 6 pins for pivot relative to mandrel 5.
The front end of the mandrel 5 is provided with the above-mentioned saw blade clamp assemblies 10 for clamping saw blade.The rear end of mandrel 5 covers certainly
In the front end plug-in-sleeve of pipe 11, part mandrel 5 is contained in sleeve pipe 11, is provided with the inwall of sleeve pipe 11 in continuously arranged
First bushing 7 and the second bushing 8, mandrel 5 can slide in interior edge the first bushing 7 of sleeve pipe 11 and the second bushing 8.Described sleeve pipe 11
The cage connection sawed by a hinge arrangement 12 with reciprocally swinging of outside, sleeve pipe 11 can be by hinge arrangement 12 relative to past
The shell of multiple swing saw rotates by rotation centerline of the central axis B of hinge arrangement 12, and described sleeve pipe 11 can also be in reciprocal
Other fixed structures of swing saw are connected by hinge arrangement 12, as long as can be the strong point that sleeve pipe 11 provides rotation.
Above-mentioned first oscillating rod 3 is substantially vertical setting with mandrel 5, and during operation, the inner ring 22 of angle pedestal bearing 21 is with driving
Axle 2 is rotated, and when inner ring 22 rotates, outer ring 23 is connected by connecting rod 4 because of the first oscillating rod 3 with mandrel 5, it is impossible to inner ring 22
Rotate together.Because the relative drive shaft 2 of inner ring 22 is obliquely installed, the inner ring of heeling condition when rotating, can by inner ring 22 with it is outer
Ball between circle 23 drives the reciprocally swinging along the longitudinal direction of outer ring 23.Thus enable the first oscillating rod 3 past in the longitudinal direction
Physical pendulum moves, and is contained in because of connecting rod 4 in the groove 37 of first oscillating rod 3, and when the first oscillating rod 3 is swung, connecting rod 4 exists simultaneously
Reciprocally swinging on fore-and-aft direction.
As shown in Fig. 2 when 4 reciprocally swinging in the longitudinal direction of connecting rod, the mandrel that is connected with connecting rod 4 by pin 6
5, reciprocally swinging in the longitudinal direction can be driven.Thus reach the reciprocating motion of saw blade in the longitudinal direction, cut with reaching
The effect of cutting.
The second oscillating rod to be formed is radially extended as shown in figure 3, being additionally provided with the outer ring of bearing 21 along angle pedestal bearing 21
31, the first oscillating rod 3 is substantially vertical setting with the second oscillating rod 31, and the angle of the first oscillating rod 3 and the second oscillating rod 31 can
Think 70 degree to 110 degree.
Described assemble also includes a lever 15, and the downside of lever 15 is provided with the first perforation 16, set in the middle part of lever
Be equipped with the second perforation 14, the upside free end of lever is provided with a cam surface 13, the second perforation 14 of the lever with it is above-mentioned outer
Corresponding post on shell coordinates, so that lever 15 can surround the post rotation on shell.First perforation 16 of lever 15 is used to receive
Hold the second oscillating rod 31, the first 16 long and narrow hole vertically of perforation, for absorbing the in the vertical direction of the second oscillating rod 31
Swing displacement.Because the second oscillating rod 31 is also disposed on the outer surface of outer ring 23 of angle pedestal bearing 21, when the inner ring of angle pedestal bearing 21
22 by driving when being rotated, and the second oscillating rod 31 also can 3 such reciprocally swinging, and driving in the longitudinal direction of the first oscillating rod as described above
Dynamic lever 15 (Long Circle) is with reciprocally swinging in the longitudinal direction therewith, in this way, then above-mentioned lever 15 can be with the second perforation
14 be pivot reciprocally swinging in the longitudinal direction, and drives the free end with cam surface 13 also reciprocal in the longitudinal direction
Swing.
When following lever 15 to swing, cam surface 13 can be done with the downside surface of sleeve pipe 11 for the free end of above-mentioned lever 15
Relate to.And in 15 reciprocally swinging of lever, energy drive sleeve 11 is upward as rotation centerline using the central axis of hinge arrangement 12
Deflection, as shown in figure 3, the rear upper side of sleeve pipe 11 is provided with a spring 9, spring 9 can provide sleeve pipe 11 by lever 15 drive to
Reseting elasticity after upper deflecting, in this way, when 15 reciprocally swinging of lever, sleeve pipe 11 just can using the central axis of hinge arrangement 12 as
Rotation centerline reciprocally swinging along the vertical direction.Mandrel 5 is located in sleeve pipe 11, when sleeve pipe 11 is swung, also drives mandrel 5 to swing,
The saw blade being installed on the saw blade clamp assemblies 10 of the front end of mandrel 5 can also be swung by driving.In this way, then reach saw blade in upper and lower
Oscillating traverse motion using the central axis of hinge arrangement 12 as rotation centerline upwards.When sleeve pipe 11 is swung in above-below direction
When, the connecting rod 4 being connected with mandrel 5 can be slided in the groove 37 of the first oscillating rod 3, to adjust the oscillating rod 3 of mandrel 5 and first
The distance changed in the vertical direction by the swing of sleeve pipe 11.This structure can also be arranged to, the oscillating rod of connecting rod 4 and first
3 are set integrally, and by setting a hole on mandrel 5, connecting rod 4 is extended into the hole of mandrel 5, and adjusting mandrel 5 and first with this puts
The distance that lever 3 changes by the swing of sleeve pipe 11 in the vertical direction.Ensure that mandrel 5 moves back and forth in the longitudinal direction with this
While, sleeve pipe 11 can reciprocally swinging in the vertical direction.
From the foregoing, it will be observed that saw blade while the reciprocating motion of fore-and-aft direction, can also carry out reciprocally swinging in the vertical direction.
Cutting effect of saw blade is reached in the reciprocating motion of fore-and-aft direction, and the swing on above-below direction can strengthen the cutting effect of saw blade.
When reciprocally swinging saw carries out cutting to workpiece to advance, set can also be turned into the reaction force of saw blade by being cut workpiece
The swing reset force of pipe 11.
Above for the present invention multiple embodiments be described, but the present invention be not intended to be limited to be described above and
The embodiment of accompanying drawing signal.Feature on one embodiment description is equally applicable to other embodiments of the invention, different real
New embodiment can be bound to each other to form by applying the feature of example.Without departing from the spirit and scope being defined by the below claims
In the case of, those skilled in the art can carry out various modifications and variation to above-described embodiment.
Claims (12)
1. a kind of reciprocally swinging saw, including：
Drive component, for providing power for the cutting that reciprocally swinging is sawed；
Saw blade clamp assemblies, for clamping saw blade so that reciprocally swinging saw can be cut, saw blade is to extend along the past of direction
Multiple motion is cut；And
The connection component of drive component and saw blade clamp assemblies is connected, it includes：
Mandrel, the saw blade clamp assemblies are installed on the front end of mandrel；
Sleeve pipe, the rear portion of the mandrel are accommodated in sleeve pipe, and described sleeve pipe is fixed in toward physical pendulum by the first pivot structure
On dynamic saw body；
Angle pedestal bearing, straight line where the bearing of trend of cross section and saw blade where its diameter are inclined to set, the inner ring of angle pedestal bearing
Can be driven and rotate by drive component, on the outside of the outer ring of angle pedestal bearing on be provided with one and stretch out the first oscillating rod to be formed, first
Oscillating rod drives mandrel to be moved back and forth in the bearing of trend of saw blade；
Characterized in that, the connection component also includes a lever, lever is fixed in reciprocally swinging by the second pivot structure
On saw body, one is additionally provided with the outside of the angle pedestal bearing and is stretched out the second oscillating rod to be formed, the driving of the second oscillating rod
Above-mentioned lever is using the second pivot structure as pivot reciprocally swinging.
2. reciprocally swinging according to claim 1 saw, it is characterised in that the drive component bag motor and be motor driven
The drive shaft of rotation, the bearing of trend of the bearing of trend of drive shaft parallel to saw blade.
3. reciprocally swinging saw according to claim 2, it is characterised in that the inner ring of the angle pedestal bearing is formed at drive shaft
On on outer surface, rotated with drive shaft turns, the bearing of trend of cross section and drive shaft where the diameter of inner ring tilts
Set.
4. reciprocally swinging saw according to claim 1, it is characterised in that first oscillating rod includes a connecting rod, even
One end of extension bar forms hubbing structure with mandrel by pin-and-hole structure, and the first oscillating rod offers the groove for extending along direction,
The other end of connecting rod is contained in groove, and the first oscillating rod drives mandrel to move back and forth by connecting rod.
5. reciprocally swinging saw according to claim 4, it is characterised in that the extension of the bearing of trend and saw blade of the mandrel
Direction is identical, and above-mentioned connection connecting rod and the pin of mandrel and the bearing of trend of saw blade are perpendicular.
6. reciprocally swinging saw according to claim 1, it is characterised in that the folder between the second oscillating rod and the first oscillating rod
Angle is 70 degree of -110 degree.
7. reciprocally swinging saw according to claim 1, it is characterised in that one end of lever, which is provided with, can house the second swing
First perforation of bar, the first perforation are long and narrow hole, and middle part and the physical pendulum of lever move saw body and be connected by the second pivot structure,
Lever is swung by the first perforation by the driving of the second oscillating rod by pivot of the second pivot structure.
8. reciprocally swinging saw according to claim 7, it is characterised in that the other end of the lever is provided with and above-mentioned set
Pipe abut cam surface, by the second oscillating rod drive and swing lever by cam surface drive sleeve using the first pivot structure as
Pivot deflects.
9. reciprocally swinging saw according to claim 1, it is characterised in that in the one end of sleeve pipe away from saw blade and multiple swing saw
Elastic component is provided between body, elastic component provides the elastic reset opposite with the driving force of above-mentioned lever actuated sleeve pipe deflection
Power.
10. reciprocally swinging saw according to claim 9, it is characterised in that first pivot structure is located at saw blade clamping
Between component and connecting rod and the pin-and-hole hubbing structure of mandrel, the pin-and-hole hubbing structure of connecting rod and mandrel pivots positioned at first to be tied
Between structure and elastic component.
11. reciprocally swinging according to claim 1 saw, it is characterised in that the central axis of first pivot structure with
The central axis of second pivot structure is parallel.
12. reciprocally swinging saw according to claim 1, it is characterised in that sleeve pipe is by lever actuated in the extension with saw blade
Deflected on the perpendicular direction in direction by pivot of the first pivot structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152523.3A CN104117728B (en) | 2013-04-27 | 2013-04-27 | Reciprocally swinging is sawed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152523.3A CN104117728B (en) | 2013-04-27 | 2013-04-27 | Reciprocally swinging is sawed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104117728A CN104117728A (en) | 2014-10-29 |
| CN104117728B true CN104117728B (en) | 2018-02-02 |
Family
ID=51763490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310152523.3A Active CN104117728B (en) | 2013-04-27 | 2013-04-27 | Reciprocally swinging is sawed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104117728B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015006471A1 (en) * | 2015-05-21 | 2016-11-24 | STAMM GmbH & Co. KG | mover |
| CN110732726B (en) * | 2018-07-20 | 2022-02-11 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6249979B1 (en) * | 1998-08-13 | 2001-06-26 | Milwaukee Electric Tool Corporation | Orbital reciprocating saw |
| CN1330448C (en) * | 2004-02-25 | 2007-08-08 | 苏州宝时得电动工具有限公司 | Reciprocating rod balancing mechanism of reciprocating type electric power tool |
| CN2936561Y (en) * | 2006-07-28 | 2007-08-22 | 苏州宝时得电动工具有限公司 | Electric tool |
| US7797841B2 (en) * | 2006-08-29 | 2010-09-21 | Robert Bosch Gmbh | Drive mechanism for a reciprocating saw |
| CN202556373U (en) * | 2012-03-21 | 2012-11-28 | 南京德朔实业有限公司 | Reciprocating electric tool balancing mechanism |
| CN102794503B (en) * | 2012-09-05 | 2014-12-17 | 盈福胜品牌国际有限公司 | Electric reciprocating saw |
-
2013
- 2013-04-27 CN CN201310152523.3A patent/CN104117728B/en active Active
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| Publication number | Publication date |
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| CN104117728A (en) | 2014-10-29 |
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Address after: 310052 Binjiang District, Zhejiang Province, Hangzhou Road, No. 567 Applicant after: Bosch Power Tools (China) Co., Ltd. Address before: 410000 No. 567, bin Kang Road, Changsha, Hunan, Binjiang District Applicant before: Bosch Power Tools (China) Co., Ltd. |
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