CN103904809B - Electric tool - Google Patents
Electric tool Download PDFInfo
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- CN103904809B CN103904809B CN201310585300.6A CN201310585300A CN103904809B CN 103904809 B CN103904809 B CN 103904809B CN 201310585300 A CN201310585300 A CN 201310585300A CN 103904809 B CN103904809 B CN 103904809B
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- bearing
- component
- labyrinth sealing
- elastomer
- motor
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Abstract
The present invention provides a kind of electric tool at bearing portion with sufficient dust tightness and vibrationproof.This electric tool possesses: as the motor (31) in the source of driving；The housing (11) of storage motor (31)；The motor reel (32) of motor (31)；Motor reel (32) is carried out the bearing of axle supporting；The labyrinth sealing of the outer ring being assemblied in described bearing forms component (20)；The bearing reception hole (12b) that bearing is supported；Form the adjacent configuration of component (20) with labyrinth sealing and cooperate with labyrinth sealing formation component (20) and form the dust-proof axle ring (40) of labyrinth gap, this electric tool is characterised by, labyrinth sealing is formed in component (20), it is formed with elastomer department of assembly at its peripheral part, being equipped with elastomer in described elastomer department of assembly, the bearing being equipped with labyrinth sealing formation component (20) is bearing in via elastomer in bearing reception hole (12b).
Description
Technical field
The present invention relates to dust tight construction and the vibrationproof structure of the bearing portion of a kind of electric tool axis supports electric arbor etc.
Make.
Background technology
All the time, in the electric tool using motor as the source of driving, in order to prevent the dust such as cutting powder from invading
Enter the bearing of axle supports electric arbor, give dust tight construction.Such as, in the electric tool described in following patent document 1, logical
Cross that to be formed, by the labyrinth sealing assembled in the outer ring of bearing, the dust-proof axle ring that component (bearing cap) is provided adjacent to bearing (anti-
Dirt ring), the ring-type projection that formed around the opening portion of the bearing reception hole (bearing insertion hole) of motor field frame carry out shape
Become labyrinth gap, thus prevent dust from invading bearing.
Additionally, in the record of following patent document 1, disclose and formed labyrinth sealing by rubber or resin and form component,
When selecting rubber, owing to bearing is supported in the labyrinth sealing of rubber forms the bearing reception hole of component, because of
This inhibits the transmission to motor field frame of vibration of motor reel.
[citation]
[patent document]
Patent document 1: Japanese Unexamined Patent Publication 8-182242 publication
[inventing problem to be solved]
But, as it has been described above, when by rubber make labyrinth sealing form component time, owing to its form accuracy is low, therefore
It is difficult to labyrinth gap be set to and design consistent size.And, i.e. allow to make the shape consistent with design, in group
During dress, the Cat-in resisting force etc. when being likely to be due to insert bearing reception hole causes change in shape.Additionally, it is possible to due to electric tool
Load during operating, use all the year round cause its change in shape, consequently, it is possible to cause labyrinth gap can not maintain and design one
The size caused.Such as, labyrinth gap vanishing, between the component forming labyrinth gap, come in contact (sliding contact)
Time, produce abrasion powder, the danger of bearing damage can be caused owing to this abrasion powder invades Bearing inner.
Summary of the invention
The present invention makes in view of above-mentioned problem, its object is to, it is provided that stably have in bearing portion
Sufficiently dust tightness and the electric tool of vibrationproof.
[for solving the means of problem]
Electric tool involved in the present invention possesses: as the motor in the source of driving；Receive the housing of described motor；Institute
State the motor reel of motor；Described motor reel is carried out the bearing of axle supporting；It is assemblied in the labyrinth of the outer ring of described bearing
Formula seals and forms component；The bearing reception hole that described bearing is supported；Adjoin with described labyrinth sealing formation component and join
Put and formed with described labyrinth sealing component to cooperate and form the dust-proof axle ring of labyrinth gap, the feature of described electric tool
Being, described labyrinth sealing is formed in component, is formed with elastomer department of assembly at its peripheral part, in described elastomer department of assembly
Being equipped with elastomer, the described bearing being equipped with described labyrinth sealing formation component is bearing in described via described elastomer
In bearing reception hole.
In electric tool involved in the present invention, such a way can be taked, i.e. the outer surface of described elastomer with
The inner peripheral surface of described bearing reception hole connects, and forms the outer surface of component and described bearing reception hole in described labyrinth sealing
Gap it is formed with between inner peripheral surface.
And, in electric tool involved in the present invention, such a way can be taked, i.e. described elastomer assembles
Portion is formed as circumferential slot.
It addition, in electric tool involved in the present invention, such a way can be taked, i.e. described elastomer is formed
For ring-type.
Additionally, in electric tool involved in the present invention, such a way can be taked, i.e. at described dust-proof axle ring
Outer peripheral face and the inner peripheral surface of described bearing reception hole between formed labyrinth gap.
[invention effect]
In accordance with the invention it is possible to provide the electric tool stably with sufficient dust tightness and vibrationproof at bearing portion.
Accompanying drawing explanation
Fig. 1 is the top view of the electric tool involved by present embodiment.
Fig. 2 is the left side view of the electric tool involved by present embodiment.
Fig. 3 is the figure of the section A-A representing Fig. 2.
Fig. 4 is the major part enlarged drawing of Fig. 3.
Fig. 5 is the figure that another embodiment is described.
Detailed description of the invention
Hereinafter, Fig. 1～Fig. 4 is utilized to illustrate for the optimal embodiment implementing the present invention.It addition, in following enforcement
In mode, exemplify and the present invention is useful in the situation of hand electric grinder illustrates.And, following embodiment party
Invention involved by each claim is not defined by formula, and, in embodiment, the combination entirety of the feature of explanation is not
Must be necessary in the solution of invention.
Fig. 1 is the top view of the electric tool involved by present embodiment.Fig. 2 is the electronic work involved by present embodiment
The left side view of tool.Fig. 3 is the figure of the section A-A representing Fig. 2.Fig. 4 is the major part enlarged drawing of Fig. 3.And, this specification
In, illustrate to regulation " forward and backward " as shown in fig. 1.
As shown in Figure 1 to 4, the hand electric grinder 10 as the electric tool involved by present embodiment has
Standby: the housing 11 of cylindrical shape in the way of holding, can be shaped generally as by operator；Rotate for carrying out the conduct of grinding operation
The discoid emery wheel 21 of instrument.
The structure member that housing 11 is main with following parts is formed, i.e. as the motor casing 12 of casing, its
The major part becoming the motor 31 in driving source is accommodated in inside；Gear-box 13, before it is arranged in motor casing 12
Side, and the driving force being made up of multiple gear trains etc. being used for transmitting the rotary driving force from motor 31 to emery wheel 21 is passed
Pass unit storage；As the back cover 14 of cover component, it is arranged in the rear of motor casing 12, and will be used for supplying motor 31
To power supply unit storages such as the power line of electric power, block terminals.
Motor casing 12 is formed as tubular by the metal such as resin or aluminium alloy.Motor storage in motor casing 12
The periphery of part is constituted as the handle part being held by the operator, and is configured with switch 28 in front side.Motor casing 12
Outer contour shape is shaped generally as cylindrical shape in the way of operator easily holds, and is formed on its surface for anti-skidding concavo-convex
Shape 12a.It addition, in present embodiment, motor casing 12 is formed as tubular but it also may for the structure being divided into two.
The gear-box 13 linked with the front side of motor casing 12 across inner shell 16 is by gold such as such as aluminium alloys
The component belonging to system is constituted.And, the emery wheel as throw carrying out grinding operation it is configured with in the bottom of this gear-box 13
21, in the rear side (rear side) of emery wheel 21, it is provided with safety guard 22 to make cutting powder etc. not disperse to operator.
Back cover 14 is formed as tubular by resin.By unloading this back cover 14, it is possible to carry out the power supply unit arranged in inside
Deng maintenance.It addition, in present embodiment, back cover 14 is formed as tubular but it also may be set to the structure being divided into two.One point
Be two the situation of structure by unloading the component of side, and the maintenance of the power supply unit etc. arranged in inside can be carried out.
As shown in the in-built Fig. 3 depicting hand electric grinder 10, receive in the inside of motor casing 12
Receive and become the motor 31 in the driving source for driving emery wheel 21.Motor 31 possesses: be fixed in motor casing 12
Stator 31a；It is rotatably disposed in the rotor 31b of the inside of stator 31a.Rotor 31b possesses motor reel 32 and commutator 33,
The leading section 32a of motor reel 32 is prominent in gear-box 13 in motor casing 12, and axle is bearing in and is assemblied in gear-box
The anterior bearing 17 of 13.On the other hand, rearward end 32b of motor reel 32 at the rear portion of motor casing 12 by rear bearings 18
Axle supports.Rear bearings 18 forms component 20 via the bearing rubber 41 as elastomer described later with labyrinth sealing and supports
(with reference to Fig. 4) in the bearing reception hole 12b with the end being formed at the bearing support 12c at rear portion of motor casing 12.Cause
This, motor reel 32 is by being supported both ends 32a, 32b by bearing 17,18 axle of front and rear part such that it is able to High Rotation Speed.Separately
Outward, in present embodiment, use the deep groove ball bearings with seal as the bearing 17,18 of front and rear part.
The fan of the substantially bowl shape being provided adjacent to motor 31 is possessed in the side of the leading section 32a of motor reel 32
Cover 36 and fan guard 36 are provided adjacent to and are fixed on the cooling fan 19 of motor reel 32.By cooling fan 19 is arranged in
In motor casing 12, serve the effect making the cooling wind inside by motor casing 12.That is, when cooling fan 19 and electricity
When motivation axle 32 rotates together, extraneous gas imports from the opening of back cover 14, and by back cover 14 and motor casing 12
Gap and after motor 31 grade is cooled down, discharge to equipment from the outlet of gear-box 13.
Rotor 31b possesses commutator 33, and commutator 33 is arranged on the rear portion of motor reel 32.Along being arranged at outside motor
The brush 35 that the brush carrier 38 of shell 12 is the most directed contacts with commutator 33.Brush carrier 38 in order to by brush 35 to commutation
The direction of device 33 stably guides, and extended to the periphery close proximity with commutator 33.For commutator 33 and electricity
Brush 35 and brush carrier 38, also utilize the cooling wind imported by the effect of above-mentioned cooling fan 19 to implement cooling.
It follows that explanation rear bearings 18 formed dust tight construction and vibration absorbing structure.
As shown in Figure 4, rear bearings 18 possesses outer ring 18a and inner ring 18b and multiple firm ball, and inner ring 18b press-in is fixing
Rearward end 32b at motor reel 32.It is equipped with resinous labyrinth sealing at the outer ring 18a of rear bearings 18 and forms component
20.Labyrinth sealing forms component 20 and forms the labyrinth gap as dust tight construction for cooperating with dust-proof axle ring 40 described later
Component.The bearing that the internal side diameter of labyrinth sealing formation component 20 possesses the chimeric outer ring 18a being inserted with rear bearings 18 is embedding
Close insert hole 20a, with than bearing be fitted together to insert the little internal diameter of hole 20a bearing be fitted together to insert the rear side of hole 20a formed and after
Portion's bearing 18 carries out contacting wall 20b abutted.It addition, bearing be fitted together to insert hole 20a axis direction length be set greater than after
The axis direction length (width) of portion's bearing 18, make rear bearings 18 chimeric be inserted in bearing chimeric insert hole 20a and with support
Connecing under the state that wall 20b abuts, it is prominent from the front side side of rear bearings 18 that labyrinth sealing forms the forward portion of component 20
Go out.The outside diameter of labyrinth sealing formation component 20 possesses the big footpath of the slightly smaller external diameter of the internal diameter having than bearing reception hole 12b
Peripheral part 20c, the path peripheral part 20d formed in the front of big footpath peripheral part 20c.The allocation position of path peripheral part 20d with
The part prominent from the front side side of above-mentioned rear bearings 18 is substantially uniform at axis direction.And, at big footpath peripheral part
The axis direction central portion of 20c is formed with the circumferential slot as elastomer department of assembly for assembling bearing rubber 41 described later
20e。
The circumferential slot 20a that the axis direction central portion of the big footpath peripheral part 20c forming component 20 in labyrinth sealing is formed
It is equipped with the ring-type bearing rubber 41 as elastomer.Form component 20 in labyrinth sealing and be equipped with the shape of bearing rubber 41
Under state, the diameter of the outer peripheral face of bearing rubber 41 diameter than the big footpath peripheral part 20c that labyrinth sealing forms component 20 is slightly larger
Ground sets.Therefore, the rear bearings 18 being equipped with labyrinth sealing formation component 20 is bearing in bearing via bearing rubber 41
In reception hole 12b.Specifically, when labyrinth sealing formation component 20 is equipped with bearing rubber 41, bearing rubber
The diameter of the outer peripheral face of 41 be set as than labyrinth sealing formed the diameter of big footpath peripheral part 20c of component 20 go out greatly 0.1mm～
0.9mm, chimeric when being inserted in bearing reception hole 12b in this condition, the outer peripheral face of bearing rubber 41 is with bearing reception hole 12b's
Inner peripheral surface connect and labyrinth sealing formed component 20 big footpath peripheral part 20c and bearing reception hole 12b inner peripheral surface it
Between form gap slightly.It addition, in present embodiment, bearing rubber 41 is shaped by the NBR that rubber hardness is Hs50 ± 5, fan
Palace formula seals formation component 20 and is shaped by Merlon (PC) or the polyamide (PA) mixed with glass fibre.And, this embodiment party
In formula, the front portion of bearing reception hole 12b is formed with internal diameter towards front openings the most expanding wide diameter portion 12d, it is thus possible to
Enough carry out being equipped with labyrinth sealing and form suitable to bearing reception hole 12b of component 20 and the rear bearings 18 of bearing rubber 4
Smooth insertion.
Dust-proof axle ring 40 forms the labyrinth gap as dust tight construction for cooperating with labyrinth sealing formation component 20
Component.Dust-proof axle ring 40 is being fixed on the rearward end of motor reel 32 with labyrinth sealing formation component 20 adjoining position
32b, and, its position is in the inner side of bearing reception hole 12b.Dust-proof axle ring 40 is the resinous component of substantially cylindrical shape,
By being set with making the external diameter of its peripheral part 40b internal diameter less than bearing reception hole 12b, thus outside dust-proof axle ring 40
Labyrinth gap is formed between the inner peripheral surface of perimembranous 40b and bearing reception hole 12b.And, in the rear bearings of dust-proof axle ring 40
The side of 18 sides (rear side) is provided with inserts the path peripheral part 20d of labyrinth sealing formation component 20 thus in this side
And relief portion 40a formed as ring-type groove with forming labyrinth gap between path peripheral part 20d.Like this, this reality
Execute in mode, form dirt by being formed component 20 with dust-proof axle ring 40 with labyrinth sealing by the inner peripheral surface of bearing reception hole 12b
Angstrom the labyrinth gap invading path length, thus possess sufficient anti-dust performance.It is additionally, since by bearing reception hole 12b's
Inner peripheral surface concentrates on bearing with the key element of the composition labyrinth gap that dust-proof axle ring 40 and labyrinth sealing form component 20 composition
The configuration medially of reception hole 12b, it is achieved that compact labyrinth sealing structure.It addition, construct in this labyrinth sealing
In, by using the inner peripheral surface of bearing reception hole 12b as the key element constituting labyrinth gap, thus at the housing being divided into two
Electric tool can also use.
By above-mentioned structure, in the hand electric grinder 10 of present embodiment, owing to being set to following structure,
That is, the circumferential slot 20a of the big footpath peripheral part 20c forming component 20 in resinous labyrinth sealing assembles bearing rubber 41, and
Make to be equipped with labyrinth sealing and form the rear bearings 18 of component 20 across bearing rubber 41 by bearing reception hole 12b supporting
Structure, therefore inhibits the vibration of motor 31 to the transmission of housing 11 by the elasticity of bearing rubber 41.And, by by shape
Shape precision is high and because of load and form labyrinth sealing with the resin that the change in shape caused days is few and form component 20, thus
Labyrinth gap can be set and maintain into the size consistent with design, it is thus possible to play anti-dust performance for a long time.It addition,
By assembling bearing rubber 41 at circumferential slot 20a, it is possible to when chimeric insertion bearing reception hole 12b, prevent bearing rubber 41
Position deviation.
The outer peripheral face being additionally, since bearing rubber 41 connects and close in labyrinth type with the inner peripheral surface of bearing reception hole 12b
Seal and between big footpath peripheral part 20c and the inner peripheral surface of bearing reception hole 12b of formation component 20, be formed with gap slightly, therefore,
When the operating of hand electric grinder 10, make the elastic deformation of bearing rubber 41 when motor reel 32 bears big loading
When quantitative change is big, it is possible to make the inner peripheral surface of big footpath peripheral part 20c and the bearing reception hole 12b of labyrinth sealing formation component 20 contact
Thus the elastic deformation amount of bearing rubber 41 is limited, allow therefore, it is possible to the position deviation of motor reel 32 is converged in
Within value.Therefore, it is possible to prevent the unfavorable condition contacted etc. of the stator caused because of the position deviation of motor reel 32 and rotor.
And, it is possible to prevent the deterioration caused due to the increase of the elastic deformation amount of bearing rubber 41.
Further, since the structure that component 20 forms will be formed with dust-proof axle ring 40 with labyrinth sealing by bearing reception hole 12b
The component becoming labyrinth gap concentrates on the setting medially of bearing reception hole 12b, therefore is capable of compact labyrinth sealing
Structure such that it is able to contribute to the miniaturization of electric tool.
Additionally, by the elastic deformation of bearing rubber 41, it is also possible to realize the motor reel 32 caused because of the error of parts
The misaligned absorption of axis.
Above, the optimal embodiment of the present invention is illustrated, but the technical scope of the present invention does not limit
In the scope described in above-mentioned embodiment.Can also be in the additional numerous variations of above-mentioned embodiment or improvement.
Such as, in the above-described embodiment, to the form implementing the present application in hand electric grinder 10
It is illustrated, but can also carry out in the first-class enforcement of electric trimmer, electric drill.And, at above-mentioned embodiment
In, rear bearings 18 is set to deep groove ball bearings, but it can also be provided that the bearings such as angular contact ball bearing.It addition, upper
In the embodiment stated, motor 31 is set to commutator motor, but can also be the motor of other forms.
And, in the above-described embodiment, bearing rubber 41 is shaped by the NBR that rubber hardness is Hs504 ± 5, but
Resilient material forming can also be had by silicon rubber, fluorubber etc..And, in the above-described embodiment, labyrinth sealing
Form component 20 to be shaped by Merlon (PC) or the polyamide (PA) mixed with glass fibre, but can also be formed by metal.
And, in the above-described embodiment, form the axis side of the big footpath peripheral part 20c of component 20 in labyrinth sealing
Formed to central portion, circumferential slot 20a as elastomer department of assembly is assembled as the ring-type bearing rubber 41 of elastomer, so
And other embodiment can also be used in the present invention.To this, other the enforcement that the present invention can be used with reference to Fig. 5
Mode illustrates.It addition, there is the portion that the incomplete structure as above-mentioned embodiment is illustrated in the following description
Point.As it is shown in figure 5, in other the embodiment that the present invention can use, bearing reception hole 52 possesses from open side by suitable
Sequence makes the most expanding wide diameter portion 12d of internal diameter forwards opening, large-diameter portion 52a, minor diameter part 52b, at large-diameter portion 52a and path
The connecting portion of portion 52b is formed with wall 52c.Labyrinth sealing forms component 60 and possesses protruding part 60b at peripheral part 60a.As bullet
The bearing rubber 71 of gonosome is with ring-type formation, and after labyrinth sealing forms the peripheral part 60a and protruding part 60b of component 60
Side flank abutment ground assembling.It is fitted together at the bearing 18 being equipped with labyrinth sealing formation component 60 and is inserted in bearing reception hole 52
Under state, bearing rubber 71 is arranged between protruding part 60b and wall 52c, and the inner peripheral surface phase of its outer peripheral face and large-diameter portion 52a
Connect.And, between the outer surface and the inner peripheral surface of large-diameter portion 52a of protruding part 60b, it is formed with gap slightly.By using this
Plant structure, it is possible to obtain the effect as above-mentioned embodiment.
And, in the above-described embodiment, form component being formed at labyrinth sealing as elastomer department of assembly
The circumferential slot 20a of the axis direction central portion of the big footpath peripheral part 20c of 20, is assembled as the ring-type bearing rubber of elastomer
41, but it can also be provided that following structure, i.e. the peripheral part forming component 20 in labyrinth sealing is formed as elastomer
Multiple holes of department of assembly, and the structure of the bearing rubber of component location guide post shapes in the plurality of hole.
Recording this it appears that the form that addition of this change or improvement is also contained in from the scope of Patent request
In the technical scope of the present invention.
Reference numeral explanation
10-hand electric grinder, 11-housing, 12-motor casing, 12a-concaveconvex shape, 12b-bearing are received
After hole, 12c-bearing support, 12d-wide diameter portion, 13-gear-box, 14-back cover, 16-inner shell, 17-front portion bearing, 18-
Portion's bearing, 18a-outer ring, 18b-inner ring, 19-cooling fan, 20-labyrinth sealing form component, the chimeric insertion of 20a-bearing
Hole, 20b-contacting wall, 20c-big footpath peripheral part, 20d-path peripheral part, 20e-circumferential slot, 21-emery wheel, 22-safety guard, 28-
Switch, 31-motor, 31a-stator, 31b-rotor, 32-motor reel, 32a-leading section, 32b-rearward end, 33-commutator,
35-brush, 36-fan guard, 38-brush carrier, 40-dust-proof axle ring, 40a-relief portion, 40b-peripheral part, 41-bearing rubber, 52-axle
Hold reception hole, 52a-large-diameter portion, 52b-minor diameter part, 52c-wall, 60-labyrinth sealing formed component, 60a-peripheral part, 60b-dash forward
Shape portion, 71-bearing rubber.
Claims (5)
1. an electric tool, possesses: as the motor in the source of driving；Receive the housing of described motor；Described motor
Motor reel；Described motor reel is carried out the bearing of axle supporting；The labyrinth sealing of the outer ring being assemblied in described bearing is formed
Component；The bearing reception hole that described bearing is supported；The adjacent configuration of component is formed and with described with described labyrinth sealing
Labyrinth sealing forms component cooperation and forms the dust-proof axle ring of labyrinth gap,
Described electric tool is characterised by,
Described labyrinth sealing is formed in component, is formed with elastomer department of assembly at its peripheral part, in described elastomer department of assembly
Being equipped with elastomer, the described bearing being equipped with described labyrinth sealing formation component is bearing in described via described elastomer
In bearing reception hole,
The outer surface of described elastomer connects with the inner peripheral surface of described bearing reception hole, forms component in described labyrinth sealing
It is formed with gap between the inner peripheral surface of outer surface and described bearing reception hole,
The elastic deformation amount of described elastomer is limited by described gap.
2. electric tool as claimed in claim 1, it is characterised in that
Described elastomer department of assembly is formed as circumferential slot.
3. electric tool as claimed in claim 1 or 2, it is characterised in that
Described elastomer is formed as ring-type.
4. electric tool as claimed in claim 1 or 2, it is characterised in that
It is formed with labyrinth gap between the outer peripheral face and the inner peripheral surface of described bearing reception hole of described dust-proof axle ring.
5. electric tool as claimed in claim 3, it is characterised in that
It is formed with labyrinth gap between the outer peripheral face and the inner peripheral surface of described bearing reception hole of described dust-proof axle ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-284779 | 2012-12-27 | ||
| JP2012284779A JP6068134B2 (en) | 2012-12-27 | 2012-12-27 | Electric tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103904809A CN103904809A (en) | 2014-07-02 |
| CN103904809B true CN103904809B (en) | 2016-08-17 |
Family
ID=50996000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310585300.6A Active CN103904809B (en) | 2012-12-27 | 2013-11-19 | Electric tool |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6068134B2 (en) |
| CN (1) | CN103904809B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015210070A1 (en) * | 2015-06-01 | 2016-12-01 | Robert Bosch Gmbh | Hand tool |
| JP6646373B2 (en) * | 2015-07-23 | 2020-02-14 | 京セラインダストリアルツールズ株式会社 | Hand-held power tool |
| CN107914206A (en) * | 2016-10-09 | 2018-04-17 | 苏州宝时得电动工具有限公司 | Brushless angle grinder |
| CN108134470B (en) * | 2018-03-19 | 2023-12-26 | 新誉轨道交通科技有限公司 | Compact traction motor end cover |
| EP3763467A1 (en) * | 2019-07-11 | 2021-01-13 | Hilti Aktiengesellschaft | Dust protection cap with vibration decoupling |
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| WO2004015288A1 (en) * | 2002-08-09 | 2004-02-19 | The Timken Company | Bearing seal |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2014124745A (en) | 2014-07-07 |
| CN103904809A (en) | 2014-07-02 |
| JP6068134B2 (en) | 2017-01-25 |
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Effective date of registration: 20180530 Address after: Hiroshima County Patentee after: KYOCERA Industrial Tools Co., Ltd. Address before: Hiroshima County, Japan Patentee before: Ryobi Ltd. |