CN103079772A - Portable power tool with quick brake assembly - Google Patents
Portable power tool with quick brake assembly Download PDFInfo
- Publication number
- CN103079772A CN103079772A CN2010800685390A CN201080068539A CN103079772A CN 103079772 A CN103079772 A CN 103079772A CN 2010800685390 A CN2010800685390 A CN 2010800685390A CN 201080068539 A CN201080068539 A CN 201080068539A CN 103079772 A CN103079772 A CN 103079772A
- Authority
- CN
- China
- Prior art keywords
- cam
- brake
- brake cam
- portable power
- securing supports
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/26—Accessories, e.g. stops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/028—Angle tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A portable power tool comprises a motor (2) having a rotary spindle (6) and a cam brake assembly. The cam brake assembly comprises a brake plate (10) attached to the spindle (6), a brake cam (30) carrying a friction material and formed with at least two cam portions, and a stationary support (50) formed with at least two cam portions at positions corresponding to the cam portions of the brake cam (30). The brake cam (30) is rotatable around the rotation axis of the spindle (6). When the brake cam (30) rotates, by the cam action between the cam portions of the brake cam (30) and the cam portions of the stationary support (50), the brake cam (30) is moved in either of dual directions along the rotation axis of the spindle (6) so that the friction material is moved into contact with the brake plate (10) or away from the brake plate (10).
Description
Technical field
The present invention relates to a kind of portable power tool with improved brake assemblies, this brake assemblies can be at the operation electric tool that stop rapidly behind the electric tool.
Background technology
Portable power tool with rotation output is widely used.Many portable power tools do not have braking function.Usually, behind the operation portable power tool, the operator must hold electric tool a period of time until the main shaft of electric tool stops fully.Then, the operator can down tools.This is consuming time and inconvenient for the operator.In addition, this situation has high injured risk.Specifically, when operator's down tools when the main shaft of instrument still rotates, this instrument may injure other article or personnel.
For processing this problem, some portable power tools are equipped with brake, with the instrument that also stops reposefully fast, give so the higher security of operator and better impression.
In the prior art field, a solution of the instrument that stops is to use electric clipper control brake to provide brake force to electric tool.This electric tool comprises the brake module between motor and power supply, and it is used for providing current limited brake force to motor when power supply separates with motor.Electric clipper control brake has high cost and low reliability.
Another kind of solution is to use mechanical brake, is similar to the brake that adopts in vehicle.Specifically, braked wheel is fixed on the electric machine main shaft of electric tool, and the lever that is coated with simultaneously rubber is suitable for contact and the braked wheel that stops under the effect of the power of Compress Spring.The manipulation of mechanical brake is independent of the operation of motor.In other words, after the operation tool, the operator need to carry out the other action instrument that stops.It is loaded down with trivial details doing like this.
In addition, for example, in order to change the shaft-driven tool heads of acceptor or cutter, sometimes behind operation tool, need the spindle lock of instrument in case spline is moving.Can stop fast after operation although have the conventional electric tool of brake, their main shaft is not locked in correct position in case spline is moving.
Therefore, expect to provide a kind of portable power tool with simple, reliable brake, this brake can also stop the rotation of tool spindle fast reposefully behind the operation electric tool.
Summary of the invention
In view of the problem that exists in the prior art field, the purpose of this invention is to provide a kind of portable power tool with improved quick-acting brake.
For reaching this purpose, on the one hand, the invention provides a kind of portable power tool, it comprises:
Motor, it has rotary main shaft; With
The Cam braking assembly, it comprises:
Be attached to the keep plate on the main shaft,
Brake cam, it has the first surface that carries friction material in the position relative with keep plate and the second surface that is formed with at least two cam portions, and
Securing supports, it is relative and be formed with the surface of at least two cam portions with position corresponding to the cam portion of brake cam that it has a second surface with brake cam,
Wherein, brake cam can be around the pivot axis of main shaft, and
When brake cam rotates, cam wheel between cam portion by brake cam and the cam portion of securing supports, brake cam can move up along the either party of pivot center in both direction of main shaft, thereby friction material moves to and contacts with keep plate or away from keep plate.
According to a preferred embodiment of the present invention, described portable power tool also comprises the fan that is fixed on the main shaft, and wherein, keep plate is installed on the fan, and brake camshaft upwards is arranged between securing supports and the fan.
According to another preferred embodiment of the present invention, described portable power tool also comprises start stop apparatus, and described start stop apparatus is suitable for activateding and discharging, correspondingly to start and to close down motor; Wherein, brake cam is connected with start stop apparatus on kinematics, in order to can be rotated by start stop apparatus, so that: when start stop apparatus activated, brake cam moved towards securing supports, so that friction material and keep plate disengage; With when start stop apparatus is released, brake cam moves away from securing supports, so that friction material and keep plate close contact.
According to another preferred embodiment of the present invention, described Cam braking assembly also comprises back-moving spring, and described back-moving spring is connected between brake cam and the securing supports, and is constructed to apply reset force to brake cam; Wherein, described back-moving spring trends towards making brake cam to rotate along the direction of the direction of rotation that causes with actuation motion by start stop apparatus.
According to another preferred embodiment of the present invention, described Cam braking assembly also comprise be formed on the brake cam/be formed in the brake cam guide structure, described guide structure is used for guiding brake cam to rotate with respect to securing supports when brake cam moves along the pivot center direction under cam wheel.
According to another preferred embodiment of the present invention, the cylindrical protrusion part that described securing supports has cylinder-shaped body and protrudes from cylinder-shaped body, the cam portion of securing supports is formed on the described cylinder-shaped body; Described brake cam has roughly toroidal, and installs around the cylindrical protrusion part of securing supports movably.
According to another preferred embodiment of the present invention, described securing supports carries the rotatably bearing of supports main shaft.
According to another preferred embodiment of the present invention, the cam portion of described brake cam is arranged on the circumferencial direction of brake cam symmetrically; The cam portion of described securing supports is arranged on the circumferencial direction of securing supports symmetrically.
According to another preferred embodiment of the present invention, described guide structure comprises the guiding groove in the leg portion that is formed at brake cam and is formed at guide ridges on the outer periphery surface of cylinder-shaped body of securing supports, and described guiding groove is constructed to be suitable for hold therein guide ridges and can slides along guide ridges.Alternatively, described guide structure comprises the guide ridges on the leg portion that is formed at brake cam and is formed at guiding groove in the outer periphery surface of cylinder-shaped body of securing supports, and guide ridges can be slided in guiding groove.
According to another preferred embodiment of the present invention, described brake cam and described securing supports all have low-lying part between cam portion, and described low-lying part is smooth or recessed.
The invention provides a kind of portable power tool with new Cam braking mechanism, described Cam braking mechanism links with start stop apparatus on kinematics and can automatically be operated by start stop apparatus.Therefore, Cam braking assembly of the present invention is simple and easy operating.
In addition, the cam wheel zone that is used for braking is large, and this has realized steadily, has braked and lock fast and reliably.
Cam brake thought of the present invention can be used on annular saw, angle grinding machine, marble cutting machine and the way of output this type electric tool for rotation.
Description of drawings
Below, will further understand the present invention by reading the detailed description of doing with reference to the accompanying drawings, in the accompanying drawings:
Fig. 1 shows the schematic cross sectional views of the part of portable power tool according to an embodiment of the invention;
Fig. 2 is the front schematic view that the edge direction identical with Fig. 1 of brake cam of Cam braking assembly of the portable power tool of Fig. 1 done;
Fig. 3 is the schematic plan of the brake cam done along the direction shown in the arrow A among Fig. 1;
Fig. 4 is the schematic side elevation of the brake cam done along the direction shown in the arrow B among Fig. 1;
Fig. 5 is the front schematic view that the edge direction identical with Fig. 1 of securing supports of Cam braking assembly of the portable power tool of Fig. 1 done;
Fig. 6 is the schematic plan of the securing supports done along the direction shown in the arrow A among Fig. 1; And
Fig. 7 is the schematic side elevation of the securing supports done along the direction shown in the arrow B among Fig. 1.
The specific embodiment
Now, with reference to Fig. 1 portable power tool according to a preferred embodiment of the present invention is described.
Described portable power tool comprises: the housing (not shown); Motor 2, it is fixedly mounted in the housing, and has the rotary main shaft 6 that limits rotation Z; Fan 4, it is fixed to rotary main shaft 6, thereby can be rotated cooling motor by main shaft; With securing supports 50, it is fixed to housing or forms with housing is whole, and is used for carrying the rotatably bearing 8 of supports main shaft 6.
Described portable power tool also comprises brake assemblies, and described brake assemblies is used for stopping the rotation of main shaft behind the EO of instrument.
Described Cam braking assembly mainly comprises: annular stop plate 10, brake cam 30 and friction material pad 12, wherein, described annular stop plate 10 is installed on the front surface of fan 4 (this surface is motor 2 dorsad), described brake cam 30 is arranged between securing supports 50 and the fan 4, and described friction material pad 12 is being installed on the rear surface of brake cam 30 towards the position of keep plate 10 backward.
Shown in Fig. 2-4, brake cam 30 is with roughly toroidal formation, and it has centre bore and opposite front surface 31a and rear surface 31b.Described front surface 31a is forward towards securing supports 50, and described rear surface 31b is rearwards to fan 4.Rear surface 31b is general planar, and is formed with annular recess 37, to hold therein friction material pad 12.Front surface 31a has than lower part and two cam portion 40(be two at least in described embodiment, but also be feasible more than two), described at least two cam portions 40 are from outstanding forward than lower part, and are arranged in symmetrically on the circumferencial direction of brake cam 30.Each cam portion 40 has respectively apex portion (distance is than the highest part of lower part) 40a and transition portion 40b and 40c, and described transition portion 40b and 40c form glossily in apex portion with between than lower part.Can be flat or recessed portion than lower part.
Shown in Fig. 5-7, securing supports 50 has cylinder-shaped body and cylindrical protrusion part 52.Described main body has the rear surface 51 of annular, and described rear surface 51 is rearwards to the front surface 31a of brake cam 30, and cylindrical protrusion part 52 51 inner periphery protrudes backward from the rear surface.
Projection 52 has the Outer cylindrical periphery surface, and described Outer cylindrical periphery surface is corresponding to the inner surface of the centre bore of brake cam 30.Under the assembled state of as shown in Figure 1 this instrument, projection 52 is embedded in the centre bore of brake cam 30, and brake cam 30 can be rotated along rotation Z bidirectional-movement with around rotation Z.
The rear surface 51 of securing supports 50 has than lower part (flat or recessed portion) and cam portion 60, and described cam portion 60 is from outstanding backward than lower part, and arranges symmetrically on the circumferencial direction of securing supports 50.The number of cam portion 60 equals the number of the cam portion 40 of brake cam 30.Although two cam portions 60 have been shown in described embodiment, also be feasible more than two.Each cam portion 60 has respectively apex portion (distance is than the highest part of lower part) 60a and transition portion 60b and 60c, and described transition portion 60b and 60c form glossily in apex portion with between than lower part.
When brake cam 30 and securing supports 50 are assembled together, be embedded in the situation of the centre bore that passes brake cam 30 at the projection 52 of securing supports 50, the rear surface 51 of securing supports 50 and the front surface 31a of brake cam 30 contact with each other.When brake cam 30 when rotation Z rotates, the cam portion 60 of the cam portion 40 contact securing supports 50 of brake cam 30 and than lower part, and move along the cam portion 60 of securing supports 50 with than lower part so that brake cam 30 towards with move away from securing supports 50.Specifically, when the apex portion 40a of brake cam 30 moving than lower part from its apex portion 60a that faces to securing supports 50, brake cam 30 moves towards securing supports 50 along the direction of the rotation Z shown in the arrow R1 shown in Fig. 1; When apex portion 40a from its securing supports of facing 50 apicad part 60a moves than lower part the time, brake cam 30 moves away from securing supports 50 along the direction of the rotation Z shown in the arrow R2 shown in Fig. 1.
By the cam wheel between above-described brake cam 30 and the securing supports 50, brake cam 30 obtains to move axially.Therefore, by the friction material pad 12 of brake cam 30 carrying correspondingly towards with move away from the keep plate 10 by fan 4 carryings.When friction material pad 12 contact keep plate 10, the rotation of main shaft 6 can be limited, thereby, carry out braking to motor 2.When friction material pad 12 during away from keep plate 10, main shaft can be rotated.
Fig. 1 shows the dead status of this instrument, and wherein, apex portion 40a directly faces and contact apex portion 60a, thereby friction material pad 12 is pushed on the keep plate 10 by brake cam 30.
For realizing that brake cam 30 is with respect to the rotation of securing supports 50, brake cam 30 is provided with and activates bar 35, described actuating bar 35 is at described two cam portion 40(or when the number of cam portion 40 during greater than two, wherein two) place, centre position between is formed on the toric external peripheral surface of brake cam 30, and radially extends from described external peripheral surface.
Activate bar 35 and be formed with recess 36 near its end, be connected with the start stop apparatus 100 of instrument on kinematics, will activate bar 35.Start stop apparatus and and the kinematics that activates between the bar 35 be connected among Fig. 3 schematically illustrated.It will be appreciated by those skilled in the art that described start stop apparatus can have shape and the structure that is fit to arbitrarily, and described start stop apparatus is connected and can sets up by the motion that is fit to arbitrarily with the kinematics that activates between the bar.For example, can use transmission mechanism will activate bar 35 is connected with start stop apparatus, be converted to actuating bar 35 along the movement of the direction shown in the arrow S among Fig. 3 with the actuation motion with start stop apparatus, thereby brake cam 30 is rotated around rotation Z along the direction shown in the arrow S1 among Fig. 3, and this has realized making brake cam 30 to move towards securing supports 50 along the direction shown in the arrow R1 among Fig. 1.
Activate bar 35 and also be formed with all-in-one-piece leg portion 32, described leg portion 32 is extended forward from the front surface that activates bar.Leg portion 32 is formed with guiding groove 33 and is connected end 34, and wherein, described guiding groove 33 is towards the external peripheral surface of the main body of securing supports 50, and described connection end 34 is used for connecting the end of the back-moving spring that the following describes.
On the external peripheral surface of the main body of securing supports 50, be formed with guide ridges 16 in the position with guiding groove 33 engagements along a track, when brake cam 30 rotated under by means of the cam wheel of actuating bar 35 between brake cam 30 and securing supports 50 that is activated by start stop apparatus, described track was corresponding to the mobile route of guiding groove 33.
Above-mentioned guide ridges and guiding groove can be arranged in the mode of putting upside down.That is to say that leg portion 32 can be formed with guide ridges, described guide ridges can be slided in the guiding groove in being formed at securing supports 50.
Back-moving spring 18 is used to brake cam 30 is pulled to its initial position shown in Fig. 1.Described back-moving spring is the draft helical spring with two ends, wherein, end is connected to the connection end 34 on the leg portion 32 that is formed at brake cam 30, and another end is connected to attaching parts 55, and described attaching parts 55 are formed on the external peripheral surface of main body of securing supports 50.Leg portion 32 to brake cam 30 under back-moving spring 18 normalities applies restoring force, and described restoring force trends towards along the pulling of the direction shown in the arrow S2 among Fig. 3 and Fig. 6 brake cam 30, the opposite direction shown in the direction shown in the described arrow S2 and the arrow S1.
When start stop apparatus was released, under the pulling force effect of back-moving spring 18, brake cam 30 rotated around rotation Z along the direction shown in the arrow S2, and this has realized making brake cam 30 to move away from securing supports 50 along the direction shown in the arrow R2 among Fig. 1.Friction material pad 12 by brake cam 30 carryings moves and contacts keep plate 10 to the keep plate 10 by fan 4 carryings, thereby carries out braking to motor 2.
Be understandable that, although be formed with corresponding transition portion 40b and 40c(on the opposite both sides of each apex portion 40a and be formed with corresponding transition portion 60b and 60c on the opposite both sides of each apex portion 60a), only work in one of them cam wheel between brake cam 30 and securing supports 50.Specifically, only have the transition portion 40b shown in Fig. 3 and Fig. 6 and transition portion 60b in cam wheel, to engage one another, and transition portion 40c and transition portion 60c are not touched in cam wheel.
The anglec of rotation of brake cam 30 is set as: allow each apex portion 40a from directly towards the position of apex portion 60a of correspondence, along the transition portion 60b of correspondence, move to the position than the lower part contact with corresponding securing supports 50.Therefore, for as shown in Figure 3 the transition portion 40b with radian α with have as shown in Figure 6 the transition portion 60b of radian β, guide ridges 16 can be extended a radian around rotation Z, and described radian is equal to or slightly greater than one larger among radian α and the β.
According to above-mentioned portable power tool, when this instrument was in dead status, brake cam 30 was positioned at the position with respect to securing supports 50 shown in Fig. 1, that is, apex portion 40a is directly towards apex portion 60a and with it contact.Therefore, friction material pad 12 contact keep plates 10 are with the rotation of restriction main shaft 6.
When the operator came operation tool by activating start stop apparatus, start stop apparatus activated bar 35 along the pulling of the direction shown in the arrow S, and therefore, brake cam 30 rotates along the direction shown in the arrow S1.Therefore, brake cam 30 moves to securing supports 50 under above-mentioned cam wheel, and friction material pad 12 moves away from keep plate 10; Therefore, brake cam 30 discharges main shaft 6 and allows the main shaft rotation.By activating the moment of bar 35, back-moving spring is stretched by leg portion 32.
When the EO of instrument maybe should stop, the operator discharged start stop apparatus.Therefore, the supply of electric power of motor is disconnected.Under the pulling force effect of back-moving spring 18, brake cam 30 rotates along the direction shown in the arrow S2, so brake cam 30 moves away from securing supports 50 under above-mentioned cam wheel, and friction material pad 12 moves and with it contact to keep plate 10; Therefore, brake cam 30 is carried out braking with the rotation of restriction main shaft to main shaft 6.
Can find out that basic thought of the present invention is, for portable power tool provides the Cam braking assembly.This Cam braking assembly is connected with start stop apparatus, and is automatically operated by start stop apparatus, thereby when start stop apparatus was activated, the Cam braking assembly discharged main shaft, and when start stop apparatus is released, main shaft was carried out braking.Any structure that can consist of the Cam braking assembly with above function all falls within the scope of the present invention.
Although described some embodiment, these embodiment only provide as example, therefore are not intended to limit the scope of the invention.The claim of enclosing and their the replacement intention that is equal to comprise all modifications, replacement and the change that falls in the scope and spirit of the present invention.
Claims (12)
1. portable power tool comprises:
Motor, it has rotary main shaft; With
The Cam braking assembly, it comprises:
Be attached to the keep plate on the main shaft,
Brake cam, it has the first surface that carries friction material in the position relative with keep plate and the second surface that is formed with at least two cam portions, and
Securing supports, it is relative and be formed with the surface of at least two cam portions with position corresponding to the cam portion of brake cam that it has a second surface with brake cam,
Wherein, brake cam can be around the pivot axis of main shaft, and
When brake cam rotates, cam wheel between cam portion by brake cam and the cam portion of securing supports, brake cam can move up along the either party of pivot center in both direction of main shaft, thereby friction material moves to and contacts with keep plate or away from keep plate.
2. portable power tool as claimed in claim 1 is characterized in that, described portable power tool also comprises the fan that is fixed on the main shaft, and wherein, keep plate is installed on the fan, and brake camshaft upwards is arranged between securing supports and the fan.
3. portable power tool as claimed in claim 1 or 2 is characterized in that, described portable power tool also comprises start stop apparatus, and described start stop apparatus is suitable for activateding and discharging, correspondingly to start and to close down motor;
Wherein, brake cam is connected with start stop apparatus on kinematics, in order to can be rotated by start stop apparatus, so that:
When start stop apparatus activated, brake cam moved towards securing supports, so that friction material and keep plate disengage; With
When start stop apparatus was released, brake cam moved away from securing supports, so that friction material and keep plate close contact.
4. portable power tool as claimed in claim 3 is characterized in that, described Cam braking assembly also comprises back-moving spring, and described back-moving spring is connected between brake cam and the securing supports, and is constructed to apply reset force to brake cam; With
Wherein, described back-moving spring trends towards making brake cam to rotate along the direction of the direction of rotation that causes with actuation motion by start stop apparatus.
5. such as claim 3 or 4 described portable power tools, it is characterized in that, described Cam braking assembly also comprise be formed on the brake cam/be formed in the brake cam guide structure, described guide structure is used for guiding brake cam to rotate with respect to securing supports when brake cam moves along the pivot center direction under cam wheel.
6. portable power tool as claimed in claim 5 is characterized in that, the cylindrical protrusion part that described securing supports has cylinder-shaped body and protrudes from cylinder-shaped body, and the cam portion of securing supports is formed on the described cylinder-shaped body; With
Wherein, described brake cam has roughly toroidal, and installs around the cylindrical protrusion part of securing supports movably.
7. portable power tool as claimed in claim 6 is characterized in that, described securing supports carries the rotatably bearing of supports main shaft.
8. portable power tool as claimed in claim 6 is characterized in that, the cam portion of described brake cam is arranged on the circumferencial direction of brake cam symmetrically; With
Wherein, the cam portion of described securing supports is arranged on the circumferencial direction of securing supports symmetrically.
9. portable power tool as claimed in claim 6, it is characterized in that, described guide structure comprises the guiding groove in the leg portion that is formed at brake cam and is formed at guide ridges on the outer periphery surface of cylinder-shaped body of securing supports, and described guiding groove is constructed to be suitable for hold therein guide ridges and can slides along guide ridges.
10. portable power tool as claimed in claim 6, it is characterized in that, described guide structure comprises the guide ridges on the leg portion that is formed at brake cam and is formed at guiding groove in the outer periphery surface of cylinder-shaped body of securing supports, and guide ridges can be slided in guiding groove.
11., it is characterized in that described brake cam and described securing supports all have low-lying part such as arbitrary described portable power tool among the claim 1-10 between cam portion, described low-lying part is smooth or recessed.
12., it is characterized in that portable power tool is annular saw, angle grinding machine or marble cutting machine such as arbitrary described portable power tool among the claim 1-11.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2010/075890 WO2012019344A1 (en) | 2010-08-11 | 2010-08-11 | Portable power tool with quick brake assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103079772A true CN103079772A (en) | 2013-05-01 |
| CN103079772B CN103079772B (en) | 2015-08-05 |
Family
ID=45567272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080068539.0A Expired - Fee Related CN103079772B (en) | 2010-08-11 | 2010-08-11 | There is the portable power tool of fast braking assembly |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103079772B (en) |
| DE (1) | DE112010005799T5 (en) |
| WO (1) | WO2012019344A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769976A (en) * | 2017-06-23 | 2020-02-07 | 株式会社牧田 | Working tool |
| CN115768610A (en) * | 2020-07-01 | 2023-03-07 | 费斯托工具有限责任公司 | Safety brake for circular saw blade, circular saw including the safety brake, and method of operating the circular saw |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0136282A2 (en) * | 1983-08-31 | 1985-04-03 | AUSTRIA Antriebstechnik G. Bauknecht Aktiengesellschaft | Device for braking electric motors |
| DE4239559A1 (en) * | 1992-11-25 | 1994-05-26 | Festo Kg | Portable power tool, e.g. circular saw, with spindle lock for tool changing - has socket spanner with spigot that passes through bore of clamping screw and spindle and automatically locks spindle by entering locking hole on pitch circle of motor cooling fan |
| CN1218734A (en) * | 1997-12-02 | 1999-06-09 | 星蒂拉公开股份有限公司 | Shaft braker |
| CN2342918Y (en) * | 1998-11-20 | 1999-10-13 | 钟李杏枝 | Electric tool spindle locking device |
| EP0967374A2 (en) * | 1998-06-26 | 1999-12-29 | Honda Giken Kogyo Kabushiki Kaisha | Operation-control lever unit for engine-powered working machine |
| CN2574292Y (en) * | 2002-10-24 | 2003-09-17 | 温岭市五龙电机厂 | Braking device for motor |
| CN2767056Y (en) * | 2004-10-22 | 2006-03-29 | 江苏省苏美达五金工具有限公司 | Electric tool for sanding or polishing |
| CN2850118Y (en) * | 2005-11-25 | 2006-12-20 | 常熟市美益电磁控制元件有限公司 | Electromagnetic brake |
| CN200981801Y (en) * | 2006-08-17 | 2007-11-28 | 曹国祥 | Electric winch plane brake apparatus |
-
2010
- 2010-08-11 DE DE112010005799T patent/DE112010005799T5/en not_active Ceased
- 2010-08-11 CN CN201080068539.0A patent/CN103079772B/en not_active Expired - Fee Related
- 2010-08-11 WO PCT/CN2010/075890 patent/WO2012019344A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0136282A2 (en) * | 1983-08-31 | 1985-04-03 | AUSTRIA Antriebstechnik G. Bauknecht Aktiengesellschaft | Device for braking electric motors |
| DE4239559A1 (en) * | 1992-11-25 | 1994-05-26 | Festo Kg | Portable power tool, e.g. circular saw, with spindle lock for tool changing - has socket spanner with spigot that passes through bore of clamping screw and spindle and automatically locks spindle by entering locking hole on pitch circle of motor cooling fan |
| CN1218734A (en) * | 1997-12-02 | 1999-06-09 | 星蒂拉公开股份有限公司 | Shaft braker |
| EP0967374A2 (en) * | 1998-06-26 | 1999-12-29 | Honda Giken Kogyo Kabushiki Kaisha | Operation-control lever unit for engine-powered working machine |
| CN2342918Y (en) * | 1998-11-20 | 1999-10-13 | 钟李杏枝 | Electric tool spindle locking device |
| CN2574292Y (en) * | 2002-10-24 | 2003-09-17 | 温岭市五龙电机厂 | Braking device for motor |
| CN2767056Y (en) * | 2004-10-22 | 2006-03-29 | 江苏省苏美达五金工具有限公司 | Electric tool for sanding or polishing |
| CN2850118Y (en) * | 2005-11-25 | 2006-12-20 | 常熟市美益电磁控制元件有限公司 | Electromagnetic brake |
| CN200981801Y (en) * | 2006-08-17 | 2007-11-28 | 曹国祥 | Electric winch plane brake apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769976A (en) * | 2017-06-23 | 2020-02-07 | 株式会社牧田 | Working tool |
| US11590626B2 (en) | 2017-06-23 | 2023-02-28 | Makita Corporation | Work tool |
| CN115768610A (en) * | 2020-07-01 | 2023-03-07 | 费斯托工具有限责任公司 | Safety brake for circular saw blade, circular saw including the safety brake, and method of operating the circular saw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103079772B (en) | 2015-08-05 |
| WO2012019344A1 (en) | 2012-02-16 |
| DE112010005799T5 (en) | 2013-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103068530B (en) | There is the portable power tool of the brake assemblies of improvement | |
| US10144110B2 (en) | Work tool | |
| CN104742096B (en) | Power working machine | |
| CN101490635B (en) | Control knob with safety feature | |
| US7128641B1 (en) | Grinder capable of seizing rotary shaft | |
| CN201711848U (en) | Motive power tool | |
| CN102886729A (en) | Electric power tool | |
| US8657032B2 (en) | Electric tool | |
| KR101226037B1 (en) | Electrical clamping apparatus having manual release clutch | |
| US20140026367A1 (en) | Caster device with a directional mechanism | |
| US8596427B2 (en) | Installment structure for braking mechanism in power tool | |
| US9339927B2 (en) | Accessory clamping mechanism and power tool having the same | |
| US9649772B2 (en) | Rotary electric shaver | |
| JP5323830B2 (en) | Brake caliper parking device | |
| CN103079772A (en) | Portable power tool with quick brake assembly | |
| JP5222854B2 (en) | Cutting machine | |
| CN103252759A (en) | Hand-held tool equipment | |
| CN210115785U (en) | Angle grinder | |
| US7544116B1 (en) | Grinder with easily replacing grinding tool | |
| CN113165138B (en) | Working machine | |
| CN101524991B (en) | Vehicle disk brake | |
| CN113646145A (en) | Tool apparatus and method | |
| JP5623905B2 (en) | Brake caliper parking device, brake caliper and disc brake | |
| KR20100052071A (en) | Disc brake for vehicle | |
| CN112548791B (en) | Grinding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |