CN107471044A - Hand held electric tool - Google Patents
Hand held electric tool Download PDFInfo
- Publication number
- CN107471044A CN107471044A CN201610754467.4A CN201610754467A CN107471044A CN 107471044 A CN107471044 A CN 107471044A CN 201610754467 A CN201610754467 A CN 201610754467A CN 107471044 A CN107471044 A CN 107471044A
- Authority
- CN
- China
- Prior art keywords
- hand held
- motor
- electric tool
- held electric
- flange part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
-
- 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
- B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
-
- 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
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
-
- 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/04—Protective covers for the grinding wheel
- B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
- B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
Abstract
The invention discloses a kind of hand held electric tool, including：Output shaft, for fixing polishing pad；Motor, including for driving the drive shaft of output shaft rotation；Transmission mechanism, connect drive shaft and output shaft；Housing, for fixing motor；Brake apparatus, for braking motor；Wherein, transmission mechanism is arranged at one end of drive shaft, and brake apparatus is arranged at the other end of drive shaft.Hand held electric tool disclosed by the invention, can fast braking prevent polishing pad from being damaged to human body.
Description
Technical field
The present invention relates to a kind of hand held electric tool, and in particular to a kind of hand electric work with brake apparatus
Tool.
Background technology
Power tool includes motor.Motor is used for working accessory and performs instrumental function.When being located at power source using motor,
Power tool is referred to as hand held electric tool.
Angle mill is a kind of hand held electric tool, and polishing pad is a kind of working accessory of angle mill, is usually used in cutting and polishes.
In user's closing or release-push, polishing pad needs quickly to be stopped to prevent human body false touch from damaging.
The content of the invention
To solve the deficiencies in the prior art, it is an object of the invention to provide a kind of hand electric for being capable of fast braking
Instrument.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that：
A kind of hand held electric tool, including：Output shaft, for fixing polishing pad；Motor, including for driving output shaft rotation
Drive shaft；Transmission mechanism, connect drive shaft and output shaft；Housing, for fixing motor；Brake apparatus, for braking electricity
Machine；Wherein, transmission mechanism is arranged at one end of drive shaft, and brake apparatus is arranged at the other end of drive shaft.
Further, brake apparatus includes：Electromagnet, it is in brake apparatus when motor is in "on" position and closes shape
State.
Further, hand held electric tool, in addition to：Operation switch, for starting or closing motor；Operation switch is touched
During hair, motor and electromagnet are powered.
Further, brake apparatus also includes：Flange part, it is fixed to the end of drive shaft；Brake assemblies, are used for and flange
Part contacts braking motor；The active force for making brake assemblies be separated with flange part is applied to brake assemblies when electromagnet is powered.
Further, brake apparatus also includes：Elastic component, brake assemblies, which are applied, makes what brake assemblies contacted with flange part
Active force；When electromagnet powers off, elastic component makes brake assemblies contact braking motor with flange part.
Further, brake apparatus also includes：Guide pillar, for being oriented to motion of the brake assemblies relative to flange part；Braking
Component relative to flange part the direction of motion parallel to drive shaft pivot center.
Further, brake assemblies include：Friction member, with flange part friction catch motor；Support member, for fixed friction
Part；Support member can be attracted by electromagnet to separate friction member and flange part.
Further, flange part is formed with the braking surface coordinated with friction member；Rotary shaft of the braking surface perpendicular to drive shaft
Line.
Further, hand held electric tool, in addition to：Handle, gripped for user；Brake apparatus is arranged at handle and electricity
Between machine.
Further, fan, for cooling down motor；Fan and brake apparatus are respectively arranged at the both ends of drive shaft.
Further, casing is formed with air inlet and air outlet；Fan-forced air flows flow through air inlet, braking dress successively
Put, fan and air outlet.
The present invention is advantageous in that the position of brake apparatus is effectively utilized the space of enclosure interior, complete machine is reduced
Size；Simultaneous brake directly act on drive shaft can fast braking avoid danger.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the hand held electric tool as embodiment；
Fig. 2 is the schematic diagram at another visual angle of hand held electric tool in Fig. 1；
Fig. 3 is the plan of hand held electric tool in Fig. 1；
Fig. 4 is the sectional view of hand held electric tool in Fig. 1；
Fig. 5 is the explosive view of hand held electric tool in Fig. 1；
Fig. 6 is the partial enlarged drawing of hand held electric tool in Fig. 4；
Fig. 7 is the schematic diagram that the flange part of hand held electric tool contacts with friction member in Fig. 4；
Fig. 8 is the partial enlarged drawing of structure in Fig. 6.
Embodiment
As shown in Figures 1 to 4, a kind of hand held electric tool 100, including：Polishing pad 10, shield 20, output shaft 30, electricity
Machine 40, handle 50, transmission mechanism 60, housing 70 and brake apparatus 80.Specifically, the hand held electric tool 100 grinds for angle.
Polishing pad 10, for realizing the instrumental function for example polished or cut.Shield 20 at least partly covers polishing pad 10
Realize safeguard function.Hand held electric tool 100 also includes fast clamp mechanism 21, and fast clamp mechanism 21 is used for Fast Installation or dismounting shield
Cover 20, it can be used for adjusting the position of shield 20.Output shaft 30 is used to install or fixed polishing pad 10.The driving output of motor 40
Axle 30 rotates.Motor 40 includes drive shaft 41, rotor 42 and stator 43.Rotor 42 rotates relative to stator 43.Drive shaft 41
It is properly termed as motor shaft.Transmission mechanism 60 is used to connect output shaft 30 and drive shaft 41, and the driving force of drive shaft 41 is transferred to
Output shaft 30.Housing 70 is used to install or fixed motor 40.Handle 50 grips for user.Handle 50 can be as independent part
It can also be formed by housing 70.Housing 70 includes head capsule 71 and casing 72.Motor 40 is fixed to casing 72.Head capsule 71 is used to install
Transmission mechanism 60.Transmission mechanism 60 includes：First gear 61 and second gear 62.First gear 61 is connected to drive shaft 41, the
Two gears 62 are connected to output shaft 30.First gear 61 and second gear 62 engage, so that drive shaft 41 drives output shaft 30
Rotate.Pivot center of the pivot center of drive shaft 41 perpendicular to output shaft 30.Head capsule 71 is formed with for installing auxiliary handle
Mounting hole 711a, 711b, 711c.Multiple mounting hole 711a, 711b, 711c are arranged on the diverse location of head capsule 71, to adapt to
The demand of different operating modes or different user.
Motor 40 can be by DC powered, can also be by exchange electric drive.Namely motor 40 can be direct current
Machine can also be alternating current generator.Hand held electric tool 100 also includes Operation switch 51 and is used to start or close motor 40.Work as behaviour
Motor 40 starts when making the triggering of switch 51, and when Operation switch 51 is released, motor 40 is closed.Operation switch 51 is arranged at handle
50.It is that motor 40 accesses power supply that hand held electric tool 100, which also includes power line 90,.As other embodiment, can also use
Internal combustion engine using fuel combustion as power substitutes the motor 40 using electric power as power.Specifically, hand held electric tool 100
Power is less than 3000w more than 2000w.
Brake apparatus 80 is used for braking motor 40.Motor 40 can be made quickly to stop.Transmission mechanism 60 is arranged at drive shaft
41 one end, brake apparatus 80 are arranged at the other end of drive shaft 41.Brake apparatus 80 is arranged between handle 50 and motor 40.
The position of brake apparatus 80 can effectively utilize the space inside housing 70, reduce the size of complete machine.Simultaneous brake 80 is straight
Connecing effect being capable of fast braking with drive shaft 41.Making user, brake apparatus 80 makes electricity when needing to stop the rotation of grinding disc 10
Machine 40 stops in a short period of time, avoids the generation of danger.
Fan 75 is used to cool down motor 40.Fan 75 and brake apparatus 80 are respectively arranged at the both ends of drive shaft 41.Casing
72 formed with air inlet 73 and air outlet 74.The certain driving air-flow of fan 75 flows through air inlet 73, brake apparatus 80, the and of fan 75 successively
Air outlet 74.Air-flow caused by fan 75 can not only be cooled down to motor 40, additionally it is possible to which brake apparatus 80 is cooled down.
As shown in Figures 4 to 7, brake apparatus 80 includes electromagnet 81, elastic component 82, flange part 83 and brake assemblies 84.
When Operation switch 51 is triggered, motor 40 and electromagnet 81 are powered, i.e., motor 40 is in "on" position, electromagnet
81 are in "on" position, and now brake apparatus 80 is in shutoff device, i.e., non-brake device 80.When user discharges Operation switch
51, motor 40 is closed, and now electromagnet 81 is closed brake apparatus 80 and is in on-position so that motor 40 quickly stops.
Specifically, flange part 83 is arranged at the end of drive shaft 41.Flange part 83 is arranged at drive shaft 41 away from transmission
The end of one end of mechanism 60.Flange part 83 is fixed to the end of drive shaft 41.Brake assemblies 84 are used to contact with flange part 83
So as to braking motor 40.
Elastic component 82 applies the active force for making brake assemblies 84 be contacted with flange part 83 to brake assemblies 84.In electromagnet 81
When being not powered on, or when electromagnet 81 powers off, elastic component 82, which oppresses brake assemblies 84, makes brake assemblies 84 be contacted with flange part 83
So as to prevent the rotation of drive shaft 41.Specifically, elastic component 82 is spring.
Electromagnet 81 can apply the active force for making brake assemblies 84 be separated with flange part 83 when being powered to brake assemblies 84.
I.e. electromagnet 81 is opposite with the force direction that elastic component 82 applies to brake assemblies 84 to the active force that brake assemblies 84 apply.
When electromagnet 81 powers off, brake assemblies 84 are moved so that rubbing in the presence of elastic component 82 to flange part 83
Part 841 contacts with braking surface 831, drive shaft 41 is quickly stopped.
High-abrasive material is could be arranged to as a kind of optional embodiment brake assemblies 84.As a kind of specific implementation
Mode, brake assemblies 84 include friction member 841 and support member 842.Friction member 841 and the friction catch motor 40 of flange part 83, branch
Support member 842 is used for fixed friction part 841.Friction member 841 is made up of high-abrasive material.Specifically, flange part 83 is formed with rubbing
Wipe the braking surface 831 that part 841 coordinates.Pivot center of the braking surface 831 perpendicular to drive shaft 41.Support member 842 is by metal material
It is made, specifically, support member 842 can be attracted by electromagnet 81 to separate friction member 841 and flange part 83.Brake apparatus 80 is also
Including guide pillar 85.Guide pillar 85 is used to be oriented to motion of the brake assemblies 84 relative to flange part 83.Brake assemblies 84 are relative to flange
Pivot center of the direction of motion of part 83 parallel to drive shaft 41.Guide pillar 85 is fixed to housing 70.Support member 842 is formed with leading
The breach 843 that post 85 coordinates.
Fig. 6 is Fig. 4 partial enlarged drawing, and the state shown in Fig. 6 is that electromagnet 81 is in "on" position.Now electromagnet 81
Attraction be more than elastic component 82 elastic force, that is to say, that electromagnet 81 overcome elastic component 82 elastic force attract support member 841 to
Right motion.Flange part 83 is driven to be separated with friction member 841.As shown in figure 8, between maximum between friction member 841 and flange part 83
Gap L1 is less than or equal to 5mm more than or equal to 0.1mm.Further, L1 is less than or equal to 2mm more than or equal to 0.1mm.Further, L1
It is less than or equal to 1mm more than or equal to 0.1mm.Further, L1 is less than or equal to 0.5mm more than or equal to 0.1mm.Further, L1 is big
In being less than or equal to 0.3mm equal to 0.1mm.When L1 sizes are set so that motor 40 starts, friction member 741 can be fast with flange part 83
Speed separation.When motor 40 turns off simultaneously, friction member 741 can be combined quickly with flange part 83, friction catch.
State shown in Fig. 7 is closed for electromagnet 81, and now electromagnet 81 is small without suction or its suction
In the active force of elastic component 82.When electromagnet 81 is closed, support member 841 moves to friction member to the left in the presence of elastic component 82
841 contact with flange part 83, are quickly stopped by the frictional force drive shaft 41 between friction member 841 and flange part 83.This
When guide pillar 85 be not directed only to the motion of support member 842, and the torsion of drive shaft 41 is transferred to support member by friction member 741
842.Guide pillar 85 prevents the rotation of support member 842.Alternatively, extra locating part can also be set to be used to hinder
The only rotation of support member 842.
As another embodiment, brake apparatus can also be not provided with elastic component.Pass through magnet control brake assemblies
Relative to the position of flange part.Contact is kept to be braked by the active force brake assemblies and flange part of electromagnet.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way for above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical scheme, all fall within protection scope of the present invention.
Claims (11)
1. a kind of hand held electric tool, including：
Output shaft, for fixing polishing pad；
Motor, including for driving the drive shaft of the output shaft rotation；
Transmission mechanism, connect the drive shaft and the output shaft；
Housing, for fixing the motor；
Brake apparatus, for braking the motor；
Wherein,
The transmission mechanism is arranged at one end of the drive shaft, and the brake apparatus is arranged at the other end of the drive shaft.
2. hand held electric tool according to claim 1, it is characterised in that：
The brake apparatus includes：
Electromagnet, it is closed the brake apparatus when the motor is in "on" position.
3. hand held electric tool according to claim 2, it is characterised in that：
The hand held electric tool, in addition to：
Operation switch, for starting or closing the motor；
During the Operation switch triggering, the motor and the electromagnet are powered.
4. hand held electric tool according to claim 1, it is characterised in that：
The brake apparatus also includes：
Flange part, it is fixed to the end of the drive shaft；
Brake assemblies, for contacting the braking motor with the flange part；
The active force for making the brake assemblies be separated with the flange part is applied to the brake assemblies when electromagnet is powered.
5. hand held electric tool according to claim 4, it is characterised in that：
The brake apparatus also includes：
Elastic component, the active force for making the brake assemblies be contacted with the flange part is applied to the brake assemblies；
When the electromagnet powers off, the elastic component makes the brake assemblies contact the braking motor with the flange part.
6. hand held electric tool according to claim 4, it is characterised in that：
The brake apparatus also includes：
Guide pillar, for being oriented to motion of the brake assemblies relative to the flange part；
The brake assemblies relative to the flange part the direction of motion parallel to the drive shaft pivot center.
7. hand held electric tool according to claim 4, it is characterised in that：
The brake assemblies include：
Friction member, with motor described in the flange part friction catch；
Support member, for fixing the friction member；
The support member can be attracted by the electromagnet to separate the friction member and the flange part.
8. hand held electric tool according to claim 7, it is characterised in that：
The flange part is formed with the braking surface coordinated with the friction member；
Pivot center of the braking surface perpendicular to the drive shaft.
9. hand held electric tool according to claim 1, it is characterised in that：
The hand held electric tool, in addition to：
Handle, gripped for user；
The brake apparatus is arranged between the handle and the motor.
10. hand held electric tool according to claim 1, it is characterised in that：
Fan, for cooling down the motor；
The fan and the brake apparatus are respectively arranged at the both ends of the drive shaft.
11. hand held electric tool according to claim 10, it is characterised in that：
The casing is formed with air inlet and air outlet；
The fan-forced air flows flow through the air inlet, the brake apparatus, the fan and the air outlet successively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016104043490 | 2016-06-08 | ||
| CN201610404349 | 2016-06-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107471044A true CN107471044A (en) | 2017-12-15 |
Family
ID=60594132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610754467.4A Pending CN107471044A (en) | 2016-06-08 | 2016-08-29 | Hand held electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107471044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262419A (en) * | 2018-11-09 | 2019-01-25 | 湖北理工学院 | It is a kind of for cutting the semi-automatic angle grinder of metal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584354A (en) * | 2004-05-31 | 2005-02-23 | 常州合力电器有限公司 | Electromagnetic brake for blade electric tool |
| EP2366492A1 (en) * | 2010-03-19 | 2011-09-21 | Festool GmbH | Manually operated machine tool with a radial brake |
| CN102689293A (en) * | 2011-03-23 | 2012-09-26 | 株式会社牧田 | Power tool |
| CN102886729A (en) * | 2011-07-22 | 2013-01-23 | 株式会社牧田 | Electric power tool |
-
2016
- 2016-08-29 CN CN201610754467.4A patent/CN107471044A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584354A (en) * | 2004-05-31 | 2005-02-23 | 常州合力电器有限公司 | Electromagnetic brake for blade electric tool |
| EP2366492A1 (en) * | 2010-03-19 | 2011-09-21 | Festool GmbH | Manually operated machine tool with a radial brake |
| CN102689293A (en) * | 2011-03-23 | 2012-09-26 | 株式会社牧田 | Power tool |
| CN102886729A (en) * | 2011-07-22 | 2013-01-23 | 株式会社牧田 | Electric power tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262419A (en) * | 2018-11-09 | 2019-01-25 | 湖北理工学院 | It is a kind of for cutting the semi-automatic angle grinder of metal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171215 |
|
| RJ01 | Rejection of invention patent application after publication |