CN109571204A - Hand held electric tool - Google Patents
Hand held electric tool Download PDFInfo
- Publication number
- CN109571204A CN109571204A CN201710910671.5A CN201710910671A CN109571204A CN 109571204 A CN109571204 A CN 109571204A CN 201710910671 A CN201710910671 A CN 201710910671A CN 109571204 A CN109571204 A CN 109571204A
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- China
- Prior art keywords
- fan
- flabellum
- wind
- big
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 241000883990 Flabellum Species 0.000 claims abstract description 143
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 241001075561 Fioria Species 0.000 description 13
- 239000002775 capsule Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000005206 flow analysis Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 208000032370 Secondary transmission Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- B24B23/028—Angle tools
-
- 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
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
Abstract
The invention discloses a kind of hand held electric tools, including shell；Motor is equipped with a motor shaft；Fan is mounted on the motor shaft, and the fan is rotated by motor driven；Wind scooper, the fan are arranged in the wind scooper；Wherein, it is formed with wind guiding inlet and wind-guiding outlet in the shell, extraneous air stream is exported via motor-driven fan from the wind guiding inlet via the wind-guiding that motor and fan export to the shell；The fan has size flabellum, wherein the head of the big flabellum is radially, compared to small flabellum head closer to the motor shaft.The fan structure of the hand held electric tool can effectively improve heat dissipation effect.
Description
Technical field
The present invention relates to a kind of electric tools, and in particular to a kind of hand held electric tool.
Background technique
Hand held electric tool, such as angle grinder, also known as grinder or disc mill, a part are cut or are beaten for glass reinforced plastic
Mill；There are also another part for cutting, grinding and brushing metal and stone material etc..
In angle grinder operating process, motor runs at high speed or motor and electronic component long-term work can be in casings
Generate a large amount of heat；The fan being arranged in angle grinder, for leading the heat of motor and electronic component generation out of casing
Out, as fan cannot export in time and effectively heat, it will influence the use of motor and circuit element or even entire angle grinder
Service life.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of hand-helds that can be improved radiating efficiency
Electric tool.
In order to achieve the above objectives, a kind of scheme of the present invention provides a kind of hand held electric tool, including shell, is formed
There is hand-held part；Cartridge device, for installing grinding or cutting sheet；Output shaft, for driving the cartridge device to rotate；Motor,
It is equipped with or is connected with a motor shaft, motor shaft setting substantially vertical with the output shaft；Fan is mounted on the motor
On axis, the fan is rotated by motor driven；Wind scooper, the fan are arranged in the wind scooper；Transmission mechanism is used for
Transmission is realized between the motor shaft and the output shaft；Wherein, the cartridge device be arranged in the shell head and
It is connected to the output shaft, the output shaft is at least partially disposed in the enclosure interior and connect with the transmission mechanism；Its
In, it is formed with wind guiding inlet and wind-guiding outlet in the shell, extraneous air stream enters via motor-driven fan from the wind-guiding
Mouth is exported via the wind-guiding that motor and fan export to the shell；The fan has wafter, and the wafter is equipped with
Several small flabellums are arranged in the runner formed between adjacent two big flabellum in several big flabellums；The head of the big flabellum is along diameter
To direction, compared to small flabellum head closer to the motor shaft.
Further, flabellum air intake vent is formed between the head of the big flabellum and the head of the small flabellum, it is described big
Flabellum air outlet is formed between the tail portion of flabellum and the tail portion of the small flabellum；Wherein, the air stream is in the flabellum inlet air
There is first entrance flow velocity, the air stream has second outlet flow velocity, first entrance stream at the flabellum air outlet at mouthful
Speed is roughly equal with second outlet flow velocity.
Further, the opening formed between the head of described two big flabellums is defined as flabellum air intake vent, one of them is big
The opening that the tail portion of small flabellum between the tail portion of flabellum and two big flabellums is formed is defined as flabellum air outlet, the flabellum inlet air
Mouth is roughly equal with the flabellum air outlet openings of sizes.
Further, the fan has the fan axis hole being mounted on motor shaft, on the fan axis hole of the fan
With fan axis hole wheel hub；The head of the big flabellum is radially 0.5cm apart from the fan axis hole wheel hub, described small
The head of flabellum is radially 1cm apart from fan axis hole wheel hub.
Further, the fan is positioned close to the wind-guiding outlet of the shell；Between the fan and wind scooper
Be arranged water conservancy diversion tag, the water conservancy diversion tag have several flow deflectors extended from fan circumference, several flow deflectors be configured to by
The air stream that fan produces is exported along the wind-guiding export direction of the shell.
Another scheme of the present invention provides a kind of hand held electric tool, including shell, is formed with hand-held part；Motor,
It is equipped with or is connected with a motor shaft；Fan is mounted on the motor shaft, and the fan is rotated by motor driven；Wind-guiding
Cover, the fan are arranged in the wind scooper；Wherein, it is formed with wind guiding inlet and wind-guiding outlet in the shell, it is external empty
Air-flow is exported via motor-driven fan from the wind guiding inlet via the wind-guiding that motor and fan export to the shell；Institute
Fan is stated with wafter, the wafter is equipped with several big flabellums, sets in the runner formed between adjacent two big flabellum
Set several small flabellums；The head of the big flabellum radially, compared to small flabellum head closer to the motor shaft.
Further, flabellum air intake vent is formed between the head of the big flabellum and the head of the small flabellum, it is described big
Flabellum air outlet is formed between the tail portion of flabellum and the tail portion of the small flabellum；Wherein, the air stream is in the flabellum inlet air
There is first entrance flow velocity, the air stream has second outlet flow velocity, first entrance stream at the flabellum air outlet at mouthful
Speed is roughly equal with second outlet flow velocity.
Further, the opening formed between the head of described two big flabellums is defined as flabellum air intake vent, one of them is big
The opening that the tail portion of small flabellum between the tail portion of flabellum and two big flabellums is formed is defined as flabellum air outlet, the flabellum inlet air
Mouth is roughly equal with the flabellum air outlet openings of sizes.
Further, the fan has the fan axis hole being mounted on motor shaft, on the fan axis hole of the fan
With fan axis hole wheel hub；The head of the big flabellum is radially 0.5cm apart from the fan axis hole wheel hub, described
The head of small flabellum is radially 1cm apart from fan axis hole wheel hub.
Further, the fan is positioned close to the wind-guiding outlet of the shell；Between the fan and wind scooper
Be arranged water conservancy diversion tag, the water conservancy diversion tag have several flow deflectors extended from fan circumference, several flow deflectors be configured to by
The air stream that fan produces is exported along the wind-guiding export direction.
The fan structure of above-mentioned hand held electric tool can effectively improve heat dissipation effect.
Detailed description of the invention
Fig. 1 is a kind of perspective view of electric tool of embodiments of the present invention；
Fig. 2 is the plan view of the electric tool in Fig. 1；
Fig. 3 is the partial cutaway view of the electric tool in Fig. 1；
Fig. 4 is the partial sectional view of the electric tool in Fig. 1；
Fig. 5 is the explosive view of the electric tool in Fig. 1；
Fig. 6 is the partial perspective view of the electric tool in Fig. 1；
Fig. 7 is another partial perspective view of the electric tool in Fig. 1；
Fig. 8 is the fan of the electric tool in Fig. 6 and the top view that water conservancy diversion tag is installed together；
Fig. 9 is the fan of the electric tool in Fig. 6 and the side view that water conservancy diversion tag is installed together；
Figure 10 is the fan mold flow analysis figure of the electric tool in Fig. 6.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
A kind of hand held electric tool, angle grinder 100 as depicted in figs. 1 and 2 comprising: shell 10,101 and of switch
Cartridge device 20.As shown in figure 3, the angle grinder 100 further include: output shaft 201, transmission mechanism 40 and motor 50.
In Fig. 2, shell forms the contour structures of angle grinder, also formation hand-held part 12a.The hand-held part 12a exists
Housing outer surface forms the surface that can be held, such as setting increases several convex ribs of frictional force.The shell 10 divides into head
Shell 11 and handle housing 12, wherein the cartridge device 20 is mounted in head capsule 11, shell area where the hand-held part 12a
As handle housing 12, motor 50, circuit board and electronic component are mounted in handle housing 12.
Head capsule 11 is connect with one end of handle housing 12, and head capsule 11 is also used to install output shaft 201, and head capsule 11 is used as shell
A part of body 10, also to external open, for so that output shaft 201 and cartridge device 20 at least partly expose shell 10.
Handle housing 12 can divide into motor room shell and component module shell.In embodiments of the present invention, motor room shell and member
Part cabin shell is integrated, and the two constitutes handle housing 12.For handle housing 12, handle portion 12a may be considered handle
Relatively it is suitable for the part that user holds in hand shell 12.For example, in the present embodiment, handle housing 12 connect with head capsule 11 one
End is coarseer than the other parts of handle housing 12, and the relatively thick part of usual handle housing 12 is not suitable for user's gripping very much, and
The relatively thin part of handle housing 12 is compared to be held suitable for user, and at this moment the relatively thin part can consider handle housing
Being suitable for the part that user holds in 12 is handle portion 12a, and handle portion 12a length, which can consider, at this time is less than handle housing 12
Length；Certainly it is not limited thereto, the entirety of handle housing 12 can also be considered handle portion 12a.For another example, when
When the whole thickness of handle housing 12 is relatively consistent, entirety is suitable for user's gripping, at this moment it is considered that entire handle
Hand shell 12 is handle portion 12a, and at this moment the length of the length with handle housing 12 of handle portion 12a, which can consider, is consistent.
In addition, handle portion 12a can be made with handle housing 12 of same material.Or handle portion 12a and handle housing 12 can be with
It is unlike material, such as handle portion 12a is plastic cement material, and handle housing 12 is plastic material, the two plastic molding；It can also
With handle housing 12 is plastic material, and forms the materials such as plastic cement, rubber on a certain region of handle housing 12, herein simultaneously
It is non-to be limited.
Switch 101 is generally mounted in handle housing 12, in this way, user can conveniently press when holding handle portion 12a
Lower or trigger switch 101, the switch 101 can be set for the main switch of starting angle grinder 100, remaining auxiliary switch in handle
Other regions of hand shell, or can be on the shell other than handle housing 12, facilitate user's special scenes to use.
Power supply is used to power for angle grinder 100, which can be the form of external alternating current；It can certainly be using straight
The form of galvanic electricity, such as can be the detachable battery pack for being bound to shell 10.
Output shaft 201 is used for driving cartridge device 20 connected to it, and cartridge device 20 is for installing grinding or cutting sheet
(not shown).In this way, cartridge device 20 can be driven to rotate synchronously, to drive grinding or cutting when output shaft 201 rotates
Piece rotation, and then workpiece is polished or cut, realize the instrumental function of angle grinder 100.Specifically, output shaft 201
At installation to head capsule 11, output shaft 201 is arranged at least partially in shell 10, some exposes head capsule 11.Work as collet
The installation of device 20 to output shaft 201, cartridge device 20 exposes to outside head capsule 11, so that user be facilitated to dismount grinding or cutting sheet.
In general, shield (not shown) is additionally provided in angle grinder, for protecting user security when angle grinder 100 works,
Shield is installed to head capsule 11.When grinding installation to cartridge device 20, cover portion can be effectively prevent in this way around grinding
Angle grinder in operation clast splash to user, and can also avoid grinding occur accidental damage and be splashed to user and make
The injury of pairs of user.
In the installation to handle housing 12 of motor 50, the motor 50 is equipped with or is connected with a motor shaft 501, driver
Structure 40 is arranged between motor shaft 501 and output shaft 201.When work, motor 50 outputs power to transmission by motor shaft 501
Mechanism 40, transmission mechanism 40 is used to realize transmission between motor shaft 501 and output shaft 201, to drive on output shaft 201
Grinding exports axis rotation around it.
Specifically, the motor shaft 501 of motor 50 substantially extends along the axis direction of motor, the length of the motor shaft 501
Direction may be considered the axis direction of the motor.In an embodiment of the present invention, motor shaft 501 and output shaft 201 substantially hang down
Straight setting；And in some other embodiment of the invention, the motor shaft is arranged substantially in parallel with output shaft, certainly at other
Under some cases, the motor shaft can also be obliquely installed with output shaft.
Transmission mechanism 40, such as may include first bevel gear 401 and second bevel gear 403.First bevel gear 401 is installed
It to motor shaft 501, can be rotated synchronously with motor shaft 501, and the installation of second bevel gear 403 is on output shaft 201, it can be with
Output shaft 201 rotates synchronously, wherein second bevel gear 403 and first bevel gear 401 are intermeshed, to work as 501 turns of motor shaft
When dynamic, first bevel gear 401 drives second bevel gear 403 to rotate, and second bevel gear 403 drives output shaft 201 to rotate synchronously, into
And realize the transmission between motor shaft 501 and output shaft 201.In addition to this, the transmission mechanism 40 can be secondary transmission, or
It more than second level is driven, is not limited herein.
Angle grinder 100 further includes circuit board assemblies, and circuit board is equipped with controller, is driven for controlling motor 50.Its
In, driving switch circuit is also equipped on circuit board, the driving switch circuit includes metal-oxide-semiconductor, and 6 metal-oxide-semiconductors are generally arranged.Electricity
Road plate is arranged in shell 12, and further, circuit board is arranged in handle housing 12.Circuit board can be vertically installed in handle
It in hand shell 12, or is mounted on motor end side, so as to effective and reasonable using space in handle housing, structure simplifies, is compact.
As shown in Figure 4, Figure 5 and Figure 6, angle grinder 100 further includes fan 801, water conservancy diversion tag 803 and wind scooper 805, if
It sets in shell 10.Wind guiding inlet 501 and wind-guiding outlet 503 are formed in the shell 10, outside air flows through motor 50
Driving fan 801, by air stream from the shell wind guiding inlet 501 via circuit board, electronic component, motor 50 and fan
801 export to the wind-guiding outlet 503.
In an embodiment of the present invention, the rear end of wind guiding inlet 501 setting and the shell handle portion 12a, specifically
For, in the tail portion of the shell；And the front end of the shell handle portion 12a is arranged in the wind-guiding outlet 503, i.e., in wind
It fans on 801 front side shells, radiates to export to outside shell air-flow by wind-guiding outlet 503.In addition to this wind-guiding goes out
Mouth 503 is positioned close to except fan 801, and being equipped with unlimited be also used as of 20 part of cartridge device in shell 10 is that another is led
Wind exports 503a.Wind-guiding outlet 503 on the shell close to fan 801 exports for prevailing wind, due to a distance from fan 801
Closely, it is easier to by 801 active drive of fan, most of thermal current by circuit board, electronic component, motor be led from this
Wind-guiding outlet 503 exports to hull outside.
Such as Fig. 3, Fig. 4 and Fig. 6, the fan 801 is aerofoil fan, is mounted on the motor shaft 501, motor 501
Also the fan 801 is driven to rotate when driving.The installation of wind scooper 805 on the housing 10, is connect, institute with shell a part
Motor shaft 501 is stated to pass through from wind scooper side to the other side；The fan 801 is further disposed in wind scooper 805.It is described
Wind scooper 805 opens wide completely with respect to the side of cartridge device 20, and the opposite other side then offers through-hole towards motor 501,
The hole size is arranged so that big flabellum 801a on the wafter and small flabellum 801b are at least partly exposed, in this hair
In bright embodiment, so that the head of big flabellum 801a and small flabellum 801b on the wafter are exposed.
Water conservancy diversion tag 803 is set between the fan 801 and wind scooper 805, when the water conservancy diversion tag 803 is set to
After fan 801, the water conservancy diversion tag 803 has several flow deflector 803a extended from 801 periphery of fan.In other words, institute
It states fan 801 and water conservancy diversion tag 803 is all disposed in wind scooper 805, as described in Fig. 6, the water conservancy diversion with flow deflector 803a is attached
The outer diameter of piece 803 is greater than the outer diameter of the fan 801, and the outer diameter of the wind scooper 805 is greater than the leading with flow deflector 803a
The outer diameter of tag 803 is flowed, after such fan 801 is placed in wind scooper 805, water conservancy diversion tag 803 is just embedded into the fan
Between 801 and wind scooper 805 in clearance space.Moreover, wind scooper 805 opens wide completely with respect to the side of cartridge device 20, towards
The other side of motor 501 be provided with radius be less than completely open wide side through-hole 805a, its only make size fan leaf head exposed,
Air stream after circuit board, electronic component and motor 501 can be imported into fan by the wind scooper 805 constructed in this way
801, the wind-guiding outlet 503 on neighbouring shell is exported to by fan 801；At the same time, wind scooper 805 can be effectively prevented
Line bits, the sundries generated at cartridge device 20 enters inside motor body, influences motor operation.
As shown in Figure 4 and Figure 8, the fan 801 has wafter, and several big flabellums are equipped on the wafter
Several small flabellum 801b are arranged in the runner formed between two big flabellum 801a in 801a, 801b.The fan 801 has peace
Fan axis hole 811 on motor shaft 501 has fan axis hole wheel hub 811a on the fan axis hole 811 of the fan,
The head of the big flabellum 801a is radially 0.5cm, the head of the small flabellum 801b apart from the fan axis hole wheel hub
Portion is radially 1cm apart from fan axis hole wheel hub, and small fan radially, is compared in the head of the big flabellum 801a described in this way
The head of leaf 801b is closer to the motor shaft 501, so that the opening definition formed between the head of two big flabellum 801a
For flabellum air intake vent C, what the tail portion of the small flabellum 801b between the tail portion of one of them big flabellum 801a and two big flabellums was formed
Opening is defined as flabellum air outlet D, and the openings of sizes of the flabellum air intake vent C and the flabellum air outlet D are roughly equal.At this
In inventive embodiments, flabellum air intake vent C openings of sizes be 3.1mm, and flabellum air outlet D openings of sizes be 3.5mm, 3.6mm and
3.8mm etc., this thinks that flabellum air intake vent C and the openings of sizes of the flabellum air outlet D are roughly equal.
In the prior art, the fan leaf is in the same size and interval is arranged, in the flabellum that the tail portion of the fan leaf is formed
Air outlet, it is much bigger compared to the flabellum air intake vent openings of sizes that the head of the fan leaf is formed, in this way due to having just enter into flabellum
Air intake vent opening is smaller, and inlet air flow interference region is formd at flabellum air intake vent, enters the circulation between fan leaf
Channel is exported by flabellum air outlet later, and flabellum air outlet openings of sizes is compared to much bigger, this meeting of flabellum air intake vent opening
Cause air-flow at flabellum air outlet because of airflow reflux or convolution caused by decompression, so as to cause air-flow rotation is formed at flabellum air outlet
Whirlpool i.e. low regime, cause flowed energy to lose, and one side air-flow vortex can cause certain resistance to fan, influence fan
Working efficiency；On the other hand it is unfavorable for thermal current effectively towards 503 discharge of wind-guiding outlet of the shell.The present invention is adjacent
Increase a piece of small flabellum 801b in runner between two big flabellum 801a, the opening that can effectively reduce flabellum air outlet D is big
It is small, so that the air intake vent C of flabellum, air outlet D openings of sizes are roughly equal, so that air outlet D air-flow vortex (low regime)
It disappears, increases fan flow.
In mold flow analysis figure as shown in Figure 10, upper figure is the prior art, and the inlet flow rate at this described flabellum air intake vent is remote
Greater than the exit velocity at flabellum air outlet；In other words, the almost very little of the exit velocity at the flabellum air outlet at this time.The following figure
Implement mold flow analysis figure for the present invention, is learnt by the result that experiment obtains, the air stream has at the flabellum air intake vent C
First entrance flow velocity, and there is second outlet flow velocity at the flabellum air outlet D, first entrance flow velocity and second outlet flow velocity
It is roughly equal.What needs to be explained here is that, with the size of color marking flow velocity, entering in flabellum in actual mold flow analysis figure
Flow velocity color at air port is really unanimous on the whole with the flow velocity color at flabellum air outlet, fails display color herein.In this way,
Air stream enters from flabellum air intake vent C and exports to flabellum air outlet D with substantially constant speed, and flowed energy does not have big damage
It loses.
As described above, water conservancy diversion tag 803 is arranged between the fan 801 and wind scooper 805, when the water conservancy diversion tag
803 are set to after fan 801, and the water conservancy diversion tag 803 has several flow deflector 803a extended from 801 periphery of fan,
Several flow deflector 803a are configured to the air stream for producing fan 801 and export the export of 503 directions along the wind-guiding of the shell.
Specifically, it is regarded from the top view that the water conservancy diversion tag 803 is assembled with fan 801,803 structure of water conservancy diversion tag
It causes, the flow deflector 803a extends along the periphery of wafter, and its root is prolonged since one of them of size fan leaf
It stretches, is spaced a different fan leaf, and its tail portion extends up near another identical fan leaf.That is, described
The head of strong wind flabellum 801a is about radially 0.5cm, big fan apart from the fan axis hole wheel hub 811a, such as A point
Leaf 801a is from its head rearwardly arc-shaped sigmoid, and the tail portion distance of the strong wind flabellum 801a is apart from same A point with respect to it
Head is more on the lower.A small fan leaf 801b is arranged at intervals between two strong wind flabellum 801a, small fan leaf 801b is with class
It is similar to the arc sigmoid of strong wind flabellum 801a, the head of the small fan leaf 801b is radially apart from the fan axis hole
Wheel hub 811a is about 1cm.As shown in figure 8, in the top view that water conservancy diversion tag 803 and fan 801 assemble, the big flabellum
The tangent line of the arc of the tangent line of 801a arc and the flow deflector 803a is arranged at close to 90 degree, on water conservancy diversion tag 803 so
Flow deflector 803a effectively the thermal current that the disorder that fan 801 produces is hovered between fan and wind scooper directly can be led
To 503 discharge of wind-guiding outlet towards the shell, this substantially increases heat dissipation effect.
As shown in figure 9, regard it from the side view that the water conservancy diversion tag 803 is assembled with fan 801, the flow deflector 803a into
One step is configured to, and root is more roomy to be started to extend, and is spaced one of fan leaf, until to boil down into comparison sharp for its tail portion.
Such flow deflector 803a be configured be conducive to by the fan 801 originally around fan tangential direction circulation disorder hot gas
Stream, i.e., along the disorder thermal current between wind scooper 805 and fan 801 in circular passage, by described in flow deflector 803a guiding
The wind-guiding outlet 503 of shell is discharged.
The root of above-mentioned strong wind flabellum 801a and small fan leaf 801b, compared with the prior art for, further from fan axis hole
811 positions, this also indirectly increases the air inlet open area of fan, and blade and air inlet will not be caused to interfere in this way.
The above embodiment of the present invention is illustrated using angle grinder, but the present invention is not limited to angle grinders, in other uses
The fan being mounted on motor shaft is not limited herein.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of hand held electric tool, comprising:
Shell is formed with hand-held part；
Cartridge device, for installing grinding or cutting sheet；
Output shaft, for driving the cartridge device to rotate；
Motor is equipped with or is connected with a motor shaft, motor shaft setting substantially vertical with the output shaft；
Fan is mounted on the motor shaft, and the fan is rotated by motor driven；Wind scooper, the fan are arranged in institute
It states in wind scooper；
Transmission mechanism, for realizing transmission between the motor shaft and the output shaft；
Wherein, the cartridge device is arranged in the head of the shell and is connected to the output shaft, the output shaft at least portion
Set up separately and sets in the enclosure interior and connect with the transmission mechanism；
Wherein, it is formed with wind guiding inlet and wind-guiding outlet in the shell, extraneous air stream is via motor-driven fan, from described
Wind guiding inlet is exported via the wind-guiding that motor and fan export to the shell；
It is characterized by: the fan have wafter, the wafter be equipped with several big flabellums, adjacent two big flabellum it
Between several small flabellums of setting in the runner that is formed；Radially, the head compared to small flabellum is more leaned on the head of the big flabellum
The nearly motor shaft.
2. hand held electric tool according to claim 1, it is characterised in that: the head of the big flabellum and the small fan
Flabellum air intake vent is formed between the head of leaf, and flabellum outlet air is formed between the tail portion of the big flabellum and the tail portion of the small flabellum
Mouthful；Wherein, the air stream has first entrance flow velocity at the flabellum air intake vent, and the air stream is in the flabellum outlet air
There is second outlet flow velocity, first entrance flow velocity and second outlet flow velocity are roughly equal at mouthful.
3. hand held electric tool according to claim 1 or 2, it is characterised in that: between the head of the two big flabellum
The opening of formation is defined as flabellum air intake vent, the tail portion shape of the small flabellum between the tail portion of one of them big flabellum and two big flabellums
At opening be defined as flabellum air outlet, the flabellum air intake vent and the flabellum air outlet openings of sizes are roughly equal.
4. hand held electric tool according to claim 1, it is characterised in that: the fan, which has, to be mounted on motor shaft
Fan axis hole, on the fan axis hole of the fan have fan axis hole wheel hub；The head of the big flabellum is radially
It is 0.5cm apart from the fan axis hole wheel hub, the head of the small flabellum is radially 1cm apart from fan axis hole wheel hub.
5. hand held electric tool according to claim 4, it is characterised in that: the fan is positioned close to the shell
Wind-guiding outlet；Water conservancy diversion tag is set between the fan and wind scooper, and the water conservancy diversion tag has several from fan circumference
The flow deflector extended, several flow deflectors are configured to wind-guiding exporter guide of the air stream for producing fan along the shell
Out.
6. a kind of hand held electric tool, comprising:
Shell is formed with hand-held part；
Motor is equipped with or is connected with a motor shaft；
Fan is mounted on the motor shaft, and the fan is rotated by motor driven；
Wind scooper, the fan are arranged in the wind scooper；
Wherein, it is formed with wind guiding inlet and wind-guiding outlet in the shell, extraneous air stream is via motor-driven fan, from described
Wind guiding inlet is exported via the wind-guiding that motor and fan export to the shell；
It is characterized by: the fan have wafter, the wafter be equipped with several big flabellums, adjacent two big flabellum it
Between several small flabellums of setting in the runner that is formed；Radially, the head compared to small flabellum is more leaned on the head of the big flabellum
The nearly motor shaft.
7. hand held electric tool according to claim 6, it is characterised in that: the head of the big flabellum and the small fan
Flabellum air intake vent is formed between the head of leaf, and flabellum outlet air is formed between the tail portion of the big flabellum and the tail portion of the small flabellum
Mouthful；Wherein, the air stream has first entrance flow velocity at the flabellum air intake vent, and the air stream is in the flabellum outlet air
There is second outlet flow velocity, first entrance flow velocity and second outlet flow velocity are roughly equal at mouthful.
8. hand held electric tool according to claim 6 or 7, it is characterised in that: between the head of the two big flabellum
The opening of formation is defined as flabellum air intake vent, the tail portion shape of the small flabellum between the tail portion of one of them big flabellum and two big flabellums
At opening be defined as flabellum air outlet, the flabellum air intake vent and the flabellum air outlet openings of sizes are roughly equal.
9. hand held electric tool according to claim 6, it is characterised in that: the fan, which has, to be mounted on motor shaft
Fan axis hole, on the fan axis hole of the fan have fan axis hole wheel hub；The head of the big flabellum is radially
It is 0.5cm apart from the fan axis hole wheel hub, the head of the small flabellum is radially 1cm apart from fan axis hole wheel hub.
10. hand held electric tool according to claim 6, it is characterised in that: the fan is positioned close to the shell
The wind-guiding of body exports；Water conservancy diversion tag is set between the fan and wind scooper, and the water conservancy diversion tag has several from fan week
While the flow deflector extended, several flow deflectors are configured to the air stream for producing fan and export along the wind-guiding export direction.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710910671.5A CN109571204A (en) | 2017-09-29 | 2017-09-29 | Hand held electric tool |
| DE202018104460.5U DE202018104460U1 (en) | 2017-09-29 | 2018-08-02 | Electric hand tool |
| US16/116,233 US10836027B2 (en) | 2017-09-29 | 2018-08-29 | Hand-held electric power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710910671.5A CN109571204A (en) | 2017-09-29 | 2017-09-29 | Hand held electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109571204A true CN109571204A (en) | 2019-04-05 |
Family
ID=65918935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710910671.5A Withdrawn CN109571204A (en) | 2017-09-29 | 2017-09-29 | Hand held electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109571204A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110340780A (en) * | 2019-07-01 | 2019-10-18 | 锐奇控股股份有限公司 | Air ducting and angle grinder comprising it |
| CN112008605A (en) * | 2019-05-29 | 2020-12-01 | 罗伯特·博世有限公司 | Cooling device for a hand-held power tool and hand-held power tool |
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| CN102128178A (en) * | 2010-01-16 | 2011-07-20 | 富准精密工业(深圳)有限公司 | Fan blade structure and centrifugal fan with same |
| CN102979761A (en) * | 2011-09-07 | 2013-03-20 | 技嘉科技股份有限公司 | Fan impeller |
| CN105443437A (en) * | 2015-12-01 | 2016-03-30 | 芜湖德鑫汽车部件有限公司 | Automobile fan impeller |
| CN106926097A (en) * | 2015-12-31 | 2017-07-07 | 南京德朔实业有限公司 | Angle grinder |
| CN207508941U (en) * | 2017-09-29 | 2018-06-19 | 南京德朔实业有限公司 | Hand held electric tool |
| CN208759249U (en) * | 2017-09-29 | 2019-04-19 | 南京德朔实业有限公司 | Hand held electric tool |
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2017
- 2017-09-29 CN CN201710910671.5A patent/CN109571204A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128178A (en) * | 2010-01-16 | 2011-07-20 | 富准精密工业(深圳)有限公司 | Fan blade structure and centrifugal fan with same |
| CN102979761A (en) * | 2011-09-07 | 2013-03-20 | 技嘉科技股份有限公司 | Fan impeller |
| CN105443437A (en) * | 2015-12-01 | 2016-03-30 | 芜湖德鑫汽车部件有限公司 | Automobile fan impeller |
| CN106926097A (en) * | 2015-12-31 | 2017-07-07 | 南京德朔实业有限公司 | Angle grinder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112008605A (en) * | 2019-05-29 | 2020-12-01 | 罗伯特·博世有限公司 | Cooling device for a hand-held power tool and hand-held power tool |
| CN110340780A (en) * | 2019-07-01 | 2019-10-18 | 锐奇控股股份有限公司 | Air ducting and angle grinder comprising it |
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| CB02 | Change of applicant information |
Address after: 211106 No. 529, 159, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Applicant after: Nanjing Quanfeng Technology Co.,Ltd. Address before: 211106, No. 159, general road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Applicant before: NANJING CHERVON INDUSTRY Co.,Ltd. |
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190405 |