CN1676282A - Drive unit for hand tool machine - Google Patents
Drive unit for hand tool machine Download PDFInfo
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- CN1676282A CN1676282A CN200510063914.3A CN200510063914A CN1676282A CN 1676282 A CN1676282 A CN 1676282A CN 200510063914 A CN200510063914 A CN 200510063914A CN 1676282 A CN1676282 A CN 1676282A
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- turbine
- hand held
- held power
- air
- power machine
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- 230000007704 transition Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
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- 125000006850 spacer group Chemical group 0.000 claims description 2
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- 230000003292 diminished effect Effects 0.000 description 1
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- 238000004049 embossing Methods 0.000 description 1
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Classifications
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- 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
- B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/06—Driving main working members rotary shafts, e.g. working-spindles driven essentially by fluid pressure or pneumatic power
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- 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
- B24B47/14—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by liquid or gas pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Abstract
A hand tool machine comprises a housing 12 and device (18,22) connected above the housing and reelingly and/or vibratory drivingly installed. The hand tool machine is driven according to rule, in virtue of a sucking airflow, especially a suction cleaner, because a turbine wheel (34) is used as driving device and has special proper inlet, outlet guide grille (44,48), so as to obtain especially fine efficacy.
Description
Technical field
The present invention relates to a kind of hand held power machine, have a housing, it is carrying one can be by means of pressure medium, especially by the driven unit of suction air driving, and the latter has a turbine that is equipped with air blades.
Background technology
In patent specification US6347985 B1, known a kind of hand held power machine, it only drives by the suction airstream of a general commercial dust catcher.A known Pei Erdunshi turbine is used for this known hand held power machine as drive unit, and this turbine utilizes the suction airstream of dust catcher to come slave spindle or instrument rotation are driven.
The efficient of existing hand held power machine is relatively low, and can is not enough to by the pumping power that dust catcher provides meet the demands.Thus, if for the high request of operating power and for--design has this function--for such hand held power machine, do not possess simultaneously concerning the workpiece dedusting.
Summary of the invention
According to the present invention, a kind of hand held power machine with a housing has been proposed, it is carrying one can be by means of pressure medium, especially the driven unit that drives by suction air, the latter has a turbine that is equipped with air blades, wherein, at turbine, especially be equipped with an inlet guide leaf grating before the air-flow upstream of radial-flow turbine, it constitutes at least one passage, especially circular passage, this passage is arranged essentially parallel to the axis of turbine in a first area in airflow downstream, and be one in air-flow upstream arc-shaped transition and curve 90 ° zone in radially, therefore, along axial leaked-in air, radially inwardly be directed on the excircle of turbine.
The advantage of hand held power machine of the present invention is: be configured to the hand held power machine such as milling drum, self does not have motor and only relies on the suction airstream of a dust catcher to drive, when it is used, has very high power, the dust granules that produces in the grinding process all is transported away, thereby reach almost non-dusting ground effect, therefore reach the unification of the efficient suction of high stock removal and grinding dust.
Because drive unit mainly is made up of plastic member, so the very light portable of hand held power machine.
Turbine has at least one passage, it is provided with by the past radially inner side in the outside radially at the axis of airflow downstream perpendicular to turbine in a first area with stretching, and is a zone that is roughly parallel to the stretching, extension of turbine axis in air-flow upstream arc-shaped transition therefrom.Like this, obtained to have the very high again radial-flow turbine of extraordinary Total tune, power from fluid technique.
Identical passage is set parallel to each other, so air is radially inwardly mobile along air blades between the air blades of turbine, and subsequently along axially upwards flowing.Like this, the power of assurance moving air passes to turbine efficiently.
Rotating turbine and in relative rotation the inlet guide leaf grating have rotational symmetric structure, therefore, although its complex structure still can be made relatively simply.
Turbine is made of the bell shape bearing part of an inside, carrying the air blades of that radial outward is stretched out, dorsal fin shape on this bearing part, a radially outer is arranged essentially parallel to bell shape cover plate or the jacket bell jar that bearing part is settled, therefore, these air flow passage can have the very big radius of curvature that helps flowing.
Air blades on the bearing part has the curve trend of spatially spiral or the curve trend of vortex, therefore, can realize the big radius of curvature of air flow passage simply.
The air blades of turbine in the zone that is close with the inlet guide leaf grating on their radial outsides, is 0 ° to 30 ° inlet blade angle with respect to one of radial direction inclination uniformly regionally.Like this, create the transition that helps air-flow from the inlet guide leaf grating to turbine.
Turbine becomes one 60 ° outlet blade angle with respect to longitudinal axis in the end of its airflow downstream.Like this, the air mass flow on the swirling eddy component is little, and flow resistance also so very little.
Turbine diameter and is approximately 30 to 40mm height between 50 to 90mm.Like this, can obtain to be used for the suitable size of the turbine-driven set of hand held power machine.
The inlet guide leaf grating circlewise, especially with one heart, with very little slit spacer ring around turbine, therefore improved the efficient of turbine.
The inlet guide leaf grating has a plurality of passages similar, parallel to each other, and therefore flow resistance is very little in the inlet guide leaf grating.
The inlet guide leaf grating has the bearing part of a bell shape, and this bearing part is connected on the lower area of bearing part of turbine with flushing, and curved downwards towards outer arcuate ground diametrically.Like this, the air guide with larger radius of curvature is possible, and therefore can have very little flow resistance.
The inlet guide leaf grating carries a plurality of overlap shape inlet guide spares of fixing, especially being evenly spaced apart on its bearing part, along these guides, air-flow is by axially converting to along radially inwardly, especially import on the air conducting blade of turbine along tangential direction.Like this, air-flow accurately is directed to minimal flow resistance.
The inlet guide leaf grating is arranged essentially parallel to its bearing part and is carrying a bell-jar jacket spare with the spacing of the height of inlet guide spare, therefore, creates tubulose passage sealing, that help flowing with plain mode.
Inlet guide spare radially inwardly-until on the turbine, have a unification with respect to the angle of outlet of radial direction between 60 ° to 89 °.Like this, the energy of flow of air converts the rotation energy of turbine particularly well to.
At least in direct and turbine adjacent areas, the air blades that has with respect to turbine becomes 25 ° to 50 °, is preferably 35 ° of air guide faces that angle lapping is oblique inlet guide spare.Like this, press close to move out-of-date mutually because of turbine rotation when it, only can produce little pressure peak, and therefore only produce faint sound, therefore, noise is very little when working with hand held power machine.
The external diameter of inlet guide leaf grating is between 120 to 150mm, and its height is 20 to 30mm, like this, and for the drive unit of hand held power machine has found specially suitable size.
After turbine, connecting an export orientation leaf grating, basically all are being transformed into axial direction, make it to become advection from the air capacity on the rotational flow component of turbine outflow by it in airflow downstream.Like this, continue to have reduced flow resistance.
It is circular smooth, dish type fluid passage that the export orientation leaf grating constitutes a cross section, and it is to be realized by a plurality of export orientation spares that radially are radial arrangement.Like this, the shape stability of export orientation leaf grating self is good especially, is particularly suitable for reinforcing housing and can be easy to making.
The export orientation leaf grating as same wheel, has the central component of hub-like, and this central component is connected by the load-carrying ring of spoke-like export orientation spare with the wheel rim shape of an outside.Like this, it can be with the bearing block of its central component as turbine, and improve the intensity of housing simultaneously.
The export orientation spare of export orientation leaf grating has a boomerang shape cross section, its recessed domes constitute the air guide face, with respect to inflow direction, this air guide mask has the inlet angle and the angle of outlet that is approximately 90 ° that are approximately 50 °.Like this, with the air of rotational flow with low-down flow loss, conversion and smooth be the wire air-flow.
The export orientation leaf grating have 11 to 39, especially uniformly, the export orientation spare that is spaced apart from each other, like this, the export orientation leaf grating can have multiple change example, and they have different intensity/quality/flowing effect, thereby can be applied to the wide spectrum towards various demands.
The face of the contact air-flow on hand held power machine, especially inlet guide leaf grating and/or turbine and/or the export orientation leaf grating, flow resistance is designed, reduced in its surface by moulding.Therefore, dust adhesion can not be arranged on the surface of danger and reduce the power of turbine-driven set.
The housing of hand held power machine is made up of the member of ring-type and tubulose, and they can interconnect by flange.Like this, not only own wt is light, and shape stability is good, firm again simultaneously.
Description of drawings
Below be elaborated for the present invention by means of an embodiment and attached legend.
Shown in the figure be:
A vertical section of Fig. 1 super grinding machinery of the present invention
The exploded view of Fig. 2 super grinding machinery
A side view of Fig. 3 radial-flow turbine
A vertical view of Fig. 4 radial-flow turbine
The details of a three-dimensional view of an inlet guide leaf grating of Fig. 5
The inlet guide leaf grating vertical view among Fig. 6 Fig. 5
A part of an export orientation leaf grating of Fig. 7
The cross section of Fig. 8 export orientation spare
The specific embodiment
Fig. 1 has provided a hand held power machine 10, and it constitutes a super grinding machinery.It comprises a housing 12, and area configuration is a handle at an upper portion thereof, and it continues into a waist shape contraction structure 14 that is easy to grasping downwards, and broadening becomes a bell jar shape zone 15 subsequently.
Carrying a button 26 on the saucer wheel 18 fore central tips 24, after to its operation, saucer wheel 18 can taken off from housing 12 or saucer wheel support 28.Saucer wheel 18 or saucer wheel support 28 can drive by the eccentric wheel 32 that a driving shaft 30 and can not be positioned at this driveshaft end with the relative rotation and carry out orbital motion, therefore the point of each on the saucer wheel 18 and therefore each the single abrasive particle on the sand sheet 22 be the typical micrograph (schliffbild) of super grinding machinery all according to the given radius of the degree of eccentricity of eccentric wheel 32 roundlet that draws.
Other adjacent members of housing 12 are holding radial-flow turbine 34 with a narrow slit, and this slit is a suction opeing 46 on top in the axial end portion transition of radial-flow turbine 34, and the outside is bent, led to this suction opeing to the right.Begin the place at it, the upper end of radial-flow turbine 34 and driving shaft 30 all are supported on the export orientation leaf grating 48 in the axial direction, and the latter is as the bearing block of the top rolling bearing 40 of driving shaft 30.In addition, export orientation leaf grating 48 is configured to star or wheel shape, wherein, the central component 50 of its hub-like is carrying the rolling bearing 40 of driving shaft 30, and from it begin radially outwardly directed always, be spoke-like or be made into the export orientation spare 52 of blade, central component 50 and an outer field load-carrying ring 54 are coupled together.Between these spoke-like export orientation spares 52 (Fig. 5) is intermediate gaps 58, and the driving air that is produced by outside dust catcher is freely passed through after finishing its function.
The axial waste gas up that flows out from radial-flow turbine 34, its swirling eddy component is converted into parallel direct current air component by the export orientation spare 52 of export orientation leaf grating 48.Therefore, after this waste gas has few eddy current, does not have tangible flow loss, thereby by bending ancon, having the suction opeing 46 that very big radius of curvature helps flowing, curve about 90 ° and flatly flow out, and enter into one can be connected on the suction opeing 46, among the unshowned in the drawings dust collector hose, thereby guarantee that turbine 34 can be by Continuous Drive.
In order to drive hand held power machine 10, extraneous air flows through between the upside of saucer wheel support 28 and housing lower margin 16 and arrives radial-flow turbine 34, mix with dust-collecting air subsequently, dust-collecting air is in the bottom of saucer wheel 28 and pass it, especially pass air suction opening 56, low pressure by suction opeing 46 places is inhaled into, and around flowing through radial-flow turbine 34.
Radial-flow turbine 34 and import, export orientation leaf grating 44,48 and contain contact between the air of abrasive particle can produce a kind of wearing and tearing and dust deposit effect there, and this effect can damage the power and the service life of drive unit.In order to overcome this problem, with the contacted surface of suction air, be constructed with groove regular distribution, small especially, thereby make it to produce fainter flow resistance and higher surface strength.
Fig. 2 has provided the exploded view of the hand held power machine 10 among Fig. 1.The upper area of housing 12 is configured as handle, and constitute a special housing member 121 with the contraction structure 14 of the waist shape that is shaped above, rear, right side at direction of observation, stretch out a dust catcher adaptor 131 from this housing member, it is inserted among the suction opeing 46 that is not shown specifically among the figure.
Housing member 121 can be connected the flange of following bell-jar housing member 122 and be linked and packed with the right angle.Between housing member 121,122, settling an export orientation leaf grating 48 that radially is surrounded by them, this export orientation leaf grating can be linked and packed by the flange at right angle on the housing member 121 on top.
On the housing member 122 of bell shape, connecting a driving shaft downward on direction of observation 30.The exterior contour of axle, at zone line is outer-hexagonal post 301, and in the possible change example of another kind into the embossing shape or be smooth, and being used for realizing and be connected the form fit engagement of the radial-flow turbine 34 below the axial upper inlet nozzle blade cascade 44, this radial-flow turbine can be by being permanently fixed on the driving shaft 30 such as die casting or injecting method.
Inlet guide leaf grating 44 annulars, holding radial-flow turbine 34 with one heart, and can not be installed in the housing member 122 of bell shape with relatively rotating and go with driving shaft 30.Wherein, radial-flow turbine 34 passes the circular gap 446 (can from following insertion) of inlet guide leaf grating 44, and after assembling, the upper area of the cover body 341 of radial-flow turbine 34 stretches out above circular gap 446., axially go up the fresh air that flows into from below here, inwardly curve the center that flows to radial-flow turbine 34, it can finish its driving effect with very high efficient there.
During dust catcher entry into service on not providing, be connected in housing 12 among the figure, enter arrival inlet guide leaf grating 44 from below from the saucer wheel 18 region inhaled airs of bottom, described there air radially inwardly is transported on the radial-flow turbine 34 on passage 444 arc ground.These are similar, the passage of adjacent setting 444 by the footpath make progress spaced-apart bearing part 440 and cover body 441 and be stretched in this bearing part and this cover body between inlet guide spare 442 constitute, the air of high flow capacity is transported on the radial-flow turbine 34.Inlet guide leaf grating 44 is along radially being lived from top overlap joint by bell shape housing member 122, wherein, still the flange with the right angle is connected between the lowermost region 123 of housing member 122 and housing 12, and the lowermost region 123 of housing 12 laterally can be formed by interconnected half shell 124,125 by two.
In the lowermost region 123 of housing 12, between half shell 124,125, can lay vibrating member 20, and the auxiliary body that need not other just can fixedly assemble by the supporting of form fit, and therefore for the operation of hand held power machine 10, they support according to the rules.
Below direction of observation, what vibrating member 20 and saucer wheel 18 or saucer wheel support 28 can be rectangular being screwed or fixing with spring clip, therefore, is setting up being connected between housing 12 and the saucer wheel 18 on this position.Saucer wheel support 28 has a button that can be displaced sideways 26 on its preceding tip, the saucer wheel 18 that is positioned at its below locks on the position therebetween, thereby guarantees that this saucer wheel can not lose.On its side rotary position, button 26 is thrown off the saucer wheel 18 that is positioned at its below.
The zone, foremost of saucer wheel 18, be configured to a triangle saucer wheel 181, so that equip the sand sheet of a traditional isosceles triangle, this sand sheet has ectotropic side, on these side regions, connecting the Background Region of saucer wheel support 28 on the right at view, and align with the base of triangle saucer wheel 181 in the base of this Background Region.Bottom with the Background Region of saucer wheel support 28, the whole base of saucer wheel 18 has a profile that flatiron is planar, it is suitable for relatively large surface is processed efficiently, and such surface is excessive for the triangle milling drum of more old-fashioned structure.
In addition, the front area of saucer wheel 18 is independently triangle saucer wheel 181, tip with directed forward, can change, be easy to rotate, and therefore can a less triangular pointed directed forward will be used on the sand sheet when needed, perhaps behind triangle sand pad wear, can change at an easy rate equally, especially change with triangle saucer wheel 181.
In housing member 121,122 inside, export orientation leaf grating 48 axial support are in inlet guide leaf grating 44 belows, thereby guarantee can not lose, and do not have the slit, and have improved the guiding situation of air simultaneously.
Fig. 3 has provided a side view of radial-flow turbine 34, does not wherein have jacket body 341 shown in figure 2.Bearing part 340 is carrying a plurality of air blades 35 that the overlap shape is upwards holded up that are uniformly, a passage 342 is respectively arranged between these blades, air wherein, at first arc ground radially inwardly, subsequently then along axial upwards guiding, here, it flows out with one 60 ° exit angle α, and is directed to toward the dust catcher direction.This angle of outlet of 60 ° is converted into the revolution of radial-flow turbine 34 with the energy of flow of suction air, and wherein suction air can flow to dust catcher with the flow resistance of minimum behind the radial-flow turbine 34 of flowing through, and therefore improves the efficient in fluid system.
Air radially from outside be transported to radial-flow turbine 34 by inlet guide leaf grating 44, and again along axially leaving it.Air is in radial-flow turbine 34 inner pressure relieves and curve, thereby to axle 30 actings.In the present embodiment, the inlet angle of suggestion air blades 35 ends is 0 ° and 30 °.Here, should select like this, make air be issued to the desirable condition that becomes a mandarin in rated speed for the inlet angle.In order to guarantee to have enough curving, it is 60 ° that two turbines all are made into angle of impeller outlet alpha.The height of turbine should be selected like this, makes on the one hand from radially realizing lenitively to axial curving, and also wants to make certain (nennenswert) deflection that has on the meridian direction on the other hand.The inlet angle of air blades 35 can be between 0 to 50 °, and exit angle is then between 50 to 75 °.Selected turbine diameter is big more, and the force transmission effect on axle is good more, and therefore also mild more, promptly the process that the curves resistance of air is more little.Therefore the size of turbine only is subjected to the restriction of shell dimension, that is to say that for hand-guided grinding, turbine diameter is generally all between 50 to 90mm.
Fig. 4 has provided the vertical view of Fig. 3, wherein can clearly see: the blade tip 350 of air blades 35 with 30 ° β angle with respect to radial skew.
Fig. 5 has provided the side view of a solid of inlet guide leaf grating 44, and the jacket body 441 that can't not remove wherein is not shown with damaging.Like this, can clearly see annular or the bell shape structure that bearing part 440 with an internal clearance 446 is had.Bearing part is carrying the overlap shape inlet guide spare of upwards holding up 442, and their helical forms are curled and are stretched on the described bearing part, and therefore formation has the air delivery passage 444 of special larger radius of curvature, flows thereby be particularly conducive to air.Be positioned at the angle γ of the inlet guide spare end 443 of the air diverter 442 on circular gap 446 edges with respect to 35 ° of axial one-tenth, wherein, the effect at this inclination angle is to reduce noise.Because when radial-flow turbine 34 rotations, the edge that mutual vicinity is nuzzled up on the blade tip 350 of conducting element 442 and blade 35 is only understood origination point and is contacted, therefore, impact the intensity involve the sound peak value that causes thus and drop to minimumly, and reduced the acoustic emission of hand held power machine significantly.
The task of inlet guide leaf grating 44 is: with air vertically on the bottom transverse as far as possible the direction from tangent line import in the radial-flow turbine 34, and therefore guarantee that whole system has high efficient.In the example below, the inlet guide spare 442 of inlet guide leaf grating 44 with respect to three figure method to the angle of outlet be approximately 72 the degree.This angle can change between 60 ° to 75 ° according to specific embodiment.If it is too little that this angle Selection gets, tangential component diminishes, also therefore lowers efficiency.If this angle is excessive, the air blades 35 of radial-flow turbine 34 is blocked the fluid passage 444 of self, thereby has improved the pressure loss in the inlet guide leaf grating 44, and the pressure decay by radial-flow turbine 34 is diminished.In addition, the inlet guide leaf grating 44 of being constructed has the inlet guide spare end 443 that blade tip with radial-flow turbine 34 is 350 adjacent, tilt, and avoids like this strong compression shock occurring on the blade flow-impinged edge 351 of blade tip 350 and reaches temporal " delay ".Like this, the blade of turbine all never nuzzles up on the edge of impression throughout.This angle that is positioned at the inlet guide spare termination 443 of radially inner side is approximately 35 ° in the illustrated embodiment.In order to realize reducing effectively noise, should select this angle like this, two inlet guide spare ends 443 are meshed with an air blades 35 maintenances of radial-flow turbine 34 under rated speed, its typical angular number of degrees value is between 25 ° to 72 °.This angle setting, the position that can certainly be applied to radial-flow turbine 34 is conversely located on the blade tip 350 of radially outer.
Shown in vertical view among Fig. 7, be configured to wheeled export orientation leaf grating 48 and make like this, make export orientation spare 52 extend between the load-carrying ring 54 of intermediate member 50 and wheel rim shape.By means of spoke type export orientation spare 52, the meridional component of air-flow is returned on the low numerical value of trying one's best, and therefore air is directed in the dust catcher without spin from cordless power tool.In addition, spoke-like spigot surface 481 can be used as the support of the central component 50 from load-carrying ring 54 to hub-like, and this central component is as the bearing block of the top needle bearing of driving shaft 30.
Export orientation leaf grating 48 flows in the bottom of looking direction of observation, therefore by the right side deflection in direction of observation more on export orientation spare 52 of intermediate gaps 58 flow air.The rotational flow component quilt of air is along axially directed top.
Fig. 8 shows boomerang shape (bumerangartig) cross section of export orientation spare 52, and wherein, the inboard of its recessed song is as air guide face 481.For inlet angle λ and angle of outlet μ, all select 50 ° angle value for use because here the axial flow component that air had that flows out from radial-flow turbine 34 apparently higher than meridian to component.
Enforcement at other becomes in the example, and this inlet angle can be between 40 ° to 70 °, and exit angle is then between 80 to 100 °.The selection of the quantity of export orientation spare 52 should make air flow well enough, and the pressure loss in the export orientation leaf grating is as far as possible little.Under the situation of present embodiment, 23 export orientation spares have been selected for use.According to the difference of concrete operating position, can select 11 to 39 export orientation spares for use and reach preferable effect.
The reference number table
10 hand-held toolroom machines 40,42 30 top, the bottom axis of rolling
12 housings hold
131 switching parts, 44 inlet guide leaf gratings
14 waists, 440 bearing parts
15 bell jar shapes zone, 441 jacket bodies
16 lower limbs, 442 inlet guide spares
18 saucer wheels, 442 conducting elements
20 vibration bodies, 443 inlet guide spare ends
The passage of 22 sand sheets 444 44
24 tips, 446 circular gaps
26 buttons, 46 suction opeings
28 saucer wheels carry part 48 export orientation leaf gratings
The flow channel of 30 driving shafts 480 48
32 eccentric wheels, 481 air guide faces
34 radial-flow turbines, 52 export orientation spares
340 bearing parts, 54 load-carrying rings
341 jacket bodies, 56 dedusting holes
342 passages, 58 intermediate gaps
343 angles of outlet
The hole of 344 driving shafts 30
35 air blades
350 blade tips
Rolling bearing in 36 28
38 balance mass pieces
Claims (24)
1. hand held power machine, has a housing (12), it is carrying one can be by means of pressure medium, especially the driven unit (30 that drives by suction air, 34,44,48), the latter has a turbine (34) that is equipped with air blades (35), it is characterized by: in turbine (34), especially be equipped with an inlet guide leaf grating (44) before the air-flow upstream of radial-flow turbine, it constitutes at least one passage (33), especially circular passage, this passage is arranged essentially parallel to the axis of turbine (34) in a first area in airflow downstream, and be a zone that radially inwardly curves 90 ° in air-flow upstream arc-shaped transition, therefore, along axial leaked-in air, radially inwardly be directed on the excircle of turbine (34).
2. hand held power machine as claimed in claim 1, it is characterized by: turbine (34) has at least one passage (342), especially circular passage, this passage is provided with perpendicular to the radial axis of turbine (34) to the inside in airflow downstream in a first area with stretching, and is one in air-flow upstream arc-shaped transition and is roughly parallel to the zone that turbine (34) axis stretches.
3. hand held power machine as claimed in claim 1 or 2, it is characterized by: a plurality of similar passages (342) are set between air blades (35) parallel to each other, therefore air is radially inwardly led along air blades (35), and is guided along axially upwards continuing subsequently.
4. as the described hand held power machine of one of claim 1 to 3, it is characterized by: rotating turbine (34) and in relative rotation inlet guide leaf grating (44) have rotational symmetric structure.
5. as the described hand held power machine of one of claim 1 to 4, it is characterized by: turbine (34) is made of the bell shape bearing part (340) of an inside, this bearing part is carrying, and air blades (35) and a radially outer that radial outward is stretched out, the dorsal fin shape are arranged essentially parallel to cover plate or the jacket bell jar (341) that bearing part (340) is settled.
6. as the described hand held power machine of one of claim 1 to 5, it is characterized by: the air blades (35) on the bearing part (340) has the curve trend of spiral or vortex.
7. as the described hand held power machine of one of claim 1 to 6, it is characterized by: these air blades (35) are 0 ° to 30 ° inlet blade angle with respect to one of radial direction inclination in their radially outer and inlet guide leaf grating (44) adjacent areas uniformly regionally.
8. as the described hand held power machine of one of claim 1 to 7, it is characterized by: turbine (34) end thereon becomes one 60 ° outlet blade angle with respect to longitudinal axis.
9. as the described hand held power machine of one of claim 1 to 8, it is characterized by: turbine (34) diameter is between 50 to 90mm.
10. as the described hand held power machine of one of claim 1 to 9, it is characterized by: turbine (34) highly is approximately 30 to 40mm.
11., it is characterized by as the described hand held power machine of one of claim 1 to 10: inlet guide leaf grating (44) circlewise, especially with one heart, with very little slit spacer ring around turbine (34).
12. as the described hand held power machine of one of claim 1 to 11, it is characterized by: inlet guide leaf grating (44) has a plurality of passages similar, parallel to each other (444).
13. as the described hand held power machine of one of claim 1 to 12, it is characterized by: inlet guide leaf grating (44) has the bearing part (440) of a bell shape, it is connected on the lower area of bearing part (340) of turbine (34) with flushing, and curved downwards towards outer arcuate ground diametrically.
14. as the described hand held power machine of one of claim 1 to 13, it is characterized by: inlet guide leaf grating (44) carries a plurality of dorsal fin shape inlet guide spares (442) of fixing, especially being evenly spaced apart on its bearing part (440), along these inlet guide spares, air-flow is by axially converting to along radially inwardly, especially import on the air blades (35) of turbine (34) along tangential direction.
15. as the described hand held power machine of one of claim 1 to 14, it is characterized by: inlet guide leaf grating (44) is arranged essentially parallel to its bearing part (440) and is carrying a bell-jar jacket spare (441) with the spacing of the height of inlet guide spare (442).
16., it is characterized by as the described hand held power machine of one of claim 1 to 15: inlet guide spare (442) radially inwardly, up to turbine (34) go up, have a unification with respect to the angle of outlet of radial direction between 60 ° to 89 °.
17. as the described hand held power machine of one of claim 1 to 16, it is characterized by: inlet guide spare (442) is at least in direct and radial-flow turbine (34) adjacent areas, the air blades (35) that has with respect to turbine (34) becomes 25 ° to 50 °, is preferably 35 ° of air guide faces that angle lapping is oblique, therefore, when pressing close to turn over mutually, only can produce little pressure peak and faint sound.
18. as the described hand held power machine of one of claim 1 to 17, it is characterized by: the external diameter of inlet guide leaf grating (44) is between 120 to 150mm, the circular void at its center (446) diameter is the external diameter of turbine (34) no better than, the described turbine heart therein can rotate with very little slit spacing, and the height of inlet guide leaf grating (44) is between 20 to 30mm.
19. as one of above-mentioned claim described hand held power machine, it is characterized by: connecting an export orientation leaf grating (48) in airflow downstream afterwards at turbine (34), by it, the air capacity from the rotational flow component of turbine (34) outflow converts axial direction to.
20. hand held power machine as claimed in claim 19, it is characterized by: it is circular fluid passage (480) that export orientation leaf grating (48) constitutes a cross section, and this passage is to be export orientation spare (52) radial, that radially settle and to be realized by a plurality of.
21. as claim 19 or 20 described hand held power machines, it is characterized by: export orientation leaf grating (48), as same wheel, central component (50) with hub-like, this central component is connected with the load-carrying ring (54) of the wheel rim shape of an outside by spoke-like export orientation spare (52).
22. as claim 19,20 or 21 described hand held power machines, it is characterized by: the export orientation spare (52) of export orientation leaf grating (48) has a boomerang shape cross section, its recessed domes constitute air guide face (481), with respect to inflow direction, this air guide mask has one 50 ° the inlet angle and 90 ° the angle of outlet.
23., it is characterized by as the described hand held power machine of one of claim 16 to 18: export orientation leaf grating (48) have 11 to 39, especially equably, the export orientation spare (52) that is spaced apart from each other.
24. as the described hand held power machine of one of claim 1 to 23, it is characterized by: the drive unit of hand held power machine, the face of the contact air-flow of inlet guide leaf grating (44) and/or radial-flow turbine (34) and/or export orientation leaf grating (48) especially, have the surface texture moulding design, that reduce flow resistance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004016170A DE102004016170A1 (en) | 2004-03-30 | 2004-03-30 | Hand tool |
| DE102004016170.4 | 2004-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1676282A true CN1676282A (en) | 2005-10-05 |
Family
ID=34530477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510063914.3A Pending CN1676282A (en) | 2004-03-30 | 2005-03-30 | Drive unit for hand tool machine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1676282A (en) |
| DE (1) | DE102004016170A1 (en) |
| GB (1) | GB2412619B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274417B (en) * | 2007-03-28 | 2012-10-10 | 罗伯特·博世有限公司 | A random orbit sander |
| CN109514392A (en) * | 2019-01-10 | 2019-03-26 | 北京惠点信元科技有限公司 | Grinding device and sanding apparatus |
| CN109648432A (en) * | 2018-12-29 | 2019-04-19 | 聚享机器人（中山）有限公司 | A kind of electric iron clamping fixture of robot |
| CN114532894A (en) * | 2020-11-24 | 2022-05-27 | 莱克电气股份有限公司 | Vacuum cleaner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3412976A (en) * | 1967-02-08 | 1968-11-26 | Professional Instr Co | Vacuum held hydrostatic rotor |
| US5020968A (en) * | 1988-04-15 | 1991-06-04 | Ishikawajima-Harima Heavy Industries Co., Ltd. | System for controlling the rotating speed of a pneumatically driven spindle |
| JPH09295238A (en) * | 1996-04-30 | 1997-11-18 | Asahi Optical Co Ltd | Air spindle |
-
2004
- 2004-03-30 DE DE102004016170A patent/DE102004016170A1/en not_active Withdrawn
-
2005
- 2005-03-21 GB GB0505846A patent/GB2412619B/en not_active Expired - Fee Related
- 2005-03-30 CN CN200510063914.3A patent/CN1676282A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274417B (en) * | 2007-03-28 | 2012-10-10 | 罗伯特·博世有限公司 | A random orbit sander |
| CN109648432A (en) * | 2018-12-29 | 2019-04-19 | 聚享机器人（中山）有限公司 | A kind of electric iron clamping fixture of robot |
| CN109514392A (en) * | 2019-01-10 | 2019-03-26 | 北京惠点信元科技有限公司 | Grinding device and sanding apparatus |
| CN114532894A (en) * | 2020-11-24 | 2022-05-27 | 莱克电气股份有限公司 | Vacuum cleaner |
| CN114532894B (en) * | 2020-11-24 | 2024-02-06 | 莱克电气股份有限公司 | Dust collector |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004016170A1 (en) | 2005-10-20 |
| GB2412619B (en) | 2006-02-08 |
| GB0505846D0 (en) | 2005-04-27 |
| GB2412619A (en) | 2005-10-05 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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