CN101986780A - A housing for a gearbox of a device and method - Google Patents
A housing for a gearbox of a device and method Download PDFInfo
- Publication number
- CN101986780A CN101986780A CN2008800238135A CN200880023813A CN101986780A CN 101986780 A CN101986780 A CN 101986780A CN 2008800238135 A CN2008800238135 A CN 2008800238135A CN 200880023813 A CN200880023813 A CN 200880023813A CN 101986780 A CN101986780 A CN 101986780A
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- housing parts
- housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention relates to a housing for a gearbox of a device such as a power tool which may be a drill, a power screwdriver or a cutting tool. The housing includes a first housing portion having an internal surface and an external surface. The internal surface is cooperable with a gear located internally within the housing and the external surface is integrally formed with the internal surface. The housing also includes a second housing portion attached to the external surface of the first housing portion by the application of heat to the second housing portion.
Description
Technical field
The present invention relates to a kind of housing that is used for the equipment gearbox, described equipment for example is electric tool, and described electric tool can electric drill, electric screw driver and cutting element.The housing that the present invention is particularly suitable as the gearbox of electric tool uses, and described electric tool comprises funtion part and external mold clamping part, and is suitable as the method for making housing.
Background technology
A challenge of tool manufacturer is to want a kind of instrument can be provided, and it comprises the parts of realizing a plurality of purposes simultaneously.Have the instrument of multifunction component by design, can reduce a plurality of parts in the instrument of being used in, thereby make the lighter and easier use of instrument.Another benefit of multipurpose multifunctional operating system is to reduce the required material quantity of fabrication tool, thereby is manufacturer's reduction material cost.Another benefit is that multifunction component may comprise manufacturing step relatively still less, therefore can have lower manufacturing cost.Another challenge is, a kind of parts are provided, and these parts are realized a plurality of purposes that realized by parts independently usually of electric tool, but the performance and the quality of electric tool can not reduce simultaneously.
Some for example the electric tool of electric screw driver comprise gearbox, this gearbox bonds to the output shaft of motor armature and electric tool, for example the workpiece of screwdriver drill bit bonds to this output shaft.Gearbox is used for the rotation that the rotation of motor armature that the work by electric tool is produced is converted to the rotation of output shaft and bonds to the workpiece on the output shaft.The speed of gearbox causes the rotation of the speed ratio motor armature of output shaft to want slow relatively usually.By reducing the rotary speed of output shaft,, increased the moment of torsion of output shaft with respect to moment of torsion from motor with respect to armature.In other words, gearbox has increased the moment of torsion of motor, thus the revolving force that has increased output shaft and bonded to the workpiece on the output shaft.This is particularly useful in electric screw driver, wherein, can need enough torsional forces that screw is screwed in the workpiece of a slice timber for example.
The existing gearbox that is used for electric screw driver adopts the form of discrete parts usually, comprises gear box casing, and this gear box casing holds gear, gear input shaft and gear output shaft.Gear box casing is being installed on the screwdriver near on the position of motor, thereby makes armature and gear output shaft be complementary.Then, screwdriver output shaft and output shaft of gear-box are complementary, and are used to hold housing setting around gear box casing, gearbox power shaft, armature, gear output shaft and at least a portion screwdriver output shaft of electric tool internal part.
In the gear box casing of some type, the inside of gear box casing surface and the gear that is arranged in gear box casing can co-operation, the shape on inner surface and dispose that function is very important hereto.Therefore, if the shape on the surface, inside of gear box casing and configuration change or be out of shape, then this may produce negative influence to inner surface and the gear co-operation that is positioned at gear box casing.For example, gear box casing has a plurality of teeth on the portion surface within it, thereby the gear that makes gear box casing be used as ring gear and be positioned at gear box casing can be a planetary gear, thereby this means that it is for the shape and the configuration on the surface, inside of keeping gear box casing and prevent that it from deforming and co-operation is extremely important suitably for planetary gear.
The electric tool housing of internal part that is used to hold electric tool is usually around the gear box casing setting, thereby realization prevents the function of the internal part of mobile electric tool, and described internal part is gearbox power shaft, armature, output shaft of gear-box and at least a portion screwdriver output shaft for example.The housing of electric tool is used for also preventing that thereby exterior object is deposited in internal part and influences moving of they.The housing of electric tool also stops the user that thereby its clothes or their body part are clipped in generation injury in the mobile internal part.The electric tool housing can also be as the device that keeps electric tool in use.
Some electric tools can comprise external mold on tool housing, be used to reduce for the transmission vibrations of user's hand and/or be used to provide the surface of holding of holding attribute with improvement.In this tool housing, add elastomeric material by outer mold technique on the outer surface of relatively harder tool housing and/or have the material of higher relatively coefficient of friction.External mold is handled and to be generally included the tool housing that will form and be placed on and inject mould and the polymer of fusing is injected between mould and the tool housing.Make then described fusing polymer cooling and be saved in the elastomeric element of tool housing, then it is removed so that be assembled on the electric tool from mould.
For on the formed tool housing or in fact on formed any polymer with internal chamber, carrying out for external mold handles, existing problem is, heat is delivered to tool housing from the polymer of fusing and can causes process shell to deform in the external mold processing procedure.If shape and configuration for the surface, inside of tool housing can not change or be out of shape, then this problem is just even more serious.For example, be used for and the cooperative inner surface of the gear that is positioned at tool housing if tool housing has, to tool housing, bring negative influence may for inner surface and effective cooperation that the gear that is positioned at tool housing inside carries out the material external mold thereby then process shell is carried out the external mold processing.
For the equipment of for example electric tool provides simultaneously the problem as the housing of gear housing that can apply external mold and external shell is that housing suffers damage as the function of gear box casing.
Summary of the invention
Therefore, on the one hand, the invention provides a kind of housing that is used for the equipment gearbox, described housing comprises:
First housing parts with inner surface and outer surface, described inner surface can with the gear co-operation that is positioned at described enclosure interior, described outer surface and described inner surface form an integral body; And
Second housing parts, it is by the described outer surface of caking to described first housing parts.
In one form, described first housing parts is carried out mold treatment and with the described second housing parts external mold to the outer surface of described first housing parts.
The invention provides a kind of for example housing of the gearbox of the equipment of electric tool that is used for, comprise that have can be with the first on the cooperative inner surface of the gear that is positioned at housing and by the second portion of caking to first, for example second elasticity and/or clamping part.Second housing parts is bonded in the application of first housing advantageous particularly of the present invention in the heating process that single housing is used as gear box casing and apparatus casing and handle by for example external mold.Same, when for example the part of being handled by external mold of elasticity and/or clamping bonded on the housing of equipment by heating, the present invention can make no longer needed to have the independent gearbox and the housing of equipment.In other words, the invention enables to provide gear box casing for the equipment of for example electric tool, and this gear box casing also is used as the device external housing that applies external mold simultaneously, and can be not weakened as the function of gear box casing.
In one form, the shape on the described inner surface of described first housing parts is suitable for and described gear cooperating.The described internal table face of described first housing parts comprises the gear engagement part.
In one form, described inner surface is essentially cylindrical and comprises a plurality of tooth portion of inwardly stretching out from described column part.Described inner surface can also be in the radial direction round the central shaft of described first housing parts, and described a plurality of tooth portion can extend on the direction that is parallel to described axle.
Above-mentioned form of the present invention is favourable, because they can provide the gear box casing with first housing parts and second housing parts, described first housing parts has inner surface, described inner surface can be meshed with the gear that is positioned at described first housing parts, thereby described gear can be around the rotation of the inside of described first housing parts, described second housing parts by caking to the outer surface of described first housing parts.Therefore, described first housing parts can be used as ring gear, and described ring gear is meshed with the planetary gear that is positioned at the described first housing parts inside, and can have second housing parts through the external mold processing that bonds to described outer surface.
In another form, the described inner surface of described first housing parts receives and is connected to independently gear engagement parts, is used for engaging with another gear that is positioned at described housing.
In a form, described independently gear engagement parts are ring gears.
In another form, described second housing parts is handled by injection molding and is bonded on the described outer surface of described first housing parts.
In another form, described second housing parts is formed by elastomeric material.
The present invention of these forms is advantageously, because they can provide housing for the equipment of for example electric tool, this housing can absorb vibrations or the vibration from equipment to user's hand.
In another form, described second housing parts comprises interior surface opposing and outer surface, described inner surface bonds on the outer surface of described first housing parts, described outer surface is back to the described outer surface of described first housing parts, and described outer surface has higher coefficient of friction than the described outer surface of described first housing parts.
The present invention of these forms is favourable, because they can provide housing for the equipment of for example electric tool, provides more reliable clamping effect on this equipment.
In another form, the outer surface of first housing parts comprises the recess that the concave engagement portions that is used to receive described second housing parts is divided.In another form, the outer surface of first housing parts and described second housing section phase-splitting fusing.The advantage that the present invention of above-mentioned form has is that they can be for equipment provides housing, and this housing has second housing parts that bonds to first housing parts securely.The housing that is produced is also durable especially and can resist wearing and tearing.
In a form, second housing parts is applicable to apparatus for fastening.In another form, equipment is the electric tool of electric screw driver for example.The advantage of the present invention of these forms is, they provide housing for the gearbox of the electric tool of for example electric screw driver, described housing has clamping surface, in addition, described electric tool can have integrated extra unitary part, and this unitary part is as the integrated gear box casing or the apparatus casing of clamping surface.The tool equipment of for example electric screw driver that therefore, is produced can be made for than up to now scheme have less components, use still less material and lower cost.
On the other hand, the invention provides a kind of method that is formed for the equipment gearbox, described method comprises:
Form first housing parts, described first housing parts comprises inner surface and outer surface, described inner surface can with the gear co-operation that is positioned at described housing, described outer surface and described inner surface form an integral body; And
By heat being applied to described second housing parts, second housing parts is bonded on the described outer surface of described first housing parts.
Said method is favourable, because it provides a kind of scheme of housing of manufacturing equipment gearbox, described housing has first and second portion, first has can be cooperative inner surperficial with the gear that is positioned at housing, second portion for example is a part flexible and/or that clamp, thereby it bonds in the first by second portion is heated.Equally, the present invention no longer needs independent gear box casing and apparatus casing so that the external mold part of integrated for example second elasticity and/or clamping external mold part.
In a kind of form of this method, the step of described formation first housing parts comprises carries out mold treatment to described first housing parts, describedly second housing parts is bonded to first step of crossing on the outer surface of body portion comprises the described second housing parts external mold to the described outer surface of described first housing parts.
In another form, the step of described formation first housing parts comprise will fusing polymer be injected in first mold and thereby the polymer that solidifies described fusing forms described first housing parts, the described step that second housing parts is bonded to the outer surface of first housing parts comprise will fusing polymer be injected in second mold, wherein, described second mold is partly limited by the described outer surface of described first housing parts.
In another form, the step on the surface, inside of described formation first housing parts comprise with described inner surface be shaped to can with described gear co-operation.
In another form, describedly also comprise, in the process of the outer surface that described second housing parts is bonded to described first housing parts, keep the shape on the surface, inside of described first housing parts.
In another form, the step of the inner surface configuration of described maintenance comprises the surface, inside of supporting described first housing parts.
Keep the step of shape on the surface, inside of first housing parts to comprise shape holding part is positioned at described inner near surface.In a form, described shape holding part is the mould that is shaped to the surface, inside that forms first housing parts.
The true advantage of the present invention of above-mentioned form is, they can guarantee, after bonding to first housing parts and second housing section together, the surface, inside of first housing parts can not bend or is out of shape owing to heat is delivered to first housing parts from second housing parts.
In a form, described first housing parts and described second housing parts are formed by polymer, and the polymer that forms second housing parts has higher coefficient of friction than the polymer that forms first housing parts.Described second housing parts is formed by the elastomeric polymer of for example thermoplastic resin (TPR).The advantage that the present invention of this form has is that it can provide the housing of the equipment of Production Example such as electric tool, and more reliable clamping effect and/or vibrations or the vibration of absorption from equipment to user's hand are provided on equipment.
The outer surface of described first housing parts comprises recess, heat is applied to described second housing parts causes the concave engagement portions branch of second housing parts to be received in the described recess.Heat is applied to second housing parts can also be fused to second housing parts on the outer surface of first housing parts.The advantage that the method for above-mentioned form has is, it can be made has strong bond to second housing parts of first housing parts, durable especially and can resist the electric tool housing of wearing and tearing.
Description of drawings
Describe the present invention below with reference to accompanying drawings in more detail, the housing of equipment gearbox according to a preferred embodiment of the invention has been shown in the described accompanying drawing, wherein, described equipment is the Ropeless electric screwdriver.The details of accompanying drawing and relevant detailed description not should be understood to substitute the front to of the present invention general, describe widely.
Fig. 1 is the perspective view of the Ropeless electric screwdriver of integrated housing according to a preferred embodiment of the invention.
Fig. 2 is the sectional view of electric screw driver shown in Figure 1.
Fig. 3 is the vertical view of screwdriver housing shown in Figure 1.
Fig. 4 is along the sectional view of the screwdriver housing of section line A-A intercepting among Fig. 3.
Fig. 5 is the side view that is integrated with the screwdriver housing shown in Figure 1 of drive motor and screwdriver output shaft.
Fig. 6 is along the sectional view of the screwdriver housing of section line A-A intercepting in Fig. 5.Housing comprises a plurality of gears that are arranged in housing, is used for the rotation of the armature of drive motor is delivered to the screwdriver output shaft.
Fig. 7 is the upward view of housing shown in Figure 1.
Fig. 8 is the perspective view of housing shown in Figure 1.
The side view of the housing shown in Figure 1 of Fig. 9 drive motor shown in Fig. 5 that has been integrated and screwdriver output shaft.
The perspective view of the housing shown in Figure 1 of Figure 10 drive motor shown in Fig. 5 that has been integrated and screwdriver output shaft.
Figure 11 is the sectional view that comprises the gearbox of the screwdriver of the housing of another form according to the present invention.
Figure 12 is the perspective exploded view of gearbox shown in Figure 11 and housing.
The specific embodiment
Fig. 1 and Fig. 2 show a wireless electric screwdriver 10, and it comprises main body 15 and housing 20, and described housing 20 bonds to an end of main body 15.Screwdriver output shaft 17 stretches out and has the hexagonal recess 18 of the hexagonal shape axle of the drill bit (not shown) that is used for receiving therein screwdriver from housing 20.Screwdriver 10 comprises the electrically-actuated device of motor 2 forms that are arranged in main body 15 and is used to control switch 14 from the electrical energy storage device 4 that is positioned at main body 15 to the flow of electrical power of motor 2.Housing 20 is parts that the main body 15 with screwdriver 10 is separated.
To as shown in Fig. 9, housing 20 is made of first housing parts 27 and second housing parts 28 as Fig. 1.First housing parts 27 has the awl post shapes, and its end 25 from the main body 15 that bonds to screwdriver 10 extends to output shaft 17 from its another end 21 of stretching out.Cylindrical hole 22 is formed in the end 21, so that output shaft 17 passes through wherein.First housing parts 27 has inner surface 30 and outer surface 31.Inner surface 30 limits hollow internal cavity 32.Inner surface 30 has the cylindrical shape of taper and comprises annular surface part 35 that centers on hole 22 and the frusto-conical surface part 36 that extends transverse to periphery part 37 from annular surface part 35.Periphery part 37 has the tooth portion 38 of a plurality of elongations, and tooth portion 38 radially inwardly stretches out towards the direction of principal axis of periphery part 37.Tooth portion 38 places mutually around whole periphery part 37 contiguously.Periphery part 37 extends to annular surface part 39, and annular surface part 39 is from the 37 outside horizontal expansions of periphery part.The second periphery part 40 is from 39 horizontal expansions of annular surface part.The second annular surface part 41 is from the 40 outside horizontal expansions of the second periphery part.Three cylindrical surface portion 42 is from 41 horizontal expansions of the second annular surface part.Periphery part 37,40 and 42 is parallel to each other.Annular end surface 43 is from the 42 outside horizontal expansions of three cylindrical surface portion.Annular end surface 43 is positioned at the end 25 of first housing parts 27, and described end 25 bonds to the main body 15 of screwdriver 10.The outer surface 31 of first housing parts 27 extends transverse to end 21 from annular end surface 43, and output shaft 17 stretches out from described end 21.End 21 comprises the annular surface that inwardly extends transverse to cylindrical hole 22 from outer surface 31.Outer surface 31 has crooked frustoconical shape.
Each second gear 60 rotatably is installed on the protuberance 63 from second axle 64 in the same manner.Motor 2 has the armature 3 that extends from motor 2.Central gear 6 bonds to armature, and when switch 14 was operated to that electric energy offered motor 2, described central gear 6 rotated along armature 3.Central gear 6 has a plurality of tooth portion 7, and described tooth portion is meshed with the tooth portion 62 of second gear 60, and wherein, second gear 60 is as planetary gear.The tooth portion 62 of second gear 60 also is meshed with the tooth portion 38 of elongation, and described elongation tooth portion 38 is periphery part 37 inwardly stretch out in the radial direction internally.Therefore, the elongation tooth portion 38 of cylindrical surface part 37 is as annular gear wheel, thereby the rotation of the central gear 6 that produces owing to the rotation of the operation of motor 2 and armature 3 causes second planetary gear 60 to rotate around the annular gear wheel of cylindrical surface part 37, simultaneously also around each protuberance 63 rotations of second axle 64.This causes second axle 64 to be rotated around an axle then.Second axle 64 has the horizontal arm 66 that extends to the base portion 13 of output shaft 17 from protuberance 63.Described horizontal arm 66 is as a whole with the base portion 13 of output shaft 17.Therefore, the operation of motor 2 causes the rotation of central gear 6, causes the rotation of second planetary gear 60 then, causes the rotation of second axle 64 then, causes the rotation of output shaft 17 then.
The annular gear wheel of central gear 6, second planetary gear 60 and cylindrical surface part 37 is configured to pre-determine the ratio between the rotary speed of armature 3 of the rotary speed of output shaft 17 and motor 2.Usually, described ratio is arranged so that the rotation of speed ratio armature 3 of output shaft 17 is slower, for example is 2: 1,3: 1 or any other suitable ratio.Like this, the moment of torsion that motor 2 is applied on the armature 3 is the multiple of the moment of torsion in the output shaft 17, this makes output shaft 17 enough moments of torsion can be applied on the driver bit that is arranged in recess 18, goes thereby effectively screw is screwed in the workpiece of a slice timber for example.
Therefore, first housing parts 27 forms gear box casing and relate to first gear 50 and second gear 60 that is arranged in first housing parts 27 on function.Therefore, in case first housing parts 27 has formed, have importantly then internally that the inside dimension of the cylindrical surface part 27 of the elongation tooth portion 38 of inwardly stretching out in the radial direction of periphery part 27 is kept perfectly, otherwise gearbox can not be worked suitably or can workable efficient can be reduced.
The outer surface 31 of first housing parts 27 comprises the recess (not shown), the thermoplastic of part fusing enters described recess, thereby when described thermoplastic cools off and solidifies, this part thermoplastic hardening in the recess, thus the concave engagement portions that forms the integral body of second housing parts 28 is divided so that second housing parts 28 is bonded to first housing parts 27.In addition, when with second housing parts, 28 external mold to the first housing parts 27, because heat is from the transmission of the thermoplastic of fusing, by the partial melting and the mixing of first housing parts 27, the inner surface 75 of second housing parts 28 and the outer surface 31 of first housing parts 27 are fused.Bonding or seam between second housing parts 28 and first housing parts 27 very firmly, lasting and can resist liquid and and the entering of fragment.
The thermoplastic of second housing parts 28 is preferably softer plastics and has than the material that is used to form first housing parts 27 has higher coefficient of friction.For example, second housing parts can be made by TPR (thermoplastic fat), TPE (thermoplastic elastomer) or any thermopolymer that other can absorb physical shock, and it is softer relatively, easy deformation can be an Any shape with Mould Machining also.Therefore, the outer surface 76 of second housing parts 28 that is produced has the coefficient of friction higher than the outer surface 31 of first housing parts 27, and the clamping area that is used for housing 20 is provided and has been used to absorb from screwdriver 10 and be delivered to some vibrations of user's hand and the device of vibration.Housing 20 and output shaft 17 and to be arranged in the drill bit of output shaft 17 center dants 18 adjacent.Have in this zone that to clamp outer surface 76 be favourable, this is because it can make the user hold with a firm grip and exactly drill bit is placed on the screw terminal, and by screwdriver 10 bigger active force is applied on the screw.Therefore, clamping outer surface 76 makes the user can use the rotation of output shaft 17 to come more effectively screw to be screwed into workpiece.Clamping outer surface 76 also helps to prevent user's hand generation slip and come to harm.Clamping outer surface 76 also makes the user can apply in the mode that meets the ergometrice than there not being the bigger active force of this clamping outer surface 76.
Another benefit of housing 20 is the gearbox that it holds screwdriver 10, described gearbox must be adjacent with output shaft 17, and do not need independent gearbox and screwdriver housing, thereby second housing parts 28 that passes through external mold processing integrated resiliency and/or that clamp.Therefore, housing 20 helps making having and comprises the still less screwdriver 10 of the gearbox of parts and material, its manufacturing cost is lower, manufacturing and assembling are more efficient, weight is lighter, described gearbox comprises the part of handling through external mold, and this part is used to provide clamping area in particularly preferred embodiment, and described clamping area can be used in to be held parts with a firm grip and/or have vibrations and/or the attribute of vibration absorption.
The method that forms housing 20 comprises that first housing parts 27 is carried out injection molding to be handled.This comprises provides mould, and described mould can be in first and second portion (not shown).The shape of first provides outer surface 31, and the shape of second portion provides the surface, inside 30 of first housing parts 27.Therefore, the shape of second portion provides a plurality of elongation tooth portion 38, and described elongation tooth portion 38 is inwardly the stretching out of cylindrical surface part 37 on surface 30 in the radial direction internally.In another possible embodiment, the shape of the second portion of mould does not provide tooth portion, and having provided level and smooth cylindrical surface part 37 or any other desirable surface configuration, the independent annular gear wheel of being made by plastics, metal or any other suitable material can match with it.With the suitable thermoplastic fusing of for example PBT (polybutylene terephthalate) and with the mold that the space limited between two mould parts of it injection.The injection molding parameter can be: heat distortion temperature be 162 the degree (0.45Mpa, 6.4mm), 63 the degree (1.8Mpa, 6.4mm); Proportion is 1.43g/cm
3Mold shrinkage is 1.2-1.4%; Fusion temperature is the 230-250 degree.In case the plastics of fusing are arranged in mould, then be cooled to the shape of reflection chamber shape, just first housing parts 27.First housing parts 27 that forms is component end items, no longer needs other work before being assembled into electric screw driver 10.Be used for injector (not shown) of the present invention and have two basic assemblies: be used for plastic molting and send it to the injection unit (not shown) of mould and be used for the anchor clamps that keep mould and after mold treatment, remove various piece against injection pressure.Inject the unit and before plastics are injected mould it is melted, the plastics after will melting with controlled, predetermined pressure and speed then inject mould.Thereby the plastics after the fusing enter mold by passage and enter in the mould, and described passage is also referred to as running channel.Mould also has passage therein and comes circulating cooling liquid, is generally water, so as in predetermined zone the plastics of the heat of cooling.When it cools off, the thermoplastic material change.After injecting circulation, anchor clamps are opened mould part gradually.When enough cooling off, first housing parts 27 is opened and taken away to mould.
The method that forms housing 20 also comprises the outer surface 31 that second housing parts 28 is bonded to first housing parts 27.This comprises the second molded step, this step comprises and places the second mould (not shown) to form second mold in the middle of their first housing parts 27, wherein, the part of second mold is limited by the part of outer surface 31 of will be bonding in the above and covering first housing parts 27 of second housing parts 28.Then the second melting heat thermoplastic plastic is injected in the mould.The outer surface 31 of first housing parts 27 can be formed with the recess (not shown), part at the second melting heat thermoplastic plastic described in the second molded step enters into described recess, thereby when second thermoplastic cools off and solidifies, entered that part of second thermoplastic hardening of recess, thereby form the concave engagement portions branch of the integral body of second housing parts 28, to strengthen the bonding of second housing parts 28 and first housing parts 27.In addition, when with second housing parts, 28 external mold to the first housing parts 27, because the transmission of heat from second thermoplastic of fusing, by the partial melting and the mixing of first housing parts 27, the inner surface 75 of second housing parts 28 and 31 fusions of the outer surface of first housing parts 27.Bonding or welding between formed second housing parts 28 and first housing parts 27 is very firm, lasting and can resist entering of liquid and fragment.
Described method also comprises, in the process with the outer surface 31 of second housing parts, 28 external mold to the first housing parts 27, keeps the shape on inner surface 30.Can adopt inner surperficial 30 the mode of any suitable maintenance, make to be applied on second housing parts 28 so that can not make inner surface 30 deform its heat that bonds on first housing parts 27.This mode that keeps inner surperficial 30 shapes can comprise the shape holding part (not shown) is positioned near the inner surface 30.Described shape holding part can comprise the second portion of first mould, and its shape forms the surface, inside 30 of first housing parts 27 in first molding process.The another kind of mode that keeps inner surperficial 30 shapes comprises by gas or liquid pressure is applied on the inner surface 30 that the residing pressure of described gas or liquid is enough to keep the shape on the surface, inside 30 of first housing parts 27 in second molding process.
Figure 11 and Figure 12 show the gearbox that is used for screwdriver 80 that comprises another housing 90 according to of the present invention.Wherein, represent identical feature for the same numeral relevant with the feature of housing 20 disclosed herein and 90.Housing 90 is formed by first housing parts 27 and second housing parts 28.First housing parts 27 has inner surface 30 and outer surface 31.Inner surface 30 limits hollow lumen chamber 32.Inner surface 30 has periphery part 37.Periphery part 37 has a plurality of elongation tooth portion 38, and described elongation tooth portion 38 is inwardly stretching out in the radial direction towards the axle of periphery part 37.Tooth portion 38 is provided with mutually around whole periphery part 37 contiguously.Periphery part 37 extends to annular surface part 39a, and described annular surface part 39a laterally stretches out from periphery part 37.The second periphery part 40a is from annular surface part 39a horizontal expansion.Periphery part 40a extends to annular surface part 39, and described annular surface part 39 is from the outside horizontal expansion of periphery part 40a.The second periphery part 40 is from 39 horizontal expansions of annular surface part.The second annular surface part 41 is from the 40 outside horizontal expansions of the second periphery part.Three cylindrical surface portion 42 is from 41 horizontal expansions of the second annular surface part.Periphery part 37,40a, 40 and 42 are parallel.Annular end surface 43 is from the 42 outside horizontal expansions of three cylindrical surface portion.Annular end surface 43 is positioned on the end 25 of housing 90, is used for engaging with the main body 15 of screwdriver 10.The outer surface of first housing parts 27 extends transverse to the opposed end 21 of housing 90 from annular end surface 43, output shaft 17 stretches out from described end 21.Described end 21 is annular surfaces, and it inwardly extends transverse to cylindrical hole 22 from outer surface 31, and described output shaft 17 extends from described cylindrical hole 22.Outer surface 31 has crooked frustoconical shape.
One group of second gear 60 also is arranged in first housing parts 27 and rotatably is installed to the protuberance 63 that stretches out from second axle 64.The armature (not shown) of motor joins the central gear (not shown) to, and when described motor start-up, described central gear is connected to described armature and is rotated by described armature.Central gear is meshed with tooth portion 62 on second gear 60, and described second gear 60 is as planetary gear.With ring gear 95 is the inside that the independent gear engagement parts of form are positioned at housing 90.Ring gear 95 can be made by metal or any suitable material, and its size is fit to be assemblied in the space that is provided between annular surface part 39a and the periphery part 40a.Therefore, ring gear 95 and periphery part 37 and the tooth portion 38 of placing above thereof are adjoining.Ring gear 95 has the tooth portion 96 of its inside guiding, and described tooth portion 96 is around the inner periphery setting of ring gear 95.Therefore, the tooth portion 96 of ring gear 95 engages with the tooth portion 62 of second gear 60 that is positioned at housing 90.In Figure 11 and Figure 12 in disclosed the setting, the tooth portion 62 of second gear 60 is not meshed with the elongation tooth portion 38 that the radial direction of periphery part 37 is internally inwardly stretched out.
Therefore, the rotation of the armature of motor and the central gear that engages makes second planetary gear 60 around ring gear 95 rotations, and the while is around each protuberance 63 rotations of second axle 64.This causes second axle 64 to be pivoted then.Therefore, the work of motor 2 causes central gear 6 to rotate, and causes second planetary gear 60 to rotate then, causes second axle 64 to rotate then, causes another central gear 98 that extends from second axle 64 to rotate then.Central gear 98 is meshed with first gear 50, thereby the rotation of the central gear 98 that extends from second axle 64 causes the rotation of first gear 50, thereby causes the rotation of first axle 54.The rotation of first axle 54 causes the rotation of output shaft 17.
Therefore, first housing parts 27 forms gear box casing 90 and relevant on function with first gear 50.In addition, first housing parts 27 receives and is connected to the independent gear engagement parts of ring gear 95 forms, is used for engaging with second gear 60 that is positioned at housing 90.But interacting with some internal gears on the function do not interacting with other gear at first housing parts 27 is that this set is favourable under the suitable situation.For example, some internal gears are the rotation of high speed more, it may be suitable for utilizing the metal ring gear insertion parts that places first housing parts, and other gear can be with lower speed rotation, under this speed, the surface, inside 37 of first housing parts 27 may be enough to provide the interaction on the function with those gears.
It will be understood to those of skill in the art that the present invention as described herein can carry out various changes and modifications.Should be understood that, the present invention includes all these distortion and modification, these all distortion and modification all fall into the spirit and scope of the present invention.
May be under the situation of advocating the application's priority in Australia or submit other patent application abroad to.Claims tentative after should be appreciated that only provide by way of example, are not intended to limit the scope of any later patent application.May to add or the omission technical characterictic in the book in tentative right in the future, thereby further limit or limit again the present invention.
Claims (33)
1. housing that is used for the equipment gearbox, described housing comprises:
First housing parts with inner surface and outer surface, described inner surface can with the gear co-operation that is positioned at described enclosure interior, described outer surface and described inner surface form an integral body; And
Second housing parts, it is by the described outer surface of caking to described first housing parts.
2. housing according to claim 1, wherein, to described first housing parts carry out mold treatment and with the described second housing parts external mold to the described outer surface of described first housing parts.
3. housing according to claim 1 and 2, wherein, the shape on the described inner surface of described first housing parts is suitable for and described gear cooperating.
4. according to the described housing of the arbitrary claim in front, wherein, the internal table face of described first housing parts comprises the gear engagement part.
5. according to the described housing of the arbitrary claim in front, wherein, described inner surface is essentially cylindrical and comprises a plurality of tooth portion of inwardly stretching out from described column part.
6. housing according to claim 4, wherein, round the central shaft of described first housing parts, described a plurality of tooth portion extends on the direction that is parallel to described axle in the radial direction on described inner surface.
7. according to the described housing of the arbitrary claim in front, wherein, surface, the inside of described first housing parts receives and is connected to independently gear engagement parts, is used for engaging with another gear that is positioned at described housing.
8. housing according to claim 7, wherein, described independently gear engagement parts are ring gears.
9. according to the described housing of the arbitrary claim in front, wherein, described second housing parts is handled by injection molding and is bonded on the outer surface of described first housing parts.
10. according to the described housing of the arbitrary claim in front, wherein, described second housing parts is formed by elastomeric material.
11. according to the described housing of the arbitrary claim in front, wherein, described second housing parts comprises interior surface opposing and outer surface, described inner surface bonds on the outer surface of described first housing parts, described outer surface is back to the described outer surface of described first housing parts, and described outer surface has higher coefficient of friction than the described outer surface of described first housing parts.
12. according to the described housing of the arbitrary claim in front, wherein, the outer surface of described first housing parts comprises the recess that the concave engagement portions that is used to receive described second housing parts is divided.
13. according to the described housing of the arbitrary claim in front, wherein, the outer surface of described first housing parts and described second housing section phase-splitting fusing.
14. according to the described housing of the arbitrary claim in front, wherein, described second housing parts is configured to be provided for the surface of apparatus for fastening.
15. according to the described housing of the arbitrary claim in front, wherein, described equipment is electric tool.
16. according to the described housing of the arbitrary claim in front, wherein, described equipment is electric screw driver.
17. according to the described housing of the arbitrary claim in front, wherein, described first housing parts and described second housing parts are formed by polymer.
18. a method that is formed for the equipment gearbox, described method comprises:
Form first housing parts, described first housing parts comprises inner surface and outer surface, described inner surface can with the gear co-operation that is positioned at described housing, described outer surface and described inner surface form an integral body; And
By heat being applied to described second housing parts, second housing parts is bonded on the outer surface of described first housing parts.
19. method according to claim 18, wherein, the step of described formation first housing parts comprises carries out mold treatment to described first housing parts, describedly second housing parts is bonded to first step of crossing on the outer surface of body portion comprises the described second housing parts external mold to the outer surface of described first housing parts.
20. according to claim 18 or 19 described methods, wherein, the step of described formation first housing parts comprise will fusing polymer be injected in first mold and thereby the polymer that solidifies described fusing forms described first housing parts, the described step that second housing parts is bonded to the outer surface of first housing parts comprise will fusing polymer be injected in second mold, wherein, described second mold is partly limited by the outer surface of described first housing parts.
21. according to the described method of arbitrary claim in the claim 18 to 20, wherein, the step that forms the surface, inside of first housing parts comprise with described inner surface be shaped to can with described gear co-operation.
22. method according to claim 21 also comprises: in the process of the outer surface that described second housing parts is bonded to described first housing parts, keep the shape on the surface, inside of described first housing parts.
23. method according to claim 22, wherein, the step of the inner surface configuration of described maintenance comprises the surface, inside of supporting described first housing parts.
24., wherein, keep the step of shape on the surface, inside of first housing parts to comprise shape holding part be positioned at described inner near surface according to claim 22 or 23 described methods.
25. method according to claim 24, wherein, described shape holding part is the mould that is shaped to the surface, inside that forms first housing parts.
26. according to the described method of arbitrary claim in the claim 15 to 25, wherein, described first housing parts and described second housing parts are formed by polymer, and the polymer that forms second housing parts has higher coefficient of friction than the polymer that forms first housing parts.
27. according to the described method of arbitrary claim in the claim 15 to 26, wherein, described second housing parts is formed by elastomeric polymer.
28. according to the described method of arbitrary claim in the claim 15 to 27, wherein, the outer surface of described first housing parts comprises recess, heat is applied to described second housing parts causes the concave engagement portions branch of second housing parts to be received in the described recess.
29., wherein, second housing parts is fused on the outer surface of first housing parts by heat being applied to second housing parts according to the described method of arbitrary claim in the claim 15 to 28.
30. a housing that is used for the equipment gearbox is basically shown in arbitrary accompanying drawing of the embodiment of the invention.
31. a method that forms the design gearbox, it is gone up shown in arbitrary accompanying drawing of the embodiment of the invention.
32. an electric tool comprises according to the described gear box casing of the arbitrary claim in front.
33. an electric screw driver comprises according to the described gear box casing of the arbitrary claim in front.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2007902477 | 2007-05-09 | ||
| AU2007902477A AU2007902477A0 (en) | 2007-05-09 | A housing for a gearbox of a device and method | |
| PCT/AU2008/000640 WO2008138037A1 (en) | 2007-05-09 | 2008-05-09 | A housing for a gearbox of a device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101986780A true CN101986780A (en) | 2011-03-16 |
Family
ID=40001575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800238135A Pending CN101986780A (en) | 2007-05-09 | 2008-05-09 | A housing for a gearbox of a device and method |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2152489A4 (en) |
| CN (1) | CN101986780A (en) |
| WO (1) | WO2008138037A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212218370U (en) | 2017-10-20 | 2020-12-25 | 米沃奇电动工具公司 | electrical tools |
| DE102019213720A1 (en) * | 2019-09-10 | 2021-03-11 | Robert Bosch Gmbh | Hand machine tool and method for operating the hand machine tool |
| EP4335595A1 (en) * | 2022-04-27 | 2024-03-13 | Milwaukee Electric Tool Corporation | Power tool with bearing retainer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3257877A (en) * | 1963-07-29 | 1966-06-28 | Reed Roller Bit Co | Power wrenches |
| DE3326591A1 (en) * | 1983-07-23 | 1985-01-31 | Wagner, Paul-Heinz, 5203 Much | Rotary tool |
| US5080180A (en) * | 1988-11-14 | 1992-01-14 | Atlas Copco Tools Ab | Torque impulse power tool |
| EP0804985A1 (en) * | 1996-04-29 | 1997-11-05 | Black & Decker Inc. | Hand held motorised tool with over-moulded cover |
| US20020096341A1 (en) * | 2001-01-23 | 2002-07-25 | Hagan Todd A. | Housing with functional overmold |
| EP1157791B1 (en) * | 1995-07-28 | 2007-01-17 | Black & Decker Inc. | Production assembly tool |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4474077A (en) * | 1982-02-01 | 1984-10-02 | Black & Decker Inc. | Housing retaining means for portable power tools and method of assembly therefor |
| EP0226426B1 (en) * | 1985-12-06 | 1990-05-16 | Desoutter, Limited | Two speed gearbox |
| JP4629202B2 (en) * | 2000-09-07 | 2011-02-09 | 株式会社信濃製作所 | Ratchet wrench |
| US6435285B1 (en) * | 2002-01-04 | 2002-08-20 | Feng-Chun Tsai | Structure for enhancing torque output of electric drill |
| US6655473B1 (en) * | 2002-12-31 | 2003-12-02 | Ying Fang Chi | Hand tool with an adjustable rotational speed and torsion force |
| US7052382B2 (en) * | 2003-08-26 | 2006-05-30 | Credo Technology Corporation | Accessory attachment for rotary hand tools |
| DE102004011617B4 (en) * | 2004-03-10 | 2013-07-18 | Hilti Aktiengesellschaft | planetary gear |
-
2008
- 2008-05-09 CN CN2008800238135A patent/CN101986780A/en active Pending
- 2008-05-09 WO PCT/AU2008/000640 patent/WO2008138037A1/en active Application Filing
- 2008-05-09 EP EP08733458A patent/EP2152489A4/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3257877A (en) * | 1963-07-29 | 1966-06-28 | Reed Roller Bit Co | Power wrenches |
| DE3326591A1 (en) * | 1983-07-23 | 1985-01-31 | Wagner, Paul-Heinz, 5203 Much | Rotary tool |
| US5080180A (en) * | 1988-11-14 | 1992-01-14 | Atlas Copco Tools Ab | Torque impulse power tool |
| EP1157791B1 (en) * | 1995-07-28 | 2007-01-17 | Black & Decker Inc. | Production assembly tool |
| EP0804985A1 (en) * | 1996-04-29 | 1997-11-05 | Black & Decker Inc. | Hand held motorised tool with over-moulded cover |
| US20020096341A1 (en) * | 2001-01-23 | 2002-07-25 | Hagan Todd A. | Housing with functional overmold |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2152489A1 (en) | 2010-02-17 |
| WO2008138037A1 (en) | 2008-11-20 |
| EP2152489A4 (en) | 2011-06-15 |
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Application publication date: 20110316 |