CN104260032A - Improved electric screwdriver - Google Patents

Improved electric screwdriver Download PDF

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Publication number
CN104260032A
CN104260032A CN201410330655.5A CN201410330655A CN104260032A CN 104260032 A CN104260032 A CN 104260032A CN 201410330655 A CN201410330655 A CN 201410330655A CN 104260032 A CN104260032 A CN 104260032A
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CN
China
Prior art keywords
housing
gearbox
temperature
motor
cabinet
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Granted
Application number
CN201410330655.5A
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Chinese (zh)
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CN104260032B (en
Inventor
翁磊
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Zhejiang Minglei lithium energy technology Co., Ltd
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ZHEJIANG MINGLEI TOOLS INDUSTRY Co Ltd
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Priority to CN201410330655.5A priority Critical patent/CN104260032B/en
Publication of CN104260032A publication Critical patent/CN104260032A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/18Devices for illuminating the head of the screw or the nut
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION 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
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION 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
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02Construction of casings, bodies or handles
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent

Abstract

The invention belongs to the technical field of electric tools, and relates to an improved electric screwdriver. The improved electric screwdriver comprises a back casing, and a front casing in hinged connection to the front end of the back casing, wherein a gearbox shell made of an aluminum-silicon-copper cast aluminum alloy is mounted at the front end of the front casing; the aluminum-silicon-copper cast aluminum alloy consists of the following components in percentage by mass: 11.0-13.0% of Si, 1.3-2.5% of Cu, Mg not higher than 0.3%, Mn not higher than 0.5%, 0.8-1.0% of Fe, Zn not higher than 0.5%, 0.2-0.5% of Sn, 0.02-0.08% of Ni, Pb not higher than 0.20%, 0.12-0.16% of Ti, and the balance of aluminum; a power supply, a starting switch and an illuminating module are mounted in the back casing; and a gearbox assembly and a motor are mounted in a closed space formed by the front casing and the gearbox shell. The electric screwdriver has the advantages of stable performance, high flexibility and high hardness.

Description

A kind of improved electric screwdriver
Technical field
The invention belongs to electric tool technical field, relate to a kind of improved electric screwdriver.
Background technology
Electric screw driver is the electric tool for tightening and unscrew screw (screw), is mainly used in assembly line, and it can force screw in place or make screw depart from frock position, is one of instrument of most of manufacturing enterprise indispensability.The instrument that electric screw driver often uses when being also electrical maintenance operation, because screw has various style, as flat mouth screw, cross mouth screw etc., electric screw driver can assemble the screwdriver bit of various style, uses to coordinate different screws.
In prior art, most electric screwdriver structure design comparison is simple, volume is larger, internal structure is fixing not firm, rocking easily appears in inside in the course of the work, affect operating efficiency, and existing electric screw driver generally cannot operation in narrow space environment, to use and inconvenient.
In sum, for solving the deficiency on existing electric screwdriver structure, need to design that a kind of volume is little, compact conformation, improved electric screwdriver easy to use.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose that a kind of volume is little, compact conformation, improved electric screwdriver easy to use.
Object of the present invention realizes by following technical proposal: a kind of improved electric screwdriver, comprise back cabinet and be articulated and connected at the front housing of back cabinet front end by rotating shaft, described front housing is formed by the first housing and the second housing fastening and mmi machine shell front end is provided with the obtained transmission housing of Al-Si-Cu-based Birmasil, described transmission housing nose threads is connected with moment cover, described back cabinet is fastened by the 3rd housing and the 4th housing and is formed, described Al-Si-Cu-based Birmasil is grouped into by the one-tenth of following mass percent: Si:11.00%-13.00%, Cu:1.30%-2.50%, Mg≤0.30%, Mn :≤0.50%, Fe:0.80%-1.00%, Zn :≤0.50%, Sn:0.20%-0.50%, Ni:0.02%-0.08%, Pb≤0.20%, Ti:0.12%-0.16%, individual event impurity content≤0.03% in other impurity elements, impurity element total content≤0.1%, surplus is aluminium, described rotating shaft is successively through the 3rd housing, first housing, second housing, 4th housing, described rotating shaft one end is provided with leaning seat, the other end is fixed with rotary knob and is provided with rotating shaft spring between rotary knob and leaning seat, in back cabinet, power supply is installed, starting switch and light fixture, described starting switch is embedded in the middle part of back cabinet, the outer surface of the 3rd housing is embedded with electric quantity display plate and electric quantity display plate is covered with electricity display lid, described electric quantity display plate is connected with power electric and forms closed-loop path, described light fixture comprises illuminating lamp, luminous lamp switch and the illuminating lamp button be connected with luminous lamp switch, described illuminating lamp to be embedded on the outer surface of the 3rd housing and illuminating lamp is covered with lampshade, described illuminating lamp, luminous lamp switch, power electric connects and forms closed-loop path, in the confined space that mmi machine shell and transmission housing are formed, transmission assembly is installed, there is the motor of motor output shaft, described transmission assembly is arranged between transmission housing and motor, the outer surface of the 4th housing is embedded with relay indicating light, described motor, starting switch, relay indicating light, power electric connects and forms closed-loop path, described motor is installed in front housing by motor sheath, the end of described motor output shaft is fixed with motor gear, described transmission assembly comprises power transmission shaft, primary planet carrier, self-locking centre frame, ring gear, described primary planet carrier is inserted with three primary planet pinions be uniformly distributed circumferentially, described self-locking centre frame is inserted with three secondary planetary gears be uniformly distributed circumferentially, with three primary planet pinions while of described ring gear, the outer peripheral face of three secondary planetary gears is connected with a joggle, the inner peripheral surface of described motor gear and three primary planet pinions is connected with a joggle, described power transmission shaft is located in front housing, described power transmission shaft one end has screwdriver bit installing hole and stretches out outside moment cover, the other end is connected by self-locking ring and self-locking centre frame, described power transmission shaft, primary planet carrier, self-locking centre frame, motor output shaft is coaxially arranged.
In the Al-Si-Cu-based casting alloy that transmission housing is used, Zn, Mg, Cu solid solubility in Al is large, be secondly Mn, Si, Ti, and the solid solubility of Fe is very little, so in the aluminium alloy that gearbox body of the present invention is used, Zn, Mg, Cu can as heat treatment reinforcement elements.Si forms binary or multi-element eutectic tissue in the alloy, puies forward heavy alloyed casting character, improves liquidity, and reduces hot cracking tendency, less shrinkage porosite, improves air-tightness, makes the gearbox body dense structure obtained.And silicon content is more than Al-Si eutectic point, the particle of silicon can significantly improve the wearability of alloy.When silicone content is 11.00-13.00%, then adds the elements such as a certain amount of Ni, Cu, Mg and can produce the comprehensive mechanical property that good synergy improves its transmission housing, and make its lighter weight.Copper can improve normal temperature and the high-temperature behavior of Birmasil, Mg and Si forms Mg2Si precipitated phase through heat treatment reinforcement.When Fe content is lower, Mg and Si still forms Mg2Si phase; When increasing containing Fe amount, Al-Fe-Si-Mg compound can be formed, the illeffects of Fe phase can be suppressed, thus reduce the harm of Fe, effectively put forward heavy alloyed performance.When Mg and Cu conbined usage, can further improve the heat resistance of alloy.And the existence of Zn can improve dissolution velocity and the solubility of Cu, put forward heavy alloyed plasticity.In addition, when the content of copper is in the scope of 1.30%-2.50%, in alloy, the form of all right a small amount of eutectic (α+CuAl2) exists, and improves the mobility of aluminium alloy.Because the content of copper is higher, therefore allow suitably to improve the good Zn content of mobility.And Fe can form thick needle-like or the compound of sheet in aluminium alloy, fall low-alloyed mechanical performance, but in press casting procedure, in order to reduce the adhesion of aluminium alloy to mould, in Al-Si-Cu-based alloy, preferably there is a certain amount of ferro element.For reducing the adverse effect of iron, manganese element within a small amount of 0.5% can be added and iron neutralizes, the crystal shape of iron in alloy is become fine and closely woven crystal shape from sheet or needle-like, form Al-Si-Fe-Mn phase that is circular or Chinese character shape, reduce the illeffects of Fe, put forward heavy alloyed creep rupture strength and hardness.
The present invention is also added with a small amount of antimony element as alterant element to improve the metallographic structure of aluminium alloy, and Ti forms tiny compound in this aluminium alloy, as the crystallization nuclei of aluminium solid solution, has the effect of strong refinement aluminium solid solution crystal grain.Due to the refinement of aluminium solid solution, make the also refinement thereupon of crystal boundary and interdendritic compound, thus put forward the mechanical performance of heavy alloyed thermal effectiveness and alloy.
Gearbox body of the present invention aluminium alloy used with the addition of Ti, Pb element on the basis of ADC12 alloy, improve the content of Si, Cu element, and further define the content of Fe, Ni, Sn element, make it have excellent fillibility and high intensity, it is made to be applied on electric screw driver, stable performance, hardness is large, and then improves practicality and the service life of electric screw driver.
Wherein, the processing technology of described gearbox body comprises the steps:
S1, according to the constituent of above-mentioned gearbox body Al-Si-Cu-based alloy and mass percent batching thereof, first add the aluminium ingot of half, copper, manganese and remaining aluminium ingot is added after aluminium ingot melts completely, after copper and manganese melt completely, adjust temperature of aluminum liquid be pressed into magnesium sheet to during 710-740 DEG C, the aluminium liquid after melting is stirred;
S2, the filtrate after melting is successively carried out removing the gred and refinery by de-gassing, mould is first carried out preheating simultaneously, then aluminium hydraulic pressure is cast gearbox body blank, cast temperature is 620-670 DEG C, injection pressure is 60-80MPa, and mold temperature is 550-600 DEG C, and open time is 150-230s;
S3, to cast after gearbox body blank heat-treat, heat treatment comprises solution treatment and Ageing Treatment, wherein solid solution temperature is 500-550 DEG C, be incubated and carry out Quenching Treatment immediately after 3-8 hour, artificial aging treatment temperature is 150-200 DEG C, is incubated and naturally cools to obtain gearbox body after 5-12 hour.
The object of the solution treatment described in step S3 mainly solution modeling phase again, forming supersaturated solid solution is that the Ageing Treatment of alloy is prepared.And the principal element affecting solution treatment has heating-up temperature, temperature retention time and cooling velocity.Heating-up temperature is higher, and temperature retention time is longer, and the distribution of alloying element in lattice is more even, can promote the raising of timeliness effect.And Ageing Treatment is the process of an age-hardening, its essence is that Segregation solute atom forms the result of harden zone.Aluminium alloy forms room after Quench heating, and in quenching process, the excessive velocities due to cooling makes these rooms have little time to shift out and combines with solute atoms.And the existence in room and supersaturated solid solution accelerate the diffusion velocity of solute atoms to the transformation of poised state from labile state, thus accelerate the segregation of solute atoms.And age-hardening is a very complicated process, it not only depends on that the composition of alloy also depends on temperature in ag(e)ing process and temperature retention time.
In the processing technology of above-mentioned gearbox body, the smelting temperature described in step S1 is 700-760 DEG C.
In the processing technology of above-mentioned gearbox body, the refining temperature described in step S2 is 720-760 DEG C.Refining agent used is carbon trichloride.
In the processing technology of above-mentioned gearbox body, extrusion process described in step S2 adopts intermediate annealing, namely after injection 1000-3000 time, anneals; After injection 5000 times, then anneal; Again after injection 10000 times, anneal again; Injection 20000-30000 time again, annealing process is 520-550 DEG C, annealing 5h.In the Die Casting process of gearbox body, under mould is not only in high temperature, and variations in temperature is large, adopts intermediate annealing process simultaneously, can eliminate internal stress, stablize the size of shaping gearbox body.
In the processing technology of above-mentioned gearbox body, the water temperature of Quenching Treatment described in step S3 is 60-70 DEG C.
Wherein, described copper and magnesium add with simple metal.
In above-mentioned a kind of improved electric screwdriver, the lateral surface of described first housing, the second housing, the 3rd housing, the 4th housing all offers some air vents be obliquely installed.
In above-mentioned a kind of improved electric screwdriver, the outer surface of back cabinet is evenly coated with fluorescence coating.
In above-mentioned a kind of improved electric screwdriver, the outer surface of described first housing, the second housing, the 3rd housing, the 4th housing is provided with some anti-skidding projections.
Compared with prior art, integral structure layout of the present invention is reasonable, and volume is little; Each parts inner are installed compact, fixed, make electric screw driver not easily occur rocking in inside in the course of the work, ensure that operating efficiency; The aluminium alloy reasonable compatibility that gearbox body adopts, makes it have excellent fillibility and high intensity, makes it be applied on electric screw driver, stable performance, and hardness is large, and then improves practicality and the service life of electric screw driver; And back cabinet and front housing are articulated and connected, can rotate back cabinet and front housing up and down according to different demand, to meet the demand of different work environment, flexibility is large and versatility is wide, uses also more convenient; The structural design of illuminating lamp and luminous lamp switch is simple, can provide light for operating personnel under comparatively dim environment, convenient and practical.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the present invention.
Fig. 2 be in a preferred embodiment of the present invention front housing be separated with back cabinet after structural representation.
Fig. 3 is the explosive view of a preferred embodiment of the present invention.
Fig. 4 is the structural representation of back cabinet in a preferred embodiment of the present invention.
Fig. 5 is the structural representation of front housing in a preferred embodiment of the present invention.
Fig. 6 is the structural representation of transmission housing in a preferred embodiment of the present invention.
Fig. 7 is the structural representation of light fixture in a preferred embodiment of the present invention.
Fig. 8 is the structural representation of transmission assembly in a preferred embodiment of the present invention.
In figure, 10, back cabinet; 11, the 3rd housing; 12, the 4th housing; 21, rotating shaft; 211, leaning seat; 22, rotary knob; 23, rotating shaft spring; 30, front housing; 31, the first housing; 32, the second housing; 33, anti-skidding projection; 41, transmission housing; 42, transmission assembly; 421, power transmission shaft; 422, primary planet carrier; 423, self-locking centre frame; 424, ring gear; 425, primary planet pinion; 426, secondary planetary gear; 427, self-locking ring; 50, moment cover; 60, power supply; 71, starting switch; 72, relay indicating light; 80, light fixture; 81, illuminating lamp; 82, luminous lamp switch; 83, illuminating lamp button; 84, lampshade; 91, electric quantity display plate; 92, electricity display lid; 101, motor; 1011, motor gear; 102, motor sheath.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figures 1 to 8, this improved electric screwdriver comprises back cabinet 10 and is articulated and connected at the front housing 30 of back cabinet 10 front end by rotating shaft 21, front housing 30 is fastened by the first housing 31 and the second housing 32 and to be formed and mmi machine shell 30 front end is provided with transmission housing 41, transmission housing 41 nose threads is connected with moment cover 50, back cabinet 10 is fastened by the 3rd housing 11 and the 4th housing 12 and is formed, rotating shaft 21 is successively through the 3rd housing 11, first housing 31, second housing 32, 4th housing 12, rotating shaft 21 one end is provided with leaning seat 211, the other end is fixed with rotary knob 22 and is provided with rotating shaft spring 23 between rotary knob 22 and leaning seat 211, power supply 60 is installed in back cabinet 10, starting switch 71 and light fixture 80, starting switch 71 is embedded in the middle part of back cabinet 10, the outer surface of the 3rd housing 11 is embedded with electric quantity display plate 91 and electric quantity display plate 91 is covered with electricity display lid 92, electric quantity display plate 91 is electrically connected with power supply 60 and forms closed-loop path, light fixture 80 comprises illuminating lamp 81, luminous lamp switch 82 and the illuminating lamp button 83 be connected with luminous lamp switch 82, illuminating lamp 81 to be embedded on the outer surface of the 3rd housing 11 and illuminating lamp 81 is covered with lampshade 84, illuminating lamp 81, luminous lamp switch 82, power supply 60 is electrically connected and forms closed-loop path, in the confined space that mmi machine shell 30 and transmission housing 41 are formed, transmission assembly 42 is installed, there is the motor 101 of motor output shaft, transmission assembly 42 is arranged between transmission housing 41 and motor 101, the outer surface of the 4th housing 12 is embedded with relay indicating light 72, motor 101, starting switch 71, relay indicating light 72, power supply 60 is electrically connected and forms closed-loop path, motor 101 is installed in front housing 30 by motor sheath 102, the end of motor output shaft is fixed with motor gear 1011, transmission assembly 42 comprises power transmission shaft 421, primary planet carrier 422, self-locking centre frame 423, ring gear 424, primary planet carrier 422 is inserted with three primary planet pinions be uniformly distributed circumferentially 425, self-locking centre frame 423 is inserted with three secondary planetary gears be uniformly distributed circumferentially 426, with three primary planet pinions 425 while of ring gear 424, the outer peripheral face of three secondary planetary gears 426 is connected with a joggle, the inner peripheral surface of motor gear 1011 and three primary planet pinions 425 is connected with a joggle, power transmission shaft 421 is located in front housing 30, power transmission shaft 421 one end has screwdriver bit installing hole and stretches out outside moment cover 50, the other end is connected by self-locking ring 427 and self-locking centre frame 423, power transmission shaft 421, primary planet carrier 422, self-locking centre frame 423, motor output shaft is coaxially arranged.
It is worth mentioning that, motor sheath 102 pairs of motors 101 play the firm effect of clamping, make electric screw driver stable working, improve operating efficiency and the service life of equipment.
In an initial condition, integral structure layout is reasonable, and volume is little for this improved electric screwdriver; Each parts inner are installed compact, fixed, make electric screw driver not easily occur rocking in inside in the course of the work, ensure that operating efficiency; And back cabinet 10 and front housing 30 are articulated and connected, back cabinet 10 and front housing 30 can be rotated up and down according to different demand, the angle between back cabinet 10 and front housing 30 is changed, to meet the demand of different work environment, flexibility is large and versatility is wide, uses also more convenient.
Rotating shaft 21, rotary knob 22 and rotating shaft spring 23 constitute rotary components, and front housing 30 and back cabinet 10 are articulated and connected closely.When needing to regulate the angle between front housing 30, back cabinet 10 (when needing to rotate front housing 30 to meet different work environmental demand), rotary knob 22 can be rotated and then driven rotary axle 21 rotates, finally achieve relatively rotating between front housing 30 and back cabinet 10, make this electric screw driver can present difform change, easy to use.Wherein, rotating shaft 21 one end is provided with leaning seat 211 and is provided with rotating shaft spring 23 between rotary knob 22 and leaning seat 211, the two ends of rotating shaft spring 23 apply extrapolability to rotating shaft 21, leaning seat 211 simultaneously, make rotating shaft 21, leaning seat 211 is unlikely to stuck, make front housing 30, back cabinet 10 rotate more flexible, reasonable in design and install, dismounting is all more convenient.
In the present invention, it is inner that power supply 60 is built in back cabinet 10, and back cabinet 10 serves storing and storage line function, avoids outside lines excessively random, offers convenience to telecommute.
Wherein, the using method of starting switch 71 is: when user holds back cabinet 10 with palm, and finger pins starting switch 71 simultaneously, and make home loop conducting, this electric screw driver is started working, reasonable in design and simple to operate.In addition; electric quantity display plate 91 is connected with power supply 60, and energy is display power supply 60 electricity in time, is convenient to user and observes and charge to electric screw driver in time; and on electric quantity display plate 91, be covered with the electricity display lid 92 playing protection, dustproof effect, reasonable in design and easy for installation.
Illuminating lamp 81 is reasonable in design, can provide light for operating personnel under comparatively dim environment, convenient and practical.In addition; illuminating lamp 81 matches with illuminating lamp button 83; only need to press illuminating lamp button 83 when needs use and can light illuminating lamp 81; illuminating lamp 81 is also covered with the lampshade 84 playing protection, decoration function; lampshade 84 also can be designed as the coloured transparent body of band, and the light that illuminating lamp 81 is irradiated can present the color of applicable working environment or protection eyes.
In the present invention, transmission assembly 42 comprises two groups of speed change assemblies, reasonable in design, and each parts layout is tight, and transmission assembly 42 can realize multi-change speed, and operating efficiency is high.Under original state, the screwdriver bit of screwdriver is contained in screwdriver bit installing hole, and structure is simple and frock is convenient.The driving force of motor 101 is sent on power transmission shaft 421 by transmission assembly 42, in the course of work, motor 101 synchronously drives power transmission shaft 421 to rotate, and then turning cylinder drives screwdriver bit work, makes electric screw driver realize forcing screw in place, makes screw depart from the functions such as frock position.
Relay indicating light 72 plays indicative function at work, when electric screw driver carries out operation, can point out the duty of operator's electric screw driver, facilitates operator and carries out operation, improve operating efficiency.
Preferably, the lateral surface of the first housing 31, second housing 32, the 3rd housing 11, the 4th housing 12 all offers multiple air vent be obliquely installed.In the present invention, the Position Design of air vent general when electric screw driver work sites of heat generation, the heat that air vent makes inner body distribute can be diffused into the external world in time, avoid motor 101 or transmission assembly 42 overheated and burn the generation of phenomenon.
Further, the outer surface of the first housing 31, second housing 32, the 3rd housing 11, the 4th housing 12 is provided with multiple anti-skidding protruding 33.In the present invention, anti-skidding protruding 33 can be chosen as strip projected parts or point-like projection, anti-skidding protruding 33 intensity and the comforts adding front housing 30 (back cabinet 10), when this electric screw driver works, the feel held is more comfortable and assurance is more firm, reasonable in design, improve the service life of operating efficiency and electric screw driver.
Further, the outer surface of back cabinet 10 is evenly coated with fluorescence coating, when power-off or light dark also can see the position at this electric screw driver place, structure is simple and easy to process, avoids user's electric screw driver of stumbling that the events such as scratch occur.
Wherein, described transmission housing is obtained by Al-Si-Cu-based Birmasil, described Al-Si-Cu-based Birmasil is grouped into by the one-tenth of following mass percent: Si:11.00%-13.00%, Cu:1.30%-2.50%, Mg≤0.30%, Mn :≤0.50%, Fe:0.80%-1.00%, Zn :≤0.50%, Sn:0.20%-0.50%, Ni:0.02%-0.08%, Pb≤0.20%, Ti:0.12%-0.16%, individual event impurity content≤0.03% in other impurity elements, impurity element total content≤0.1%, surplus is aluminium.
Table 1: embodiment 1-3 is for the preparation of the constituent of transmission housing and mass percent thereof
Embodiment 1
According to constituent and the mass percent batching thereof of gearbox body Al-Si-Cu-based alloy described in table 1 embodiment 1, first add the aluminium ingot of half, copper, manganese and remaining aluminium ingot is added after aluminium ingot melts completely at 700 DEG C, be pressed into magnesium sheet when adjusting temperature of aluminum liquid to 710 DEG C after copper and manganese melt completely, the aluminium liquid after melting is stirred;
Filtrate after melting is successively carried out removing the gred and refinery by de-gassing, refining temperature is 720 DEG C, refining agent is carbon trichloride, mould is first carried out preheating simultaneously, again aluminium hydraulic pressure is cast gearbox body blank, cast temperature is 620 DEG C, and injection pressure is 60MPa, mold temperature is 550 DEG C, and open time is 150s; Wherein extrusion process adopts intermediate annealing, namely after injection 1000 times, anneals; After injection 5000 times, then anneal; Again after injection 10000 times, anneal again, then injection 20000 times; Annealing process is 520 DEG C, annealing 5h;
Gearbox body blank after cast is heat-treated, heat treatment comprises solution treatment and Ageing Treatment, wherein solid solution temperature is 520 DEG C, be incubated and carry out Quenching Treatment immediately after 6 hours, quenching water temperature is 60 DEG C, artificial aging treatment temperature is 170 DEG C, is incubated and naturally cools to obtain gearbox body finished product after 5 hours.
Embodiment 2
According to constituent and the mass percent batching thereof of gearbox body Al-Si-Cu-based alloy described in table 1 embodiment 2, first add the aluminium ingot of half, copper, manganese and remaining aluminium ingot is added after aluminium ingot melts completely at 730 DEG C, be pressed into magnesium sheet when adjusting temperature of aluminum liquid to 725 DEG C after copper and manganese melt completely, the aluminium liquid after melting is stirred;
Filtrate after melting is successively carried out removing the gred and refinery by de-gassing, refining temperature is 740 DEG C, refining agent is carbon trichloride, mould is first carried out preheating simultaneously, again aluminium hydraulic pressure is cast gearbox body blank, cast temperature is 640 DEG C, and injection pressure is 70MPa, mold temperature is 575 DEG C, and open time is 190s; Wherein extrusion process adopts intermediate annealing, namely after injection 2000 times, anneals; After injection 5000 times, then anneal; Again after injection 10000 times, anneal again, then injection 25000 times; Annealing process is 535 DEG C, annealing 5h;
Gearbox body blank after cast is heat-treated, heat treatment comprises solution treatment and Ageing Treatment, wherein solid solution temperature is 500 DEG C, be incubated and carry out Quenching Treatment immediately after 4 hours, quenching water temperature is 65 DEG C, aging temperature is 150 DEG C, is incubated and naturally cools to obtain gearbox body finished product after 10 hours.
Embodiment 3
According to constituent and the mass percent batching thereof of gearbox body Al-Si-Cu-based alloy described in table 1 embodiment 3, first add the aluminium ingot of half, copper, manganese and remaining aluminium ingot is added after aluminium ingot melts completely at 760 DEG C, be pressed into magnesium sheet when adjusting temperature of aluminum liquid to 740 DEG C after copper and manganese melt completely, the aluminium liquid after melting is stirred;
Filtrate after melting is successively carried out removing the gred and refinery by de-gassing, refining temperature is 760 DEG C, refining agent is carbon trichloride, mould is first carried out preheating simultaneously, again aluminium hydraulic pressure is cast gearbox body blank, cast temperature is 670 DEG C, and injection pressure is 80MPa, mold temperature is 600 DEG C, and open time is 230s; Wherein extrusion process adopts intermediate annealing, namely after injection 3000 times, anneals; After injection 5000 times, then anneal; Again after injection 10000 times, anneal again, then injection 30000 times; Annealing process is 550 DEG C, annealing 5h;
Gearbox body blank after cast is heat-treated, heat treatment comprises solution treatment and Ageing Treatment, wherein solid solution temperature is 550 DEG C, be incubated and carry out Quenching Treatment immediately after 8 hours, quenching water temperature is 70 DEG C, aging temperature is 200 DEG C, is incubated and naturally cools to obtain gearbox body finished product after 12 hours.
Gearbox body obtained in embodiment 1-3 is carried out performance test respectively at a room temperature and a high temperature, and test result is as shown in table 2.
The performance test results of the gearbox body that table 2: embodiment of the present invention 1-3 obtains
In sum, gearbox body in electric screw driver of the present invention is selected and is made containing the multiple Al-Si-Cu-based alloy improving the element of alloy fillibility and mechanical property, the basis of ADC12 alloy with the addition of Ti, Pb element, improve the content of Si, Cu element, and further define the content of Fe, Ni, Sn element, gearbox body is made to have excellent fillibility and high intensity, greatly improve the performance of each side, gearbox body is made to be applied on electric screw driver, stable performance, hardness is large, and then improves practicality and the service life of electric screw driver.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Claims (9)

1. an improved electric screwdriver, it is characterized in that, comprise back cabinet and be articulated and connected at the front housing of back cabinet front end by rotating shaft, described front housing is formed by the first housing and the second housing fastening and mmi machine shell front end is provided with the obtained transmission housing of Al-Si-Cu-based Birmasil, described transmission housing nose threads is connected with moment cover, described back cabinet is fastened by the 3rd housing and the 4th housing and is formed, described Al-Si-Cu-based Birmasil is grouped into by the one-tenth of following mass percent: Si:11.00%-13.00%, Cu:1.30%-2.50%, Mg≤0.30%, Mn :≤0.50%, Fe:0.80%-1.00%, Zn :≤0.50%, Sn:0.20%-0.50%, Ni:0.02%-0.08%, Pb≤0.20%, Ti:0.12%-0.16%, individual event impurity content≤0.03% in other impurity elements, impurity element total content≤0.1%, surplus is aluminium, described rotating shaft is successively through the 3rd housing, first housing, second housing, 4th housing, described rotating shaft one end is provided with leaning seat, the other end is fixed with rotary knob and is provided with rotating shaft spring between rotary knob and leaning seat, in back cabinet, power supply is installed, starting switch and light fixture, described starting switch is embedded in the middle part of back cabinet, the outer surface of the 3rd housing is embedded with electric quantity display plate and electric quantity display plate is covered with electricity display lid, described electric quantity display plate is connected with power electric and forms closed-loop path, described light fixture comprises illuminating lamp, luminous lamp switch and the illuminating lamp button be connected with luminous lamp switch, described illuminating lamp to be embedded on the outer surface of the 3rd housing and illuminating lamp is covered with lampshade, described illuminating lamp, luminous lamp switch, power electric connects and forms closed-loop path, in the confined space that mmi machine shell and transmission housing are formed, transmission assembly is installed, there is the motor of motor output shaft, described transmission assembly is arranged between transmission housing and motor, the outer surface of the 4th housing is embedded with relay indicating light, described motor, starting switch, relay indicating light, power electric connects and forms closed-loop path, described motor is installed in front housing by motor sheath, the end of described motor output shaft is fixed with motor gear, described transmission assembly comprises power transmission shaft, primary planet carrier, self-locking centre frame, ring gear, described primary planet carrier is inserted with three primary planet pinions be uniformly distributed circumferentially, described self-locking centre frame is inserted with three secondary planetary gears be uniformly distributed circumferentially, with three primary planet pinions while of described ring gear, the outer peripheral face of three secondary planetary gears is connected with a joggle, the inner peripheral surface of described motor gear and three primary planet pinions is connected with a joggle, described power transmission shaft is located in front housing, described power transmission shaft one end has screwdriver bit installing hole and stretches out outside moment cover, the other end is connected by self-locking ring and self-locking centre frame, described power transmission shaft, primary planet carrier, self-locking centre frame, motor output shaft is coaxially arranged.
2. a kind of improved electric screwdriver according to claim 1, it is characterized in that, the processing technology of described gearbox body comprises the steps:
S1, according to the constituent of the Al-Si-Cu-based alloy of gearbox body described in claim 1 and mass percent batching thereof, first add the aluminium ingot of half, copper, manganese and remaining aluminium ingot is added after aluminium ingot melts completely, after copper and manganese melt completely, adjust temperature of aluminum liquid be pressed into magnesium sheet to during 710-740 DEG C, the aluminium liquid after melting is stirred;
S2, the filtrate after melting is successively carried out removing the gred and refinery by de-gassing, mould is first carried out preheating simultaneously, then aluminium hydraulic pressure is cast gearbox body blank, cast temperature is 620-670 DEG C, injection pressure is 60-80MPa, and mold temperature is 550-600 DEG C, and open time is 150-230s;
S3, to cast after gearbox body blank heat-treat, heat treatment comprises solution treatment and Ageing Treatment, wherein solid solution temperature is 500-550 DEG C, be incubated and carry out Quenching Treatment immediately after 3-8 hour, artificial aging treatment temperature is 150-200 DEG C, is incubated and naturally cools to obtain gearbox body after 5-12 hour.
3. a kind of improved electric screwdriver according to claim 2, is characterized in that, the smelting temperature described in processing technology step S1 of gearbox body is 700-760 DEG C.
4. a kind of improved electric screwdriver according to claim 2, is characterized in that, the refining temperature described in processing technology step S2 of gearbox body is 720-760 DEG C.
5. a kind of improved electric screwdriver according to claim 2, is characterized in that, the extrusion process described in processing technology step S2 of gearbox body adopts intermediate annealing, namely after injection 1000-3000 time, anneals; After injection 5000 times, then anneal; Again after injection 10000 times, anneal again; Injection 20000-30000 time again, annealing process is 520-550 DEG C, annealing 5h.In the Die Casting process of gearbox body, under mould is not only in high temperature, and variations in temperature is large, adopts intermediate annealing process simultaneously, can eliminate internal stress, stablize the size of shaping gearbox body.
6. a kind of improved electric screwdriver according to claim 2, is characterized in that, described in the processing technology step S3 of gearbox body, the water temperature of Quenching Treatment is 60-70 DEG C.
7. a kind of improved electric screwdriver according to claim 1, is characterized in that, the lateral surface of described first housing, the second housing, the 3rd housing, the 4th housing all offers some air vents be obliquely installed.
8. a kind of improved electric screwdriver according to claim 7, is characterized in that, the outer surface of back cabinet is evenly coated with fluorescence coating.
9. a kind of improved electric screwdriver according to claim 8, is characterized in that, the outer surface of described first housing, the second housing, the 3rd housing, the 4th housing is provided with some anti-skidding projections.
CN201410330655.5A 2014-07-11 2014-07-11 A kind of improved electric screwdriver Active CN104260032B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105364764A (en) * 2015-11-18 2016-03-02 宁波市鄞州永佳电机工具有限公司 Multifunctional screwdriver

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CN201264226Y (en) * 2008-09-04 2009-07-01 常熟市东联电器制造有限责任公司 Electric screwdriver structure with contactless inductive brake
CN201415383Y (en) * 2009-05-22 2010-03-03 深圳市双环全新机电股份有限公司 Electric screwdriver
DE102008041720A1 (en) * 2008-08-29 2010-04-29 Robert Bosch Gmbh Hand tool with brush motor
CN202462310U (en) * 2011-12-20 2012-10-03 宁波市华亿电器有限公司 Electric screwdriver
CN203592441U (en) * 2013-12-19 2014-05-14 宁波甬菲特电子科技有限公司 Electric screwdriver

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Publication number Priority date Publication date Assignee Title
DE102008041720A1 (en) * 2008-08-29 2010-04-29 Robert Bosch Gmbh Hand tool with brush motor
CN201264226Y (en) * 2008-09-04 2009-07-01 常熟市东联电器制造有限责任公司 Electric screwdriver structure with contactless inductive brake
CN201415383Y (en) * 2009-05-22 2010-03-03 深圳市双环全新机电股份有限公司 Electric screwdriver
CN202462310U (en) * 2011-12-20 2012-10-03 宁波市华亿电器有限公司 Electric screwdriver
CN203592441U (en) * 2013-12-19 2014-05-14 宁波甬菲特电子科技有限公司 Electric screwdriver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105364764A (en) * 2015-11-18 2016-03-02 宁波市鄞州永佳电机工具有限公司 Multifunctional screwdriver

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Address before: 315145 Zhejiang city of Ningbo province Yinzhou District Binhai Investment Center East Yin Road No. 188

Patentee before: ZHEJIANG MINGLEI TOOLS INDUSTRY Co.,Ltd.