CN104588727A - Electric drill - Google Patents
Electric drill Download PDFInfo
- Publication number
- CN104588727A CN104588727A CN201410708951.4A CN201410708951A CN104588727A CN 104588727 A CN104588727 A CN 104588727A CN 201410708951 A CN201410708951 A CN 201410708951A CN 104588727 A CN104588727 A CN 104588727A
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- Prior art keywords
- motor
- output shaft
- power output
- stator
- installation portion
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/001—Housing of the drill, e.g. handgrip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/003—Attachments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/008—Gear boxes, clutches, bearings, feeding mechanisms or like equipment
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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
- B25F5/008—Cooling means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention provides an electric drill and belongs to the technical field of electric tools. The electric drill comprises a machine shell, and the machine shell comprises an installation part, a handholding part and a base part. A battery pack is installed below the base part, a switch is installed at the front end of the handholding part, a drill chuck is installed at the front end of the installation part, and a brushless motor is installed in the installation part and is connected with the drill chuck through a gearing-down mechanism. The brushless motor comprises a motor shell and a power output shaft. A stator provided with a winding, a rotor provided with at least one magnet, a Hall plate electrically connected with the stator, and a fan blade arranged near the rear end of the installation part are installed in the motor shell. The power output shaft is fixedly connected with the rotor, the power output shaft partly extends out of the motor shell and is connected with the gearing-down mechanism, a plurality of ventilation notches are formed in the motor shell, a plurality of ventilation grooves are formed in the machine shell, and a ventilation channel is formed in the machine shell. The electric drill has the advantages of being reasonable in layout, long in service life and good in radiating effect.
Description
Technical field
The invention belongs to electric tool technical field, relate to a kind of electric drill.
Background technology
Electric drill utilizes electricity to do the drilling machine of power, is the conventional products in electric tool, is also the maximum electric tool series products of market demand amount.Electric drill can be applicable to the use occasions such as building, finishing, family expenses, medical treatment, can be used for scraping material surface or pierce object.
The operation principle of electric drill is that the rotor of electromagnetic rotating formula or electromagnetic reciprocating low capacity motor does magnetic field intercepts acting running, by actuator drives apparatus for work, makes drill bit pierce object better.
In prior art, electric drill layout is unreasonable, employing be brush motor, its inside is provided with carbon brush, after long-term use, needs to open motor to clear up carbon brush, wastes time and energy, safeguard that intensity is large.And after Long-Time Service, carbon brush is subject to constantly friction and makes carbon brush Fast Wearing, makes reduce the service life of motor, also reduce the service life of electric drill, brush motor in use generates heat comparatively large, and power output is less, affects the normal work of overall electric drill.
In addition, the brush motor of existing electric drill is generally arranged on electric drill machine shell back-end location, corresponding offers louvre at casing rear end, but electric drill design is unreasonable, louvre and brush motor coordinate not good, and cause the inner superfluous heat of electric drill to exhale, particularly motor place easily produces superheating phenomenon, so just easily burn out parts, affect the service life of electric drill.
In sum, for solving existing electric drill Problems existing, need the electric drill designing a kind of rationally distributed, long service life, excellent in heat dissipation effect.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of electric drill of rationally distributed, long service life, excellent in heat dissipation effect.
Object of the present invention realizes by following technical proposal: a kind of electric drill, comprise casing, described casing comprises the installation portion set gradually, hand grip portion, base portion, below base portion, power brick is installed, in hand grip portion front end, switch is installed, the drill chuck with drill bit installing hole is installed in installation portion front end, in installation portion, brushless electric machine is installed and brushless electric machine is connected with drill chuck by reduction gearing mechanism, described power brick, switch, brushless electric machine three is electrically connected, described brushless electric machine comprises motor housing and power output shaft, the stator being provided with winding is installed in motor housing, be provided with the rotor of at least one magnet, the Hall Plate be electrically connected with stator, arrange and the fan blade be set on power output shaft near installation portion rear end, described power output shaft and rotor are connected, it is outer and be connected with reduction gearing mechanism that described Power output shaft portion stretches out motor housing, motor housing offers the some ventilation breach that arrange corresponding to fan blade, casing offers the some ventilation slots being extended to installation portion rear end by hand grip portion rear end, be provided with in casing and each ventilation breach, the vent passages of the equal UNICOM of each ventilation slot, described fan blade can drive external air flow first to enter vent passages by the ventilation slot of hand grip portion rear end, flowed out outside casing by the ventilation slot of installation portion rear end again.
As a further improvement on the present invention, described casing is fastened by left casing, right casing and rear chassis and forms, described ventilation slot is made up of the little V-shaped groove of the multiple row being opened in hand grip portion rear end, the large V-shaped groove of multirow being opened in installation portion side, some rear venting grooves of being opened in installation portion rear end, described large V-shaped groove, little V-shaped groove half are opened on left casing, second half is opened on right casing, and each rear venting groove is all opened on rear chassis.
As a further improvement on the present invention, described winding is plugged on stator, and described rotor is located in the middle part of stator, and described magnet is that tabular is arranged, and described magnet quantity is four and four each magnet are circumferentially evenly arranged on rotor.
As a further improvement on the present invention, described motor housing is fastened by motor fore shell and motor back cover and forms, motor fore shell and motor back cover all offer ventilation breach, described stator is installed in the middle part of motor housing, described Hall Plate is arranged between stator and motor fore shell, described Power output shaft rear end is movably arranged in the middle part of motor back cover by rear ball bearing, be connected with rotor in the middle part of described power output shaft, described power output shaft front end is flexibly connected with motor fore shell by front ball bearing, described power output shaft front end through Hall Plate and part to stretch out motor housing outer and be connected with reduction gearing mechanism.
As a further improvement on the present invention, described fan blade is arranged between motor back cover and stator, described fan blade is connected with seal stator by seal cover, be provided with projection in the middle part of the outer face that described fan blade faces motor fore shell, be tightly connected with seal cover, power output shaft in the middle part of described protruding embedding sealing lid.
As a further improvement on the present invention, be provided with the gland be set in outside power output shaft between motor fore shell and stator, described gland to be located in Hall Plate and to be connected with motor fore shell, seal stator.
As another improvement of the present invention, described brushless electric machine is arranged in installation portion by electric motor end cap, described power output shaft front end is fixed with motor gear, described drill chuck is arranged on installation portion front end by moment cover, described reduction gearing mechanism comprises power transmission shaft, gearbox fore shell, gearbox back cover, stir gear ring, ring gear, described gearbox fore shell and gearbox back cover are connected and form gearbox body and gearbox body is arranged in installation portion, described gearbox body is arranged between moment cover and brushless electric machine, the first speed change assembly is provided with in described gearbox body, second speed change assembly, 3rd speed change assembly, described first speed change assembly comprises primary planet carrier and three primary planet pinions be circumferentially evenly plugged on primary planet carrier, described second speed change assembly comprises secondary planet frame and five secondary planetary gears be circumferentially evenly plugged on secondary planet frame, described stir gear ring simultaneously with three primary planet pinions, the outer peripheral face of five secondary planetary gears is connected with a joggle, described motor gear is connected with a joggle with the inner peripheral surface of three primary planet pinions simultaneously, described 3rd speed change assembly comprises self-locking planet carrier and five three-stage planetary gear be circumferentially evenly plugged on self-locking planet carrier, described ring gear is connected with a joggle with the outer peripheral face of five three-stage planetary gear simultaneously, be installed with in the middle part of described secondary planet frame and connect gear and the inner peripheral surface connecting gear and five three-stage planetary gear is connected with a joggle, described power transmission shaft one end is overlapped through moment and is connected with drill chuck, the other end is passed gearbox body and is connected by self-locking mechanism and self-locking planet carrier, described power transmission shaft, primary planet carrier, secondary planet frame, self-locking planet carrier, power output shaft is coaxially arranged.
As a further improvement on the present invention, described self-locking mechanism comprise be installed in the middle part of self-locking planet carrier from lock core, to be connected with from lock core and to be fastened on the self-locking ring on self-locking planet carrier, described power transmission shaft is through self-locking ring and be connected with from lock core.
As a further improvement on the present invention, be provided with in installation portion and the flip stand stirred gear ring and be connected, installation portion is movably installed with the selector button be connected with flip stand, be installed with equipment gear in the middle part of described primary planet carrier and the inner peripheral surface of equipment gear and five secondary planetary gears is connected with a joggle, described selector button can drive flip stand horizontal sliding and related gear ring of stirring engages with primary planet pinion outer peripheral face or departs from.
As a further improvement on the present invention, moment pad and inner ring is provided with in moment cover, described moment pad and gearbox fore shell are tightly connected, between moment pad and inner ring, be provided with moment spring, described power transmission shaft is also flexibly connected with inner ring by least one forceball bearing through moment pad.
As a further improvement on the present invention, be also provided with and can control the push rod of brushless electric machine rotating and the two ends of push rod are each passed through left casing and right casing in the middle part of hand grip portion, described push rod, brushless electric machine, switch, power brick are electrically connected.
As a further improvement on the present invention, compensation gear ring is also provided with stirring on gear ring.
As a further improvement on the present invention, left casing and right casing are equipped with labeling fastener.
As a further improvement on the present invention, base portion is also provided with belt fastener.
Based on technique scheme, the embodiment of the present invention at least can produce following technique effect:
1, integral layout is reasonable, and selection of Motor is brushless electric machine, and its inside eliminates carbon brush, during motor rotation, frictional force reduces greatly, run smooth and easy, noise can be much lower, and non-carbonate design makes the wearing and tearing of brushless electric machine mainly produce on bearing, from mechanical angle, brushless electric machine has been almost a kind of non-maintaining motor, time necessary, only need do some dedustings and safeguard, extend the service life of brushless electric machine, also make be protected the service life of electric drill.
2, fan blade, ventilation breach, ventilation slot coordinate closely, in the electric drill course of work, fan blade rotates the absorption affinity produced and drives external air flow to be first inhaled into electric drill machine shell inside by the ventilation slot of hand grip portion rear end, flow out outside casing by the ventilation slot of installation portion rear end again, external air flow by the migration of casing lower end in the process of upper end, the heat that each parts inner produce is siphoned away, makes the heat given out in electric drill to flow out outside casing in time, radiating effect is desirable, improves the service life of electric drill.
3, reduction gearing mechanism comprises three groups of speed change assemblies, reasonable in design, each parts layout is tight and fixed, makes electric drill not easily occur rocking in inside in the course of the work, reduction gearing mechanism can realize three grades or level Four speed change, improves operating efficiency further.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:
Fig. 1 is the structural representation of a preferred embodiment of the present invention.
Fig. 2 is the structural representation at another visual angle of Fig. 1.
Fig. 3 be in Fig. 2 A-A to sectional view.
Fig. 4 is the explosive view of a preferred embodiment of the present invention.
Fig. 5 is the structural representation of brushless electric machine in a preferred embodiment of the present invention.
Fig. 6 is the structural representation at another visual angle of Fig. 5.
Fig. 7 is the explosive view of brushless electric machine in a preferred embodiment of the present invention.
Fig. 8 is the structural representation at another visual angle of Fig. 6.
Fig. 9 be in Fig. 8 B-B to sectional view.
Figure 10 is the structural representation of power brick in a preferred embodiment of the present invention.
Figure 11 is the explosive view of power brick in a preferred embodiment of the present invention.
Figure 12 is the structural representation of socket in a preferred embodiment of the present invention.
Figure 13 is the structural representation of battery snap in a preferred embodiment of the present invention.
In figure, 10, casing; 11, installation portion; 12, hand grip portion; 13, base portion; 141, little V-shaped groove; 142, large V-shaped groove; 143, rear venting groove; 15, left casing; 16, right casing; 17, rear chassis; 20, power brick; 201, upper cover; 2011, jack; 2012, lockhole; 2013, concave part; 2014, lid installing hole; 2015, body; 2016, connecting portion; 202, base; 2021, battery case; 2022, reinforcement; 2023, shrouding; 203, snap close; 2031, guide part; 2032, lock section is separated; 2033, sticking department; 204, battery snap; 2041, battery compartment; 2042, mount pad; 2043, locating slot; 2044, locating piece; 2045, limiting section; 205, battery pack; 206, conducting strip; 207, battery spring; 208, socket; 2081, seat support; 20811, locating dowel; 20812, dividing plate; 20813, interval trough; 2082, contact chip; 30, switch; 40, drill chuck; 41, drill bit installing hole; 50, brushless electric machine; 51, motor housing; 511, motor fore shell; 512, motor back cover; 513, ventilation breach; 52, power output shaft; 53, stator; 531, winding; 54, rotor; 541, magnet; 55, Hall Plate; 561, front ball bearing; 562, rear ball bearing; 57, fan blade; 571, protruding; 58, seal cover; 59, gland; 60, reduction gearing mechanism; 61, power transmission shaft; 621, gearbox fore shell; 622, gearbox back cover; 63, gear ring is stirred; 64, ring gear; 651, primary planet carrier; 652, primary planet pinion; 653, equipment gear; 661, secondary planet frame; 662, secondary planetary gear; 663, gear is connected; 671, self-locking planet carrier; 672, three-stage planetary gear; 68, self-locking mechanism; 681, from lock core; 682, self-locking ring; 69, flip stand; 70, electric motor end cap; 80, motor gear; 91, moment cover; 92, moment pad; 93, inner ring; 94, moment spring; 95, forceball bearing; 101, selector button; 102, push rod; 103, gear ring is compensated; 104, labeling fastener; 105, belt fastener; 106, tuning fork.
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 figure 1 to figure 13, this electric drill comprises casing 10, casing 10 comprises the installation portion 11 set gradually from top to bottom, hand grip portion 12, base portion 13, power brick 20 is installed below base portion 13, in hand grip portion 12 front end, switch 30 is installed, the drill chuck 40 with drill bit installing hole 41 is installed in installation portion 11 front end, brushless electric machine 50 is installed in installation portion 11 and brushless electric machine 50 is connected with drill chuck 40 by reduction gearing mechanism 60, power brick 20, switch 30, brushless electric machine 50 three is electrically connected and forms closed-loop path, brushless electric machine 50 comprises motor housing 51 and power output shaft 52, the stator 53 being provided with winding 531 is installed in motor housing 51, be provided with the rotor 54 of at least one magnet 541, the Hall Plate 55 be electrically connected with stator 53, arrange and the fan blade 57 be set on power output shaft 52 near installation portion 11 rear end, power output shaft 52 and rotor 54 are connected, it is outer and be connected with reduction gearing mechanism 60 that power output shaft 52 part stretches out motor housing 51, motor housing 51 offers the multiple ventilation breach 513 that arrange corresponding to fan blade 57, casing 10 offers the multiple ventilation slots being extended to installation portion 11 rear end by hand grip portion 12 rear end, be provided with in casing 10 and each ventilation breach 513, the vent passages of the equal UNICOM of each ventilation slot, fan blade 57 can drive external air flow first to enter vent passages by the ventilation slot of hand grip portion 12 rear end, flowed out outside casing 10 by the ventilation slot of installation portion 11 rear end again.
As prioritization scheme, power brick 20 in the present invention comprises base 202, the battery pack 205 that be located in the upper cover 201 on base 202 and be arranged on base 202, upper cover 201 and base portion are connected, the battery case 2021 of multiple circular arc is offered at base 202, two adjacent battery cases 2021 are interconnected, multiple reinforcement 2022 offering circular arc cutaway is vertically installed with in each battery case 2021, be parallel to each other between reinforcement 2022, the plane of the breach continuity formation of circular arc and battery case 2021, vertically two shroudings 2023 are protruded respectively at battery case 2021 two ends, shrouding 2023 exceeds battery case 2021, when upper cover 201 be located on base 202, shrouding 2023 seals and inserts in upper cover 201.
In this case, power brick 20 is rationally distributed, practical.Specifically, arrange the battery case 2021 of circular arc, supported by reinforcement 2022 in battery case 2021, overall construction intensity is high, and material is saved, and cost is low; All arrange shrouding 2023 at the two ends of battery case 2021, shrouding 2023 can insert upper cover 201, convenient installation and location, and structure is ingenious; Shrouding 2023 and base 202 are arranged to one, and decrease part, the operation of less assembling, production efficiency is high.
In battery pack 205, button is provided with battery snap 204, battery snap 204 offers multiple battery compartment 2041 intersected continuously, battery compartment 2041 is in circular groove, notch outwardly, battery pack 205 is arranged in battery compartment 2041, battery compartment 2041 and battery case 2021 are just to setting, battery snap 204 is affixed to base 202, as preferably, battery pack 205 is made up of five groups of lithium batteries, protrude at the back side of battery compartment 2041 and form mount pad 2042, upper cover 201 is provided with socket 208, socket 208 is electrically connected with conducting strip 206, conducting strip 206 is in tabular, connecting portion 2016 is formed in the vertical bending of a side of conducting strip 206, conducting strip 206 is soldered to battery pack 205, when battery pack 205 is mounted to battery case 2021, the conducting strip 206 at battery pack 205 two ends is arranged between two shroudings 2023, connecting portion 2016 is connected by wire with socket 208, upper cover 201 offers jack 2011, jack 2011 is just to socket 208, socket 208 is arranged on upper cover 201 and is resisted against on mount pad 2042, a columniform locating piece 2044 is protruded at battery snap 204, locating piece 2044 and mount pad 2042 points are located at the two ends of battery snap 204, locating piece 2044 is provided with battery spring 207, the other end of battery spring 207 is connected with snap close 203, snap close 203 is pushed against upper cover 201 and protrudes upper cover 201.
The battery snap 204 matched with battery case 2021 and battery pack 205 is set, by firm for battery pack 205 stable being fixed on base 202, not easily can loosens, good stability; Conducting strip 206 is welded on the two ends of corresponding battery pack 205, and conduct electricity very well, connection reliability is high, and current-conveying good, electric energy loss is few; Arrange mount pad 2042 at the back side of battery snap 204, for supporting the socket 208 be arranged on upper cover 201, pressure during plug socket 208 is shared to battery snap 204 and base 202, and it is firm that socket 208 connects, not fragile; Battery snap 204 arranges locating piece 2044 and installs battery spring 207, battery spring 207 is easy for installation, and guidance quality is good, and direction is stablized, and not easily runs; Snap close 203 convenience and other equipment connections are set.
Specifically, multiple contact chips 2082 that socket 208 comprises seat support 2081 and is arranged on seat support 2081, contact chip 2082 is electrically connected to corresponding battery pack 205, two contact chips 2082 are one group and are separated by dividing plate 20812 between two adjacent groups, two contact chips 2082 with group are pressed close near the end of one end, both ends are outwards launched respectively, as preferably, wire can be electrically connected to a slice in one group of contact chip 2082, two contact chips 2082 in one group are independently arranged on socket 208, socket 208 is offered multiple independent and parallel interval trough 20813, contact chip 2082 inserts in interval trough 20813, two flat boards of the rectangular shape of seat support 2081, contact chip 2082 is arranged in the cornerite of seat support 2081 parcel, in the columniform locating dowel 20811 of the outwardly formation in the side of seat support 2,081 one, mount pad 2042 offers locating slot 2043, socket 208 is mounted to upper cover 201, when upper cover 201 button is established to base 202, locating dowel 20811 is inserted in locating slot 2043.
Socket 208 is installed contact chip 2082, connects and be connected with contact chip 2082 through jack 2011, convenient power taking and charging from power brick, easy to use; Jack 2011 is set and can stops that the foreign matter of large drops in power brick; Arrange dividing plate 20812 effectively two groups of contact chips 2082 to be separated, easy for installation, good insulating; Socket 208 arranges interval trough 20813, and contact chip 2082 is arranged to monolithic, and contact chip 2082 is saved, easy for installation; Seat support 2081 arranges locating dowel 20811, and can effectively be supported in power brick, the pressure that socket 208 is subject to is transferred to base 202, and structure be ingenious.
Further, upper cover 201 comprises body 2015 and the vertical connecting portion 2016 protruding body 2015, a concave part 2013 is offered in the intersection of body 2015 and connecting portion 2016, lid installing hole 2014 is offered in concave part 2013, one end near concave part 2013 on connecting portion 2016 offers lockhole 2012, jack 2011 is opened in the other end of connecting portion 2016, snap close 203 comprises guide part 2031, perpendicular to the solution lock section 2032 of guide part 2031 with perpendicular to the sticking department 2033 separating lock section 2032, limiting section 2045 is provided with in the end of battery snap 204, when upper cover 201 button is established to base 202, a chute is formed between the inwall of upper cover 201 and limiting section 2045, guide part 2031 is slidably installed in chute, battery spring 207 is resisted against to be separated on lock section 2032, the periphery of sticking department 2033 is limited in the lockhole 2012 and end of sticking department 2033 protrusion lockhole 2012, separate lock section 2032 and protrude lid installing hole 2014, when pressing solution lock section 2032, snap close 203 can slide along limiting section 2045, sticking department 2033 is retracted in upper cover 201 along lockhole 2012, when unclamping solution lock section 2032, battery spring 207 promotes to separate lock section 2032 and moves along limiting section 2045 direction, sticking department 2033 protrudes upper cover 201 along lockhole 2012 and can be connected to other equipment.
The end of battery snap 204 and the madial wall of upper cover 201 form the chute of guidance quality, facilitate the guide part 2031 on snap close 203 to slide in chute, play guide effect, produce chute, reduce the size of power brick by battery snap 204 with coordinating of upper cover 201; Snap close 203 can with battery spring 207 rectilinear motion, and can be connected to other equipment again, facilitate power brick to install, structure simple designs is ingenious.
In the present invention, power brick 20 can be built in casing 10, also can be connected on outward on casing 10, avoid outside lines excessively random, be convenient to user's take-up, offer convenience to telecommute.The drill bit installing hole 41 of drill chuck 40 can be used for the drill bit installing all size, and structure is simple and frock is convenient.
During use, power brick 20 provides electric power to export, control brushless electric machine 50 by toggle switch 30 to operate, brushless electric machine 50 (i.e. power output shaft 52) drives the related drill chuck 40 of reduction gearing mechanism 60 to operate, and then drill chuck 40 drives bit operation, electric drill is made to realize scraping material surface, pierce the functions such as object.
This electric drill in an initial condition, integral layout is reasonable, selection of Motor is brushless electric machine 50, its inside eliminates carbon brush (i.e. brush), the electric spark produced when operating without brush motor, greatly reduce the interference of electric spark external electronic equipments, during motor rotation, frictional force reduces greatly, run smooth and easy, noise can be much lower.And non-carbonate design makes the wearing and tearing of brushless electric machine 50 mainly produce on bearing, from mechanical angle, brushless electric machine 50 has been almost a kind of non-maintaining motor, time necessary, only need do some dedustings to safeguard, extend the service life of brushless electric machine 50, also make arriving of the service life of overall electric drill ensure.
Brushless electric machine 50 in this case is formed primarily of stator 53, rotor 54, Hall Plate 55, power output shaft 52, and Hall Plate 55 and stator 53 are electrically connected, and is used for detecting magnet 541, changes of magnetic field that rotor 54 produces when rotating.Hall Plate 55 is a kind of Mageneto-sensitive type position sensors, can be replaced to other Mageneto-sensitive type position sensors according to the actual requirements, repeat no more herein.During work, Hall Plate 55 presses the change of rotor 54 position, along a graded, the change of current (the i.e. position of the relative winding 531 of detection rotor 54 magnetic pole is carried out to the electric current of winding 531 on stator 53, and produce position sensor signal in the position determined, go to control power switch 30 circuit after signaling conversion circuit process, carry out winding 531 current switching by certain logical relation).The electronic circuit that on stator 53, the operating voltage of winding 531 exports control by Hall Plate 55 provides.Above-mentioned brushless electric machine 50 vibrational power flow is simple and space layout is compact, decreases area occupied, and brushless electric machine 50 stable working, easy to maintenance.
In addition, brushless electric machine 50 in the present invention is preferably mounted at installation portion 11 back-end location, and at brushless electric machine 50, installation portion 11 back-end location is provided with fan blade 57, motor housing 51 offers the ventilation breach 513 that arrange corresponding to fan blade 57, casing 10 offers ventilation slot, the vent passages (not shown) with the equal UNICOM of each ventilation slot is provided with in casing 10, in the electric drill course of work, switch 30 controls brushless electric machine 50 and operates, fan blade 57 rotates simultaneously, fan blade 57 rotate the absorption affinity that produces by with the coordinating of ventilation breach 513, fan blade 57 drives external air flow to be first inhaled into electric drill machine shell 10 inside (namely in vent passages) by the ventilation slot of hand grip portion 12 rear end, flowed out outside casing 10 by the ventilation slot of installation portion 11 rear end again.
External air flow by casing 10 lower end migration in the process of upper end, the heat that each parts inner produce is siphoned away, the heat given out in electric drill can be flowed out outside casing 10 in time, radiating effect is desirable, ensure the normal operation of each parts, avoid the parts such as motor or reduction gearing mechanism 60 overheated and burn the generation of phenomenon, improve the service life of electric drill.
Preferably, casing 10 is fastened by left casing 15, right casing 16 and rear chassis 17 and forms, and is convenient to casing 10 like this and mounts and dismounts, subsequent maintenance, clean also more convenient.Ventilation slot by being opened in the little V-shaped groove of multiple row 141 of hand grip portion 12 rear end, the large V-shaped groove of multirow 142 being opened in installation portion 11 side, multiple rear venting grooves 143 of being opened in installation portion 11 rear end form, large V-shaped groove 142, little V-shaped groove 141 half are opened on left casing 15, second half is opened on right casing 16, and each rear venting groove 143 is all opened on rear chassis 17.Such ventilation slot topology layout is reasonable, external air flow enters in casing 10 by little V-shaped groove 141 equably, flow out outside casing 10 by large V-shaped groove 142, ventilation slot again, preferably the size of large V-shaped groove 142, ventilation slot is greater than the size of little V-shaped groove 141, improve transfer rate, make external air flow enter in casing 10, fully can absorb heat and be taken out of outside casing 10.The opening of preferred V-shaped groove deviates from drill chuck 40 and arranges, and can form negative pressure space, air flow energy is entered in casing 10 more swimmingly entering V-shaped groove place.
Concrete, winding 531 is plugged on stator 53, and rotor 54 is located in the middle part of stator 53, and magnet 541 is arranged in tabular, and magnet 541 quantity is four and four each magnet 541 are circumferentially evenly arranged on rotor 54.Above-mentioned magnet 541 is evenly distributed and coordinates with winding 531 closely, and brushless electric machine 50 stable working, stator 53 is connected closely with rotor 54, makes brushless electric machine 50 compact in design, improves space availability ratio.
Motor housing 51 is fastened by motor fore shell 511 and motor back cover 512 and forms, motor fore shell 511 and motor back cover 512 all offer ventilation breach 513, stator 53 is installed in the middle part of motor housing 51, Hall Plate 55 is arranged between stator 53 and motor fore shell 511, power output shaft 52 rear end is movably arranged in the middle part of motor back cover 512 by rear ball bearing 562, be connected with rotor 54 in the middle part of power output shaft 52, power output shaft 52 front end is flexibly connected with motor fore shell 511 by front ball bearing 561, power output shaft 52 front end through Hall Plate 55 and part to stretch out motor housing 51 outer and be connected with reduction gearing mechanism 60.
Above-mentioned motor housing 51 and each inner components coordinate closely, the parts of each motor are rationally distributed, make overall brushless electric machine 50 internal structure compact in design, ensure that the stationarity that brushless electric machine 50 works, make power output shaft 52 can export driving force reposefully.
Preferably, fan blade 57 is arranged between motor back cover 512 and stator 53, fan blade 57 is tightly connected by seal cover 58 and stator 53, be provided with protruding 571 in the middle part of the outer face that fan blade 57 faces motor fore shell 511, be tightly connected with seal cover 58, power output shaft 52 in the middle part of protruding 571 embedding sealing lids 58.
Seal cover 58 and protruding 571 be arranged so that stator 53, power output shaft 52 is protected with the sealing of motor back cover 512 three, there is the effect such as dust-tight, water proof, ensure that the stationarity that brushless electric machine 50 works.Motor back cover 512, fan blade 57, seal cover 58, stator 53 and power output shaft 52 are rationally distributed, and the compact conformation of brushless electric machine 50 rear end, improves space availability ratio and job stability.In addition, above-mentioned fan blade 57 and arranging of projection 571 all play position-limiting action to power output shaft 52 and stator 53, facilitate frock, have ensured the reliability that brushless electric machine 50 works.
Preferably, be provided with the gland 59 be set in outside power output shaft 52 between motor fore shell 511 and stator 53, gland 59 to be located in Hall Plate 55 and to be tightly connected with motor fore shell 511, stator 53.
Gland 59 be arranged so that the sealing of stator 53, power output shaft 52, Hall Plate 55, motor fore shell 511 is protected, there is the effect such as dust-tight, water proof, ensure that the stationarity that brushless electric machine 50 works.Motor fore shell 511, gland 59, Hall Plate 55, stator 53 and power output shaft 52 are rationally distributed, and the compact conformation of brushless electric machine 50 front end, improves space availability ratio and job stability.In addition, arranging of above-mentioned gland 59 all plays position-limiting action to power output shaft 52 and Hall Plate 55, facilitates frock, has ensured the reliability that brushless electric machine 50 works.
Further, brushless electric machine 50 is arranged in installation portion 11 by electric motor end cap 70, power output shaft 52 front end is fixed with motor gear 80, drill chuck 40 is arranged on installation portion 11 front end by moment cover 91, reduction gearing mechanism 60 comprises power transmission shaft 61, gearbox fore shell 621, gearbox back cover 622, stir gear ring 63, ring gear 64, gearbox fore shell 621 and gearbox back cover 622 are connected and form gearbox body and gearbox body is arranged in installation portion 11, gearbox body is arranged between moment cover 91 and brushless electric machine 50, the first speed change assembly is provided with in gearbox body, second speed change assembly, 3rd speed change assembly, first speed change assembly comprises primary planet carrier 651 and three primary planet pinions 652 be circumferentially evenly plugged on primary planet carrier 651, second speed change assembly comprises secondary planet frame 661 and five secondary planetary gears 662 be circumferentially evenly plugged on secondary planet frame 661, stir gear ring 63 simultaneously with three primary planet pinions 652, the outer peripheral face of five secondary planetary gears 662 is connected with a joggle, motor gear 80 is connected with a joggle with the inner peripheral surface of three primary planet pinions 652 simultaneously, 3rd speed change assembly comprises self-locking planet carrier 671 and five three-stage planetary gear 672 be circumferentially evenly plugged on self-locking planet carrier 671, ring gear 64 is connected with a joggle with the outer peripheral face of five three-stage planetary gear 672 simultaneously, be installed with in the middle part of secondary planet frame 661 and connect gear 663 and the inner peripheral surface connecting gear 663 and five three-stage planetary gear 672 is connected with a joggle, power transmission shaft 61 is located in installation portion 11, power transmission shaft 61 one end is overlapped 91 through moment and is connected with drill chuck 40, the other end is passed gearbox body and is connected by self-locking mechanism 68 and self-locking planet carrier 671, power transmission shaft 61, primary planet carrier 651, secondary planet frame 661, self-locking planet carrier 671, power output shaft 52 is coaxially arranged.
The setting party of electric motor end cap 70 the frock of brushless electric machine 50 and dismounting, also ensured the stability that brushless electric machine 50 works further.
In the present invention, reduction gearing mechanism 60 comprises three groups of speed change assemblies, reasonable in design, and each parts layout is tight and fixed, makes electric drill not easily occur rocking in inside in the course of the work, ensure that operating efficiency.This reduction gearing mechanism 60 can realize three-step gear shift, improves operating efficiency further.The driving force of brushless electric machine 50 is sent on power transmission shaft 61 by reduction gearing mechanism 60, in the course of work, brushless electric machine 50 synchronously drives power transmission shaft 61 to rotate, and then turning cylinder drives drill chuck 40 to rotate, drill chuck 40 drives bit operation, makes electric drill realize scraping material surface, pierce the functions such as object.
Preferably, self-locking mechanism 68 comprise be installed in the middle part of self-locking planet carrier 671 from lock core 681, to be connected with from lock core 681 and to be fastened on the self-locking ring 682 on self-locking planet carrier 671, power transmission shaft 61 is through self-locking ring 682 and be connected with from lock core 681.Self-locking mechanism 68 compact in design, each parts not easily rock in the course of the work, ensure that job stability, and self-locking mechanism 68 matches with switch 30, when electric drill is started working, toggle switch 30, brushless electric machine 50 comes into operation and drives power transmission shaft 61 to rotate, now power transmission shaft 61 can rotate down under self-locking mechanism 68 acts on always, do not put according to switch 30 without the need to operator always, reduce labour intensity, can alleviate hand fatigue during long-time boring, frock is convenient and flexibility is large.
Preferably, be provided with in installation portion 11 and the flip stand 69 stirred gear ring 63 and be connected, installation portion 11 is movably installed with the selector button 101 be connected with flip stand 69, be installed with equipment gear 653 in the middle part of primary planet carrier 651 and the inner peripheral surface of equipment gear 653 and five secondary planetary gears 662 is connected with a joggle, selector button 101 can drive flip stand 69 horizontal sliding and related gear ring 63 of stirring engages with primary planet pinion 652 outer peripheral face or departs from.On selector button 101, preferably arrange mark so that operator's identification, easy to process, practicality is good.On installation portion 11, be preferably also provided with the resetting-mechanism (such as back-moving spring) resetted after making selector button 101 action, make integral layout more reasonable.On installation portion 11, be preferably provided with the tuning fork 106 matched with selector button 101, can send clear and melodious sound when making to pull selector button 101, convenient operation workman identification, easy to use, flexibility is large.
Flip stand 69 and selector button 101 reasonable in design and easy for installation, when selector button 101 drive flip stand 69 horizontal sliding and related stir gear ring 63 engage with the outer peripheral face of each primary planet pinion 652, secondary planetary gear 662 simultaneously time, reduction gearing mechanism 60 now can realize three-step gear shift; Drive flip stand 69 horizontal sliding when selector button 101 and relatedly stir after gear ring 63 departs from primary planet pinion 652 outer peripheral face, now stir gear ring 63 when only engaging with the outer peripheral face of each secondary planetary gear 662, reduction gearing mechanism 60 now can realize level Four speed change.Above-mentioned flip stand 69, selector button 101 and stir gear ring 63 be arranged so that transmission device versatility in this case is wider, selector button 101 operates also more convenient.
Preferably, moment pad 92 and inner ring 93 is provided with in moment cover 91, moment pad 92 and gearbox fore shell 621 are tightly connected, between moment pad 92 and inner ring 93, be provided with moment spring 94, power transmission shaft 61 is passed moment pad 92 and is flexibly connected with inner ring 93 by least one forceball bearing 95.Parts in above-mentioned each moment cover 91 are arranged so that the axiality of power transmission shaft 61 and moment cover 91, stability is protected.
As everyone knows, can produce vibrations in electric drill work, inner ring 93 contacts with drill chuck 40, moment spring 94 and inner ring 93 the vibrations that can absorb electric drill and produce are set, thus decrease the transmission of vibrations to human body, and reasonable in design, improve comfort and operating accuracy.
Preferably, also be provided with in the middle part of hand grip portion 12 and can control the push rod 102 of brushless electric machine 50 rotating and the two ends of push rod 102 are each passed through left casing 15 and right casing 16, push rod 102, brushless electric machine 50, switch 30, power brick 20 are electrically connected and form closed-loop path, when needs electric drill reverses, by lower push-rod 102, use simple and convenient, flexibility is large, makes electric drill can be applicable to more occasions.
Preferably, compensate gear ring 103 stirring gear ring 63 is also provided with, compensate gear ring 103 and can widen and stir gear ring 63, make to stir gear ring 63 stable working, improve operating efficiency.
Left casing 15 and right casing 16 are equipped with labeling fastener 104, and easy for installation, this instrument of convenient operation personnel identification, practicality is good.Base portion 13 is also provided with belt fastener 105, and belt fastener 105 makes electric drill to hang up or to tie up on waist, is convenient to electric drill storage and transports.
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 (10)
1. an electric drill, it is characterized in that: comprise casing, described casing comprises the installation portion set gradually, hand grip portion, base portion, below base portion, power brick is installed, in hand grip portion front end, switch is installed, the drill chuck with drill bit installing hole is installed in installation portion front end, in installation portion, brushless electric machine is installed and brushless electric machine is connected with drill chuck by reduction gearing mechanism, described power brick, switch, brushless electric machine three is electrically connected, described brushless electric machine comprises motor housing and power output shaft, the stator being provided with winding is installed in motor housing, be provided with the rotor of at least one magnet, the Hall Plate be electrically connected with stator, arrange and the fan blade be set on power output shaft near installation portion rear end, described power output shaft and rotor are connected, it is outer and be connected with reduction gearing mechanism that described Power output shaft portion stretches out motor housing, motor housing offers the some ventilation breach that arrange corresponding to fan blade, casing offers the some ventilation slots being extended to installation portion rear end by hand grip portion rear end, be provided with in casing and each ventilation breach, the vent passages of the equal UNICOM of each ventilation slot, described fan blade can drive external air flow first to enter vent passages by the ventilation slot of hand grip portion rear end, flowed out outside casing by the ventilation slot of installation portion rear end again.
2. a kind of electric drill according to claim 1, it is characterized in that: described casing is fastened by left casing, right casing and rear chassis and forms, described ventilation slot is made up of the little V-shaped groove of the multiple row being opened in hand grip portion rear end, the large V-shaped groove of multirow being opened in installation portion side, some rear venting grooves of being opened in installation portion rear end, described large V-shaped groove, little V-shaped groove half are opened on left casing, second half is opened on right casing, and each rear venting groove is all opened on rear chassis.
3. a kind of electric drill according to claim 2, it is characterized in that: described winding is plugged on stator, described rotor is located in the middle part of stator, and described magnet is that tabular is arranged, and described magnet quantity is four and four each magnet are circumferentially evenly arranged on rotor.
4. a kind of electric drill according to claim 3, it is characterized in that: described motor housing is fastened by motor fore shell and motor back cover and forms, motor fore shell and motor back cover all offer ventilation breach, described stator is installed in the middle part of motor housing, described Hall Plate is arranged between stator and motor fore shell, described Power output shaft rear end is movably arranged in the middle part of motor back cover by rear ball bearing, be connected with rotor in the middle part of described power output shaft, described power output shaft front end is flexibly connected with motor fore shell by front ball bearing, described power output shaft front end through Hall Plate and part to stretch out motor housing outer and be connected with reduction gearing mechanism.
5. a kind of electric drill according to claim 4, it is characterized in that: described fan blade is arranged between motor back cover and stator, described fan blade is connected with seal stator by seal cover, be provided with projection in the middle part of the outer face that described fan blade faces motor fore shell, be tightly connected with seal cover, power output shaft in the middle part of described protruding embedding sealing lid.
6. a kind of electric drill according to claim 5, is characterized in that: between motor fore shell and stator, be provided with the gland be set in outside power output shaft, and described gland to be located in Hall Plate and to be connected with motor fore shell, seal stator.
7. a kind of electric drill according to claim 6, it is characterized in that: described brushless electric machine is arranged in installation portion by electric motor end cap, described power output shaft front end is fixed with motor gear, described drill chuck is arranged on installation portion front end by moment cover, described reduction gearing mechanism comprises power transmission shaft, gearbox fore shell, gearbox back cover, stir gear ring, ring gear, described gearbox fore shell and gearbox back cover are connected and form gearbox body and gearbox body is arranged in installation portion, described gearbox body is arranged between moment cover and brushless electric machine, the first speed change assembly is provided with in described gearbox body, second speed change assembly, 3rd speed change assembly, described first speed change assembly comprises primary planet carrier and three primary planet pinions be circumferentially evenly plugged on primary planet carrier, described second speed change assembly comprises secondary planet frame and five secondary planetary gears be circumferentially evenly plugged on secondary planet frame, described stir gear ring simultaneously with three primary planet pinions, the outer peripheral face of five secondary planetary gears is connected with a joggle, described motor gear is connected with a joggle with the inner peripheral surface of three primary planet pinions simultaneously, described 3rd speed change assembly comprises self-locking planet carrier and five three-stage planetary gear be circumferentially evenly plugged on self-locking planet carrier, described ring gear is connected with a joggle with the outer peripheral face of five three-stage planetary gear simultaneously, be installed with in the middle part of described secondary planet frame and connect gear and the inner peripheral surface connecting gear and five three-stage planetary gear is connected with a joggle, described power transmission shaft one end is overlapped through moment and is connected with drill chuck, the other end is passed gearbox body and is connected by self-locking mechanism and self-locking planet carrier, described power transmission shaft, primary planet carrier, secondary planet frame, self-locking planet carrier, power output shaft is coaxially arranged.
8. a kind of electric drill according to claim 7, it is characterized in that: described self-locking mechanism comprise be installed in the middle part of self-locking planet carrier from lock core, to be connected with from lock core and to be fastened on the self-locking ring on self-locking planet carrier, described power transmission shaft is through self-locking ring and be connected with from lock core.
9. a kind of electric drill according to claim 8, it is characterized in that: be provided with in installation portion and the flip stand stirred gear ring and be connected, installation portion is movably installed with the selector button be connected with flip stand, be installed with equipment gear in the middle part of described primary planet carrier and the inner peripheral surface of equipment gear and five secondary planetary gears is connected with a joggle, described selector button can drive flip stand horizontal sliding and related gear ring of stirring engages with primary planet pinion outer peripheral face or departs from.
10. a kind of electric drill according to claim 9, it is characterized in that: be also provided with in the middle part of hand grip portion and can control the push rod of brushless electric machine rotating and the two ends of push rod are each passed through left casing and right casing, described push rod, brushless electric machine, switch, power brick are electrically connected.
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| CN201410708951.4A CN104588727B (en) | 2014-11-28 | 2014-11-28 | Electric drill |
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| CN201410708951.4A CN104588727B (en) | 2014-11-28 | 2014-11-28 | Electric drill |
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| CN104588727B CN104588727B (en) | 2017-05-10 |
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| CN105515287A (en) * | 2016-02-01 | 2016-04-20 | 浙江绿动电机科技有限公司 | Water drilling tool |
| CN107028673A (en) * | 2017-03-29 | 2017-08-11 | 奉化市大烨宠物用品有限公司 | A kind of electric toothbrush |
| WO2017173706A1 (en) * | 2016-04-06 | 2017-10-12 | 浙江明磊工具实业有限公司 | Control method for brushless motor-based, controllable, detachable power apparatus |
| CN107486576A (en) * | 2017-10-18 | 2017-12-19 | 苏州雷目电子科技有限公司 | Servicing unit is safeguarded in a kind of electronic product installation |
| CN108789283A (en) * | 2017-05-05 | 2018-11-13 | 南京德朔实业有限公司 | Torsion exports tool |
| CN110369762A (en) * | 2019-07-24 | 2019-10-25 | 金陵科技学院 | A kind of electric drill and its dust collection method having dust-absorbing function |
| US10673305B2 (en) | 2016-03-30 | 2020-06-02 | Milwaukee Electric Tool Corporation | Brushless motor for a power tool |
| CN112720371A (en) * | 2020-05-12 | 2021-04-30 | 浙江动一新能源动力科技股份有限公司 | Electric tool shell and electric tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515287A (en) * | 2016-02-01 | 2016-04-20 | 浙江绿动电机科技有限公司 | Water drilling tool |
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| CN110369762A (en) * | 2019-07-24 | 2019-10-25 | 金陵科技学院 | A kind of electric drill and its dust collection method having dust-absorbing function |
| CN112720371A (en) * | 2020-05-12 | 2021-04-30 | 浙江动一新能源动力科技股份有限公司 | Electric tool shell and electric tool |
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| CN104588727B (en) | 2017-05-10 |
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Address after: 315145 Zhejiang city of Ningbo province Yinzhou District Binhai Investment Center East Yin Road No. 188 Patentee after: Zhejiang Minglei lithium energy technology Co., Ltd 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. |