CN103707270A - Handheld tool - Google Patents
Handheld tool Download PDFInfo
- Publication number
- CN103707270A CN103707270A CN201210371015.XA CN201210371015A CN103707270A CN 103707270 A CN103707270 A CN 103707270A CN 201210371015 A CN201210371015 A CN 201210371015A CN 103707270 A CN103707270 A CN 103707270A
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- Prior art keywords
- working head
- connecting axle
- hand
- held tool
- casing
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
A handheld tool comprises a casing, an output shaft, a work head support mechanism and a connecting shaft. The output shaft is provided with an accommodating hole for accommodating a work head. The work head support mechanism is arranged inside the casing and provided with a plurality of parallel accommodating spaces used for supporting the work head, and the work head support mechanism can be adjusted to positions where one of the accommodating spaces axially corresponds to the accommodating hole of the output shaft. The connecting shaft is arranged inside the casing and can move between two positions so as to drive the work head to be in the working position inside the accommodating hole or the accommodating position of the work head support mechanism. The connecting shaft is provided with a supporting surface abutted against the work head, the work head is provided with a fitting surface abutted against the connecting shaft, and at least one of the supporting surface and the fitting surface is a curved surface.
Description
Technical field
The present invention relates to a kind of hand-held tool, relate in particular to a kind of storage and quick-replaceable drill gun class power tool of realizing working head.
Background technology
In existing drill gun class power tool, generally include electric drill, electric screw driver and percussion drill.
When activity connects the hand-held tool of working head after as drill bit, screwdriver bit and acts on operand, the problem often occurring is that working head produces and obviously rocks.Working head rocks work quality problems such as can causing working position is inaccurate, screw installation deflection, cap nut burr.
Find after deliberation, occur that the factor that working head rocks mainly contains: 1, the shape of connecting axle and the accuracy of manufacture.2, the shape of working head and the accuracy of manufacture.
Therefore,, on the basis that prior art has been carried out concentrating on studies, inventor provides a kind of hand-held tool that overcomes above-mentioned shortcoming.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of hand-held tool of working head good stability.
The technical solution adopted for the present invention to solve the technical problems is: a kind of hand-held tool, comprising: casing; Output shaft, has the accepting hole that holds working head of axial setting; Working head supporting mechanism, is arranged in casing, has some receiving spaces that are set up in parallel for support works head, and described working head supporting mechanism can be adjusted to the axial corresponding position of accepting hole of one of them receiving space and output shaft; Connecting axle, is arranged in casing, and described connecting axle can move to drive working head in being positioned at the operating position of accepting hole or being positioned at the collecting position of working head supporting mechanism between two positions; Described connecting axle have can with the supporting surface of working head butt, described working head have can with the face that connects of connecting axle butt, described supporting surface with connect face the two at least one for curved surface.
Preferably, described supporting surface and to connect the two another one of face be plane.
Preferably, described curved surface is outer convex surface.
Preferably, described supporting surface is curved surface, described in to connect face be plane.
Preferably, described supporting surface is outer convex surface.
Preferably, described accepting hole is provided with the support member of circumferential support works head.
Preferably, described connecting axle at least can be magnetized with one end of working head butt.
Preferably, described curved surface is arranged on magnet.
Preferably, described hand-held tool also comprises: motor, be arranged in casing, and outputting rotary power; Transmission mechanism, is arranged between motor and output shaft and the rotary power of motor output can be passed to output shaft.
Compared with prior art, the invention has the beneficial effects as follows: the face that connects of the supporting surface of connecting axle of the present invention and working head the two one of for curved surface, connecting axle still can firmly contact within the specific limits with the conllinear degree of working head, can not rock.
Accompanying drawing explanation
Fig. 1 is the cutaway view of the preferred power tool of the present invention when in running order.
Fig. 2 is the part three-dimensional exploded view of Fig. 1 medium power instrument.
Fig. 3 is the schematic diagram before the first embodiment of the present invention connects.
Fig. 4 is the schematic diagram that the first embodiment of the present invention connects.
Fig. 5 is the schematic diagram that the second embodiment of the present invention connects.
Fig. 6 is the 3rd embodiment schematic diagram of the present invention.
Fig. 7 is the 4th embodiment schematic diagram of the present invention.
Wherein,
100 DC electric screwdriver 2 motor 51 accepting holes
1 casing 21 gear-box 511 support members
11 slip lid 22 cover plate 52 axle sleeves
111 guide rail 3 transmission mechanism 6 working heads
112 first projection 30 pinion gear mechanisms 60 connect face
113 second projection 31 planetary gear reducing mechanism 7 storage folders
12 gathering sill 4 connecting axles 71 are accommodated storehouse
13 limited block 40 supporting surface 8 batteries
14 fore shell 41 fixed block 9 press buttones
141 axial aperture 5 output shafts
The specific embodiment
The invention provides a kind of hand-held tool of working head good stability.
In the preferred embodiment of hand-held tool of the present invention, provide a kind of DC electric screwdriver, but hand-held tool related in the present invention should be defined as and only comprise this kind of DC electric screwdriver.Hand-held tool can be divided into pneumatic type, fluid pressure type, electrodynamic type instrument according to the difference of power source.In electrodynamic type instrument, there are again direct current and the differentiation exchanging.And according to the difference of the difference of working head or processing object, be divided into the instruments such as screwdriver, brill, milling.Set forth for simplicity core content of the present invention, the present invention be take DC electric screwdriver and is specifically described as example.
Please refer to Fig. 1 and Fig. 2, the transmission mechanism 3 that this DC electric screwdriver 100 comprises casing 1, motor 2, battery 8, connect with motor 2, the connecting axle 4 connecting with transmission mechanism 3, connect and drive the output shaft 5 of working head 6 motions with connecting axle 4 and for storing the working head supporting mechanism of working head 6.According to the composition of above DC electric screwdriver 100, DC electric screwdriver 100 can be successively divided into by the right side of drawing (take as rear) before backward the motor part D that motor 2 is set, the driving section C of transmission mechanism 3 is set, the storage part B of storage folder 7 and the efferent A that output shaft 5 is set are set.
Casing 1 is for holding the parts in DC electric screwdriver 100 and supplying operator's holding operation.Casing 1 is closed up and is assembled by screw (not shown) by symmetrical two and half shelly housings.Casing 1 have horizontal component and with the horizontal component handle portion that K arranges in obtuse angle.The preferred angle K of the present invention is at 100 degree between 130 degree, and when gripping handle operates like this, meeting is pleasant.The horizontal component of casing 1 is accommodated transmission mechanism 3 and motor 2 interior.The handle portion of casing 1 holds battery 8 in interior, and is provided with press button 9.Press button 9, battery 8 and motor 2 are electrically connected, and control the state of DC electric screwdriver 100.Battery 8 is fixed on the rear portion of handle portion.Press button 9 is arranged in the front portion of handle portion.
Motor 2 is direct current generator, has from motor case 1 extended motor shaft forward.Motor 2 is connected generation driving force with battery 8.In alternative embodiment, the scheme that driving force is provided can be pulsometer, hydraulic pump, internal combustion engine etc.
Connecting axle 4 one end are connected with pinion gear mechanism 30, and the other end is connected with casing 1.Shown in Fig. 3 and Fig. 6, connecting axle 4 is six square shafts.In pinion gear mechanism 30, be provided with hexagonal hole.Connecting axle 4 passes and matched in clearance in the hexagonal hole of pinion gear mechanism 30, by pinion gear mechanism 30, is driven.
Storage part B mainly comprises working head supporting mechanism.Working head supporting mechanism, is arranged in casing 1, has for storing some receiving spaces that are set up in parallel of working head 6.The working head 6 here mainly refers to that Philip's head screw screwdriver bit, slot type screwdriver that DC electric screwdriver is conventional are first-class.Output shaft 5 is provided with the accepting hole 51 of accommodating working head 6.The accepting hole 51 that working head supporting mechanism can be adjusted to one of them receiving space and output shaft 5 is corresponding position axially, thus can the different working head 6 of quick-replaceable to tighten or unclamp different screws.
In the preferred embodiment of the present invention, working head supporting mechanism is rotatable cover plate 22 and the folder of the storage between output shaft 57 that is supported on gear-box.On storage folder 7 along its circumferencial direction be evenly distributed with a plurality of accommodate working head 6 accommodate storehouse 71, that is to say and there are a plurality of receiving spaces, and a plurality of receiving space is set up in parallel along the rotation of storage folder 7.The accepting hole of accommodating storehouse 71 and output shaft 5 51 of working head 6 is axially corresponding store and is pressed from both sides 7 realizations by rotation.
The replacing of working head 6 moves axially realization by connecting axle 4.Introduce moving axially and the replacing of working head 6 of connecting axle 4 below.
On casing 1, be slidably connected with slip lid 11.Slip lid 11 can drive connecting axle 4 to move axially.The edge of slip lid 11 is provided with guide rail 111, and corresponding casing 1 is provided with gathering sill 12, and slip lid 11 is arranged in gathering sill 12 and can be slided vertically with respect to casing 1 by its guide rail 111.Certainly, can be also, on slip lid 11, gathering sill is set, the mode that guide rail is set on casing 1 moves slip lid 11.
On connecting axle 4 axial restraint be provided with a fixed block 41, slip lid 11 can drive connecting axle 4 to move by the mode being connected with fixed block 41.The inside of slip lid 11 is provided with the first projection 112 and the second projection 113 along connecting axle 4 axially spaced-aparts, and in the duty of DC electric screwdriver, the first projection 112 has apart from S with fixed block 41 axially spaced-aparts.When slip lid 11 slides backward, towards the direction of motor 2, slide, slided apart from after S, the first projection 112 and the axial butt of fixed block 41, thus slip lid 11 drives fixed block 41, then drives connecting axle 4 axially to move backward.Otherwise the second projection 113 drives connecting axle 4 axially to move forward.In addition, DC electric screwdriver 100 need to axially be pressed on working head 6 on screw or workpiece when operating, working head 6 can be subject to a reverse responsive to axial force like this, after meeting generation connecting axle 4, move, the limited block 13 that compressed by elasticity is set in present embodiment on casing 1, limited block 13 can with fixed block 41 butts and separated two positions between move, to realize restriction and to allow the axially-movable of connecting axle 4.
Certainly, slip lid 11 drives the mode that connecting axle 4 moves to also have a lot, as the annular groove around week Monday outside it can be set on connecting axle 4, slip lid 11 is extend in annular groove and is connected with connecting axle 4 by a pin or steel wire ring, so neither affect the rotation of connecting axle 4, also do not affect the movement that slip lid 11 drives connecting axle 4.
Connecting axle 4 is whole or be at least magnetized with one end of working head 6 butts.Working head 6 is adsorbed on connecting axle 4.Moving axially of connecting axle 4 drives working head 6 motions like this, makes the operating position of working head 6 in accepting hole 51 or the collecting position in working head supporting mechanism.Certainly, in connecting axle 4, also the mounting groove that holds magnet can be set.At least one magnet is installed in mounting groove.
Operation connecting axle 4 makes working head 6 in operating position.Moment of torsion when motor 2 rotates is delivered to connecting axle 4 through transmission mechanism 3, and output shaft 5 connects and rotates and drive working head 6 to rotate with connecting axle 4.While changing working head 6, operation connecting axle 4 makes the collecting position of working head 6 in working head supporting mechanism store accommodating in storehouse 71 of folder 7.Rotary work head accommodation structure, make to be equipped with the receiving space of working head 6 of coupling and the accepting hole of output shaft 5 51 axially corresponding accommodate storehouse 71 and accepting hole 51 over against.Again operating connecting axle 4 moves axially working head 6 is pushed in the accepting hole 51 that operating position is output shaft 5.
Efferent A mainly comprises output shaft 5.The accepting hole 51 of output shaft 5 and the hexagon mutually connecting that is shaped as of connecting axle 4.Output shaft 5 connects with connecting axle 4.Therefore the driving force of motor 2 is transmitted to output shaft 5 and then drives working head 6 operations.Casing 1 comprises fore shell 14.Fore shell 14 is provided with axial aperture 141.Output shaft 5 is supported in the axial aperture 141 of fore shell 14 by an axle sleeve 52.Axle sleeve 52 provides radial support to output shaft 5, can certainly realize by bearing the radial support of output shaft 5.
The cross section of conventional working head 6 shanks is orthohexagonal, and shank forms the moment of torsion forced section of working head 6.Working head 6 is inserted into output shaft 5 accepting holes 51, is output axle 5 driving work.
Connecting axle 4 have can with the supporting surface 40 of working head 6 butts.Working head 6 have can with the face that connects 60 of connecting axle 4 butts.Supporting surface 40 with connect face 60 at least the two one of be curved surface.Situation is supporting surface 40 is a curved surface with connecting face 60 both one of them, and another one is plane.Second case is supporting surface 40, and both are curved surface with connecting face 60.Introduce respectively this two kinds of situations below.
Please refer to shown in Fig. 3 to Fig. 5, supporting surface 40 is outer convex surface, connects face 60 for plane.When supporting surface 40 is outer convex surface, the central salient point E on supporting surface 40 is connected on the plane face that connects 60.Central authorities' salient point is positioned at and connects near Mian60 center with the contact position that connects face 60, and the contact zone while connecting in other words face 60 and supporting surface 40 butt is around connecting the setting of Mian60 center.Like this, even if connecting axle 4 is deposited conllinear degree low precision within the specific limits with working head 6, near central salient point on supporting surface 40 certain a bit with connect face 60 and contact, again because contact zone arranges around connecting Mian60 center, contact zone and contact zone 4 pairs of holding powers that connect face 60 of connecting axle are around more balanced, can not produce significantly and rock between the two.As shown in Figure 5, supporting surface 40 and the contact position E ' that connects face 60 depart from the middle position of supporting surface.Supporting surface 40 with connect 60, face and contact, 51 pairs of working heads 6 of accepting hole provide circumferential support, so still can prevent that working head 6 from rocking.Certainly, supporting surface 40 is also fine for inner sunken face.Refer to Fig. 6, supporting surface 40 is plane, connects face 60 for outer convex surface.
Please refer to shown in Fig. 7, supporting surface 40 is outer convex surface, connects face 60 for outer convex surface.When supporting surface 40 is outer convex surface, supporting surface 40 is point-like contact zone with the contact zone that connects face 60 formation, both are butt stably, and contact zone and contact zone 4 pairs of holding powers that connect face 60 of connecting axle are around more balanced, can not produce significantly and rock between the two.Certainly, one of them is also fine for inner sunken face with connecting face 60 for supporting surface 40.
When connecting axle 4 can be provided with magnet with one end of working head 6 butts, described magnet can arrange the curved surface matched with working head 6.
Contact zone is decided by the angle forming between working head 6 and connecting axle 4, the low precision that both conllinear degree allow in other words.Within the scope of the low precision allowing, when the axial line distance of the center of contact zone and working head 6 is less than 2 millimeters, the harmony of the holding power of 4 pairs of working heads 6 of connecting axle can be better.Especially, supporting surface 40 maximal clearance when connecting face 60 butt is less than 1 millimeter, comparatively even to the holding power of working head 6 when connecting axle 4 is subject to working head 6 compressional deformation.
By supporting surface 40, at least one of them is designed to curved surface with connecting face 60 in the present invention.Rocking of the working head 6 having caused due to the low precision of manufacturing, installation accuracy produces while having overcome both for plane.Wherein, because working head is generally standard component, the face that connects 60 of working head 6 is plane.In order to make as far as possible hand-held tool general, the supporting surface 40 of the connecting axle 4 of hand-held tool is designed to curved surface.Especially, in order to make working head 6 can rely on power to adjust to equilbrium position, the curved surface that supporting surface 40 is evagination.More excellent, in order to keep the conllinear degree between working head 6 and connecting axle 4, as shown in Figure 6, in accepting hole 51, be provided with the support member 511 of circumferential support works 6.
Claims (10)
1. a hand-held tool, comprising:
Casing;
Output shaft, has the accepting hole that holds working head of axial setting;
Working head supporting mechanism, is arranged in casing, has some receiving spaces that are set up in parallel for support works head, and described working head supporting mechanism can be adjusted to the axial corresponding position of accepting hole of one of them receiving space and output shaft;
Connecting axle, is arranged in casing, and described connecting axle can move to drive working head in being positioned at the operating position of accepting hole or being positioned at the collecting position of working head supporting mechanism between two positions;
It is characterized in that: described connecting axle have can with the supporting surface of working head butt, described working head have can with the face that connects of connecting axle butt, described supporting surface with connect face the two at least one for curved surface.
2. hand-held tool as claimed in claim 1, is characterized in that: described supporting surface and to connect the two another one of face be plane.
3. hand-held tool as claimed in claim 1, is characterized in that: described curved surface is outer convex surface.
4. hand-held tool as claimed in claim 1, is characterized in that: described supporting surface is curved surface, described in to connect face be plane.
5. hand-held tool as claimed in claim 4, is characterized in that: described supporting surface is outer convex surface.
6. hand-held tool as claimed in claim 1, is characterized in that: described accepting hole is provided with the support member of circumferential support works head.
7. hand-held tool as claimed in claim 1, is characterized in that: one end of described connecting axle and working head butt is magnetized.
8. hand-held tool as claimed in claim 1, is characterized in that: described connecting axle can be provided with magnet with one end of working head butt.
9. hand-held tool as claimed in claim 8, is characterized in that: described curved surface is arranged on magnet.
10. hand-held tool as claimed in claim 1, is characterized in that: described hand-held tool also comprises:
Motor, is arranged in casing, and outputting rotary power;
Transmission mechanism, is arranged between motor and output shaft and the rotary power of motor output can be passed to output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210371015.XA CN103707270A (en) | 2012-09-28 | 2012-09-28 | Handheld tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210371015.XA CN103707270A (en) | 2012-09-28 | 2012-09-28 | Handheld tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103707270A true CN103707270A (en) | 2014-04-09 |
Family
ID=50400808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210371015.XA Pending CN103707270A (en) | 2012-09-28 | 2012-09-28 | Handheld tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103707270A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6332384B1 (en) * | 2001-02-09 | 2001-12-25 | Gary Paul Cluthe | Multiple bit screwdriver |
| CN2593978Y (en) * | 2002-12-12 | 2003-12-24 | 吴安全 | Inserting bar fixing structure of light hand tools |
| US7124665B1 (en) * | 2005-09-26 | 2006-10-24 | Hsiu-E Chen | Screw positioning device for a screwdriver |
| CN101563192A (en) * | 2006-12-18 | 2009-10-21 | 罗伯特·博世有限公司 | Motor-driven machine tool |
| CN202292691U (en) * | 2010-05-27 | 2012-07-04 | 斯坦利布莱克和戴克公司 | Folding tool |
-
2012
- 2012-09-28 CN CN201210371015.XA patent/CN103707270A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6332384B1 (en) * | 2001-02-09 | 2001-12-25 | Gary Paul Cluthe | Multiple bit screwdriver |
| CN2593978Y (en) * | 2002-12-12 | 2003-12-24 | 吴安全 | Inserting bar fixing structure of light hand tools |
| US7124665B1 (en) * | 2005-09-26 | 2006-10-24 | Hsiu-E Chen | Screw positioning device for a screwdriver |
| CN101563192A (en) * | 2006-12-18 | 2009-10-21 | 罗伯特·博世有限公司 | Motor-driven machine tool |
| CN202292691U (en) * | 2010-05-27 | 2012-07-04 | 斯坦利布莱克和戴克公司 | Folding tool |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140409 |
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| RJ01 | Rejection of invention patent application after publication |