CN101376235B - Electric adjustable wrench - Google Patents
Electric adjustable wrench Download PDFInfo
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- CN101376235B CN101376235B CN200710070669A CN200710070669A CN101376235B CN 101376235 B CN101376235 B CN 101376235B CN 200710070669 A CN200710070669 A CN 200710070669A CN 200710070669 A CN200710070669 A CN 200710070669A CN 101376235 B CN101376235 B CN 101376235B
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Abstract
An electric adjustable spanner comprises a spanner body, a moveable spanner threading die, a motor, a power supply, a switch and a gear transmission mechanism. A fixed threading die is arranged on the front end part of the spanner body; the fixed spanner is connected with the moveable spanner to form a spanner mouth; a worm gear tooth is arranged at the bottom of the moveable threading die and engaged and connected with a worm driving the moveable spanner to traverse; the output end of the gear transmission mechanism is meshed with the worm; a motor shaft and an input end of the gear transmission mechanism are in driving connection; and the motor, the power supply and the switch form a drive control circuit. The electric adjustable spanner is characterized in that the gear transmission mechanism is at least a three-grade gear reducer. Compared with the prior art, since the three or more grade gear reducer with high reduction ratio is adopted, the invention has the advantages of optimizing the pushing speed of the moveable spanner, reducing the number of revolution of the motor, improving the electric work efficiency, and resulting in stable traveling speed and low noise. When the worm rotates to the end, one end is positioned, and no buffer structure is needed to be arranged.
Description
Technical field
The present invention relates to a kind of hand-operated tools, relate in particular to a kind of electric adjustable wrench, this spanner can realize pulling a mouthful size adjustment by motor-driven.
Background technology
Common adjustable wrench comprises wrench body and movable bolt die, the wrench body leading section has fixedly bolt die, should be fixedly bolt die be connected with movable bolt die and form the mouth of pulling of adjustable size, movable bolt die bottom is provided with the worm screw that driving activity bolt die moves around, and this worm screw is by just the moving around of energy realization activity bolt die of front and back turn of thumb.There is following deficiency in actual applications in this kind structure: at first, nut to some specific position in the mechanical device, finger can not be stretched, perhaps hand can put in but operating position obstructs the view, at this moment manually extremely inconvenient, cause plate mouth size not in place easily, cause nut may produce permanent damage; Secondly, manually strength is limited, and needs the operating space, causes easily during design that the slit is bigger between worm screw and the movable bolt die, can cause the nut angle to damage like this in application process, can't turn, and brings loss and very burden; At last, manual operation is relatively required great effort, and poor effect, and operating efficiency also is greatly affected.
For this reason, a lot of electric adjustable wrench have appearred, adopt motor-driven to replace manually, order about the worm screw rotation, with reference to Chinese utility model patent: ZL200520074217.3, a kind of " electric wrench " (publication number: CN2855649Y) is disclosed, this patent comprises having tiger and adjusting nut, it is characterized in that pulling of described spanner adjusting nut below is provided with reducing motor in the body, the gears engaged that the gear that reducing motor rotating shaft end connects is connected with adjusting nut one end, in the cavity of pinch bar rechargeable battery is set, rechargeable battery connects charging circuit, and rechargeable battery connects motor through the DPDT key control circuit of alter-parallel.There are the following improvements that need in this kind design: the first pull the body length direction because the mode of motor setting is perpendicular to, so it is excessive to pull the body head volume, cause use constant; The second, motor rotates fast, though there is train of reduction gears to exist, in quick progradation, strength is little, and is steadily strong inadequately; The 3rd, in the progradation, there is not buffer unit fast, cause the worm screw wearing and tearing easily, electrical machinery life is affected; The 4th, speed is very fast, but active force is less on the contrary, when turning nut, causes looseningly easily, makes troubles.Similarly also have CN1868684A, though in this patent spacer pin is arranged, worm screw advances still very fast, and the Wrench head volume is unavoidably excessive.
With reference to United States Patent (USP): US6477921, a kind of electric adjustable wrench is disclosed, it adopts belt or chain to drive the worm screw turn, because motor speed is too fast by motor, still inevitably there are the problems referred to above, similarly also have United States Patent (USP): US6966242, US4512221, because it is belt or chain drive installing space are bigger, less to motor volume, so power of motor is had relatively high expectations, must increase production cost.
As further improvement, China utility model patent: ZL200520014295.4, a kind of " electric adjustable wrench " (publication number: CN2834793Y) is disclosed, be provided with the battery tray of internal battery in the spanner handle of this patent, the front portion of battery tray is equipped with direct current generator, and motor shaft protracts and links to each other with the runner shaft that has end gear by a bevel gear; Described bevel gear is socketed on the motor shaft, and further, the rear portion of bevel gear is provided with and makes it withstand the support spring of runner shaft; Also be mounted with a contact disconnect that is in series with power circuit on the support spring limit of being contracted.Motor in this patent is parallel to the wrench body length direction and is arranged in the wrench body, and adopts bevel gear to drive, and making the wrench body head volume, compact (similarly structural design also can be with reference to United States Patent (USP): US7114824); Support spring is as buffer unit, and internal mechanical structure wear intensity reduces.Though significant improvement has been arranged, worm screw advances still too fast, because motor power output quota so active force still is less, when turning nut, causes easily that still worm screw is loosening; Noise is bigger in the motor-driven process, can also do further improvement.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of multi-stage speed-reducing, movable bolt die to advance steadily strong, as to need not buffer unit, low production cost electric adjustable wrench at the above-mentioned state of the art.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this electric adjustable wrench, comprise wrench body, movable bolt die, motor, power supply, switch and gear drive, the wrench body leading section has fixedly bolt die, should be fixedly bolt die be connected with movable bolt die and form the mouth of pulling of adjustable size, movable bolt die bottom is provided with worm-gear toothing and is connected with the worm engaging that driving activity bolt die moves around, gear drive output and worm engaging, the motor shaft of motor drives with the input of gear drive and is connected, motor, power supply, switch is formed Drive and Control Circuit, it is characterized in that described gear drive is at least three grades a mechanical reduction gear.
As preferably, its slewing range of described mechanical reduction gear is 10: 1～30: 1, motor is slowed down after, can make movable bolt die obtain more satisfactory and satisfied thrust and translational speed.
As preferably, described mechanical reduction gear is three grades, motor is parallel to the wrench body length direction and is arranged in the wrench body, initiatively bevel gear is arranged on the motor shaft end, with the driven bevel gear of active bevel gear engagement, the turning cylinder two ends are connected between driven bevel gear and the pinion and constitute in-line gears, and other has stepped coaxial transition gear, transition front gear in the transition gear is connected with pinion, and the transition backgear of duplex and the gear on worm on the worm screw are connected with a joggle.It can couple together driven bevel gear and gear on worm by stepped coaxial transition gear, compact conformation, and volume is little, installs easily.
Further, described turning cylinder is arranged on the support that is fixed in the wrench body rotationally, described transition gear is gone here and there rotationally by a minor axis on the minor axis hole that is fixed in the wrench body inwall, described worm screw and gear on worm constitute one by a major axis, and rotatable string is fixed on the wrench body inwall major axis hole so easy production and assembly.
Can certainly adopt the mechanical reduction gear of level Four, but must increase installation volume like this, so serve as preferred with three grades.
Further, wrench body is divided into wrench body and is used to encapsulate the upper cover plate and the lower cover of gear drive, motor, switch and power supply, have the back through hole that is used to hold the preceding through hole of motor and gear drive and is used to hold switch and power supply in the wrench body, and described minor axis hole is arranged on the upper cover plate leading section.Produce so easily, easy to assembly quick.
What be highly profitable improvedly is, described switch is the two-way change-over switch of control motor positive and inverse, described switch includes button, changes the matrix that button positions can realize the spring leaf of electric break-make and be used to be provided with aforementioned spring leaf, aforesaid button two ends are provided with back-moving spring, the bottom is provided with the convex rib part of downward protuberance, and aforesaid spring leaf is divided into:
A pair of static contact is located on the described matrix middle part side by side and is exposed to matrix surface;
The first moving electric contact point that does not a pair ofly contact with the static contact at ordinary times, contacts with the static contact when stressed, its outside first end is fixed on the matrix end side by side, and inboard second end is no stressed free end; And
The second moving electric contact point that does not a pair ofly contact with the static contact at ordinary times, contacts with the static contact when stressed, its outside first end is fixed on the matrix end side by side, and relative with the first moving electric contact point, and inboard second end is no stressed free end;
Under the shifting state, second end of its convex rib part extruding first moving electric contact point also made this second end contact energising with the static contact before button was in; Button is under the retrude, and second end of its convex rib part extruding second moving electric contact point also makes this second end contact energising with the static contact.It can change motor steering, and has only under external force, and switch is just switched on, and has avoided some maloperations to cause device damage, and simple and practical, cost is low.
Described static contact is embedded in the matrix groove, and is the arc shape that arches upward, and is convenient to the contact energising, improves the sensitivity of work.
Described first dynamic current contact piece and second dynamic current contact piece all roughly are " Z " type, the bottom then is that first end is fixed on the matrix, the top then is second end, and the second end end has the first downward extension of arc and second extension respectively, is convenient to the contact energising.
Compared with prior art, the invention has the advantages that: overall structure is tight, and gear drive is arranged compact, volume is less, low production cost, thus the big change gear device more than three grades or three grades of speed reducing ratio can in narrow through hole, be adopted, optimized movable bolt die fltting speed, reduced the motor revolution, improved the electric work effect, the speed of travel is steady, and noise is little, end location need not to be provided with buffer structure when worm screw was rotated to the end; Adopt forward-reverse switch in the circuit, can change motor steering, and have only under external force, switch is just switched on, and has avoided some maloperations to cause device damage, and simple and practical, cost is low.
Description of drawings
Fig. 1 removes structural representation behind the upper cover plate for embodiment.
Fig. 2 is an embodiment split assembly drawing.
Fig. 3 is upper cover plate and lower cover split assembly drawing.
Fig. 4 is upper cover plate and another visual angle split assembly drawing of lower cover.
Fig. 5 is the embodiment partial enlarged drawing.
Fig. 6 is a switch split assembly drawing.
Fig. 7 is the mounting structure schematic diagram.
Fig. 8 is the on-off circuit schematic diagram.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment: with reference to figure 1 and Fig. 2, electric adjustable wrench in the present embodiment comprises wrench body 1, movable bolt die 12, motor 101, power supply 3, switch 4 and gear drive 100, wrench body 1 leading section has fixedly bolt die 11, should be fixedly bolt die 11 be connected with movable bolt die 12 and form the mouth of pulling of adjustable size, the worm screw 102 that the worm-gear toothing of movable bolt die 12 bottoms and driving activity bolt die 12 move around is connected with a joggle, gear drive 100 outputs and worm screw 102 engagements, motor 101, power supply 3, switch 4 is formed Drive and Control Circuit, and the power supply 3 in the present embodiment adopts dry cell or solar cell.
With reference to figure 3 and shown in Figure 4, wrench body 1 is divided into wrench body 1a and upper cover plate 13, lower cover 14, be provided with the back through hole 16 that is used to hold the preceding through hole 17 of gear drive 100 and motor 101 and is used to hold switch 4 and power supply 3 in the wrench body 1a, upper cover plate 13 is provided with and is used for the through hole 131 that shift knob 41 moves, lower cover 14 is provided with battery cover installing hole 141, and battery cover 15 is located in this installing hole 141, upper cover plate 13 and lower cover 14 all can adopt plastic production, and they are fixed by screw and wrench body, make gear drive 100, motor 101, switch 4, power supply 3 is packaged in the wrench body 1.
With reference to shown in Figure 5, mechanical reduction gear is three grades, and its slewing range of tertiary gear deceleration device is 10: 1～30: 1.Motor 101 is parallel to wrench body 1 length direction and is arranged in the wrench body 1, and motor shaft 103 ends have initiatively bevel gear 104, and further comprise in-line gears 5, stepped coaxial transition gear 6 and gear on worm 7.
In-line gears 5 comprise the driven bevel gear 51 with 104 engagements of active bevel gear, turning cylinder 53 is connected between driven bevel gear 51 and the pinion 52 and has constituted in-line gears 5, turning cylinder 53 is arranged on the support 54 that is fixed in the wrench body 1 rotationally, makes in-line gears 5 positioning and fixing in preceding through hole 17.
Stepped coaxial transition gear 6 comprises that the transition front gear 62 that meshes with pinion 52 reaches and the transition backgear 61 of transition front gear 62 duplexs, transition gear 6 is gone here and there the minor axis hole 63a that is fixed in wrench body 1 inwall rotationally by a minor axis 63 and is gone up (with reference to figure 4), particularly, minor axis hole 63a is positioned at the upper cover plate leading section.
Gear on worm 7 meshes with worm screw 102 coaxial rotation and with transition backgear 62, and worm screw 102 links into an integrated entity by a major axis 8 with gear on worm 7, and rotatable string is fixed on the wrench body inwall major axis hole 8a.
With reference to figure 6 and shown in Figure 7, the two-way change-over switch of switch 4 control motor positive and inverses, it is installed in the back through hole 16 of the through hole 131 of upper shell 13 and main wrench body, switch includes button 41, a pair of static contact 43, the a pair of first moving electric contact point 44, a pair of second moving electric contact point 45 and the matrix 42, button 41 two ends are extended with protuberance 412, be with back-moving spring 46 on the protuberance 412, the other end of back-moving spring 46 and through hole 131 inwalls offset, button can be moved around in through hole 131, the bottom is provided with the convex rib part 411 of downward protuberance, and the top is provided with the projection 413 of being convenient to the application of force.
A pair of static contact 43 is embedded in first groove 421 of matrix 42 middle parts side by side, and is and arches upward arc shape and be exposed to matrix 42 surfaces.
The a pair of first moving electric contact point 44 roughly is " Z " type, outer lower end then is that first end 441 is fixed on second groove 423 of matrix, the inboard is second end 442, be located at and be no stressed free end on the top, its inboard second end, 442 ends have arc and do not contact with static contact 43 when the moving electric contact point of lower extension 443, the first 44 is flat, contact with static contact 43 when stressed.
The a pair of second moving electric contact point 45 roughly is " Z " type, outer lower end then is that first end 451 is fixed on the 3rd groove 422 of matrix, inboard slight second end 452, be located at and be no stressed free end on the top, it is relative with the first moving electric contact point 44, second end, 442 ends have arc and do not contact with static contact 43 when the moving electric contact point of lower extension 453, the second 45 is flat, contact with static contact 43 when stressed.
Under the shifting state, second end 442 of its convex rib part 411 extruding first moving electric contact point also made this second end 442 contact energising with static contact 43 before button 41 was in; Button 41 is under the retrude, and second end 452 of its convex rib part 411 extruding second moving electric contact point also makes this second end 452 contact energising with static contact 43.Button 41 does not stress under the situation, and circuit is in off state.
Fig. 8 is the comparatively preferred circuit theory diagrams of present embodiment, button 41 be in reach or after when moving, motor 101 turns to just in time opposite.Certainly can also adopt other circuit layout, install and to realize that motor 101 rotatings just can adopt behind the switch of present embodiment.
Claims (7)
1. electric adjustable wrench, it comprises wrench body (1), movable bolt die (12), motor (101), power supply (3), switch (4) and gear drive (100), wrench body (1) leading section has fixedly bolt die (11), should be fixedly bolt die (11) be connected with movable bolt die (12) and form the mouth of pulling of adjustable size, the worm screw (102) that movable bolt die (12) bottom worm-gear toothing and driving activity bolt die (12) move around is connected with a joggle, gear drive (100) output and worm screw (102) engagement, the motor shaft (103) of motor (101) is in transmission connection with the input of gear drive (100), motor (101), power supply (3), switch (4) is formed Drive and Control Circuit, it is characterized in that described gear drive (100) is at least three grades a mechanical reduction gear;
Described switch (4) is the two-way change-over switch of control motor positive and inverse;
Described switch (4) includes button (41), changes the matrix (42) that button (41) position can be realized the spring leaf (43,44,45) of electric break-make and is used to be provided with aforementioned spring leaf (43,44,45), aforesaid button (41) two ends are provided with back-moving spring (46), the bottom is provided with the convex rib part (411) of downward protuberance, and aforesaid spring leaf (43,44,45) is divided into:
A pair of static contact (43) is located on described matrix (42) middle part side by side and is exposed to matrix (101) surface;
The first moving electric contact point (44) that does not a pair ofly contact with static contact (43) at ordinary times, contacts with static contact (43) when stressed, its outside first end (441) is fixed on matrix (42) end side by side, and inboard second end (442) is no stressed free end; And
The second moving electric contact point (45) that does not a pair ofly contact with static contact (43) at ordinary times, contacts with static contact (43) when stressed, its outside first end (451) is fixed on matrix (42) end side by side, and relative with the first moving electric contact point (44), inboard second end (452) is no stressed free end;
Under the shifting state, second end (442) of its convex rib part (411) extruding first moving electric contact point also made this second end (442) contact energising with static contact (43) before button (41) was in; Button (41) is under the retrude, and second end (452) of its convex rib part (411) extruding second moving electric contact point also makes this second end (452) contact energising with static contact (43).
2. electric adjustable wrench according to claim 1 is characterized in that its slewing range of described mechanical reduction gear is 10: 1～30: 1.
3. electric adjustable wrench according to claim 2, it is characterized in that described mechanical reduction gear is three grades, motor (101) is parallel to wrench body (1) length direction and is arranged in the wrench body (1), initiatively bevel gear (104) is arranged on motor shaft (103) end, driven bevel gear (51) with active bevel gear (104) engagement, turning cylinder (53) two ends are connected between driven bevel gear (51) and the pinion (52) and constitute in-line gears (5), other has stepped coaxial transition gear (6), transition front gear (62) in the transition gear (6) is connected with a joggle with pinion (52), and the gear on worm (7) on the transition backgear (61) of duplex and the worm screw (102) is connected with a joggle.
4. electric adjustable wrench according to claim 3, it is characterized in that described turning cylinder (53) is arranged on the support (54) that is fixed in the wrench body (1) rotationally, described transition gear (6) is gone here and there rotationally by a minor axis (63) and is fixed on wrench body (1) the inwall minor axis hole (63a), described worm screw (102) constitutes one with gear on worm (7) by a major axis (8), and string is fixed on the major axis hole (8a) of wrench body (1) inwall rotationally.
5. electric adjustable wrench according to claim 4, it is characterized in that described wrench body (1) is divided into wrench body (1a) and is used to encapsulate the upper cover plate (13) and the lower cover (14) of gear drive (100), motor (101), switch (4) and power supply (3), have the back through hole (16) that is used to hold the preceding through hole (17) of motor (101) and gear drive (100) and is used to hold switch (4) and power supply (3) in the wrench body (1a), and described minor axis hole (63a) is arranged on upper cover plate (13) leading section.
6. electric adjustable wrench according to claim 1 is characterized in that described static contact (43) is embedded in the matrix groove (421), and is the arc shape that arches upward.
7. electric adjustable wrench according to claim 1, it is characterized in that described first dynamic current contact piece (44) and second moving electrically contact (45) sheet and all roughly is " Z " type, the bottom then is that first end (441,451) is fixed on the matrix (42), the top then is second end (442,452), and second end (442,452) end has downward first extension (443) of arc and second extension (453) respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710070669A CN101376235B (en) | 2007-08-31 | 2007-08-31 | Electric adjustable wrench |
| US12/184,559 US7600449B2 (en) | 2007-08-31 | 2008-08-01 | Power adjustable wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710070669A CN101376235B (en) | 2007-08-31 | 2007-08-31 | Electric adjustable wrench |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101376235A CN101376235A (en) | 2009-03-04 |
| CN101376235B true CN101376235B (en) | 2010-05-26 |
Family
ID=40420054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710070669A Active CN101376235B (en) | 2007-08-31 | 2007-08-31 | Electric adjustable wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101376235B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190938A1 (en) * | 2013-05-30 | 2014-12-04 | Shanghai Kunjek Handtools And Hardware Co.,Ltd | Socket wrench |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973007A (en) * | 2010-11-11 | 2011-02-16 | 刘炳成 | Automatically clamped adjustable spanner |
| GB201615568D0 (en) * | 2016-09-13 | 2016-10-26 | Buchanan Nigel A | Dual jaw adjustable wrench |
| CN108394393A (en) * | 2018-05-03 | 2018-08-14 | 吉林大学 | A kind of electric booster braking system of large transmission ratio |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4512221A (en) * | 1983-08-25 | 1985-04-23 | Picone John A | Electric powered adjustable wrench |
| US5178046A (en) * | 1990-08-09 | 1993-01-12 | Teijin Seiki Co., Ltd. | Screw fastening device |
| US6267026B1 (en) * | 1998-03-05 | 2001-07-31 | Tozo Yamamoto | Screwdriver for self-drilling screw |
| US7114824B2 (en) * | 2004-05-03 | 2006-10-03 | Picone Products, Inc. | Multi-functional tool with interchangeable adjustable wrench head unit |
| CN201161366Y (en) * | 2008-03-06 | 2008-12-10 | 宁波长城精工实业有限公司 | Electric adjustable wrench |
-
2007
- 2007-08-31 CN CN200710070669A patent/CN101376235B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4512221A (en) * | 1983-08-25 | 1985-04-23 | Picone John A | Electric powered adjustable wrench |
| US5178046A (en) * | 1990-08-09 | 1993-01-12 | Teijin Seiki Co., Ltd. | Screw fastening device |
| US6267026B1 (en) * | 1998-03-05 | 2001-07-31 | Tozo Yamamoto | Screwdriver for self-drilling screw |
| US7114824B2 (en) * | 2004-05-03 | 2006-10-03 | Picone Products, Inc. | Multi-functional tool with interchangeable adjustable wrench head unit |
| CN201161366Y (en) * | 2008-03-06 | 2008-12-10 | 宁波长城精工实业有限公司 | Electric adjustable wrench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014190938A1 (en) * | 2013-05-30 | 2014-12-04 | Shanghai Kunjek Handtools And Hardware Co.,Ltd | Socket wrench |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101376235A (en) | 2009-03-04 |
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