CN201161366Y

CN201161366Y - Electric adjustable wrench

Info

Publication number: CN201161366Y
Application number: CNU2008200838911U
Authority: CN
Inventors: 朱文江
Original assignee: CHANGCHENG JINGGONG INDUSTRY Co Ltd NINGBO
Current assignee: CHANGCHENG JINGGONG INDUSTRY Co Ltd NINGBO
Priority date: 2008-03-06
Filing date: 2008-03-06
Publication date: 2008-12-10
Anticipated expiration: 2018-03-06

Abstract

An electric diagonal wrench comprises a wrench body, a movable screw die, a motor, a power supply, a switch and a gear driving mechanism. The front end of the wrench body is provided with a fixed screw die, the fixed screw die and the movable screw die are connected to form an adjustable wrench jaw, the bottom of the movable screw die is equipped with a worm gear which meshes with a worm which drives the movable screw die to move back and forth, the output end of the gear driving mechanism meshes with the worm, a motor shaft is in drive connection with the input end of the gear driving mechanism, and a drive control circuit is formed by the motor, the power supply, and the switch. The electric diagonal wrench is characterized in that the gear driving mechanism is an at least three-stage gear reduction unit. Compared with the prior art, the electric diagonal wrench has the advantages that by utilizing a three-stage or over three stages gear reduction unit with large reduction ratio, the propulsion speed of the movable screw die is optimized, the motor rotational frequency is decreased, and the electric work efficiency is improved with a steady traveling speed and low noise. When the worm rotates to the end, one end of the worm can be positioned, needing no buffer structures.

Description

A kind of electric adjustable wrench

Technical field

The utility model relates to a kind of electric adjustable wrench, and 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, disclose a kind of electric adjustable wrench, it adopts belt or chain to drive the worm screw turn by motor, because motor speed is too fast, still inevitably there are the problems referred to above, similarly also have United States Patent (USP): US6966242, US4512221, because belt or chain drive installing space are bigger, damage easily, 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.

The utility model content

Technical problem to be solved in the utility model provides a kind of multi-stage speed-reducing, movable bolt die advances steadily strong, as to need not buffer unit, production cost electric adjustable wrench.

The utility model 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.

The improvement that is highly profitable is, described switch is the two-way change-over switch of control motor positive and inverse, it includes button, the two ends up and down of button are provided with back-moving spring, the button bottom is provided with two conduction contact blocks side by side, accordingly, be combined with the circuit board of band double-sided metal paillon foil, one side facing to button, circuit board tinsel top, middle part and bottom form a pair of output contact chip respectively side by side, a pair of input contact chip and a pair of transition contact chip, and carry the one side of button, circuit board has pair of input terminals, tinsel forms a pair of brace that input terminal and a pair of input contact chip are communicated with respectively, tinsel also forms a pair of transition contact chip is oppositely switched the brace that is connected with the output contact chip, under the button raised state, makes to be output as forward output, and under button, under the shifting state, make to be output as reverse output.Such construction of switch is very frivolous, is adapted at arranging in the long and narrow wrench body space installing, and assembling is produced easily, and is with low cost.

As improvement, described button bottom has flange, with the conduction contact block be that build-in links together, the surface of button has the raised line of convenient hand push, is convenient to hand by manipulating.

At last, described power supply adopts battery, rechargeable battery or solar cell, accordingly, is furnished with charging socket at wrench body, and perhaps solar panel is mounted on the wrench body surface.

Compared with prior art, advantage of the present utility model is: 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 avoided some maloperations to cause device damage, and structure is frivolous, and is simple and practical, installs easily, and 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 the transmission mechanism stereogram;

Fig. 7 is the switch side schematic view;

Fig. 8 is the switch three-dimensional exploded view;

Fig. 9 is circuit theory diagrams;

Figure 10 is the schematic diagram in circuit board front;

Figure 11 is the schematic diagram of back of circuit board.

The specific embodiment

Embodiment describes in further detail the utility model 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, power supply 3 in the present embodiment adopts dry cell or solar cell, when adopting solar cell, solar panel is mounted on wrench body 1 surface.

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 61 that meshes with pinion 52 reaches and the transition backgear 62 of transition front gear 61 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.

Shown in Figure 11 with reference to figure 6-, 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 4 includes button 41, and button 41 two ends are extended with protuberance 41a, are with back-moving spring 42 on the protuberance 41a, the other end of back-moving spring 42 and through hole 131 inwalls offset, button 41 can be moved around in through hole 131, and the bottom is provided with the flange 41b of downward protuberance, and the top is provided with the raised line 41c of being convenient to the application of force and pushing.The button bottom is provided with two conduction contact blocks 43 side by side, it can adopt conductive rubber strip or graphite bar, inlay with the base flange 41b of button and to be fixed together, accordingly, be combined with the circuit board 44 of band double-sided metal paillon foil, face the one side of button 41, circuit board 44 tinsel tops, middle part and bottom form a pair of output contact chip 44a respectively, a pair of input contact chip 44b and a pair of transition contact chip 44c, for the ease of making, they are provided with abreast, and carry the one side of button 41, circuit board 44 rivetings have pair of input terminals 44d, tinsel forms a pair of brace 44e that input terminal and a pair of input contact chip 44b are communicated with respectively, tinsel also forms a pair of transition contact chip 44c is oppositely switched the brace 44f that is connected with output contact chip 44a, a pair of output contact chip 44a removes to connect the input of motor by wiring, and pair of input terminals 44d removes to connect battery by wiring, thereby constitutes control loop.

Its operation principle is such: when shift knob 41 when hand puts in place by moving up under promoting, the just upwards slippage of conduction contact block 43 of button bottom surface, input contact chip 44b on the circuit board is communicated with output contact chip 44a, constitute the loop, at this moment, what motor connect is forward voltage, motor 101 forward rotation, by tertiary gear deceleration device and worm-and-wheel gear, movable bolt die 12 is moved inwards, wrench opening is diminished, on the contrary, when shift knob 41 at hand by moving down under promoting when putting in place, the just slippage downwards of conduction contact block 43 of button bottom surface, input contact chip 44b on the circuit board is communicated with transition contact chip 44c, and transition contact chip 44c is by the brace 44e of back of circuit board, voltage is oppositely switched, and then be connected to output contact chip 44a, constitute the loop, at this moment, what motor 101 connect is backward voltage, the motor backward rotation by tertiary gear deceleration device and worm-and-wheel gear, outwards moves movable bolt die 12, make wrench opening become big, and when shift knob 41 in the time of the centre position, the conduction contact block 43 of button bottom is also in the centre position, makes output contact chip 44a and the input contact chip 44b can't conducting, be in off state, do not constitute the loop, so motor is not connected with the mains, do not work

Fig. 9 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

1, a kind of 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.

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 (61) in the transition gear (6) is connected with a joggle with pinion (52), and the gear on worm (7) on the transition backgear (62) 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, according to any described electric adjustable wrench of claim of claim 1 to 5, it is characterized in that the two-way change-over switch of described switch (4) for the control motor positive and inverse, it includes button (41), the two ends up and down of button are provided with back-moving spring (42), the button bottom is provided with two conduction contact blocks (43) side by side, accordingly, be combined with the circuit board (44) of band double-sided metal paillon foil, one side facing to button, circuit board tinsel top, middle part and bottom form a pair of output contact chip (44a) respectively side by side, a pair of input contact chip (44b) and a pair of transition contact chip (44c), and carry the one side of button, circuit board has pair of input terminals (44d), tinsel forms a pair of brace (44e) that input terminal and a pair of input contact chip are communicated with respectively, tinsel also forms a pair of transition contact chip is oppositely switched the brace (44f) that is connected with the output contact chip, under the button raised state, make and be output as forward output, and under button, under the shifting state, make to be output as reverse output.

7, electric adjustable wrench according to claim 6 is characterized in that described button (41) bottom has flange (41b), with conduction contact block (43) be that build-in links together, the surface of button has the raised line of convenient hand push (41c).

8, electric adjustable wrench according to claim 6 is characterized in that described power supply adopts battery, rechargeable battery or solar cell.