CN204195613U - Spanner - Google Patents

Abstract

The utility model provides a kind of spanner, comprise body, fixed wrench jaw, adjustable wrench jaw, be slidably connected assembly and the handle that is rotatably connected with body, adjustable wrench jaw is formed by be slidably connected assembly and body and is slidably connected, spanner also comprises being connected with rotatable handle pulls a mouthful locking mechanism, pull mouthful locking mechanism for limit slippage coupling assembling relative to body along towards or the direction that deviates from fixed wrench jaw move.The spanner that the utility model provides, can increase the distance of pulling between mouth, makes to pull the summit that mouth crosses workpiece, realizes continuous several times turn workpiece, thus improves the operating efficiency of spanner; Structure is simple, can bear comparatively high pulling torque, simplify production process simultaneously, reduces cost of manufacture; Built-in first elastomeric element, avoids the first elastomeric element contact greasy dirt in use, also makes spanner more attractive in appearance; Worm gear adopts two helicitic texture, has both shortened the time regulating and pull the spacing of mouth, increases again the moment of torsion that worm gear can bear.

Description

Spanner

Technical field

The utility model relates to a kind of spanner, belongs to hand-operated tools field.

Background technology

Monkey wrench generally comprises fixed wrench jaw for holding workpiece and adjustable wrench jaw, adjustable wrench jaw can towards or deviate from fixed wrench jaw and move; By the distance between adjustment fixed wrench jaw and adjustable wrench jaw, spanner can clamp the workpiece of a series of different size, and rotary handle can screw or unscrew workpiece.

When normal activity spanner uses, user regulates the distance between fixed wrench jaw and adjustable wrench jaw, is arranged at by spanner on workpiece, in most environment for use, pinch bar can only rotate less angle, therefore needs to carry out continuous several times turn, just can screw or unscrew workpiece.Between twice turn, needing is deadlocked temporarily removes spanner from workpiece, is relocated onto on workpiece, and could continue to operate, sometimes also need to use another Hand supplementary, therefore this operation is very inconvenient.

Ratchet spanner can simplify this operation, between repeatedly rotating, will not remove and be again placed in workpiece by ratchet spanner from workpiece.

But be not easy in conjunction with ratchet and adjustable function in a spanner, this causes structure relative complex, makes tool making difficulty and cost is higher, in addition when moment of torsion is larger, spanner can be caused to damage.

Therefore, those skilled in the art are devoted to the simple ratchet spanner of structure, the part so that fast rotary is started building, and improve the operating efficiency of spanner.

Summary of the invention

Because the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide the simple spanner of a kind of structure, realize continuous several times turn workpiece, and will not remove from workpiece and be again placed on workpiece by spanner, thus improve the operating efficiency of spanner; Simultaneously because structure is simple, it is more firm that spanner can make, and not easily causes spanner to damage when moment of torsion is larger, and simple structure also simplify the production process of spanner in addition, reduces the cost of making.

The utility model provides a kind of spanner, comprise body, the fixed wrench jaw be fixedly connected with body, adjustable wrench jaw, be slidably connected assembly and the handle that is rotatably connected with body, adjustable wrench jaw is formed by be slidably connected assembly and body and is slidably connected, it is characterized in that, spanner also comprise be connected with rotatable handle pull a mouthful locking mechanism, pull mouthful locking mechanism for limit slippage coupling assembling relative to body along towards or the direction that deviates from fixed wrench jaw move, spanner also comprises handle locking mechanism;

When handle rotates in the counterclockwise direction relative to body, handle drives is pulled a mouthful locking mechanism and is transferred released state to by lock-out state, and adjustable wrench jaw can move to the direction deviating from fixed wrench jaw under external force.

The spanner that the utility model provides, for the right-handed thread workpiece of standard.

When handle rotates in the counterclockwise direction relative to body, handle is by pulling a mouthful locking mechanism with the driving that is rotatably connected between body, make to pull a mouthful locking mechanism and transfer released state to by lock-out state, make to be slidably connected assembly relative to body can along towards or the direction that deviates from described fixed wrench jaw move, thus make adjustable wrench jaw can under the effect of external force to towards or the direction that deviates from fixed wrench jaw move.

Now be rotated further handle in the counterclockwise direction, no longer relatively rotate between handle and body, but jaw is rotated relative to workpiece.Usual workpiece is hex nut, jaw turns to the position of clamping hex nut opposed apexes from the position of clamping hex nut opposite face, in this process, along with the increase of the size of the hex nut be clamped between jaw, hex nut applies active force to adjustable wrench jaw and fixed wrench jaw, under the effect of this active force, adjustable wrench jaw moves to the direction deviating from fixed wrench jaw, thus the distance increased between adjustable wrench jaw and fixed wrench jaw, enable to pull the summit that mouth slips over workpiece, arrive the position of next clamping hex nut opposite face.In this position, handle rotates along the direction screwing workpiece relative to body, i.e. clockwise direction rotary handle, and along with the rotation of handle, workpiece is screwed.

If need to continue to screw workpiece, rotary handle in the counterclockwise direction again, increase the distance between fixed wrench jaw and adjustable wrench jaw, fixed wrench jaw and adjustable wrench jaw is enable to slip over the summit of workpiece, clockwise direction rotary handle, screws workpiece, thus realizes continuous several times turn workpiece again, and will not remove from workpiece and be again placed on workpiece by spanner, improve the operating efficiency of spanner.

The spanner that the utility model provides also comprises handle locking mechanism, and handle locking mechanism is in latched position, and handle can not rotate relative to body, identical with common wrench.

Be appreciated that the spanner reversion simply provided by the utility model uses, may be used for screwing left hand thread workpiece or unscrewing right-handed thread workpiece.

Below describe all for right-handed thread workpiece.

Further, body and fixed wrench jaw are integrated.

Further, pulling mouthful locking mechanism is push rod.

Adopt push rod as pulling a mouthful locking mechanism, what spanner can be made is more firm, not easily causes spanner to damage when moment of torsion is larger; Simultaneously because structure is simple, also simplify the production process of spanner, reduce the cost of making.

Further, the assembly that is slidably connected comprises bearing pin and the worm gear be set on bearing pin, bearing pin is arranged in the through hole of body, the first end of push rod stretches into through hole and stops pin slide, pull a mouthful locking mechanism to be in the lock state, the first end of push rod exits through hole, and bearing pin can slide, and pulls a mouthful locking mechanism and is in released state.

The spanner that the utility model provides, bearing pin is arranged in the through hole of body, and the first end of push rod stretches into through hole and stops pin slide, pulls a mouthful locking mechanism and is in the lock state, at this moment jaw turns to the position of clamping hex nut opposed apexes from the position of clamping hex nut opposite face, in this process, along with the increase of the size of the hex nut be clamped between jaw, hex nut applies external force to adjustable wrench jaw and fixed wrench jaw, first end due to push rod stretches into the movement that through hole limits bearing pin, thus limit adjustable wrench jaw and move to the direction deviating from fixed wrench jaw, the distance between adjustable wrench jaw and fixed wrench jaw can not be increased, thus the summit that mouth also just can not slip over workpiece is pulled, arrive the position of next clamping hex nut opposite face.

The first end of push rod exits through hole, bearing pin can slide, pull a mouthful locking mechanism when being in released state, hex nut applies external force to adjustable wrench jaw and fixed wrench jaw, adjustable wrench jaw is moved to the direction deviating from fixed wrench jaw, increase the distance between adjustable wrench jaw and fixed wrench jaw, thus slip over the summit of workpiece, arrive the position of next clamping hex nut opposite face.

Further, the first end of push rod by the cylinder of a plane truncated part, plane without push rod axis and with the axis being parallel of push rod, make the contact surface of push rod and bearing pin be plane.

Adopt such structure, the contact surface of push rod and bearing pin is plane, and the first end of push rod reliably can stop the slip of pivot pin, even if not easily cause spanner stuck and lost efficacy when moment of torsion is larger, and increases the contact area between bearing pin 6 and push rod 10 as far as possible.

Further, worm gear is arranged in the cavity of body, is less than the length of cavity in the length of the axially worm gear of bearing pin, when making adjustable wrench jaw be subject to External Force Acting, can move to the direction deviating from fixed wrench jaw.

Further, sheathed first elastomeric element of first end of bearing pin, makes to pull mouth automatically reseting without during External Force Acting.

Further, the first elastomeric element is arranged in the hole of body, and the first elastomeric element is built in body, and avoid the first elastomeric element contact greasy dirt in use, the spanner simultaneously also making the utility model provide is more attractive in appearance.

Further, the second end of push rod is formed with the first recess of handle and is rotatably connected.When handle rotates in the counterclockwise direction relative to body, what formed with the first recess of handle by the second end of push rod is rotatably connected, drive push rod moves, thus makes the first end of push rod depart from the annular groove of bearing pin, pulls a mouthful locking mechanism and transfers released state to by lock-out state.

Further, second end of push rod is cylindrical structural, and the axis of cylinder is parallel with the contact surface between push rod with bearing pin with the axes normal of push rod, adopts cylindrical structural, ensure that and be rotatably connected solid and reliable between push rod with handle, when making moment of torsion larger, not easily cause spanner to damage; All the time contact with pivot pin with plane with the first end of the parallel guarantee push rod of the contact surface between push rod with bearing pin.

Further, the first recess of handle comprises arc-shaped profile, make between push rod with handle be rotatably connected can flexible rotating.

Further, the central angle that arc-shaped profile is corresponding is greater than 180 degree, and the second end of push rod is not easily deviate from from the first recess of handle, ensures that further push rod is solid and reliable with being rotatably connected between handle, not easily causes spanner to damage when making moment of torsion larger.

Further, handle comprises first side parallel with body first side relative to the side of body first side, also comprises and forms with body first side the second side being less than 5 degree of angles.

Because the first side of handle is parallel with body first side, handle can not be rotated along clockwise direction relative to body, when namely handle rotates along clockwise direction, will not pull a mouthful locking mechanism and transfer released state to by lock-out state, just screw workpiece.

5 degree of angles are less than because the second side of handle and body first side are formed, handle can be rotated in the counterclockwise direction relative to body, thus a mouthful locking mechanism will be pulled transfer released state to by lock-out state, adjustable wrench jaw can be moved to the direction deviating from fixed wrench jaw, thus the distance increased between fixed wrench jaw and adjustable wrench jaw, make fixed wrench jaw and adjustable wrench jaw cross the summit of workpiece.

Further, the second side of handle arranges blind hole, and the second elastomeric element is arranged in blind hole.The elastic force that second elastomeric element provides makes to pull a mouthful locking mechanism and remains on locking state, avoids in use occurring that locking is unreliable.

Further, worm gear adopts two helicitic texture, shortens the time regulating and pull the spacing of mouth, increases the moment of torsion that worm gear can bear simultaneously.

Further, handle locking mechanism is in latched position, and handle can not rotate relative to body; Handle locking mechanism is in the unlocked position, and handle can rotate relative to body.

The spanner that the utility model provides also comprises handle locking mechanism, and handle locking mechanism is in latched position, and handle can not rotate relative to body, identical with common wrench, turn clockwise handle time, screw workpiece; When being rotated counterclockwise handle, unscrew workpiece.Handle locking mechanism is in the unlocked position, and handle can rotate relative to body, turn clockwise handle time, screw workpiece; When being rotated counterclockwise handle, a mouthful locking mechanism will be pulled and transfer released state to by lock-out state, adjustable wrench jaw can be moved to the direction deviating from fixed wrench jaw, thus increase the distance between fixed wrench jaw and adjustable wrench jaw, make fixed wrench jaw and adjustable wrench jaw cross the summit of workpiece.

Further, handle locking mechanism comprises push button and fixture block, and push button is used for handle locking mechanism to move between latched position and unlocked position, and fixture block is for limiting the rotation of handle relative to body.

Further, the second recesses fit of fixture block and handle, to limit the rotation of handle relative to body.

Further, the cross section of fixture block is right-angled trapezium.

Further, the profile of the cross section of the second recess is right angle, coordinates with the right angle portions of the right-angled trapezium of fixture block.

Compared with prior art, the spanner that the utility model provides has following beneficial effect:

(1) when handle rotates in the counterclockwise direction relative to body, pull a mouthful locking mechanism and transfer released state to by lock-out state, increase the distance between fixed wrench jaw and adjustable wrench jaw under external force, thus cross the summit of workpiece, realize continuous several times turn workpiece, and will not remove from workpiece and be again placed on workpiece by spanner, thus improve the operating efficiency of spanner;

(2) structure is simple, can bear comparatively high pulling torque, simplify production process simultaneously, reduces cost of manufacture;

(3) built-in first elastomeric element, avoids the first elastomeric element contact greasy dirt in use, also makes spanner more attractive in appearance simultaneously;

(4) worm gear adopts two helicitic texture, has both shortened the time regulating and pull the spacing of mouth, increases again the moment of torsion that worm gear can bear.

Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand the purpose of this utility model, characteristic sum effect fully.

Accompanying drawing explanation

Fig. 1 is the front view of the spanner of an embodiment of the present utility model;

Fig. 2 is the sectional view of the body of the spanner shown in Fig. 1;

Fig. 3 be the spanner shown in Fig. 1 pull the partial sectional view that mouthful locking mechanism is in the lock state;

Fig. 4 is the structural representation of the adjustable wrench jaw of the spanner shown in Fig. 1;

Fig. 5 is the annexation schematic diagram pulling mouthful locking mechanism of the spanner shown in Fig. 1;

Fig. 6 be the spanner shown in Fig. 1 pull the partial sectional view that mouthful locking mechanism is in released state;

Fig. 7 is the perspective view pulling the push rod of mouthful locking mechanism of the spanner shown in Fig. 1;

Fig. 8 is the partial sectional view that the handle locking mechanism of the spanner shown in Fig. 1 is in latched position;

Fig. 9 is the partial sectional view that the handle locking mechanism of the spanner shown in Fig. 1 is in the unlocked position;

Figure 10 is the partial sectional view that the handle locking mechanism of the spanner shown in Fig. 1 is in latched position.

Detailed description of the invention

As shown in Figure 1, the spanner 1 of an embodiment of the present utility model, comprising: body 2, handle 3, fixed wrench jaw 4, adjustable wrench jaw 5 and push rod 10;

Being designed and sized to of handle 3 is suitable for user's handling, and handle 3 can comprise injection moulding sleeve pipe to improve the comfort level gripped.

Fixed wrench jaw 4 is fixedly connected with body 2, also can be one-body molded with body 2, and in the present embodiment, fixed wrench jaw 4 is one-body molded with body 2.

Body 2, fixed wrench jaw 4 can adopt cast steel or other high-strength materials to make with adjustable wrench jaw 5.

As shown in Figure 2, fixed wrench jaw 4 comprises pulls actinal surface 41, and pull actinal surface 41 and contact workpiece when wrench operated, workpiece mentioned here can comprise any equipment, parts or the securing member that spanner 1 can clamp, typical workpiece is the securing member using moment of torsion, as screw rod, hex nut and pipe fitting etc.

Body 2 comprises approximate rectangular cavity 22.

Body 2 also comprises elongated chute 23, and chute 23 extends to the below of fixed wrench jaw 4 from a side 201 of body 2 to body 2, in the present embodiment, chute 23 extends to another side 202 of body 2, and the two ends of such chute 23 have opening.Chute 23 has opening along top edge, namely towards the edge in the direction of fixed wrench jaw 4, to hold adjustable wrench jaw 5.Chute 23 is set to: adjustable wrench jaw 5 along the direction of pulling actinal surface 41 perpendicular to fixed wrench jaw 4, towards with deviate from fixed wrench jaw 4 and move, chute 23 is communicated with cavity 22.

As shown in Figure 3, adjustable wrench jaw 5 is installed on body 2, is formed be slidably connected with body 2.Adjustable wrench jaw 5 comprises pulls actinal surface 51, pulls actinal surface 51 and pulls actinal surface 41 towards fixed wrench jaw 4, and contact workpiece when wrench operated, workpiece is hex nut 19 here, and hex nut 19 is clamped in be pulled actinal surface 51 and pulls between actinal surface 41.

As shown in Figure 4, adjustable wrench jaw 5 also comprises neck 52 and flange 53, and flange 53 can slide in chute 23, and because adjustable wrench jaw 5 has neck 52, chute 23 also has similar cross section, and just size is slightly large; Make adjustable wrench jaw 5 towards or deviate from fixed wrench jaw 4 move back and forth time, adjustable wrench jaw 5 can not be deviate from from the opening part of chute 23 top edge.

Dentalation on flange 53 forms tooth bar 531, and tooth bar 531 extends from chute 23 to cavity 22.

The one or both ends of chute 23 can arrange fixture block, prevent adjustable wrench jaw 5 from skidding off from chute 23.

As shown in Figure 3, worm gear 7 is arranged in cavity 22, is set on bearing pin 6.

One end of bearing pin 6 is arranged on the side 201 of body 2 in the through hole 241 of cavity 22, and the other end of bearing pin 6 is arranged on cavity 22 in the through hole 242 of the side 202 of body 2.

Tooth bar 531 on the flange 53 of adjustable wrench jaw 5 engages with worm gear 7, the rotation translation activity of such worm gear 7 pull mouth 5 towards or deviate from fixed wrench jaw 4 and move.

Bearing pin 6 axially, the length of worm gear 7 is less than the length of cavity 22, when have External Force Acting in adjustable wrench jaw 5 pull actinal surface 51 time, adjustable wrench jaw 5 drives worm gear 7 and bearing pin 6 to move to the direction deviating from fixed wrench jaw 4 by tooth bar 531, and the distance of pulling between actinal surface 41 of pulling actinal surface 51 and fixed wrench jaw 4 of adjustable wrench jaw 5 can increase.

Bearing pin 6 is arranged at the one end in through hole 242, sheathed first elastomeric element, and in the present embodiment, the first elastomeric element is spring 9; Through hole 242 comprises two sections of different through holes of diameter, and the through-hole diameter near cavity 22 is less, and the through-hole diameter away from cavity 22 is comparatively large, holds the bearing pin 6 of sheathed first elastomeric element.

Spring 9 is for during without External Force Acting, and bearing pin 6 automatically resets, thus drives adjustable wrench jaw 5 to reset.

Spring 9 is built in the through hole 242 of body 2, and avoid spring 9 in use to contact greasy dirt, the spanner simultaneously also making the utility model provide is more attractive in appearance.

Bearing pin 6 is arranged in through hole 241.

As shown in Figure 5, second end 102 of push rod 10 is arranged in the first recess 31 of handle 3, push rod 10 and handle 3 can relatively rotate, push rod 10 is through the through hole 25 of body 2, the first end 101 of push rod 10 stretches into through hole 241 and stops bearing pin 6 to slide, and pull a mouthful locking mechanism and be in the lock state, the first end 101 of push rod 10 exits through hole 241, bearing pin 6 can slide, and pulls a mouthful locking mechanism and is in released state.

When handle 3 rotates in the counterclockwise direction relative to body 2, what formed with the recess 31 of handle 3 by the second end 102 of push rod 10 is rotatably connected, push rod 10 is driven to move, thus make the first end 101 of push rod exit through hole 241, bearing pin 6 can slide, and pulls a mouthful locking mechanism and transfers released state to by lock-out state.

Spanner in the present embodiment is used for the right-handed thread securing member of standard, workpiece is hex nut 19.

As shown in Figure 3, moving jaw 5 and regular jaw 4 clamp the position of hex nut 19 opposite face, rotated in the counterclockwise direction relative to body 2 by handle 3, handle 3, by driving push rod 10 with being rotatably connected between body 2, makes to pull a mouthful locking mechanism and transfers released state to by lock-out state.

Now be rotated further handle 3 in the counterclockwise direction, no longer relatively rotate between handle and body, but jaw is rotated relative to hex nut 19, jaw turns to the position of clamping hex nut 19 opposed apexes from the position of clamping hex nut 19 opposite face, as shown in Figure 6, in this process, along with the increase of the size of the hex nut 19 be clamped between jaw, hex nut 19 applies active force to adjustable wrench jaw 5 and fixed wrench jaw 4, under the effect of this active force, adjustable wrench jaw 5 can move to the direction deviating from fixed wrench jaw 4, thus the distance increased between adjustable wrench jaw and fixed wrench jaw, enable to pull the summit that mouth slips over hex nut 19, arrive the position of next clamping hex nut 19 opposite face.In this position, handle 3 rotates along the direction screwing workpiece relative to body 2, i.e. clockwise direction rotary handle, and along with the rotation of handle 2, hex nut 19 is screwed.

If need to continue to screw hex nut 19, rotary handle 3 in the counterclockwise direction again, increase the distance between fixed wrench jaw 4 and adjustable wrench jaw 5, make fixed wrench jaw 4 and adjustable wrench jaw 5 can slip over the summit of hex nut 19, clockwise direction rotary handle 3, screws hex nut 19, thus realizes continuous several times turn hex nut 19 again, and will not remove from hex nut 19 and be again placed on hex nut 19 by spanner, improve the operating efficiency of spanner.

Be appreciated that the spanner reversion simply provided by the utility model uses, may be used for screwing left hand thread workpiece or unscrewing right-handed thread workpiece.

As shown in Figure 7, the first end 101 of push rod by the cylinder of plane 1011 truncated part, this plane 1011 without push rod 10 axis and with the axis being parallel of push rod 10, make push rod 10 be plane with the contact surface of bearing pin 6.

Adopt such structure, push rod 10 is plane with the contact surface of bearing pin 6, the first end 101 of push rod 10 reliably can stop the slip of pivot pin 6, even if not easily cause spanner stuck and lost efficacy when moment of torsion is larger, and increases the contact area between bearing pin 6 and push rod 10 as far as possible.

Second end 102 of push rod 10 is cylindrical structurals, and the axis of cylinder is parallel with the contact surface between push rod 10 with bearing pin 6 with the axes normal of push rod 10, ensures that the first end 101 of push rod 10 contacts with pivot pin 6 with plane all the time; Adopt cylindrical structural, ensure that and be rotatably connected solid and reliable between push rod with handle, when making moment of torsion larger, not easily cause spanner to damage.

First recess 31 of handle 3 comprises arc-shaped profile, make between push rod 10 with handle 3 be rotatably connected can flexible rotating.

The central angle that arc-shaped profile is corresponding is greater than 180 degree, and the second end 102 of push rod 10 is not easily deviate from from the first recess 31 of handle 3, ensures that further push rod 10 is solid and reliable with being rotatably connected between handle 3, not easily causes spanner to damage when making moment of torsion larger.

As shown in Figure 8, handle 3 comprises first side 301 parallel with body 2 first side 203 relative to the side of body 2 first side 203, also comprises and forms with body 2 first side 203 the second side 302 being less than 5 degree of angles.

Because the first side 301 of handle 3 is parallel with body 2 first side 203, handle 3 can not be rotated along clockwise direction relative to body 2, when namely handle 3 rotates along clockwise direction, will not pull a mouthful locking mechanism and transfer released state to by lock-out state, just screw workpiece.

5 degree of angles are less than because the second side 302 of handle 3 is formed with body 2 first side 203, handle 3 can be rotated in the counterclockwise direction relative to body 2, thus a mouthful locking mechanism will be pulled transfer released state to by lock-out state, adjustable wrench jaw 5 can be moved to the direction deviating from fixed wrench jaw 4, thus the distance increased between fixed wrench jaw 4 and adjustable wrench jaw 5, make to pull the summit that mouth crosses hex nut 19.

Second side 302 of handle 3 arranges blind hole 33, and the second elastomeric element 12 is arranged in blind hole 33.The elastic force that second elastomeric element 12 provides makes push rod 10 remain on locking state, avoids in use occurring that locking is unreliable.

As shown in Figure 1, the spanner that the utility model provides also comprises handle locking mechanism, if user does not need to use ratcher function, handle locking mechanism can be arranged on latched position, namely near the position of alignment pin 8.

Handle locking mechanism 11 is installed on body 2 by the elongated hole on the flange of body 2.

When handle locking mechanism 11 is positioned at through hole one end near alignment pin 8, handle locking mechanism 11 is in latched position, and as shown in Figure 8, handle 3 can not rotate relative to body 2; Handle locking mechanism 11 is positioned at through hole one end away from alignment pin 8, and handle locking mechanism 11 is in the unlocked position, and as shown in Figure 9, handle 3 can rotate around alignment pin 8 relative to body 2.

Handle locking mechanism comprises push button, fixture block 111 and spring; Push button is used for handle locking mechanism to switch between latched position and unlocked position, as shown in Figure 10, the cross section of fixture block 111 is right-angled trapezium, the profile of the cross section of the second recess 32 of handle 3 is right angle, second recess 32 coordinates with the right angle portions of the right-angled trapezium of fixture block 111, lock handle 3, makes handle 3 can not rotate relative to body 2.

The helix number of the screw thread on usual worm gear is one, for single thread, rotate worm gear and mobile speed of pulling mouth is slower, and the moment of torsion that single threaded worm gear can bear is less, spanner in the present embodiment, worm gear adopts two helicitic texture, has both shortened the time regulating and pull the spacing of mouth, increases again the moment of torsion that worm gear can bear.

The spanner that the utility model provides, when handle rotates in the counterclockwise direction relative to body, pull a mouthful locking mechanism and transfer released state to by lock-out state, increase the distance between fixed wrench jaw and adjustable wrench jaw under external force, thus cross the summit of workpiece, realize continuous several times turn workpiece, and will not remove from workpiece and be again placed on workpiece by spanner, thus improve the operating efficiency of spanner; Structure is simple, can bear comparatively high pulling torque, simplify production process simultaneously, reduces cost of manufacture; Built-in first elastomeric element, avoids the first elastomeric element contact greasy dirt in use, also makes spanner more attractive in appearance simultaneously; Worm gear adopts two helicitic texture, has both shortened the time regulating and pull the spacing of mouth, increases again the moment of torsion that worm gear can bear.

More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.Therefore, all technical staff in the art pass through the available technical scheme of logical analysis, reasoning, or a limited experiment on the basis of existing technology according to design of the present utility model, all should in claims of the present utility model.

Claims (20)

1. a spanner, comprise: body, the fixed wrench jaw be fixedly connected with described body, adjustable wrench jaw, be slidably connected assembly and the handle that is rotatably connected with described body, described adjustable wrench jaw pass through described in be slidably connected assembly and described body formed and be slidably connected, it is characterized in that, described spanner also comprise be connected with described rotatable handle pull a mouthful locking mechanism, described pull mouthful locking mechanism for be slidably connected described in limiting assembly relative to described body along towards or the direction that deviates from described fixed wrench jaw move, described spanner also comprises handle locking mechanism;

When described handle rotates in the counterclockwise direction relative to described body, pull a mouthful locking mechanism described in described handle drives and transfer released state to by lock-out state, described adjustable wrench jaw can move to the direction deviating from described fixed wrench jaw under external force.

2. spanner as claimed in claim 1, it is characterized in that, described body and described fixed wrench jaw are integrated.

3. spanner as claimed in claim 1 or 2, is characterized in that, described in pull mouthful locking mechanism be push rod.

4. spanner as claimed in claim 3, the described assembly that is slidably connected comprises bearing pin and the worm gear be set on described bearing pin, described bearing pin is arranged in the through hole of described body, it is characterized in that, the first end of described push rod stretches into described through hole and stops described pin slide, described in pull a mouthful locking mechanism and be in described lock-out state, the described first end of described push rod exits described through hole, described bearing pin can slide, described in pull a mouthful locking mechanism and be in described released state.

5. spanner as claimed in claim 4, it is characterized in that, the described first end of described push rod by the cylinder of a plane truncated part, described plane without described push rod axis and with the axis being parallel of described push rod, make the contact surface of described push rod and described bearing pin be plane.

6. spanner as claimed in claim 4, it is characterized in that, described worm gear is arranged in the cavity of described body, is less than the length of described cavity in the length of the axially described worm gear of described bearing pin.

7. spanner as claimed in claim 6, is characterized in that, sheathed first elastomeric element of first end of described bearing pin.

8. spanner as claimed in claim 7, it is characterized in that, described first elastomeric element is arranged in the hole of described body.

9. spanner as claimed in claim 4, it is characterized in that, the second end of described push rod is formed with the first recess of described handle and is rotatably connected.

10. spanner as claimed in claim 9, it is characterized in that, described second end of described push rod is cylindrical structural, and the axis of described cylindrical structural is parallel with the contact surface between described push rod with described bearing pin with the axes normal of described push rod.

11. spanners as claimed in claim 9, is characterized in that, described first recess of described handle comprises arc-shaped profile.

12. spanners as claimed in claim 11, it is characterized in that, the central angle that described arc-shaped profile is corresponding is greater than 180 degree.

13. spanners as claimed in claim 4, is characterized in that, described handle comprises first side parallel with described body first side relative to the side of described body first side, and form with described body first side the second side being less than 5 degree of angles.

14. spanners as claimed in claim 13, is characterized in that, described second side of described handle arranges blind hole, and the second elastomeric element is arranged in described blind hole.

15. spanners as claimed in claim 4, is characterized in that, described worm gear adopts two helicitic texture.

16. spanners as claimed in claim 1, it is characterized in that, described handle locking mechanism is in latched position, and described handle can not rotate relative to described body; Described handle locking mechanism is in the unlocked position, and described handle can rotate relative to described body.

17. spanners as claimed in claim 16, it is characterized in that, described handle locking mechanism comprises push button and fixture block, and described push button is used for described handle locking mechanism to move between latched position and unlocked position, and described fixture block is for limiting the rotation of described handle relative to described body.

18. spanners as claimed in claim 17, is characterized in that, the second recesses fit of described fixture block and described handle, to limit the rotation of described handle relative to described body.

19. spanners as claimed in claim 18, is characterized in that, the cross section of described fixture block is right-angled trapezium.

20. spanners as claimed in claim 19, is characterized in that, the profile of the cross section of described second recess is right angle, coordinates with the right angle portions of the right-angled trapezium of described fixture block.