CN105619299A - Wrench - Google Patents

Abstract

The invention provides a wrench. The wrench comprises a body, a fixed wrench opening, a movable wrench opening, a sliding connecting assembly and a handle rotationally connected with the body. The movable wrench opening is slidably connected with the body through the sliding connecting assembly. The wrench further comprises a wrench opening locking mechanism rotationally connected with the handle. The wrench opening locking mechanism is used for preventing the sliding connecting assembly from moving in the direction facing or deviating from the fixed wrench opening relative to the body. By the adoption of the wrench, the distance of the wrench openings can be enlarged so that the wrench openings can go over the tops of workpieces and continuously screw the workpieces more than once, so that the working efficiency of the wrench is improved; the structure is simple, the large torque can be borne, meanwhile the manufacturing working procedures are simplified, and manufacturing cost is lowered; a first elastic component is arranged in the wrench, the situation that the first elastic component makes contact with oil stain in use is avoided, and the wrench is more attractive in appearance; and a worm wheel is of a double-thread structure, the time spent in adjusting the distance of the wrench openings is shortened, and the torque borne by the worm wheel is increased as well.

Description

Spanner

Technical field

The present invention relates to a kind of spanner, belong to hand-operated tools field.

Background technology

Adjustable wrench generally comprises the fixed wrench jaw for clamping workpiece and adjustable wrench jaw, and adjustable wrench jaw can move toward and away from fixed wrench jaw; By adjusting the distance between fixed wrench jaw and adjustable wrench jaw, spanner can clamp a series of various sizes of workpiece, 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 on workpiece by spanner, use in environment at majority, pinch bar can only rotate less angle, it is therefore desirable to carries out continuous several times turn, just can screw or unscrew workpiece. Between twice turn, it is necessary to be deadlocked and temporarily removed from workpiece by spanner, be relocated onto on workpiece, could continuing operation, sometimes also need to use another Hand supplementary, therefore this operation is inconvenient for.

Ratchet spanner can simplify this operation, between repeatedly rotating, it is not necessary to removed from workpiece by ratchet spanner and be replaced in workpiece.

But be not easy in conjunction with ratchet and adjustable function in a spanner, this causes structure relative complex so that tool making is difficult and relatively costly, additionally when moment of torsion is bigger, spanner can be caused to damage.

Therefore, those skilled in the art are devoted to the ratchet spanner of simple in construction, in order to quickly turn workpiece, improve the work efficiency of spanner.

Summary of the invention

Because the drawbacks described above of prior art, the technical problem to be solved is to provide the spanner of a kind of simple in construction, realize continuous several times turn workpiece, remove without by spanner and be replaced on workpiece from workpiece, thus improving the work efficiency of spanner; Simultaneously because simple in construction, it is more firm that spanner can make, and does not easily cause spanner when moment of torsion is bigger and damages, and additionally simple structure also simplify the manufacturing process of spanner, reduces the cost of making.

The present invention provides a kind of spanner, fix with body including body be connected fixed wrench jaw, adjustable wrench jaw, be slidably connected assembly and the handle that is rotatably connected with body, adjustable wrench jaw is slidably connected with body formation by the assembly that is slidably connected, it is characterized in that, what spanner also included being connected with rotatable handle pulls a mouthful locking mechanism, pulling mouthful locking mechanism to move along the direction toward and away from fixed wrench jaw relative to body for limit slippage connection assembly, spanner also includes handle locking mechanism;

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

Spanner provided by the invention, 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 transferred to released state by lock-out state, the assembly that makes to be slidably connected can move along the direction toward and away from described fixed wrench jaw relative to body, so that adjustable wrench jaw can move to the direction toward and away from fixed wrench jaw under the effect of external force.

Now it is rotated further handle in the counterclockwise direction, no longer relatively rotates between handle and body, but make jaw rotate 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, increase along with the size of the hex nut being clamped between jaw, hex nut applies active force to adjustable wrench jaw with 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 mouth and slip over the summit of workpiece, arrive the position of next one clamping hex nut opposite face. In this position, handle rotates along the direction screwing workpiece relative to body, is namely rotated clockwise handle, and along with the rotation of handle, workpiece is tightened.

If needing 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, again it is rotated clockwise handle, screws workpiece, thus realizing continuous several times turn workpiece, remove and be replaced in without by spanner on workpiece from workpiece, improve the work efficiency of spanner.

Spanner provided by the invention also includes handle locking mechanism, and handle locking mechanism is in the locked position, and handle can not rotate relative to body, identical with common wrench.

It is appreciated that simple by spanner provided by the invention reversion use, it is possible to be used for screwing left hand thread workpiece or unscrewing right-handed thread workpiece.

It is described below 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, it is possible to what made by spanner is more firm, does not easily cause spanner when moment of torsion is bigger and damages; Simultaneously because simple in construction, also simplify the manufacturing process of spanner, reduce the cost of making.

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

Spanner provided by the invention, 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, increase along with the size of the hex nut being clamped between jaw, hex nut applies external force to adjustable wrench jaw with fixed wrench jaw, the movement of bearing pin is limited owing to the first end of push rod stretches into through hole, move thus limiting adjustable wrench jaw to the direction deviating from fixed wrench jaw, the distance between adjustable wrench jaw and fixed wrench jaw can not be increased, thus pull mouth and also cannot slip over the summit of workpiece, arrive the position of next one clamping hex nut opposite face.

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 with fixed wrench jaw, adjustable wrench jaw is moved to the direction deviating from fixed wrench jaw, increasing the distance between adjustable wrench jaw and fixed wrench jaw, thus slipping over the summit of workpiece, arriving the position of next one clamping hex nut opposite face.

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

Adopting such structure, the contact surface of push rod and bearing pin is plane, and the first end of push rod can reliably stop the slip of pivot pin, even if it is stuck and lost efficacy not easily cause spanner when moment of torsion is bigger, 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, in the length of axially worm gear of bearing pin less than the length of cavity so that when adjustable wrench jaw is subject to External Force Acting, it is possible to move to the direction deviating from fixed wrench jaw.

Further, sheathed first elastomeric element of the first end of bearing pin so that pull mouth and automatically reset when without External Force Acting.

Further, the first elastomeric element is arranged in the hole of body, and the first elastomeric element is built in body, it is to avoid the first elastomeric element contact greasy dirt in use, also makes spanner provided by the invention more attractive in appearance simultaneously.

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, by the second end of push rod and being rotatably connected that the first recess of handle is formed, drive push rod moves, so that the first end of push rod departs from the annular groove of bearing pin, pulls a mouthful locking mechanism and is transferred to released state by lock-out state.

Further, second end of push rod is cylindrical structural, and the axis of cylinder is vertical with the axis of push rod and parallel with the contact surface between push rod with bearing pin, adopts cylindrical structural, ensure that between push rod with handle be rotatably connected solid and reliable so that do not easily cause when moment of torsion is bigger spanner 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 includes arc-shaped profile so that being rotatably connected between push rod with handle can flexible rotating.

Further, the central angle that arc-shaped profile is corresponding is more than 180 degree so that the second end of push rod is not easily deviate from from the first recess of handle, be further ensured that between push rod with handle be rotatably connected solid and reliable so that do not easily cause when moment of torsion is bigger spanner damage.

Further, handle includes first side parallel with first body side face relative to the side in first body side face, also includes forming the second side less than 5 degree of angles with first body side face.

Owing to the first side of handle is parallel with first body side face, 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 be transferred to released state by lock-out state, simply screw workpiece.

Owing to the second side of handle is formed less than 5 degree of angles with first body side face, handle can be rotated in the counterclockwise direction relative to body, thus a mouthful locking mechanism will be pulled transferred to released state 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, fixed wrench jaw and adjustable wrench jaw is made to 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 is maintained at locking state, it is to avoid in use occur that locking is unreliable.

Further, worm gear adopts double thread structure, shortens the time regulating the spacing pulling mouth, increases the moment of torsion that worm gear can bear simultaneously.

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

Spanner provided by the invention also includes handle locking mechanism, and handle locking mechanism is in the locked position, and handle can not rotate relative to body, identical with common wrench, turn clockwise handle time, screw workpiece; During rotary handle counterclockwise, unscrew workpiece. Handle locking mechanism is in the unlocked position, and handle can rotate relative to body, turn clockwise handle time, screw workpiece; During rotary handle counterclockwise, a mouthful locking mechanism will be pulled and transferred to released state 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, handle locking mechanism includes push button and fixture block, and push button is for moving handle locking mechanism between latched position and unlocked position, and fixture block is for limiting the handle rotation relative to body.

Further, the second recesses fit of fixture block and handle, to limit the handle rotation 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, spanner provided by the invention has the advantages that

(1) when handle rotates in the counterclockwise direction relative to body, pull a mouthful locking mechanism and transferred to released state by lock-out state, increase the distance between fixed wrench jaw and adjustable wrench jaw under external force, thus crossing the summit of workpiece, realize continuous several times turn workpiece, remove without by spanner and be replaced on workpiece from workpiece, thus improving the work efficiency of spanner;

(2) simple in construction, it is possible to bear high torque, simplifies manufacturing process simultaneously, reduces cost of manufacture;

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

(4) worm gear adopts double thread structure, has both shortened the time regulating the spacing pulling mouth, increases again the moment of torsion that worm gear can bear.

Below with reference to accompanying drawing, the technique effect of the design of the present invention, concrete structure and generation is described further, to be fully understood from the purpose of the present invention, feature and effect.

Accompanying drawing explanation

Fig. 1 is the front view of the spanner of one embodiment of the present of invention;

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;

Mouthful locking mechanism of pulling that Fig. 6 is the spanner shown in Fig. 1 is in the partial sectional view of released state;

Fig. 7 is the perspective view of the push rod pulling 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 the locked 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 the locked position.

Detailed description of the invention

As it is shown in figure 1, the spanner 1 of one embodiment of the present of invention, including: 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 to user's gripping, and handle 3 can include injection moulding sleeve pipe to improve the comfort level gripped.

Fixed wrench jaw 4 is fixing with body 2 to be connected, it is also possible to one-body molded with body 2, in the present embodiment, fixed wrench jaw 4 is one-body molded with body 2.

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

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

Body 2 includes approximate rectangular cavity 22.

Body 2 also includes elongated chute 23, and chute 23 extends to the lower section of fixed wrench jaw 4 from a side 201 of body 2 to body 2, and 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, in order to hold adjustable wrench jaw 5. Chute 23 is set to: adjustable wrench jaw 5, along the direction pulling actinal surface 41 being perpendicular to fixed wrench jaw 4, is moved toward and away from fixed wrench jaw 4, and chute 23 connects with cavity 22.

As it is shown on figure 3, adjustable wrench jaw 5 is installed on body 2, is formed with body 2 and be slidably connected. Adjustable wrench jaw 5 includes pulling actinal surface 51, pulls actinal surface 51 and pulls actinal surface 41 towards fixed wrench jaw 4, contacts workpiece when wrench operated, and 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 includes cervical region 52 and flange 53, and flange 53 can slide in chute 23, and owing to adjustable wrench jaw 5 has cervical region 52, chute 23 also has similar cross section, and simply size is slightly larger; When adjustable wrench jaw 5 is moved back and forth toward and away from fixed wrench jaw 4, adjustable wrench jaw 5 will not be deviate from from the opening part of chute 23 top edge.

Dentalation on flange 53 constitutes 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, it is prevented that adjustable wrench jaw 5 skids off from chute 23.

As it is shown on figure 3, worm gear 7 is arranged in cavity 22, it 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, and the rotation translation activity of such worm gear 7 is pulled mouth 5 and moved toward and away from fixed wrench jaw 4.

Bearing pin 6 is axially, the length of worm gear 7 is less than the length of cavity 22, when having External Force Acting in when pulling actinal surface 51 of adjustable wrench jaw 5, 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 pulled between actinal surface 41 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 includes two sections of through holes that diameter is different, less near the through-hole diameter of cavity 22, and the through-hole diameter away from cavity 22 is relatively big, 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 driving adjustable wrench jaw 5 to reset.

Spring 9 is built in the through hole 242 of body 2, it is to avoid in use, spring 9 contacts greasy dirt, also makes spanner provided by the invention more attractive in appearance simultaneously.

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, the through hole 25 of push rod 10 traverse body 2, first end 101 of push rod 10 stretches into through hole 241 and stops bearing pin 6 to slide, and pulls a mouthful locking mechanism and is in the lock state, and 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, by the second end 102 of push rod 10 and being rotatably connected that the recess 31 of handle 3 is formed, push rod 10 is driven to move, so that the first end 101 of push rod exits through hole 241, bearing pin 6 can slide, and pulls a mouthful locking mechanism and is transferred to released state by lock-out state.

Spanner in the present embodiment is used for the right-handed thread securing member of standard, and 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, being 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 is transferred to released state by lock-out state.

Now it is rotated further handle 3 in the counterclockwise direction, no longer relatively rotate between handle and body, but make jaw rotate 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, increase along with the size of the hex nut 19 being 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 mouth and slip over the summit of hex nut 19, arrive the position of next one clamping hex nut 19 opposite face. in this position, handle 3 rotates along the direction screwing workpiece relative to body 2, is namely rotated clockwise handle, and along with the rotation of handle 2, hex nut 19 is tightened.

If needing 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, again it is rotated clockwise handle 3, screws hex nut 19, thus realizing continuous several times turn hex nut 19, without removing and be replaced on hex nut 19 by spanner from hex nut 19, improve the work efficiency of spanner.

It is appreciated that simple by spanner provided by the invention reversion use, it is possible to be used for screwing left hand thread workpiece or unscrewing right-handed thread workpiece.

As it is shown in fig. 7, the first end 101 of push rod is by the cylinder of plane 1011 truncated part, this plane 1011 is without the axis of push rod 10 and parallel with the axis of push rod 10 so that the contact surface of push rod 10 and bearing pin 6 is plane.

Adopt such structure, the contact surface of push rod 10 and bearing pin 6 is plane, first end 101 of push rod 10 can reliably stop the slip of pivot pin 6, even if it is stuck and lost efficacy not easily cause spanner when moment of torsion is bigger, 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 structural, and the axis of cylinder is vertical with the axis of push rod 10 and parallel with the contact surface between push rod 10 with bearing pin 6, it is ensured that the first end 101 of push rod 10 contacts with pivot pin 6 with plane all the time; Adopt cylindrical structural, it is ensured that being rotatably connected between push rod with handle is solid and reliable so that do not easily cause spanner when moment of torsion is bigger and damage.

First recess 31 of handle 3 includes arc-shaped profile so that being rotatably connected between push rod 10 with handle 3 can flexible rotating.

Central angle corresponding to arc-shaped profile is more than 180 degree so that the second end 102 of push rod 10 is not easily deviate from from the first recess 31 of handle 3, be further ensured that between push rod 10 with handle 3 be rotatably connected solid and reliable so that do not easily cause spanner when moment of torsion is bigger and damage.

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

Owing to 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 be transferred to released state by lock-out state, simply screw workpiece.

Owing to the second side 302 of handle 3 is formed less than 5 degree of angles 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 transferred to released state 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 mouth and cross the summit of 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 be maintained at locking state, it is to avoid in use occur that locking is unreliable.

As it is shown in figure 1, spanner provided by the invention also includes handle locking mechanism, if user need not use ratcher function, it is possible to handle locking mechanism is 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 the locked position, and as shown in Figure 8, handle 3 can not rotate relative to body 2; Handle locking mechanism 11 is positioned at one end of the remotely located pin 8 of through hole, and handle locking mechanism 11 is in the unlocked position, as it is shown in figure 9, handle 3 can rotate around alignment pin 8 relative to body 2.

Handle locking mechanism includes push button, fixture block 111 and spring; Push button is for switching handle locking mechanism 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 the mobile speed 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 double thread structure, has both shortened the time regulating the spacing pulling mouth, increases again the moment of torsion that worm gear can bear.

Spanner provided by the invention, when handle rotates in the counterclockwise direction relative to body, pull a mouthful locking mechanism and transferred to released state by lock-out state, increase the distance between fixed wrench jaw and adjustable wrench jaw under external force, thus crossing the summit of workpiece, realize continuous several times turn workpiece, remove without by spanner and be replaced on workpiece from workpiece, thus improving the work efficiency of spanner; Simple in construction, it is possible to bear high torque, simplifies manufacturing process simultaneously, reduces cost of manufacture; Built-in first elastomeric element, it is to avoid the first elastomeric element contact greasy dirt in use, also makes spanner more attractive in appearance simultaneously; Worm gear adopts double thread structure, has both shortened the time regulating the spacing pulling mouth, increases again the moment of torsion that worm gear can bear.

The preferred embodiment of the present invention described in detail above. Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work. Therefore, all technical staff in the art, all should in the claims of the present invention under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (20)

1. a spanner, fix with described body including: body be connected fixed wrench jaw, 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, what described spanner also included being connected with described rotatable handle pulls a mouthful locking mechanism, described mouthful locking mechanism of pulling moves along the direction toward and away from described fixed wrench jaw relative to described body for the assembly that is slidably connected described in limiting, and described spanner also includes handle locking mechanism;

When described handle rotates in the counterclockwise direction relative to described body, pulling a mouthful locking mechanism and transferred to released state by lock-out state described in described handle drives, 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 characterised in that described body and described fixed wrench jaw are integrated.

3. spanner as claimed in claim 1 or 2, it is characterised 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 includes bearing pin and the worm gear being set on described bearing pin, described bearing pin is arranged in the through hole of described body, it is characterized in that, 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, 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, described first end of described push rod is by the cylinder of a plane truncated part, and described plane is without the axis of described push rod and parallel with the axis of described push rod so that the contact surface of described push rod and described bearing pin is plane.

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

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

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

9. spanner as claimed in claim 4, it is characterised 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 characterised in that described second end of described push rod is cylindrical structural, and the axis of described cylindrical structural is vertical with the axis of described push rod and parallel with the contact surface between described push rod with described bearing pin.

11. spanner as claimed in claim 9, it is characterised in that described first recess of described handle includes arc-shaped profile.

12. spanner as claimed in claim 11, it is characterised in that central angle corresponding to described arc-shaped profile is more than 180 degree.

13. spanner as claimed in claim 4, it is characterised in that described handle includes first side parallel with described first body side face relative to the side in described first body side face, and forms the second side less than 5 degree of angles with described first body side face.

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

15. spanner as claimed in claim 4, it is characterised in that described worm gear adopts double thread structure.

16. spanner as claimed in claim 1, it is characterised in that described handle locking mechanism is in the locked 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. spanner as claimed in claim 16, it is characterized in that, described handle locking mechanism includes push button and fixture block, and described push button is for moving described handle locking mechanism between latched position and unlocked position, and described fixture block is for limiting the rotation relative to described body of the described handle.

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

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

20. spanner as claimed in claim 19, it is characterised 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.