CN202106312U - Fast bench vice - Google Patents

Abstract

The utility model provides a fast bench vice, which comprises a clamping system, a transmission system and a driving system. The transmission system adopts a gear and rack structure, compared with a traditional bench vice, clamping efficiency of a workpiece is greatly improved. Furthermore, a driving and locking device of the bench vice can achieve instantaneous lock of clamping force, thereby avoiding looseness of a clamped workpiece, being capable of removing a lock state, and loosening the clamped workpiece quickly.

Description

Fast tighten vice

Technical field

The utility model belongs to mechanical field, relates to can be applicable in processing, production and the maintenance field, workpiece is carried out utensil, especially the bench vice structure of clamping.

Background technology

The bench vice that uses in the market all is through the threaded screw rod transmission, and relies on threaded screw rod and nut that the chucking power of bench vice is locked.Fig. 1 is a kind of conventional table vice sketch map; The conventional table vice relies on the method for rotary threaded screw mandrel that mobile vice body is advanced or retreats; Screw mandrel whenever rotates a circle, the displacement that moves vice body be a pitch of screw mandrel (2.5～5mm), move therefore that briquetting advances or the translational speed retreated is relatively slow; Carry out fast at needs under the situation of clamping or replacing clamping thickness, operating efficiency is lower.Existing part fast tighten vice also only is on motion thread screw mandrel and locking nut, to improve, and the advance and retreat speed that makes bench vice move briquetting increases, but need will move the vice body propelling or pull out inconvenient operation with hand.

The utility model content

The utility model purpose is to provide a kind of bench vice rapidly and efficiently, through the rack-and-pinion transmission, makes the clamping efficient of workpiece than traditional bench vice raising by a relatively large margin arranged; In addition, the driving locking device of this bench vice can be realized preventing instantaneous locked to chucking power that caught workpiece is loosening, and can remove locking state by transient solution, unclamp caught workpiece fast.

For achieving the above object, the solution of the utility model is:

A kind of gear driven type is bench vice rapidly and efficiently, comprising: mounting and clamping system, transmission system, drive system, this transmission adopted gear & rack structure.

Further, this drive system comprises the handlebar head, and this gear & rack structure comprises gear shaft, and the computing formula of the clamping force that is obtained on the bench vice is: F2=F1* (L/R)

Wherein: F2 is the clamping force that the bench vice upper jaw is obtained; F1 is a tangential driving force on the handlebar head;

L is the driving force arm lengths; R is the reference radius of gear shaft.

This mounting and clamping system comprises mobile vice body, and this drive system comprises the handlebar head, and this gear & rack structure comprises gear shaft, and the computing formula of clamping speed is:

v＝h/t＝(∫(R*sinθ))/t

Wherein: v is for moving the translational speed of vice body; H is for moving the displacement of vice body; R is the reference radius of gear shaft; θ is the angle of handle rotation; T is the handle rotation θ required time of angle.

This drive system comprises elastic shaft, spline, roller, drives pawl, brake disc, and set: the coefficient of friction between brake disc and the roller is ζ, and setting the power that is applied on the single roller through spline because of the elastic shaft distortion is F; Set roller when the wedge shape dead-centre position; Stressed angle is x °, and promptly power F is x ° with the vertical angle that is connected roller center line and disc centres line, and power F is through the stress point of roller action at brake disc; Be decomposed into radial component F1 and tangential component F2, then:

F1＝F*cos?x°

F2＝F*sin?x°

X ° of frictional force f=ζ * F1=ζ * F*cos between roller and the brake disc

When f >=F2, promptly x ° >=F*sin of ζ * F*cos is x °, x ° of x ° >=sin of ζ * cos, and simplifying the back is ζ >=tgx °; Roller promptly is in the nature locking state, and under the situation that does not have other external force effects, roller can't prolong clockwise direction and move, and spline also just can't turn round by clockwise direction because of roller is in locking state.

This moment is as long as clockwise direction rotates and to drive pawl, and driving the power that pawl acts on the roller is F3, and when F3+F2＞f, roller just can leave the wedge shape dead-centre position, removes this locking state rapidly.Therefore the adequate condition of removing locking state is:

F3＞f-F2, i.e. F3＞F (x ° of x °-sin of ζ * cos)

When manufacturing and designing, select suitable coefficient of friction ζ and loading angle x °, can make the driving locking device instantaneous locked, simultaneously can be through on handle, applying external force F3, transient solution removes the locking state that drives locking device.

Select the material and the machining accuracy of brake disc and roller, confirm corresponding brake disc and the coefficient of friction ζ between the roller, can know, can make f-F2 enough little, just can make that the power F3 that removes locking state is enough little through design by top computing formula.

This mounting and clamping system comprises jaw, moves vice body, fixing vice body; Two jaws are fixed on sunk screw respectively and move on one's body vice body and the fixation clamps; Move in the gathering sill that inserts fixing vice body in the vice body bottom, gathering sill is used for mobile vice body moved forward and backward and leads and locate.

This transmission system comprises mobile vice body, tooth bar, sunk screw, gear shaft, elastic shaft; Axle sleeve, tooth bar is fixed on the bottom of moving vice body through sunk screw, and gear shaft adopts matched in clearance to insert axle sleeve; Axle sleeve inserts the fixedly axis hole of vice body; Gear shaft and tooth bar engagement, the turning gear wheel shaft can drive mobile vice body and move forward and backward.

This drive system comprises the driving locking device, and this driving locking device comprises elastic shaft, first axle key, second axle key, spline, driving locking device spring, thimble, roller, drives pawl, brake disc, is fixed on one's body the fixation clamps through screw; Elastic shaft inserts in the gear shaft, and its miner diameter end is fixed on the gear shaft through first axle key, and spline is fixed on the bigger diameter end of elastic shaft through second axle key; Drive the locking device spring and be installed in the hole of spline with thimble, spline with drive pawl and be installed in the brake disc, roller is arranged in spline and the formed wedge shape space of brake disc, under the elastic force effect of driving locking device spring, keeps in touch with thimble.

This drive system also comprises handle apparatus; This handle apparatus comprises handle spring, shoulder screw, hole back-up ring, handle head, handlebar, handlebar head; This handle head is fixed on through spring, shoulder screw and drives on the pawl, and shoulder screw passes handle spring, handle is assemblied in drives on the pawl; Handle head meshes through tooth with driving pawl, the moment that manually applies on the handlebar head is delivered to drives on the pawl.

Be provided with a segment length between this shoulder screw and handle spring and the handle head as free travel.

Owing to adopted such scheme, the beneficial effect of the utility model is: replace traditional screw mandrel transmission through gear drive, its operating efficiency can reach more than 22 times of prior art; Driving locking device in the utility model both can carry out instantaneous lockedly automatically to chucking power, can remove locking state rapidly again; The utility model makes manipulating of bench vice easier through the handle of side.

Description of drawings

Fig. 1 is a conventional table vice sketch map.

Fig. 2 is the overall structure figure of a kind of embodiment of the utility model.

Fig. 3 is a composition structural representation embodiment illustrated in fig. 2

Fig. 4 is the composition sketch map of the utility model quick-clamping transmission system part embodiment illustrated in fig. 2.

Fig. 5 is a driving locking device sketch map embodiment illustrated in fig. 2.

Fig. 6 is that driving locking device shown in Figure 5 is formed structural representation

Fig. 7 is that driving locking device shown in Figure 5 is locked and remove locked mechanics principle figure

Fig. 8 is a handle free adjustment structural representation embodiment illustrated in fig. 2.

Fig. 9 is the profile of handle shown in Figure 8.

1-moves vice body, 11-jaw, 12-A sunk screw, 2-tooth bar, 21-B sunk screw, 3-cover plate; The 31-cover screw, 4-is vice body fixedly, and 41-is the vice body gathering sill fixedly, and 42-is the vice body axis hole fixedly, 5-gear shaft, 6-elastic shaft; 61-first axle key, 62-second axle key, the 63-axle sleeve, 7-drives locking device, the 71-spline, 72-drives the locking device spring; The 73-thimble, the 74-roller, 75-drives pawl, 76-brake disc, 77-screw, 8-handle; The 81-handle spring, 82-shoulder screw, 83-hole back-up ring, 84-handle head, 85-handlebar, 86-handlebar head.

The specific embodiment

Below in conjunction with the accompanying drawing illustrated embodiment the utility model is further described.

The gear driven type of the utility model is bench vice rapidly and efficiently, and overall structure sees also Fig. 2, and composition and structure see also Fig. 3.

A kind of gear driven type is bench vice rapidly and efficiently; Comprise: mounting and clamping system, transmission system, drive system; This transmission adopted gear & rack structure; Driving locking device can fast driving, instantaneous locked and transient solution removes locking state, can regulate work angle arbitrarily according to mode of operation.

This mounting and clamping system comprises and press to move vice body 1, jaw 11, fixing vice body 4; Two jaws 11 are fixed on A sunk screw 12 respectively and move vice body 1 and fixation clamps 4 on one's body; Move the vice body bottom and insert fixedly in the vice body gathering sill 41, fixedly vice body gathering sill 41 is used for mobile vice body 1 moved forward and backward and leads and locate.

This transmission system comprises mobile vice body 1, tooth bar 2, B sunk screw 21, gear shaft 5, elastic shaft 6; Tooth bar 2 is fixed on the bottom of moving vice body 1 through B sunk screw 21; Gear shaft 5 adopts matched in clearance to insert axle sleeve 63, and axle sleeve 63 inserts fixedly vice body axis hole 42, gear shaft 5 and tooth bar 2 engagements; Turning gear wheel shaft 5 can drive mobile vice body 1 and fixedly move forward and backward in the vice body gathering sill 41.

This transmission system is owing to adopt the kind of drive of rack-and-pinion, and its transmission speed and efficient are much higher than feed screw nut's the kind of drive.

This drive system comprises the driving locking device; This driving locking device 7 comprises elastic shaft 6, first axle key 61, second axle key 62, spline 71, drives locking device spring 72, thimble 73, roller 74, drives pawl 75, brake disc 76, is fixed on fixedly on the vice body 4 through screw 77.

As shown in Figure 3, elastic shaft 6 inserts in the gear shaft 5, and its miner diameter end is fixed on the gear shaft 5 through first axle key 61, and spline 71 is fixed on the bigger diameter end of elastic shaft 6 through second axle key 62.

Like Fig. 5 and shown in Figure 6; Driving locking device spring 72 is installed in the hole of spline 71 with thimble 73; Spline 71 with drive pawl 75 and be installed in the brake disc 76; Roller 74 is arranged in spline 71 and the brake disc 76 formed wedge shape spaces, under the elastic force effect that drives locking device spring 72, keeps in touch with thimble 73.

This driving locking device can in time pass to gear shaft 5 with driving moment, in case clamped by the workpiece of clamping, promptly can be instantaneous that chucking power is locked, guarantee by the workpiece of clamping not lax.When the handle reverse rotation, can remove locking state by transient solution simultaneously, unclamp fast by the workpiece of clamping.

This drive system comprises handle 8, and this handle 8 comprises handle spring 81, shoulder screw 82, hole back-up ring 83, handle head 84, handlebar 85, handlebar head 86, and handle 8 is fixed on through spring 81, shoulder screw 82 and drives on the pawl 75.

As shown in Figure 9, shoulder screw 82 passes handle spring 81, handle 8 is assemblied in drives on the pawl 75; Handle head 84 with drive pawl 75 through the tooth engagement; The moment that manually applies on the handlebar head 86 is delivered to drives on the pawl 75, the free travel between shoulder screw 82 and handle spring 81 and the handle head 84 can guarantee handle head 84 is broken away from and the tooth engagement of driving pawl from driving pawl 75 and extracting; With handle 8 rotation arbitrarily angled after; Release handle 84, the elastic force effect of handle spring 81 can be pressed to handle head 84 and driven pawl 75, recovers handle head 84 and drives the tooth engagement between the pawl 75.

This handle can any application of force angle of free adjustment, when the workpiece of clamping different-thickness, is convenient to the thickness of operating personnel according to clamping workpiece, and handle is adjusted to the position of suitable operation.

Gear driven type rapidly and efficiently bench vice to the clamping process of workpiece:

Rotary handle 8 applies tangential F1 on the manual end handlebar head 86 of handle 8, on lift handlebar 85, through handle head 84 and drive locking device and drive the engaging tooth between the pawl 75, driving moment is passed to drives locking device 7;

Drive locking device 7 through second axle key 62, driving moment is passed to elastic shaft 6; Elastic shaft 6 passes to gear shaft 5 through first axle key 61 with driving moment;

As shown in Figure 4, gear shaft 5 and tooth bar 2 are owing to be meshing relation, and driving moment passes to tooth bar 2 through gear shaft 5, and tooth bar 2 drives mobile vice body 1 and moves ahead, and will be clamped between the jaw 11 by the workpiece of clamping (drawing among the figure for simplicity).The computing formula of clamping force is:

F2＝F1*(L/R)

The clamping force that is obtained on the F2---bench vice

F1---manually is applied to the tangential force on the handlebar head 86

L---decreased food (air line distance between the axis of handlebar head 86 centers and gear shaft 5)

The reference radius of R---gear shaft 5

In the utility model embodiment, if the value of setting L/R greater than 25, so clamping force F2 is more than 25 times of downforce F1 that manually apply.When F1=50Kgf, the clamping force F2 of the utility model is greater than 1250Kgf.

The quick-clamping Principles of Regulation of stroke (clamping thickness):

As shown in Figure 4, the critical piece of transmission system comprises mobile vice body 1, tooth bar 2, gear shaft 5, elastic shaft 6, drives locking device 7, handle 8 etc.,

Pass through the mode transmission of rack-and-pinion between gear shaft 5 and the tooth bar 2.The number of teeth of setting gear shaft 5 is n, and reference radius is R, by rack-and-pinion transmission calculation method, can draw when the every anglec of rotation of handle be θ, the distance h that tooth bar 2 moves is:

h＝∫(R?x?sinθ)

The displacement of h-tooth bar 2

The reference radius of R-gear shaft 5

The angle of θ-handle 8 rotations

Handle 8 rotates a circle, corresponding tooth bar 2 displacement be 2 π R, if the minimal design value of R is 13mm among the utility model embodiment, promptly corresponding handle 8 rotates a circle, it is 81.64mm that tooth bar 2 drives the displacement that moves vice body 1.

The bench vice of contrast prior art, its bench vice handle rotates a circle, and the distance that mobile vice body advances is a pitch of screw mandrel, and the pitch of bench vice wire rod thread is 2.5～5mm usually.Can calculate thus:

81.64/2.5＝32.656

81.64/5＝16.328

Therefore can reach a conclusion: the clamping speed of the utility model is more than 16～32 times of prior art in this embodiment, can increase work efficiency significantly.

Clamping force instantaneous locked and unclamp principle:

Be held after workpiece is moved vice body 1 and fixedly the jaw between the vice body 2 11 clamps, after the power that guarantee to be applied to handlebar head 86 was unclamped, clamping force still remained unchanged, and promptly behind the F1=0, the value of F2 is constant.This function realizes through the interaction relation that drives between locking device 7 and the elastic shaft 6.

The miner diameter end of elastic shaft 6 is fixed on the gear shaft 5 through first axle key 61, and is as shown in Figure 6, and bigger diameter end is fixed on through second axle key 62 and drives on the inner spline 71 of locking device.

As shown in Figure 7, three rollers 74 that circumferentially are uniformly distributed with are in spline 71 and brake disc 76 formed three wedge shape spaces respectively, and under the driving of handle 8, spline 71 can be with elastic shaft 6 freely to clockwise rotate.After clamping workpiece, elastic shaft 6 can not continue freely to clockwise rotate, after the clamping force of clamping work pieces is enough; Elastic shaft 6 forms corresponding deflection; After the release handle, three rollers 74 that circumferentially are uniformly distributed with on the spline are respectively by the elastic thrust effect of three springs that circumferentially are uniformly distributed with 72 and three thimbles that circumferentially are uniformly distributed with 73 at this moment; Withstand roller 74, roller 74 is stuck in the wedge shape dead-centre position of spline and brake disc 76.

As shown in Figure 7:

The coefficient of friction of setting between brake disc 76 and the roller 74 is ζ

Set and consider roller 74 when the wedge shape dead-centre position, stressed angle is illustrated in figure 7 as x °

The power that is applied on the single roller 74 through spline 71 because of elastic shaft 6 distortion is F

Power F acts on the stress point of brake disc 76 through roller 74, is decomposed into radial component F1 and tangential component F2

F1＝F*cos?x°

F2＝F*sin?x°

X ° of frictional force f=ζ * F1=ζ * F*cos between roller 74 and the brake disc 76

When f >=F2, roller 74 promptly is in the nature locking state, and under the situation that does not have other external force effects, roller 74 can't prolong counterclockwise and move, and spline 71 also just can't counterclockwise turn round because of roller 74 is in locking state.

This moment is as long as counterclockwise rotate and drive pawl 75, and driving the power that pawl 75 acts on the roller 74 is F3, and when F3+F2 >=f, roller 74 just can leave the wedge shape dead-centre position, removes this locking state rapidly.

According to above principle, just can select suitable material according to drive unit 7 sizes of design, determine suitable coefficient of friction ζ, go out the suitable stressed angle x of spline 71 according to coefficient of friction ζ calculation Design then.

For example: brake disc 76, spline 71 and roller 74 are all selected bearing steel GCr15 for use; Coefficient of friction ζ=0.012 between spline 71 and the roller 74, the external diameter value φ 50h7 of spline 71 are being arranged under the situation of oil lubrication; Brake disc 76 internal diameter value φ 50H7, the diameter value φ 8h7 of roller 74.Set roller 74 and act on the power F=1000N on the brake disc 76, can know that by above principle and formula the adequate condition of natural locking state is:

f≥F2

＝＞ζ*F*cos?x°≥F*sin?x

＝＞ζ≥tg?x°

When getting ζ=0.012, can calculate x≤0.6875 °

As shown in Figure 7, the stressed angle (power F and the vertical angle that is connected roller center line and disc centres line) of getting spline 71 during design can reach instantaneous locking state during for x °≤0.6875 °.

Actual design adds gets x °=0.67 ° man-hour, can calculate:

0.67 °=11.999N of x °=0.012*1000*cos of frictional force f=ζ * F*cos

0.67 °=11.693N of x °=1000*sin of tangential component F2=F*sin

This moment, f-F2=0.306N satisfied the locking state condition.

Because it is very little through the power that thimble 73 is applied on the roller 74 to drive locking device spring 72, have only about 10N, act on power F3 on the roller 74 greater than 10.306N as long as therefore drive pawl 75, can remove locking state by transient solution.

Do not having external force to interfere under the situation of removing roller 74 locked angles, as can beappreciated from fig. 7, spline 71 can only counterclockwise rotate all the time, can't the clockwise direction rotation.After so just having guaranteed to act on openhanded the opening of power on the handlebar head 86, move vice body 1 and fixedly 11 clamping forces of the jaw between the vice body 2 can keep instantaneous locking state.

The instantaneous principle of unclamping of clamping force:

As shown in Figure 6; Press down the manual end handlebar head 86 of handle 8; Through handle head 84 and drive the engaging tooth between the pawl 75 that drives of locking device 7, with driving moment pass to drive locking device 7 drive pawl 75, drive pawl 75 and overcome the elastic force of spring 72 and thimble 73 and the frictional force between roller 74 and spline 71 and the brake disc 76; Promote the stop that roller 74 breaks away between spline 71 and the brake disc 76, locking mechanism is disengaged.Continue to press down the manual end handlebar head 86 of handle 8, drive pawl 75 and promote roller 74 and spline 71,, make mobile vice body 1 hightail fixedly vice body 4, realize being unclamped by instantaneous by the workpiece of clamping through transmission system.

Realize the freely regulated structural principle of lever operated angle:

After confirming clamping thickness; Rotary handle 8, with mobile vice body 1 and fixedly the jaw between the vice body 4 11 draw back to suitable distance, the reverse rotation handle 8 then; The time jaw 11 piece-holder is lived, at this moment handlebar 85 residing positions not necessarily are fit to operating personnel and carry out reinforcing and lock.If handlebar 85 residing angle positions are not easy to the locking of operating personnel's application of force; Can extract handle head 84 this moment from the pawl 75 that drives that drives locking device 7; Handle 8 is rotated to the position of suitable operation; Unclamp then, handle head 84 will automatically revert to and drive on the pawl 75 under the effect of spring 81 and shoulder screw 82.

Like Fig. 8 and shown in Figure 9, handle 8 is fixed on driving on the pawl 75 of locking drive unit through spring 81 and shoulder screw 82, and it is loosening for preventing shoulder screw 82 that a hole back-up ring 83 has been installed on the handle 8.Under the free state, spring 81 is pressed to handle head 84 and is driven pawl 75, makes handle head 84 and drive pawl 75 to be meshing with each other.Like the angle position of need adjustment handle 8, only need handle head 84 is extracted, intermeshing tooth is broken away from, and the design of the drift of shoulder screw 82 need not be become flexible shoulder screw 82, just in time meet engaging tooth and break away from required displacement.Any then rotary handle head 84 gets final product until the operating habit position that arrives the match operation personnel.

The above-mentioned description to embodiment is can understand and use the utility model for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the utility model is not limited to the embodiment here, and those skilled in the art are according to the announcement of the utility model, and not breaking away from the improvement that the utility model category made and revise all should be within the protection domain of the utility model.

Claims (9)

1. fast tighten vice, comprising: mounting and clamping system, transmission system, drive system is characterized in that: this transmission adopted gear & rack structure.

2. fast tighten vice according to claim 1; It is characterized in that: this drive system comprises the handlebar head, and this gear & rack structure comprises gear shaft, and set: F2 is the clamping force that the bench vice upper jaw is obtained; F1 is a tangential driving force on the handlebar head; L is the driving force arm lengths, and R is the reference radius of gear shaft, and the mutual relational expression of then said key element is: F2=F1* (L/R).

3. fast tighten vice according to claim 1 is characterized in that: this mounting and clamping system comprises mobile vice body, and this drive system comprises handle, and this gear & rack structure comprises gear shaft, sets: v is for moving the translational speed of vice body; H is for moving the displacement of vice body; R is the reference radius of gear shaft; θ is the angle of handle rotation; T is the handle rotation θ required time of angle, and the mutual relational expression of then said key element is:

v＝h/t＝(∫(R*sinθ))/t。

4. fast tighten vice according to claim 1; It is characterized in that: this drive system comprises elastic shaft, spline, roller, drives pawl, brake disc; Set: the coefficient of friction between brake disc and the spline is ζ, and setting the power that is applied on the single roller through spline because of the elastic shaft distortion is F, sets roller when the wedge shape dead-centre position; Stressed angle is x °; Be that power F is x ° with the vertical angle that is connected roller center line and disc centres line, power F is decomposed into radial component F1 and tangential component F2 through the stress point of roller action at brake disc; Counterclockwise rotate and drive pawl, driving the power that pawl acts on the roller is F3, then:

F1＝F*cos?x°

F2＝F*sin?x°

X ° of frictional force f=ζ * F1=ζ * F*cos between roller and the brake disc

Roller is in the desired condition of nature locking state: f >=F2, promptly ζ >=tgx °;

The adequate condition of then removing locking state is: F3+F2＞f, that is:

F3＞F(ζ*cos?x°-sin?x°)。

5. fast tighten vice according to claim 1; It is characterized in that: this mounting and clamping system comprises jaw, moves vice body, fixing vice body; Two jaws are fixed on sunk screw respectively and move on one's body vice body and the fixation clamps, move the insertion of vice body bottom fixedly in the gathering sill of vice body.

6. fast tighten vice according to claim 1; It is characterized in that: this transmission system comprises mobile vice body, tooth bar, sunk screw, gear shaft, elastic shaft; Axle sleeve, tooth bar is fixed on the bottom of moving vice body through sunk screw, and gear shaft adopts matched in clearance to insert axle sleeve; Axle sleeve inserts the fixedly axis hole of vice body, gear shaft and tooth bar engagement.

7. fast tighten vice according to claim 1; It is characterized in that: this drive system comprises the driving locking device; This driving locking device comprises elastic shaft, first axle key, second axle key, spline, driving locking device spring, thimble, roller, drives pawl, brake disc, is fixed on one's body the fixation clamps through screw; Elastic shaft inserts in the gear shaft, and its miner diameter end is fixed on the gear shaft through first axle key, and spline is fixed on the bigger diameter end of elastic shaft through second axle key; Drive the locking device spring and be installed in the hole of spline with thimble, spline and drive pawl and be installed in the brake disc, roller is arranged in spline and the formed wedge shape space of brake disc and with thimble and keeps in touch.

8. fast tighten vice according to claim 1; It is characterized in that: this drive system also comprises handle apparatus; This handle apparatus comprises handle spring, shoulder screw, hole back-up ring, handle head, handlebar, handlebar head, and this handle head is fixed on through spring, shoulder screw and drives on the pawl, and shoulder screw passes handle spring; Handle is assemblied in drives on the pawl, handle head with drive pawl through the tooth engagement.

9. fast tighten vice according to claim 8 is characterized in that: be provided with a segment length between this shoulder screw and handle spring and the handle head as free travel.

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