CN2863323Y - Clamping head with reversal arresting device - Google Patents
Clamping head with reversal arresting device Download PDFInfo
- Publication number
- CN2863323Y CN2863323Y CNU2005201277179U CN200520127717U CN2863323Y CN 2863323 Y CN2863323 Y CN 2863323Y CN U2005201277179 U CNU2005201277179 U CN U2005201277179U CN 200520127717 U CN200520127717 U CN 200520127717U CN 2863323 Y CN2863323 Y CN 2863323Y
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- Prior art keywords
- lock pawl
- jaw
- stop cover
- nut
- stop
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Abstract
The utility model discloses a chuck with a reversing stop device, comprising a chuck body, whose end is connected to an actuating shaft of source of power and provided with multiple equant slant holes in circumferential direction; multiple jaws are provided in the matching slant holes on the chuck body, and the lateral surface is provided with thread; nuts encased on the chuck body, whose inner face is provided with thread to match with the thread of the jaws; coats encased on the chuck body and connecting to and driving nuts; a reversing stop device encased on the chuck body and rotating with the coats synchronously, on which is provided at least one elastic reversing stop jaw, when rotating coats in first direction, drawing the jaw back to the preset position, the reserving stop jaw obstruct the side of the clamp jaw. The utility model can complete the reserving stop action reliably to prevent the phenomenon of friction and seizure between jaws and nuts with an elastic reversing stop jaw rotating with the coats synchronously.
Description
Technical field
The utility model relates to a kind of throw clamping device, specifically a kind of chuck with reverse stopping device, this reverse stopping device stops the relative nut of jaw to be rotated further, and avoids the interior annular cut-off plane excessive compression of screw thread of jaw screw thread clearing end plane and nut and produces excessive frictional force and stuck phenomenon.
Background technology
Traditional throw clamping device is used for clamping various throws, for example drill bit, reamer, screw tap etc.These throws claim chuck again.Typical chuck, for example drill chuck comprises clamp, a plurality of (for example, three) jaw, nut, overcoat etc., also comprises the back cover sometimes.In addition, some chuck also comprises bearing and bearing gasket, is used to reduce friction.Overcoat and bearing gasket respectively with the clamp tight fit.Three jaws are installed in respectively in the inclined hole of three mutual five equilibriums in the clamp.Nut is arranged in the nut groove of clamp, and forms thread transmission with the threaded engagement of jaw.Overcoat is set on the nut (also being arranged with nut sleeve in some cases on the nut).Put outward and have key, have on the nut and the corresponding keyway of key, so that overcoat can be connected with nut sleeve (nut) by key.
In use, manual rotary sleeve, overcoat and then drive nut cover and/or nut, nut drives jaw and moves forward and backward in the inclined hole of clamp then, thereby three jaws is opened or closed, unclamps or clamping tool realizing.
Have the threaded portion that forms along the cutting of side on the jaw of this chuck, have screw thread clearing end plane at the front end of this threaded portion.Unclamp the direction rotation when the nut edge, when being driven into jaw near extreme position backward, the screw thread clearing end plane of jaw and the screw thread end face of nut are frictionally engaged, and recline mutually.Being further rotated of nut will make these two face excessive compression and produce very big frictional force.Therefore,, bring inconvenience, stuck phenomenon can occur sometimes even also to use when during with clamping tool, must at first overcoming this frictional force along clamping direction rotation nut.In addition, this frictional force also can increase the wearing and tearing of screw thread, influences the service life of chuck.
U.S. Patent No. 5913524 discloses a kind of chuck that has the clamp mechanism stop part, and as shown in figure 42, this chuck is to be provided with one with the rotatable stopper section 2 ' a of nut on nut 2 ', and this stopper section 2 ' a extends at the axis direction of clamp.When making jaw 3 ' arrive in the inclined hole certain precalculated position by nut 2 ' along the rotation of unclamping direction, stopper section 2 ' a connects jaw 3 ' along direction of rotation, prevents that nut 2 ' from further turning round along unclamping direction.
Chinese patent No.99101282.8 (notification number CN1097503C) discloses a kind of chuck that has jaw blade rotational stop.As shown in figure 43, this chuck comprises a rotary braking device that is placed between nut 2 ' and the jaw 3 ', when jaw 3 ' arrives in the inclined hole certain precalculated position, prevents that nut 2 ' from further turning round along unclamping direction.Described rotary braking device comprises surface a 2 ' a that radially stretches that limits the nut thread end, and described radial surface contacts the side surface 3 ' a of a jaw 3 in the described jaw 3.
The retaining structure that goes up of above-mentioned prior art all is arranged on the nut, will bring difficulty to the processing of nut.
The utility model content
The purpose of this utility model is to provide a kind of chuck that has reverse stopping device that is different from said structure.
For achieving the above object, the utility model proposes a kind of chuck with reverse stopping device, comprising: clamp, its rear end are connected to the driving shaft of power source, and have the inclined hole of the circumferential five equilibrium in a plurality of edges; A plurality of jaws be installed in respectively in a plurality of corresponding inclined hole in the described clamp, and its outer surface have screw thread; Nut is sleeved on the described clamp, and its inner surface has screw thread, and described nut and described jaw are threadedly engaged with by described; Overcoat is sleeved on the described clamp, and connects and drive described nut; And reverse stopping device, it is characterized in that, described reverse stopping device is sleeved on the described clamp, and rotate synchronously with described nut, have at least one elasticity lock pawl on it, described lock pawl in the form of sheets, when being rotated in a first direction described overcoat, when making described jaw retreat into the precalculated position, the side surface of the described jaw of described lock pawl backstop.
Preferably, described reverse stopping device is the stop cover, the rear end of described stop cover has the top, described lock pawl one end is a connecting portion, be connected with described top, the other end is a retainer, extends and turns forward along described first direction, and described lock pawl forms one by described connecting portion and described stop cover.
Wherein, described stop cover is fixedly set on the described nut.
Wherein, described reverse stopping device is the stop cover, described lock pawl formations that extends internally from described stop cover rear end, and comprising: connecting portion, be positioned at the middle part of described lock pawl, and overlap integrally formed with described stop or fixedly connected; Retainer is positioned at the first direction side of described relatively connecting portion on the described lock pawl, is used for the side surface of backstop jaw; And lever portion, being positioned on the lock pawl second direction side with the relative connecting portion of retainer, described second direction is opposite with described first direction.
Wherein, described lock pawl also comprises: the lateral surface support portion, be positioned at position corresponding on the lateral surface of described lock pawl with described retainer, and be used for when described retainer is stressed, being resisted against the inner surface of described stop cover, to support described retainer.
Wherein, described chuck also comprises the back cover, fixedlys connected with the rear end of described clamp in its rear end, and described lock pawl also comprises: jut, be positioned at medium position corresponding with described connecting portion on the described lock pawl, it contacts to upper process and with the rearward end inner face of described back cover.
Wherein, have key on one in described stop cover or the described overcoat, have groove on another, described key cooperates with described groove, described stop cover is connected to describedly put outward.
Preferably, described reverse stopping device is the stop cover, and described lock pawl is distributed on the sidewall of described stop cover, and comprises: retainer, be positioned at the bottom of described lock pawl, and radially extend internally, be used for coming the side surface of the described jaw of backstop by its side surface; Connecting portion is used for described lock pawl is connected to the body that described stop is overlapped; Lever portion is positioned at the top of described lock pawl, radially extend internally, in order to the back end in contact of described jaw, thereby under a top of described jaw rear end, make described lock pawl swing.
Wherein, described connecting portion is the elasticity pivoted arm, is positioned at the top of described lock pawl, is used to be connected to the body of described stop cover, described lock pawl can be rotated around it, and can produce the elastic restoring force that described lock pawl is resetted.
Wherein, the retainer of described lock pawl is the arc-shaped bend structure of extending projection to the inside, and side, its underpart can lean against on the adjacent stop cover sidewall.
Wherein, the body of the described relatively lock pawl of described lever portion is setovered along described first direction, and the one end is connected with the body of described lock pawl, and the other end is a free end, in order to the back end in contact of described jaw.
Wherein, the part that described lock pawl is independent, its connecting portion has the pivot hole, is pivotally connected on the body of described stop cover.
Wherein, described pivot is made of the quoit around described stop cover.
Wherein, the body of the described relatively lock pawl of described lever portion is setovered along described first direction, and the one end is connected with the body of described lock pawl, and the other end is a free end, and its middle part forms downward projection, in order to the back end in contact of described jaw.
Wherein, the rear end of described stop cover radially extends internally in the position relative with the free end of the lever portion of described lock pawl and forms the stopper section, in order to the described free end of backstop.
Preferably, described reverse stopping device is the stop cover, and described stop cover comprises nut sleeve and arresting disc for fabricated structure, and described lock pawl is arranged on the described arresting disc.
Wherein, described nut sleeve is fixedly set on the described nut, and its rear end forms a plurality of protruding keys.Correspondingly, form the groove that matches with protruding key on the described arresting disc, described nut sleeve and described arresting disc by described protruding key and groove links together and, described chuck also comprises bonnet, have the groove that matches with described protruding key on the described bonnet, described arresting disc is fixed on the described nut sleeve by described bonnet.
Wherein, described overcoat, nut, nut sleeve, arresting disc and bonnet can rotate synchronously relative to described clamp.
Preferably, described reverse stopping device is the stop cover, and described stop is set on described nut lower end, and described lock pawl props up on the side surface that is positioned at bottom, screw thread clearing end plane that withstands on described jaw.
Wherein, described stop puts has the protruding key that extends radially outward, and the lower end of described nut has corresponding groove, by described protruding key and groove described stop cover is coupled together with described nut.
Wherein, described stop cover can be the opening shape.
The utility model is by having the flexible lock pawl that is connected synchronously with overcoat, make chuck when stop, can provide reliable stopping effect, and lock pawl can pass through the elastic restoring force homing when rotating from stop position along clamping direction, thereby finish reverse stopping function reliably, prevented that the screw thread clearing end plane of jaw and the screw thread end face of nut are frictionally engaged, avoided effectively because frictional force and the stuck phenomenon that the excessive compression of these two faces causes.
Description of drawings
In conjunction with the accompanying drawings, above-mentioned purpose, characteristics with other of the present utility model become clearer by the description of following preferred embodiment, wherein:
Fig. 1 is the exploded view that has according to the chuck with reverse stopping device of the utility model first embodiment.
Fig. 2 is the stereogram of chuck under general state of first embodiment, and wherein for for purpose of brevity, part-structure is not shown.
Fig. 3 is the stereogram of chuck under arrested state of first embodiment, and wherein for for purpose of brevity, part-structure is not shown.
Fig. 4 is the upward view according to the stop cover of the chuck of the utility model second embodiment.
Fig. 5 is that the stop cover among second embodiment is looked cutaway view along the master of the A-A position among Fig. 4.
Fig. 6, Fig. 7, Fig. 8 are the stop schematic diagrams of second embodiment; Wherein:
Fig. 6 is that the relative nut of jaw turns to the relative position figure of arrested state precontract 120 when spending;
Fig. 7 is the relative position figure of the relative nut of jaw when turning to jaw lateral dimension of arrested state precontract;
Fig. 8 is the relative position figure of the relative nut of jaw when turning to arrested state.
Fig. 9 is the front view according to the chuck of the utility model the 3rd embodiment.
Figure 10 is that the chuck of the 3rd embodiment is looked cutaway view along the master of the B-B position among Fig. 9.
Figure 11 is the upward view of the stop cover among the 3rd embodiment.
Figure 12 is that stop cover among the 3rd embodiment is along the cutaway view of C-C position among Figure 11.
Figure 13 is that the master according to the chuck of the utility model the 4th embodiment looks cutaway view, and wherein this chuck is in the position near arrested state.
Figure 14 is the front view of the chuck of the 4th embodiment in the arrested state position.
Figure 15 is the cutaway view of the chuck of the 4th embodiment along the D-D position among Figure 13.
Figure 16 is the cutaway view of the stop cover among the 4th embodiment.
Figure 17 is the vertical view of stop cover among the 4th embodiment.
Figure 18 is the stereogram of stop cover among the 4th embodiment.
Figure 19, Figure 20, Figure 21 are the stop schematic diagrams of the 4th embodiment; Wherein:
Figure 19 is the relative position schematic diagram of jaw and stop cover under general state;
Figure 20 is the relative position schematic diagram of jaw and stop cover under arrested state;
Figure 21 is the partial cutaway schematic along F-F position among Figure 20, shows the relative position radially of jaw 3 and stop cover 48 under arrested state
Figure 22 is according to the chuck of the utility model the 5th embodiment front view in the arrested state position.
Figure 23 is the vertical view cutaway drawing of the chuck of the 5th embodiment along the G-G position of Figure 22.
Figure 24 is that the master of the stop cover among the 5th embodiment looks cutaway view.
Figure 25 is the vertical view of the stop cover among the 5th embodiment.
Figure 27, Figure 28, Figure 29 are the stop schematic diagrams of the 5th embodiment; Wherein:
Figure 27 is the relative position schematic diagram of jaw and stop cover under a certain general state;
Figure 28 is the relative position schematic diagram of jaw and stop cover under arrested state;
Figure 29 is the partial cutaway schematic along J-J position among Figure 28, shows the relative position of jaw and stop cover under arrested state.
Figure 30 is the three-dimensional exploded view according to the chuck of the utility model the 6th embodiment.
Figure 31 is the stereogram of the chuck of the 6th embodiment at general state, and wherein for for purpose of brevity, part-structure is not shown.
Figure 32 is the stereogram of the chuck of the 6th embodiment in arrested state, and wherein for for purpose of brevity, part-structure is not shown.
Figure 33 is the three-dimensional exploded view according to the chuck of the utility model the 7th and the 8th embodiment.
Figure 34 is the upward view of the stop cover among the 7th embodiment.
Figure 35 is the cutaway view of the stop cover among the 7th embodiment.
Figure 36, Figure 37, Figure 38 are the stop schematic diagrams of the 7th embodiment; Wherein:
Figure 36 is that the relative nut of jaw turns to the relative position figure of arrested state precontract 120 when spending;
Figure 37 is the relative position figure of the relative nut of jaw when turning to jaw lateral dimension of arrested state precontract;
Figure 38 is the relative position figure of the relative nut of jaw when turning to arrested state.
Figure 39 is the stereogram according to the stop cover of the chuck of the 8th embodiment of the present utility model.
Figure 40 is the three-dimensional exploded view according to the chuck of the utility model the 9th embodiment.
Figure 41 is the stereogram of the stop cover of the 9th embodiment.
Figure 42 and Figure 43 are two chocking construction schematic diagrames that have the chuck of reverse stopping device of the prior art.
The specific embodiment
Chuck of the present utility model can be used to clamping produces main effect to rotatablely move the handle kind tool that has, and as drill bit, screw tap, reamer or the like, for ease of narration, is referred to as pad in this specification.Below in conjunction with accompanying drawing the utility model is further described.
In description, with respect to chuck itself, be " preceding " with pad place direction, the direction at drive power source axle place is " back ".In conjunction with the accompanying drawings the time, " preceding " is also referred to as D score usually, and " back " is also referred to as " back " usually.Other has and specifies or obviously can not illustrate except the situation about understanding according to this.
Fig. 1 is the exploded view that has according to the chuck with reverse stopping device of the utility model first embodiment.As shown in Figure 1, this chuck comprises: clamp 1, nut 2, a plurality of (for example three) jaw 3, bearing 4, overcoat 5, back cover (or bonnet) 6, location jump ring 7 and stop cover 18, clamp 1 rear end has the axial hole that is coupling and closes with drive power source, the outer peripheral edges tight fit of the rear end of back cover 6 and clamp 1.Three jaws 4 are installed in respectively in the corresponding inclined hole of three all five equilibriums towards each other in edge in the clamp 1, and its front end has clamping part, and outer surface has screw thread, and the screw thread edge is forwards to ending at screw thread clearing end plane 32.The inner surface of nut 2 has screw thread, thereby the jaw 3 in the inclined hole of nut 2 and clamp 1 passes through screw-threaded engagement.The outer peripheral edges of nut 2 are connected on the stop cover 18, have key 51 on the overcoat 5, have corresponding groove 21 on the nut 2, are connected with groove 21 by key 51 between overcoat 5 and the nut 3.During rotating jacket 5, drive jaws 3 by nut 2 and move forward and backward at three inclined holes of clamp 1 and realize clamping and the back off tool handle.
In this first embodiment, stop cover 18 is fixedly set on the nut 2, has replaced the nut sleeve in the conventional clip structure.Simultaneously, this stop is overlapped 18 rear ends and is had the top, has a plurality of lock pawls 181 on described top, and it is along the first direction (unclamp direction extend) and the inclination perk of (overlapping 18 inside to stop) forward.One end of lock pawl 181 is a connecting portion, is connected with the rearward end of stop cover 18, and its other end is a free end, forms retainer 182.Lock pawl 181 has elasticity, and it can be to overlap 18 integrally formedly by technologies such as stamping-out and stop, also can be to be fixed together with other known connected mode and stop cover.Preferably, this lock pawl 181 structure in the form of sheets.The cover of stop shown in the figure 181 has three lock pawls 181, but the number of lock pawl also can be one or other suitable number, and for example its number is consistent with the number of jaw 3.
Fig. 2 and Fig. 3 show the perspective view of chuck under general state (non-arrested state) and arrested state respectively, wherein for for purpose of brevity, and not shown overcoat 5, back cover 6 and location jump ring 7.
In conjunction with referring to Fig. 2 and Fig. 3, when along first direction (unclamping direction) rotating jacket 5, nut 2 rotates thereupon, and jaw 3 moves to backward near the rear end extreme position under the nut 2 that rotates (and stop cover 18) drives.At this moment, the screw thread clearing end plane 32 of corresponding jaw 3 is in the approaching position of annular cut-off plane in the screw thread with nut 2 23.At this moment, the stopper section 182 of lock pawl 181 contacts along circumferential side surface 31 with respect to clamp with the jaw rear end, prevent relatively rotating between nut 2 (and stop cover 18) and the jaw 3, thereby avoided the screw thread clearing end plane 32 of jaw 3 to contact extruding and produce excessive frictional resistance moment with the interior annular cut-off plane 23 of the screw thread of nut 2.
In this stop process, following situation may appear.When the side, rear end 31 of jaw 3 was too small with retainer 182 contacts area of the lock pawl of stop cover, lock pawl 181 can produce small backward yieldings (elasticity modification), can not stop motion effectively and slipped over this first lock pawl contact position.At this moment, jaw 3 can be rotated further to next adjacent lock pawl contact position (the second lock pawl contact position) by relative nut 2.At this moment, at this second lock pawl contact position, because the rear end of jaw 3 is with respect to having moved 1/3rd pitch again backward at the first phase lock pawl contact position place, and lock pawl is along clamp axis direction invariant position, therefore the coincidence of jaw side 31 and lock pawl retainer 182 height will can stop being rotated further of jaw reliably greater than 1/3rd pitch like this.
Fig. 4 shows structure and the stop principle schematic of second embodiment to Fig. 8.Different with first embodiment is to have adopted the stop cover 38 of another structure to replace the stop among first embodiment to overlap 18.The rear end of this stop cover 38 radially is provided with a plurality of lock pawls 381 consistent with jaw 3 numbers, and each lock pawl 381 has: be positioned at the connecting portion 389 at middle part, it overlaps 38 integrally formed or fixedly connected with stop; Be positioned at the retainer 382 of a free end (along the first direction side of relative connecting portion), be used for the side surface of backstop jaw 3; Be positioned at the lateral surface support portion 388 of the lateral surface (being preferably located in the lateral surface of retainer 382) of lock pawl 38, be used for when retainer 382 is stressed, resting on the inner surface of stop cover, to support retainer 382; Jut 385 is positioned on the lock pawl 381 position corresponding with connecting portion 389, and it contacts to upper process and with the rearward end inner face of back cover 6; Lever portion 386, another free end relative with retainer 382 that is positioned at lock pawl 381 (along the second direction side opposite with the first direction side of connecting portion relatively) is used for the back end in contact with another jaw 3, thereby moves up under a top of this jaw.
The stop principle of this chuck is described to Fig. 8 below in conjunction with Fig. 6.The direction that jaw 3 rotates relative to nut 2 among the figure is U, and moving direction is V.Shown in Figure 6 is the state that jaw moves to the end that will contact retainer 382 and lever portion 386 backward, at this moment, the end of three jaws 3 less than 1/3rd pitch, there is shown the 3rd (3#) and first (1#) jaw 3 apart from the gap of the end of retainer 382 and lever end 386; Shown in Figure 7 is that first (1#) jaw 3 is spent (differing an about jaw width) positions near turning over 120, and this moment, the end of jaw 3 moved to the distance h in end of crossing retainer 382 and lever portion 386 backward; Jaw shown in Figure 8 continues motion and its rear end contacts with the end of the lever portion 386 of lock pawl 38, there is shown first (1#) and second (2#) jaw 3.Under a top of the end of first (1#) jaw 3, the end of lever portion 386 is displacement h backward, retainer 382 has then moved forward distance W ≈ (L/1) * h under the leverage that with jut 385 is fulcrum, at this moment the retainer 382 of lock pawl 381 is of a size of H=h+W with jaw side 31 intersection, increased size W under the situation than the effect that does not have lever portion 386, so just can more effectively stop jaw 3 and continue to rotate relative to nut 2 (and stop cover 38).The effect of the lock pawl lateral surface support portion 388 on the stop cover 38 is to contact with retainer 382 and can it be applied more energetically and produce a little when the approaching displacement of 38 madial wall is overlapped in stop at jaw 3, and a supplemental support is provided.
Preferably, as shown in Figure 4 and Figure 5, the stop contact-making surface of retainer 382 has the shape consistent with the side surface of jaw 3.Under general state, the extreme lower position of the extreme lower position of retainer 382 and lever portion 386 is in same horizontal level, and all is lower than the medium position of described lock pawl.The end of lever portion 386 is bending upwards, thereby forms the inclined plane, so that during along clamping direction rotating jacket 5, the end of jaw 3 slips over lever portion 386 easily.Jut 385 is arc-shaped protrusions upwards.
Fig. 9 shows chuck according to the utility model the 3rd embodiment to Figure 12, and the difference of itself and second embodiment is that it has a stop cover (or locating snap ring) 78, and this stop cover and overcoat are fixed together by assembling.
As Fig. 9 and shown in Figure 10, the inner surface of overcoat 5 has groove 51.As Figure 11 and shown in Figure 12, stop is overlapped 38 correspondingly among stop cover 78 and second embodiment, distinguishes a plurality of lock pawls 781 on it, and each lock pawl 781 has connecting portion 789, retainer 782, lateral surface support portion 788, jut 785 and lever portion 786.Difference is, also is provided with a plurality of keys that extend radially outward 787 on the stop cover 78, is used for being connected with the groove 51 of overcoat 5.The projection formation that this key 787 shown in the figure is positioned at the lower end of stop cover 78 and extends downwards.
Figure 13 shows structure and stop principle schematic according to the chuck of the utility model the 4th embodiment to Figure 21.Different with first embodiment is to have adopted the stop cover 48 of another structure to replace the stop among first embodiment to overlap 18.
In this stop cover 48, a plurality of lock pawls 481 are arranged on the sidewall of stop cover 48, each lock pawl has: retainer 482, be positioned at the bottom of lock pawl 481, be the arc-shaped bend structure of extending projection to the inside, utilize its side surface to come the side surface of backstop jaw 3, the lower side of retainer can lean against on the adjacent stop cover sidewall, so that enough support strengths to be provided, guarantee stopping function to the side surface of jaw 3; Elasticity pivoted arm 485 is positioned at the top of lock pawl 481, is used to be connected to stop and overlaps 48 bodies, this lock pawl 481 can be rotated around it, and can produce the elastic restoring force that lock pawl 481 is resetted; Lever portion 486, be positioned at the top of lock pawl 481, its relative lock pawl body is setovered along first direction (unclamping direction), one end is connected with the body of lock pawl 481, the other end is a free end, in order to the back end in contact of jaw 3, thereby under a top of this jaw, move up, make described lock pawl swing.
In addition, as shown in figure 18, the lower end of stop cover 48 has the flange that extends radially outward, and is formed with a plurality of grooves 487 on it.Correspondingly, be formed with corresponding key 53 on the inner surface of overcoat 5, groove 487 cooperates with key 53, thereby overcoat 5 rotates, and can drive stop cover 48 and rotate.Certainly, stop cover 48 also can adopt other suitable structure to be connected with overcoat 5.
The operation principle of the chuck of the 4th embodiment is described to Figure 21 below in conjunction with Figure 19.Figure 19 is the relative position schematic diagram of jaw and stop cover under general state, and this moment, jaw 3 moved to the state of the lever portion 486 that will contact lock pawl 481 backward.Figure 20 is the relative position schematic diagram of jaw and stop cover under arrested state, this moment jaw 3 the rear end with lever portion 486 jack-up upwards, make lock pawl 481 around 485 rotations of elasticity pivoted arm, drive is positioned at the retainer 482 radially inwardly swing thereupon of lock pawl 481 bottoms, thereby utilize its side backstop on the side surface of jaw 3, thereby prevent the further rotation of stop cover 481, reach the stop purpose.Figure 21 is the partial cutaway schematic along F-F position among Figure 20, shows the relative position radially of jaw 3 and stop cover 48 under arrested state.During backward rotation overcoat 5, the rearward end of jaw 3 contacts with lever portion 486 disengagements of lock pawl 48, thereby by means of the elastic restoring force of elasticity pivoted arm retainer 482 is resetted.
Figure 22 shows structural representation according to the chuck of the utility model the 5th embodiment to Figure 29.The difference of itself and the 4th embodiment is that it has a stop cover (or locating snap ring) 60, have a plurality of independent lock pawls 88 on this stop cover 60, each lock pawl 88 has superposed connecting portion 885, be positioned at the retainer 882 of bottom and be positioned at the lever portion 886 of top one side.Connecting portion 885 is by being bent to form a pivot hole, and this pivot hole cooperates with pivot 59, thereby lock pawl 88 is connected on the stop cover 60.The middle part of lever portion 886 has downward projection 886a, is used to be subjected to the propping up of rearward end of jaw 3 to push up, and produces strain, makes radially inwardly swing of retainer 882.
Figure 27 shows the course of action of the chuck of the 5th embodiment to Figure 28, and itself and the 4th embodiment are basic identical.Wherein, Figure 27 is the relative position schematic diagram of jaw and stop cover under general state, this moment, jaw 3 moved to the state of the projection 886a of the lever portion 886 that will contact lock pawl 88 backward, and the free end 886b of lever portion 886 contacts with the lower surface of the stopper section 608 of stop cover 60.Figure 28 is the relative position schematic diagram of jaw and stop cover under arrested state, this moment, the rear end face of jaw 3 propped up the projection 886b of top lever portion 886, make lever portion 886 that strains take place and move up, 886 ' indication fine dotted line is a lever portion 886 at the state of its projection 886a during as yet not by jaw rear end face jack-up among the figure.Figure 29 is the partial cutaway schematic along J-J position among Figure 28, show the relative position radially of jaw 3 and stop cover 60 under arrested state, can see the retainer inside swing radially of lock pawl 88, make the side surface of its side surface backstop jaw 3, thereby realize the purpose of stop.Contact the elastic restoring force that produces by means of lever portion 886 with the stopper section 608 of stop cover 60, lock pawl 88 is resetted.
Figure 30 shows structural representation according to the chuck of the utility model the 6th embodiment to Figure 32.Different with previous embodiment is that the stop cover comprises nut sleeve 9 and arresting disc 28 for fabricated structure.Nut sleeve 9 is sleeved on the nut 2, and its rear end forms a plurality of axial protruding keys 91.Correspondingly, form the groove 283 that matches with protruding key 91 on the outer peripheral edges of arresting disc 28, thereby arresting disc 28 and nut sleeve 9 are linked together.This chuck also comprises bonnet 10, has the groove 101 that matches with protruding key 91 on it, by this bonnet 10 arresting disc 28 is fixed on the nut sleeve 9.Also have flange 102 on the bonnet 10, be used for being connected, to locate described nut sleeve and arresting disc vertically with the corresponding construction of overcoat 5 flange of inner surface (for example along).The middle part of bonnet 10 has the hole, and this hole cooperates rotatably with the rear end outer peripheral edges of clamp 1.In this embodiment, overcoat 5, nut 2, nut sleeve 9, arresting disc 28 and bonnet 10 rotate synchronously relative to clamp 1.
Figure 33 shows the structural representation of the chuck of the utility model the 7th embodiment to Figure 38, different with previous embodiment is, among this embodiment stop cover 98 is installed between the screw thread clearing end plane 32 of the interior annular cut-off plane 223 of nut 22 and jaw 3, and nut 22 and stop is overlapped 98 axial location by a fixed cover 12.The lower end of nut 22 has groove 227, extends radially outward on the stop cover 98 to form the protruding key 587 corresponding with groove 227, and groove 227 cooperates with protruding key 587, with stop overlap 98 and nut 22 link together.Referring to Figure 34 and Figure 35, it is 78 similar that this stop cover 98 and the stop among the 3rd embodiment are overlapped, have a plurality of lock pawls 981 on its upper surface, each lock pawl 981 has connecting portion 989, retainer 982, lateral surface support portion 988, jut 985 and lever portion 986.
Figure 36 shows the stop principle of the chuck of the 7th embodiment to Figure 38, itself and Fig. 6 are basic identical to the principle of second embodiment shown in Figure 8.The direction that jaw 3 rotates relative to nut 22 among the figure is U, and moving direction is V.Shown in Figure 36 is the state that jaw moves to the end that will contact retainer 982 and lever portion 986 backward, at this moment, the screw thread clearing end plane 32 of three jaws 3 less than 1/3rd pitch, there is shown the 3rd (3#) and first (1#) jaw 3 apart from the tip-clearance of retainer 982 and lever portion 986; Shown in Figure 37 is that first (1#) jaw 3 is spent (differing an about jaw width) positions near turning over 120, and this moment, the screw thread clearing end plane 32 of jaw 3 moved to the distance h in end of crossing retainer 982 and lever portion 986 backward; Jaw 3 shown in Figure 38 continues motion and its rear end contacts with the end of the lever portion 986 of lock pawl 98, there is shown first (1#) and second (2#) jaw 3.Under a top of the rearward end of first (1#) jaw 3, the rear end of lever portion 986 is displacement h backward, retainer 982 has then moved forward distance W ≈ (L/1) * h under the leverage that with jut 985 is fulcrum, at this moment the retainer 982 of lock pawl 98 is of a size of H=h+W with jaw side 31 intersection, than having increased size W under the situation that does not have lever portion 986 effects, so just can more effectively stop jaw 3 and continue to rotate relative to nut 22 (and stop cover 98).
Figure 39 shows the stop cover according to the chuck of the utility model the 8th embodiment.The basic structure of the chuck of the 8th embodiment is identical with the 7th embodiment.Difference is to adopt the stop cover 98 among stop cover 58 replacements the 7th embodiment.This stop cover 58 has extended radially outward protruding key 587, and its upper surface is formed with lock pawl 581, and this lock pawl is similar to the lock pawl among first embodiment, one end is a link, be connected with the madial wall of stop cover 58, the other end is a free end, forms retainer 582.
Figure 40 shows chuck according to the utility model the 9th embodiment to Figure 41, and it is similar to the 8th embodiment, and difference is that stop cover 68 forms the opening shapes.This stop puts has the protruding key 687 that extends radially outward equally, and is formed with lock pawl 681, has retainer 682 on this lock pawl 681.This structure is applicable to that nut 2 is split type structure, the situation that can be opened for two halves, so that assembling.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (21)
1. chuck with reverse stopping device comprises:
Clamp, its rear end are connected to the driving shaft of power source, and have the inclined hole of the circumferential five equilibrium in a plurality of edges;
A plurality of jaws are installed in respectively in a plurality of corresponding inclined hole in the described clamp,
And its outer surface has screw thread;
Nut is sleeved on the described clamp, and its inner surface has screw thread, and described nut and described jaw are threadedly engaged with by described;
Overcoat is sleeved on the described clamp, and connects and drive described nut; And
Reverse stopping device is characterized in that, described reverse stopping device is sleeved on
On the described clamp, and rotate synchronously, have at least one elasticity lock pawl on it with described nut, described lock pawl in the form of sheets, when being rotated in a first direction described overcoat, when making described jaw retreat into the precalculated position, the side surface of the described jaw of described lock pawl backstop.
2. chuck according to claim 1, wherein, described reverse stopping device is the stop cover, the rear end of described stop cover has the top, and described lock pawl one end is a connecting portion, is connected with described top, the other end is a retainer, extend and turn forward along described first direction, and described lock pawl overlaps the formation one by described connecting portion and described stop.
3. chuck according to claim 1, wherein, described stop cover is fixedly set on the described nut.
4. chuck according to claim 1, wherein, described reverse stopping device is the stop cover, the formation that extends internally from described stop cover rear end of described lock pawl, and comprise: connecting portion, be positioned at the middle part of described lock pawl, integrally formed with described stop cover or fixedly connected;
Retainer is positioned at the first direction side of described relatively connecting portion on the described lock pawl, is used for the side surface of backstop jaw; And
Lever portion is positioned on the lock pawl second direction side with the relative connecting portion of retainer, and described second direction is opposite with described first direction.
5. chuck according to claim 4, wherein, described lock pawl also comprises:
The lateral surface support portion is positioned at position corresponding with described retainer on the lateral surface of described lock pawl, is used for being resisted against the inner surface of described stop cover when described retainer is stressed, to support described retainer.
6. chuck according to claim 5, wherein, described chuck also comprises the back cover, and fixedly connected with the rear end of described clamp in its rear end, and described lock pawl also comprises:
Jut is positioned at medium position corresponding with described connecting portion on the described lock pawl, and it contacts to upper process and with the rearward end inner face of described back cover.
7. according to described chuck one of in the claim 4 to 6, wherein, have key on one in described stop cover or the described overcoat, have groove on another, described key cooperates with described groove, described stop cover is connected to describedly put outward.
8. chuck according to claim 1, wherein, described reverse stopping device is the stop cover, described lock pawl is distributed on the sidewall of described stop cover, and comprises:
Retainer is positioned at the bottom of described lock pawl, radially extends internally, and is used for coming by its side surface the side surface of the described jaw of backstop;
Connecting portion is used for described lock pawl is connected to the body that described stop is overlapped;
Lever portion is positioned at the top of described lock pawl, radially extend internally, in order to the back end in contact of described jaw, thereby under a top of described jaw rear end, make described lock pawl swing.
9. chuck according to claim 8, wherein, described connecting portion is the elasticity pivoted arm, is positioned at the top of described lock pawl, is used to be connected to the body of described stop cover, makes
Described lock pawl can rotate around it, and can produce the elastic restoring force that described lock pawl is resetted.
10. chuck according to claim 8, wherein, the retainer of described lock pawl is the arc-shaped bend structure of extending projection to the inside, and side, its underpart can lean against on the adjacent stop cover sidewall.
11. chuck according to claim 8, wherein, the body of the described relatively lock pawl of described lever portion is setovered along described first direction, and the one end is connected with the body of described lock pawl, and the other end is a free end, in order to the back end in contact of described jaw.
12. chuck according to claim 8, wherein, the part that described lock pawl is independent, its connecting portion has the pivot hole, cooperates with pivot on the body that is connected to described stop cover by described pivot hole.
13. chuck according to claim 12, wherein, described pivot is made of the quoit around described stop cover.
14. chuck according to claim 13, wherein, the body of the described relatively lock pawl of described lever portion is setovered along described first direction, the one end is connected with the body of described lock pawl, the other end is a free end, and its middle part forms downward projection, in order to the back end in contact of described jaw.
15. chuck according to claim 14, wherein, the rear end of described stop cover radially extends internally in the position relative with the free end of the lever portion of described lock pawl and forms the stopper section, in order to the described free end of backstop.
16. chuck according to claim 1, wherein, described reverse stopping device is the stop cover, and described stop cover comprises nut sleeve and arresting disc for fabricated structure, and described lock pawl is arranged on the described arresting disc.
17. chuck according to claim 16, wherein, described nut sleeve is fixedly set on the described nut, and its rear end forms a plurality of protruding keys.Correspondingly, form the groove that matches with protruding key on the described arresting disc, described nut sleeve and described arresting disc by described protruding key and groove links together and, described chuck also comprises bonnet, have the groove that matches with described protruding key on the described bonnet, described arresting disc is fixed on the described nut sleeve by described bonnet.
18. chuck according to claim 17, wherein, described overcoat, nut, nut sleeve, arresting disc and bonnet can rotate synchronously relative to described clamp.
19. chuck according to claim 1, wherein, described reverse stopping device is the stop cover, and described stop is set on described nut lower end, and described lock pawl props up on the side surface that is positioned at bottom, screw thread clearing end plane that withstands on described jaw.
20. chuck according to claim 19, wherein, described stop puts has the protruding key that extends radially outward, and the lower end of described nut has corresponding groove, by described protruding key and groove described stop cover is coupled together with described nut.
21. according to claim 19 or 20 described chucks, wherein, described stop cover is the opening shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201277179U CN2863323Y (en) | 2005-10-12 | 2005-10-12 | Clamping head with reversal arresting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201277179U CN2863323Y (en) | 2005-10-12 | 2005-10-12 | Clamping head with reversal arresting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2863323Y true CN2863323Y (en) | 2007-01-31 |
Family
ID=37675776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201277179U Expired - Fee Related CN2863323Y (en) | 2005-10-12 | 2005-10-12 | Clamping head with reversal arresting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2863323Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443225C (en) * | 2005-10-12 | 2008-12-17 | 山东威达机械股份有限公司 | Clamping chuck with reverse stopping device |
-
2005
- 2005-10-12 CN CNU2005201277179U patent/CN2863323Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443225C (en) * | 2005-10-12 | 2008-12-17 | 山东威达机械股份有限公司 | Clamping chuck with reverse stopping device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070131 Termination date: 20121012 |