CN206936415U - A kind of drill chuck of electric drill - Google Patents

Abstract

The utility model provides a kind of drill chuck of electric drill, belongs to power tools technology field.The technical problem such as excessive is easily operated when it solves existing drill chuck locking tool head.This drill chuck includes drill point set and the drill body of column, drill point set is set on drill body and can rotated around drill body, it is circumferentially distributed on drill body to have some inclined and threaded clamping jaw of tool, clamping jaw can be slided and rotated along own axes, inner ring is installed with drill point set, there is the shell fragment to bend inwards on inner ring, gear ring is arranged with drill body, there is teeth groove, shell fragment is resisted against on teeth groove on the outer peripheral face of gear ring；It is additionally provided with drill point set and covers circumferentially fixed nut with drill point, nut is set in outside drill body and is threadedly coupled with each clamping jaw, has step surface on the outer peripheral face of drill body, nut can move towards step surface direction；Step surface is located at the both sides of gear ring with nut respectively.Drill chuck in the utility model can send prompt tone, be not in the phenomenon of excessive operation.

Description

A kind of drill chuck of electric drill

Technical field

The utility model belongs to power tools technology field, is related to a kind of electric drill, particularly a kind of drill chuck of electric drill.

Background technology

The drill chuck of electric drill is used to clamp drilling tool, is generally made up of drill body, clamping jaw, drill point set and bonnet etc..Three clamping jaws It is respectively installed in three slideways of drill body, the internal thread phase for making the external screw thread on clamping jaw be put with drill point by rotating drill point set Coordinate and realize the oblique movement of clamping jaw, accurately self-centering and clamp drilling tool, a usual drill chuck can be equipped with different Drilling tool, such as centre drill, drill bit, reamer, screw tap, it is necessary to which can be manually rotated drill point set drives clamping jaw movement when changing installation drilling tool To clamp or unclamp drilling tool.

China's patent (notification number：CN203956168U；The day for announcing：2014-11-26) disclose a kind of anti-loosening drill point Head, including overcoat and drill body, overcoat are socketed on drill body and can rotated relative to drill body, put outside provided with nut, nut sleeve It is located on drill body and can be circumferentially rotated along drill body, it is circumferentially distributed in drill body to have several inclined holes, the axis and drill body of inclined hole Axis it is at an acute angle, the clamping jaw that can be slided along inclined hole axis is equipped with inclined hole, clamping jaw be provided with external screw thread and external screw thread and spiral shell Parent phase engages, and the lateral wall of drill body is provided with ratchet, nut sleeve is additionally provided between overcoat and drill body, and a nut sleeve part is set in On nut, nut sleeve another part is provided with shell fragment, and shell fragment is between nut sleeve and ratchet and can push against ratchet.

Clamping jaw is driven to move by the nut sleeve in overcoat in above-mentioned patent document, clamping jaw is when clamping drilling tool, rotation manually Turn overcoat until when can not rotate, can just know that clamping jaw has been clamped drilling tool, it is of different sizes yet with everyone strength, The clamping dynamics of clamping jaw can not be conveniently controlled during operation, easily operation is excessive, wastes time and energy, and easily cause the damage of drill chuck It is bad.

The content of the invention

The utility model is to be directed to above mentioned problem existing for existing technology, there is provided a kind of drill chuck of electric drill.This reality It is with new technical problem to be solved：How the dynamics of control drill chuck locking drilling tool is facilitated.

The purpose of this utility model can be realized by following technical proposal：

A kind of drill chuck of electric drill, including drill point set and column drill body, the drill point set be set on the drill body and It can be rotated around drill body, circumferentially distributed on the drill body to have some inclined and threaded clamping jaw of tool, the clamping jaw can Slide and rotate along own axes, it is characterised in that inner ring is installed with the drill point set, has on the inner ring and bends inwards Shell fragment, be arranged with gear ring on the drill body, there is teeth groove on the outer peripheral face of the gear ring, the shell fragment is resisted against the teeth groove On；Be additionally provided with drill point set and cover circumferentially fixed nut with drill point, the nut be set in the drill body it is outer and with it is each The clamping jaw is threadedly coupled, and has step surface on the outer peripheral face of the drill body, and the nut can be towards the step surface side To movement；The step surface is located at the both sides of the gear ring with the nut respectively.

Its principle is as follows：This drill chuck can be used in the drilling tool clamping of various occasions, and clamping jaw is used to clamp the brill such as drill bit Tool, the rotation for driving drill body by power source realize the normal work of drilling tool so as to drive drilling tool to rotate.Drill point set is socketed in It can rotate on drill body and relative to drill body, nut is arranged in drill point set and cooperatively forms screw-driven with the screw thread on clamping jaw. In use, hand twists drill point set, nut rotation is driven, by screw-driven, the clamping jaw of drill chuck is obliquely forwarded or is retreated, so as to The fixture for enabling clamping jaw to be combined into opens or closed, and reaches the purpose unclamped or clamp drilling tool.The outer peripheral face of gear ring and drill body Between be that gap coordinates, can produce relative rotation between the two；While rotary drilling chuck drives clamping jaw movement, drill point set Drive inner ring and ring gear against rotation；After clamping jaw clamps drilling tool, as clamping force increases, clamping jaw no longer moves, and nut is towards platform Terrace direction is mobile and forms extruding to gear ring, after the side of gear ring contacts with the step surface of drill body, with gear ring and step surface Between pressure increase, frictional force between the two also increases therewith, until gear ring is not rotated further by, and in now drill point set drives Circle can also be rotated further, and the shell fragment of inner ring just slips over one by one from the teeth groove of gear ring, can send between the two clear and melodious " rattling away " The sound of " rattling away ", so as to reach the effect that prompting drill chuck has clamped drilling tool；When unclamping drilling tool, nut releases and gear ring is squeezed Pressure, gear ring reduces just cover with drill point with the frictional force of drill body to be rotated.By said structure design, can according to the sound and When judge that clamping jaw is moved into position, from without excessive operation, the convenient dynamics for controlling drill chuck locking drilling tool；Save Time and manpower, can also avoid the damage of drill chuck.

In the drill chuck of above-mentioned electric drill, the shell fragment is opened close to the side of the inner ring, the opposite side of the inner ring Provided with locating slot, there is the convex key being engaged with the locating slot on the inwall of the drill point set, the convex key is embedded described In locating slot.By the cooperation of convex key and locating slot, the reliability that drill point set drives inner ring to rotate can be ensured, prevent from skidding, So as to ensure that prompt tone is timely and effectively sent between inner ring and gear ring.

In the drill chuck of above-mentioned electric drill, the quantity of the locating slot has several and along the circumferential uniform intervals of inner ring Distribution；The quantity of the convex key is identical with the quantity of the locating slot and both correspond and set.Between drill point set passes through uniformly Coordinate every the convex key of distribution and the locating slot of inner ring and pass torque to inner ring, ensure that the uniform reliable of torque transmission, so as to Drive the stable rotation of inner ring.

In the drill chuck of above-mentioned electric drill, the shell fragment quantity on the inner ring have several and along inner ring it is circumferential uniformly It is spaced apart；Each shell fragment leans with the teeth groove on the gear ring.Multiple shell fragments can be uniformly reliable in the starting stage Torque is transmitted to gear ring, drives gear ring synchronous axial system；After clamping jaw clamps drilling tool, the more than enough place of and can sends the sound, ensures prompting The effect of sound.

In the drill chuck of above-mentioned electric drill, the shell fragment is in bar shaped tabular, and one end of the shell fragment is connected on inner ring, The other end of the shell fragment has the butting section to bending in the middle part of inner ring；The inwall of the drill point set is provided with slot to make way, described Slot to make way is correspondingly arranged with the butting section.After clamping jaw clamps drilling tool, gear ring and inner ring relatively rotate, and shell fragment passes through teeth groove To its caused deformation accumulation elastic potential energy, then impact and voice prompt sent on gear ring, when shell fragment deforms, shell fragment against Portion can be moved into slot to make way, and interference is produced between shell fragment and drill point set so as to avoid.

In the drill chuck of above-mentioned electric drill, steel part set, the steel part set and institute are inlaid with the inwall of the drill point set The outer peripheral face for stating nut is fitted close.Drill point set is covered by steel part drives nut rotation, so as to drive clamping jaw to be moved to release Or clamp the purpose of drilling tool；Small axial movement can also be produced simultaneously, gear ring is formed and extruded so that gear ring and step surface Between pressure and frictional force increase, realize that inner ring and gear ring produce relative rotation, occurred the purpose of sound.

In the drill chuck of above-mentioned electric drill, plane bearing is provided between the nut and the gear ring.Pass through plane axis Nut can be reduced by holding relatively rotates caused wear with gear ring.

In the drill chuck of above-mentioned electric drill, there is abutment face on the inwall of the drill point set, the side of the inner ring is supported Lean against on the abutment face；Jump-ring slot is further opened with the inwall of the drill point set；Jump ring is provided with the jump-ring slot, it is described interior The opposite side of circle is resisted against on the jump ring.So internally circle forms axial limiting, ensure that the reliability of inner ring installation.

Compared with prior art, can be timely according to the sound by the design of above-mentioned inner ring and gear ring in the utility model Judge that clamping jaw is moved into position, from the phenomenon without excessive operation, the convenient dynamics for controlling drill chuck locking drilling tool； Time and manpower are saved simultaneously, can also avoid the damage of drill chuck.

Brief description of the drawings

Fig. 1 is the half section structure diagram of this drill chuck.

Fig. 2 is the cross section structure diagram at A-A in Fig. 1.

Fig. 3 is the configuration schematic diagram of this drill chuck.

Fig. 4 is the dimensional structure diagram of inner ring in this drill chuck.

Fig. 5 is the dimensional structure diagram of gear ring in this drill chuck.

Fig. 6 is the dimensional structure diagram that drill point covers in this drill chuck.

In figure, 1, drill point set；11st, convex key；12nd, slot to make way；13rd, abutment face；14th, jump-ring slot；2nd, drill body；21st, step surface； 3rd, clamping jaw；4th, inner ring；41st, shell fragment；41a, butting section；42nd, locating slot；5th, gear ring；51st, teeth groove；6th, nut；7th, steel part set；8、 Plane bearing；9th, jump ring.

Embodiment

It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.

As shown in Figures 1 to 6, this drill chuck includes drill point set 1 and the drill body 2 of column, and drill point set 1 is set on drill body 2 And can be rotated around drill body 2, it is circumferentially distributed on drill body 2 to have some inclined and threaded clamping jaw 3 of tool, opened on drill body 2 It is uniformly distributed provided with three towards the inclined slideway in the axis of drill body 2 and three slideways along drill body 2 is circumferential, the quantity of clamping jaw 3 For three, clamping jaw 3 corresponds with slideway to be set and is inserted with a clamping jaw 3 in each slideway, and clamping jaw 3 can be along itself axle Line is slided and rotated, and the end center of drill body 2 also has centre bore, and slideway is obliquely installed towards the centre bore, the folder in slideway Pawl 3 can be moved towards the centre bore and drawn close, and be clamped so as to be formed to drilling tool.Inner ring 4 is installed with drill point set 1, is had on inner ring 4 There is the shell fragment 41 to bend inwards, gear ring 5 is arranged with drill body 2, there is teeth groove 51 on the outer peripheral face of gear ring 5, shell fragment 41 is resisted against On teeth groove 51；Be additionally provided with drill point set 1 and cover 1 circumferentially fixed nut 6 with drill point, nut 6 be set in drill body 2 it is outer and with it is each Clamping jaw 3 is threadedly coupled, and has step surface 21 on the outer peripheral face of drill body 2, and nut 6 can move towards the direction of step surface 21；Platform Terrace 21 is located at the both sides of gear ring 5 with nut 6 respectively.In use, hand twists drill point set 1, drive nut 6 to rotate, passed by screw thread It is dynamic, the clamping jaw 3 of drill chuck is obliquely forwarded or is retreated, so that the fixture that clamping jaw 3 is combined into can open or close, reach pine Open or clamp the purpose of drilling tool.It is that gap coordinates between the outer peripheral face of gear ring 5 and drill body 2, can produces between the two relative Rotate；While rotary drilling chuck 1 drives the movement of clamping jaw 3, the drive inner ring 4 of drill point set 1 and gear ring 5 rotate；Bored when clamping jaw 3 clamps After tool, as clamping force increases, clamping jaw 3 no longer moves, and nut 6 is mobile towards the direction of step surface 21 and gear ring 5 is formed crowded Pressure, after the side of gear ring 5 contacts with the step surface 21 of drill body 2, as the pressure between gear ring 5 and step surface 21 increases, both Between frictional force also increase therewith, until gear ring 5 is not rotated further by, and now the drive inner ring 4 of drill point set 1 can also be rotated further, The shell fragment 41 of inner ring 4 just slips over one by one from the teeth groove 51 of gear ring 5, can send the sound of clear and melodious " rattling away " " rattling away " between the two, So as to reach the effect that prompting drill chuck has clamped drilling tool；When unclamping drilling tool, nut 6 releases the extruding to gear ring 5, gear ring 5 with The frictional force of drill body 2 reduces can just rotate with drill point set 1.By said structure design, can be judged in time according to the sound Clamping jaw 3 is moved into position, from without excessive operation, the convenient dynamics for controlling drill chuck locking drilling tool；When saving Between and manpower, can also avoid the damage of drill chuck.

As shown in Figure 1, Figure 2, shown in Fig. 4 and Fig. 6, shell fragment 41 offers positioning close to the side of inner ring 4, the opposite side of inner ring 4 Groove 42, drill point, which is covered on 1 inwall, has the convex key 11 being engaged with locating slot 42, and convex key 11 is embedded in locating slot 42, is positioned The quantity of groove 42 has several and is distributed along the circumferential uniform intervals of inner ring 4；The quantity of convex key 11 and the quantity phase of locating slot 42 Same and both one-to-one corresponding are set；By the cooperation of convex key 11 and locating slot 42, it can ensure that the drive inner ring 4 of drill point set 1 rotates Reliability, prevent from skidding, so as to ensure timely and effectively to send prompt tone between inner ring 4 and gear ring 5；Drill point set 1 is by equal The locating slot 42 of the even convex key 11 being spaced apart and inner ring 4, which coordinates, passes torque to inner ring 4, ensure that the uniform of torque transmission Reliably, so as to driving the stable rotation of inner ring 4；The quantity of shell fragment 41 on inner ring 4 have several and along inner ring 4 it is circumferential uniformly It is spaced apart；Each shell fragment 41 leans with the teeth groove 51 on gear ring 5, and multiple shell fragments 41 can be uniformly reliable in the starting stage To gear ring 5 transmit torque, drive the synchronous axial system of gear ring 5；After clamping jaw 3 clamps drilling tool, the more than enough place of and can sends the sound, ensures The effect of prompt tone.Further, shell fragment 41 is in bar shaped tabular, and one end of shell fragment 41 is connected on inner ring 4, shell fragment 41 it is another One end has the butting section 41a to the bending of the middle part of inner ring 4；The inwall of drill point set 1 is provided with slot to make way 12, and slot to make way 12 is with supporting Relying part 41a is correspondingly arranged, and after clamping jaw 3 clamps drilling tool, gear ring 5 and inner ring 4 relatively rotate, and shell fragment 41 is by teeth groove 51 to it Elastic potential energy is accumulated in caused deformation, then impacts and send voice prompt on gear ring 5, and when shell fragment 41 deforms, shell fragment 41 supports Relying part 41a can be moved into slot to make way 12, and interference is produced between shell fragment 41 and drill point set 1 so as to avoid.

As shown in figures 1 and 3, steel part set 7 is inlaid with the inwall of drill point set 1, steel part set 7 is tight with the outer peripheral face of nut 6 Close fit, drill point set 1 are rotated by the drive nut 6 of steel part set 7, so as to drive clamping jaw 3 to be moved to release or clamp drilling tool Purpose；Small axial movement can also be produced simultaneously, gear ring 5 is formed and extruded so that between gear ring 5 and step surface 21 Pressure and frictional force increase, realize that inner ring 4 and gear ring 5 produce relative rotation, occurred the purpose of sound；Between nut 6 and gear ring 5 Provided with plane bearing 8, nut 6 can be reduced by plane bearing 8 and relatively rotate caused abrasion with gear ring 5.

Further, as shown in figure 1, there is abutment face 13 on the inwall of drill point set 1, the side of inner ring 4 be resisted against to By on face 13；Jump-ring slot 14 is further opened with the inwall of drill point set 1；Be provided with jump ring 9 in jump-ring slot, the opposite side of inner ring 4 against On jump ring 9, axial limiting so is formed to inner ring 4, ensure that the reliability that inner ring 4 is installed.

Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Although 1, drill point set has more been used herein；11st, convex key；12nd, slot to make way；13rd, abutment face；14th, jump-ring slot； 2nd, drill body；21st, step surface；3rd, clamping jaw；4th, inner ring；41st, shell fragment；41a, butting section；42nd, locating slot；5th, gear ring；51st, teeth groove；6、 Nut；7th, steel part set；8th, plane bearing；9th, the term such as jump ring, but it is not precluded from the possibility using other terms.Use these Term is used for the purpose of more easily describing and explaining essence of the present utility model；It is construed as any additional limit System is all disagreed with the utility model spirit.

Claims (8)

1. a kind of drill chuck of electric drill, including drill point set (1) and the drill body (2) of column, the drill point set (1) are set in the brill It can rotate on body (2) and around drill body (2), it is circumferentially distributed on the drill body (2) to have some inclined and threaded folder of tool Pawl (3), the clamping jaw (3) can be slided and rotate along own axes, it is characterised in that in being installed with the drill point set (1) Enclose (4), there is the shell fragment (41) to bend inwards on the inner ring (4), gear ring (5), the gear ring are arranged with the drill body (2) (5) there is teeth groove (51), the shell fragment (41) is resisted against on the teeth groove (51) on outer peripheral face；In the drill point set (1) also Provided with the nut (6) circumferentially fixed with drill point set (1), the nut (6) be set in the drill body (2) outside and with each folder Pawl (3) is threadedly coupled, and has step surface (21) on the outer peripheral face of the drill body (2), and the nut (6) can be towards described Move in terrace (21) direction；The step surface (21) is located at the both sides of the gear ring (5) with the nut (6) respectively.

2. the drill chuck of electric drill according to claim 1, it is characterised in that the shell fragment (41) is close to the inner ring (4) Side, the opposite side of the inner ring (4) offers locating slot (42), have on the inwall of the drill point set (1) with it is described fixed The convex key (11) that position groove (42) is engaged, the convex key (11) are embedded in the locating slot (42).

3. the drill chuck of electric drill according to claim 2, it is characterised in that the quantity of the locating slot (42) has several And it is distributed along the circumferential uniform intervals of inner ring (4)；The quantity of the convex key (11) it is identical with the quantity of the locating slot (42) and Both, which correspond, is set.

4. the drill chuck of the electric drill according to claim 1 or 2 or 3, it is characterised in that the shell fragment on the inner ring (4) (41) quantity has several and is distributed along the circumferential uniform intervals of inner ring (4)；Each shell fragment (41) with the gear ring (5) Teeth groove (51) leans.

5. the drill chuck of electric drill according to claim 4, it is characterised in that the shell fragment (41) is in bar shaped tabular, described One end of shell fragment (41) is connected on inner ring (4), the other end of the shell fragment (41) have in the middle part of inner ring (4) bending against Portion (41a)；The inwall of the drill point set (1) is provided with slot to make way (12), and the slot to make way (12) and the butting section (41a) are right It should set.

6. the drill chuck of the electric drill according to claim 1 or 2 or 3, it is characterised in that on the inwall of the drill point set (1) Steel part set (7) is inlaid with, the steel part set (7) and the outer peripheral face of the nut (6) are fitted close.

7. the drill chuck of the electric drill according to claim 1 or 2 or 3, it is characterised in that the nut (6) and the gear ring (5) plane bearing (8) is provided between.

8. the drill chuck of the electric drill according to claim 1 or 2 or 3, it is characterised in that on the inwall of the drill point set (1) With abutment face (13), the side of the inner ring (4) is resisted against on the abutment face (13)；On the inwall of the drill point set (1) It is further opened with jump-ring slot (14)；Be provided with jump ring (9) in the jump-ring slot (14), described in the opposite side of the inner ring (4) is resisted against On jump ring (9).