CN101422823B - Power tool - Google Patents
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- CN101422823B CN101422823B CN2007101352328A CN200710135232A CN101422823B CN 101422823 B CN101422823 B CN 101422823B CN 2007101352328 A CN2007101352328 A CN 2007101352328A CN 200710135232 A CN200710135232 A CN 200710135232A CN 101422823 B CN101422823 B CN 101422823B
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- power tool
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- chuck
- axle sleeve
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Abstract
The invention discloses a power tool, comprising a casing, a driving shaft which is arranged in the casing, and a chuck which is connected on the driving shaft and comprises a central body with a head part and a tail part. The tail part is used for being matched with the driving shaft to cause the central body to rotate along with the driving shaft, and the head part comprises an axial hole and a plurality of channels which are arranged at certain angles and intersect with the axial hole, a plurality of holding jaws are arranged in each channel in a sliding way, nuts are rotatablely arranged on the central body by screw-thread fit with the holding jaws, and the rotation of the nuts drives the holding jaws to move axially in the channels; the chuck is provided with only one sleeve which reciprocates axially between a first position and a second position, when the sleeve is in the first position, the nuts can rotate relatively to the casing, and when the sleeve is in the second position, the nuts can not rotate relatively to the casing. As the chuck is provided with only one sleeve, the structure is simple, and as the holding area of the sleeve is relatively large, the holding saves effort relatively and the operation is safe and convenient.
Description
Technical field
The present invention relates to a kind of power tool, especially a kind of brill class or screwdriver kind tool with quick compression chuck.
Background technology
Traditional brill class or screwdriver kind tool have casing, are arranged on the driving shaft on the casing, are connected the chuck on the driving shaft, and chuck is used for the clamping device head.
U.S. Pat 6,073,939 have disclosed a kind of brill class or screwdriver kind tool with quick compression chuck; Have casing and rotatable drive shaft; Chuck is connected on the driving shaft, and this chuck comprises the centerbody with head and afterbody, thereby said aft mounted being used for makes centerbody follow driving shaft to rotate with the driving shaft cooperation; Said head comprises axial hole and some angled settings and the passage that intersects with said axial hole; Some jaws slidably are positioned at each passage, and each jaw comprises that a pawl face is formed at a side and thread-shaped is formed in opposite side, nut through with jaw on rotatable being installed on the said centerbody of threaded engagement; Thereby make the rotation drive jaw of nut in passage, move axially; First sleeve, second sleeve, one in first sleeve and said second sleeve is axially back and forth between first state and second state.
At first state is under the manual state, and first sleeve is non-rotatable to be connected on the centerbody, and second sleeve is non-rotatable to be connected on the nut, and second sleeve is rotatable with respect to casing and centerbody.
At second state is under the auto state, non-rotatable being connected on nut and the housing in first sleeve and second sleeve, and rotatable with respect to centerbody.
The above-mentioned chuck that is used on type of boring or the screwdriver kind tool has two sleeves, manually during compression chuck, needs one to hold first sleeve, and another holds second sleeve, relatively rotates first sleeve and second sleeve is realized compression chuck; Automatically during compression chuck, need move axially in first sleeve and second sleeve and the relative casing of nut is fixed.
Above-mentioned chuck has two sleeves, complex structure, and also the gripping surface of each sleeve is less, grips relatively effort, inconvenient operation; During manual and automatic compression chuck, two mutual displacements of sleeve, the intersection of two sleeves hurts operator's hand easily.
Summary of the invention
The technical problem that the present invention will solve: a kind of power tool with quick compression chuck of simple in structure, easy-to-operate is provided.
The technical solution adopted for the present invention to solve the technical problems: a kind of power tool, comprise casing, be arranged on the driving shaft on the casing; Be connected the chuck on the driving shaft, said chuck comprises the centerbody with head and afterbody, thereby said aft mounted being used for makes centerbody follow driving shaft to rotate with the driving shaft cooperation; Said head comprises axial hole and some angled settings and the passage that intersects with said axial hole; Some jaws slidably are positioned at each passage, and each jaw comprises a pawl face and be formed at the screw thread of opposite side, nut through with jaw on screw thread cooperate rotatable being installed on the said centerbody; Thereby make the rotation drive jaw of nut in passage, move axially; Axially-displaceable is moving is set in the axle sleeve on the nut, and said chuck only has a sleeve, and said quill is to back and forth between the primary importance and the second place; Sleeve is under primary importance; Nut can rotate with respect to casing, and sleeve is under the second place, and nut can not rotate with respect to casing.
Beneficial effect of the present invention: chuck only has a sleeve, and is simple in structure, and the gripping surface of sleeve is bigger; Grip more laborsaving; And at manual or auto state, the operator only need grip sleeve on the other hand and make the sleeve axially reciprocating, easy-to-operate.
Preferably, said quill is to movably being set on the axle sleeve; Said chuck also comprises the fastening sleeve of close-fitting on nut, and said axle sleeve axially-displaceable is set on the said fastening sleeve movingly; Said fastening sleeve adjoins first protruding and second convexity that respectively extend radially outwardly out on the outer wall of two end faces, is formed with axially extended groove on the inwall of said axle sleeve, and the said first protruding and said axle sleeve groove connects; Fixedly install finite place piece on the front portion of said centerbody, said sleeve is provided with first ledge and second ledge, and said first ledge selectively connects with locating part, and said second ledge selectively connects with the end of axle sleeve; Flexible member is arranged between first ledge and the locating part; Said nut has front end face, and said centerbody is provided with annular protrusion, is provided with ball between the front end face of said nut and the annular protrusion.
Preferably, said power tool also comprises the clutch that is arranged on the casing; Said clutch comprises that at least one moves radially part; The said part that moves radially is ball or roller.
Ball or roller clutch, ball or roller and outer ring rolling friction, frictional force is little, consuming little energy.
Flexible member radially variable shape wherein, said clutch also comprises inner ring, outer ring and flexible member, and said inner ring is fixed on the casing, saidly moves radially part and said outer ring connects, to be arranged to move radially between part and the inner ring; Said flexible member is a spring; Said outer ring has first field of conjugate action and second field of conjugate action, saidly moves radially selectable and said first field of conjugate action of part and second field of conjugate action connects; Said power tool also has the baffle plate that fixedly installs with respect to casing, and said outer ring is arranged in the said baffle plate; Said outer ring is provided with axially extended end tooth, and said axle sleeve is provided with mounting hole, and mounting hole selectively meshes with the outer ring end tooth.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is carried out concrete elaboration.
Fig. 1 is the phantom of power tool first embodiment of the present invention, and at this moment, the chuck of power tool is in the normal state.
Fig. 2 is the phantom of power tool first embodiment of the present invention, and at this moment, the chuck of power tool is in manual state.
Fig. 3 is the phantom of power tool first embodiment of the present invention, and at this moment, the chuck of power tool is in auto state.
Fig. 4 is collet segment and a clutch three-dimensional exploded view partly among power tool first embodiment of the present invention.
Fig. 5 is the cutaway view of clutch among power tool first embodiment of the present invention.
Fig. 6 is the phantom of power tool second embodiment of the present invention, and at this moment, the chuck of power tool is in the normal state.
Fig. 7 is the phantom of power tool second embodiment of the present invention, and at this moment, the chuck of power tool is in auto state.
The three-dimensional exploded view of collet segment and clutch part among Fig. 8 power tool second embodiment of the present invention.
Fig. 9 is the stereogram of lock tube and sliding sleeve among power tool second embodiment of the present invention.
Figure 10 is the cutaway view of clutch among power tool second embodiment of the present invention.
Figure 11 is the phantom of power tool the 3rd embodiment of the present invention, and at this moment, the chuck of power tool is in the normal state.
Figure 12 is the phantom of power tool the 3rd embodiment of the present invention, and at this moment, the chuck of power tool is in manual state.
Figure 13 is the phantom of power tool the 3rd embodiment of the present invention, and at this moment, the chuck of power tool is in auto state.
Figure 14 is the stereogram of power tool the 3rd embodiment middle sleeve of the present invention.
Figure 15 is the stereogram of fastening sleeve among power tool the 3rd embodiment of the present invention.
Figure 16 is the stereogram of power tool the 3rd embodiment bottom bracket axle of the present invention.
Wherein:
1, chuck 2, the second sleeves 3, centerbody 4, jaw
5, nut 6, front portion 7, rear portion 8, axial hole
9, screwed hole 10, ledge 11, pad 12, groove
13, regulating element 14, stage clip 15, casing 16, baffle plate
17, jaw root 18, clutch 19, clutch 21, baffle ring
20, driving shaft 22, passage 23, engaging piece 24, threaded portion
25, thrust ring 26, resettlement section 27, bearing washer 28, bearing cage
29, ball 30, jaw guide groove 31, front end face 32, convexity
33, groove 34, ball 35, internal thread 36, host cavity
37, upper surface 40, fastening sleeve 42, ledge 43, locating part
44, ledge 45, the axle collar 46, groove 47, convexity
49, the first protruding 50, the second convexities 51, end 52, end
55, axle sleeve 56, groove 58, ledge 59, lower surface
60, upper surface 61, ledge 62, end tooth 63, support portion
64, end 70, the first sleeves 73, groove 74, ledge
76, flexible member 80, outer ring 801, center line 81, front end face
82, convexity 83, end tooth 84, flexible member 85 moves radially part
86, inner ring 87, the first fields of conjugate action 88, the second fields of conjugate action 89, blind hole
90, axle sleeve 91, upper surface 92, end tooth 93, groove
94, end 95, flexible member 96, groove 100, sliding sleeve
101,103, the second inclined-planes 104, helical teeth 102, the first inclined-planes, keyway
105, end face 106, end face 107, accepting groove 110, flexible member
115, limiting gasket 120, lock tube 121, groove 122, end tooth
124, the second inclined-planes 125,123, the first inclined-planes, lock collar 126, flexible member
130, pressing plate 131, groove 132, groove 134, end face
140, setting element 141, opening 142, key 143, ledge
144, clasp 145, end 150, regulating element 151, groove
152, end 153, screw thread 154, groove 155, spring base
156, screw thread 157, ledge 160, flexible member 165, packing ring
166, pressing element 170, internal gear 171, end face 172, end tooth
174, the second inclined-planes 175,173, the first inclined-planes, tooth 180, planetary gear
181, external tooth 185, planet carrier 190, motor output shaft 191, planetary gear
192, planet carrier 200, sleeve 201, groove 202, the first ledges
203, the second ledges 205, flexible member 206, locating part 210, fastening sleeve
211, end face 212, end face 213, the first protruding 214, the second convexities
230, axle sleeve 231, groove 232, mounting hole 233, bracing frame
234, groove 235, end face 236, end face 237, convexity
238, lower surface 240, flexible member 250, regulating element
The specific embodiment
The present invention is preferred embodiment with the electric drill.Electrodill has casing 15, is arranged on the driving shaft 20 in the casing, is installed in the chuck 1 on the driving shaft 20.
Referring to figs. 1 through shown in Figure 5, in the first preferred embodiment of the invention, chuck 1 has second sleeve 2, centerbody 3, jaw 4 and nut 5.Centerbody 3 is a centerbody, has front portion 6 and rear portion 7.Forwardly be formed with axial hole 8 in 6, the diameter of axial hole 8 is bigger than the maximum gauge of chuck 1 clamping tools shank.In rear portion 7, be formed with the screwed hole 9 of standard-sized column, the driving shaft 20 of the column on screwed hole 9 and the electric drill cooperates.Screwed hole 9 also can be standard-sized bellmouth, is used for cooperating with the driving shaft 20 of taper.
On centerbody 3, be formed be 22,3 passages 22 of 3 passages that hexagonal angle is provided with each other center line respectively with the angled setting of the axis of chuck 1, and intersect on the axis of chuck 1 a bit, this point is positioned at the front end of chuck 1.3 jaws 4 are housed in respectively in 3 passages 22 movably.Each jaw 4 all has engaging piece 23 and the threaded portion 24 that is parallel to chuck 1 axis, and threaded portion 24 is arranged on the offside of engaging piece 23.
Be fixedly connected finite place piece 43 on the rear portion 9, when chuck 1 was opened fully, the rearward end butt of locating part 43 and jaw 4 prevented to retreat because of jaw 4 transition screw thread 24 interlocks of the root 17 that causes jaw 4 and nut 5.
Centerbody 3 comprises thrust ring 25, and is preferred, and thrust ring 25 is one-body molded with centerbody 3.Thrust ring 25 also can be for being fixedly mounted on the independent part on the centerbody 3.Be formed with on the thrust ring 25 and be used to accommodate the resettlement section 26 of bearing assembly of being described below.Thrust ring 25 comprises that a plurality of jaw guide grooves 30 around its circumference setting are used to accommodate jaw 4.
On centerbody 3, be provided with annular groove 33 near thrust ring 25 places, nut 5 is arranged in the groove 33.The bearing cage 28 of bearing washer 27 and annular is housed between thrust ring 25 and the nut 5.Bearing cage 28 is supported with a plurality of balls 29.Ball 29 is used for cooperating with the upper surface 37 of nut 5.
Because anterior 6 diameter is bigger, nut 5 is set to have the internal thread 35 that cooperates with the screw thread 24 of jaw 4 along two parts of diameter separation.When nut 5 rotated with respect to centerbody 3, jaw 4 can be urged into or retract.The end that nut 5 deviates from upper surface 37 forms the front end face 31 of annular, and formation host cavity 36 between front end face 31 and the convexity 32 that takes shape in the annular on the centerbody 3 contains a plurality of balls 34 in the host cavity 36.
After nut 5 was assembled on the centerbody 3, fastening sleeve 40 was tightened to one with two parts of nut 5.The axle collar 45 press fit on the fastening sleeve 40; Fastening sleeve 40 adjoins on the inwall of lower surface 41, and to internally extending ledge 44, ledge 44 is provided with a plurality of grooves 46; The axle collar 45 inwalls are provided with ledge 42; A plurality of protruding 47 to internally extending on the ledge 42, protruding 47 are meshed with groove 46, and ledge 44 meshes with ledge 42.
The axle collar 45 adjoins on the outer wall of two ends 51,52, respectively extends outward a plurality of first protruding 49, the second convexities 50, and protruding 49,50 quantity, shape are identical, and be preferred, and protruding 49,50 are 3.First protruding 49 is used for and groove 56 engagements that take shape on axle sleeve 55 inwalls, second protruding 50 be used for take shape in first sleeve, 70 inwalls on groove 73 be meshed.
Extend the stepped ledge 58 of annular on the inwall of axle sleeve 55, referring to shown in Figure 1, the lower surface 59 of ledge 58 cooperates with the upper surface of bearing washer 27.
To shown in Figure 5, axle sleeve 55 adjoins on the inwall of upper surface 60 referring to Fig. 1, to the ledge 61 that internally extends annular, forms the support portion 63 of a plurality of axially extended end teeth 62 and annular on the ledge 61.
The ledge 10 of second sleeve 2 through annular cooperates with the groove 12 of annular on being molded over centerbody 3, thereby is arranged on rotationally on the centerbody 3, second sleeve 2 move axially 11 restrictions of pad that are set in the groove 12.
To shown in Figure 5, clutch 18 is arranged on the casing 15 referring to Fig. 1, and clutch 18 comprises inner ring 86, outer ring 80, flexible member 84 and moves radially part 85.
On inner ring 86, be set with ring baffle 16, outer ring 80 is arranged in the baffle plate 16, and the front end face of baffle plate 16 is provided with baffle ring 21, and baffle plate 16 is used to prevent that outer ring 80 from moving radially.Adjoin on the inwall of front end face 81 to the convexity 82 that internally extends annular outer ring 80, forms a plurality of axially extended end teeth 83 on protruding 82.Radially form a plurality of blind holes 89 on the inner ring 86, preferred, the quantity of blind hole 89 is 4, all contains flexible member 84 in each blind hole 89 and moves radially part 85.
Preferably, flexible member 84 is a spring, moves radially part 85 and is ball.Move radially part 85 and also can be roller.
Further referring to shown in Figure 5, outer ring 80 has the field of conjugate action 87,88, and first field of conjugate action 87 is α with the angle of outer ring center line 801, and second field of conjugate action 88 is β with the angle of outer ring center line 801, α＜β.
Preferably, α is 30 °, and β is 33 °.
Regulating element 13 is set on the clutch 18.
With first sleeve 70 from position shown in Figure 1 along B to pushing away forward, overcome the elastic force of stage clip 14, until the second protruding 50 fully engagement of the groove of first sleeve 70 73 with the axle collar 45; The groove 56 of axle sleeve 55 keeps engagement with first protruding 49 of the axle collar 45, and referring to shown in Figure 2, chuck 1 is in manual state; First sleeve 70 is in primary importance, and at this moment, driving shaft 20 driven shafts lock (not shown) pins and can not rotate; The operator rotates first sleeve 70 and second sleeve 2 with held first sleeve 70, drives the axle sleeve 55 and the axle collar 45, nut 5 around centerbody 3 rotations; Closed or open chuck 1, thus clamp or the releasing tool head.
When along C when rotating first sleeve 70; The rotation of first sleeve 70 drives nut 5 equidirectional rotations; The rotation of nut 5 drive jaw 4 along towards the direction of the front portion 6 of centerbody 3 at passage 22 intrinsic displacements, until the engaging piece 23 of jaw 4 with the tool shank engagement and clamp.Owing between the upper surface 37 of resettlement section 26 and nut 5, be provided with bearing bracket stand 28 and ball 29; Nut 5 along C when rotating; The upper surface 37 of nut 5 cooperates with ball 29; Nut 5 just rotates on ball 34, and the loss of frictional force is reduced to minimum, and most driving torque is converted into clamping force and is applied on the tool shank.
On the other hand; If between the upper surface 37 of resettlement section 26 and nut 5, ball 28 is not set, resettlement section 26 direct and upper surface 37 engagements are when nut 5 rotates; Frictional force between nut 5 and the centerbody 3 can be very big; When the engaging piece of jaw 4 23 during with the tool shank engagement, continue again along C to rotating nut 5, the upper surface 37 of nut 5 just is interlocked with resettlement section 26.When needs back off tool shank, need be along D to rotating nut 5, at this moment, the upper surface 37 of nut 5 just is interlocked with resettlement section 26, and rotational sleeve 70 is effort quite, even at all can't rotational sleeve 70.
And owing between the upper surface 37 of resettlement section 26 and nut 5, be provided with ball 28; When the engaging piece 23 of jaw 4 meshes with tool shank; Continue again along C to rotating nut 5, nut 5 not can with steel ball 28 interlocks, rotational sleeve 70 gently; Nut 5 is easy to along D to rotation, thus the back off tool shank.
When along D when rotating first sleeve 70; The rotation of first sleeve 70 drives nut 5 equidirectional rotations; The rotation of nut 5 drive jaw 4 along the direction of the front portion 6 that deviates from centerbody 3 at passage 22 intrinsic displacements, until the rear end and locating part 43 butts of jaw 4, chuck 1 is just opened fully.Locating part 43 can prevent screw thread 35 interlocks of root 17 with the nut 5 of jaw 4.
When with first sleeve 70 by position shown in Figure 1 along A to pusher; Groove 73 until first sleeve 70 breaks away from engagement with second protruding 50 of the axle collar 45; The upper surface of the baffle ring 74 of first sleeve 70 and 64 engagements of the end of axle sleeve 55 continue to promote first sleeve 70, and the elastic force that drive axle sleeve 55 overcomes flexible member 76 moves backward; Mesh until the end tooth 62 of axle sleeve 55 and the end tooth 83 of clutch 18, the groove 56 of axle sleeve 55 still keeps engagement with first protruding 49 of the axle collar 45.
The baffle ring 74 of first sleeve 70 is between first convexity 49 and 50 of axle sleeve 55, and first sleeve 70 can rotate with respect to axle sleeve 55, and referring to shown in Figure 3, at this moment, chuck 1 is in auto state, and first sleeve 70 is in the second place.
Referring to Fig. 3, shown in Figure 4, axle sleeve 55 is combined as a whole with the outer ring 80 of clutch 18, because the flexible member 84 that is arranged in the inner ring 86 will move radially the field of conjugate action 87 that part 85 is pressed on outer ring 80; On 88, outer ring 80 just becomes one with inner ring 86, and inner ring 86 is fixedly installed in the housing 1; Thereby axle sleeve 55 is just fixing with respect to housing 1, at this moment; Start electric drill, the rotation of driving shaft 20 drives centerbody 3 and rotates with respect to nut 5, thereby opens or closed chuck 1.Under this state, the operator is needs one held electric drill only, and another hand is used for gripping the tool heads that needs are clamped or discharge.
When driving shaft 20 drives centerbodies 3 along F during to rotation, jaw 4 rotates with respect to nut 5, and along towards the direction of the front portion 6 of centerbody 3 at passage 22 intrinsic displacements, until the field of conjugate action 23 and the tool shank engagement of jaw 4, chuck 1 just clamps tool heads.At this moment; Can not produce mutual motion between jaw 4 and the nut 5, centerbody 3 just is combined into one with jaw 4, nut 5 and fastening sleeve 40, the axle collar 45, axle sleeve 55, driving shaft 20 rotation and the torsion that is delivered to the outer ring 80 of clutch 18 has overcome the elastic force that is arranged on the flexible member 84 in the inner ring 86; Moving radially part 85 just climbs on second field of conjugate action 88; Clutch outer ring 80 just begins to skid, thereby prevents excessive closed chuck 1, has also prevented motor (not shown) stall.The effect of ball 28 is identical with manual state, repeats no more here.
When driving shaft 20 drive centerbodies 3 along E when rotating, jaw 4 along towards the direction of locating part 43 at passage 22 intrinsic displacements, when jaw 4 retreats to afterbody and meshes with locating part 43; Can not produce mutual motion between jaw 4 and the nut; Centerbody 3 just is combined into one with jaw 4, nut 5 and fastening sleeve 40, the axle collar 45, axle sleeve 55, at this moment, and driving shaft 20 rotation and the torsion that is delivered to the outer ring 80 of clutch 18 has overcome the elastic force that is arranged on the flexible member 84 in the inner ring 86; Moving radially part 85 just climbs on first field of conjugate action 88; Clutch outer ring 80 just begins to skid, thereby prevents excessively to open chuck 1, has also prevented motor (not shown) stall.
Owing to be provided with ball 34 at centerbody protruding 32 and 31 of nut front end faces; Behind the afterbody and locating part 43 engagements of jaw 4; Locating part 43 contacts with ball 34 through the front end face 31 that jaw 4 is compressed to nut 5 forward nut 5; For rolling friction, centerbody 3 continues along E to rotation again between centerbody 3 and the nut 5, centerbody protruding 32 not can with nut 5 interlocks.Afterwards, centerbody 3 again along F to rotation and closed chuck 1 can be very laborsaving, chuck 1 can be by quick-make.
Because the angle of first field of conjugate action 87 and outer ring center line 801 is less than the angle β of second field of conjugate action 88 with outer ring center line 801; Move radially part 85 power that the power that consumed climbs and consumed on second field of conjugate action 88 greater than steel ball 86 of on first field of conjugate action 87, climbing, thereby discharge the used torsion of chuck 1 greater than the used torsion of locking chuck 1.
Extremely shown in Figure 10 referring to Fig. 6; In the second preferred embodiment of the invention, extend two end teeth 92, form the groove 93 of annular on the inwall of axle sleeve 90 near upper surface 91 along the upper surface 91 of axle sleeve 90; Described in embodiment one, first sleeve 70 is set on the axle sleeve 90.Form locating surface 38 and symmetrically arranged two keys 39 on the rear portion 7 of centerbody 3.
In the present embodiment, do not do with embodiment one identical structure and to give unnecessary details.
Sliding sleeve 100 is set on the rear portion 7 of centerbody 3, forms symmetrically arranged two keyways 104 on the inwall of sliding sleeve 100, and after the assembling, keyway 104 connects with key 39, and sliding sleeve 100 just can endwisely slip with respect to centerbody 3.
To shown in Figure 9, extend symmetrically arranged two helical teeth 101 (only showing among the figure) referring to Fig. 6 on the end face 106 of sliding sleeve 100, helical teeth 101 has first inclined-plane 102,103.Form the accepting groove 107 of annular on the sliding sleeve 100.
Limiting gasket 115 is fixedly mounted between the shoulder 16 and key 39 of output shaft 20.Flexible member 110 is arranged between accepting groove 107 and the limiting gasket 115, and flexible member 110 directions of edge towards the front portion 6 of centerbody 3 compress, and make the end face 105 of sliding sleeve 100 connect with locating surface 38.
After the assembling, sliding sleeve 100 is positioned at axle sleeve 90.
To shown in Figure 10, lock tube 120 is set on the output shaft 20 referring to Fig. 6.Lock tube 120 has the lock collar 125 of annular, and an end face upper edge of lock collar 125 extends axially out 4 end teeth 122, and end tooth 122 is along the diameter symmetry setting of lock collar 125.The groove 121 of symmetrically arranged 2 annulars of lock collar 125 upper edge diametric(al)s, groove 121 has first inclined-plane 123 and second inclined-plane 124.
The pressing plate 130 of annular is fixedly installed on the casing 15, forms two grooves 131 that are provided with along diameter symmetry on the end face 134 of pressing plate 130.Form 4 grooves 132 that along the circumferential direction are uniformly distributed with on the inwall of pressing plate 130, groove 132 be used for sliding sleeve 120 on end tooth 122 connect.
Referring to shown in Figure 6, pressing plate 130 is provided with the groove 134 of annular.Flexible member 95 is arranged between the groove 134 and the groove 93 on the axle sleeve 90 of pressing plate 130, and flexible member 126 is arranged between pressing plate 130 and the lock tube 120 and with lock tube 120 and is resisted against on the limiting gasket 115.Lock tube 120 fixedly installs with respect to casing 15.
Referring to shown in Figure 8, form 3 grooves 151 on the end 152 of regulating element 150, form a plurality of grooves 154 on the inwall near end 152 of regulating element 150.Form screw thread 153 on the inwall, screw thread 153 be used for spring base 155 on screw thread 156 engagement.
Extend outward 3 keys 142 on the excircle of the setting element 140 of annular, setting element 140 along the circumferential direction forms two fasteners 144.Setting element 140 is symmetrically arranged with two openings 141 than the ledge 143 that extends internally out on the inwall that connects end 145 on the ledge 143, preferred, opening 141 length along the circumferential direction and the equal in length of the groove 131 on the pressing plate 130.Opening 141 length along the circumferential direction also can be longer than the length of the groove on the pressing plate 130 131.
Further referring to shown in Figure 6, in the off working state of chuck 1, key 142 meshes with groove 151, and fastener 144 is resisted against on the groove 154, and setting element 140 is set on the pressing plate 130, and ledge 143 blocks groove 131.
To shown in Figure 8, clutch 19 comprises internal gear 170, pressing element 166, packing ring 165 and flexible member 160 referring to Fig. 6.
Be provided with pressing element 166 and packing ring 165 in the housing 15, pressing element 166 is arranged between the end face 171 of packing ring 165 and internal gear 170, and flexible member 160 is arranged on packing ring 165 and is molded between the ledge 157 of spring base 155.Flexible member 160 is resisted against pressing element 166 on the end face 171 of internal gear 170.
Preferably, pressing element 166 is a rolling element, such as roller, and ball etc.
Preferably, flexible member 160 is a spring.
Referring to shown in Figure 10, first inclined-plane 173 of internal gear 170 is α ' with the angle of the axis X of internal gear 170, and second inclined-plane 174 of internal gear 170 is β ' with the angle of the axis X of internal gear 170, α ' β '.Preferably, α ' is 47 °, and β ' is 50 °.
When this programme chuck 1 was in manual state and first sleeve 70 and is in primary importance, the mode of open and close chuck 1 was identical with the mode of embodiment one, repeats no more here.
Referring to shown in Figure 6, at this moment, chuck 1 is in off working state, and first sleeve 70 can rotate with respect to axle sleeve 90, and second sleeve 2 can rotate with respect to centerbody 3.Rotate first sleeve 70 and second sleeve 2 and all can not drive nut 5 around centerbody 3 rotations.
Rotate regulating element 150, drive setting element 140 rotations, when regulating element 150 forwarded the 23rd gear to, the opening 141 on the ledge 143 alignd with groove 131 on the pressing plate 130.At this moment, the position axis that first sleeve, 70 edges are shown in Figure 6 meshes until the groove 73 and second protruding 50 disengagings of the axle collar 45 of first sleeve 70 to pusher; The upper surface of the baffle ring 74 of first sleeve 70 and 94 engagements of the end of axle sleeve 90 continue to promote first sleeve 70, and the elastic force that drive axle sleeve 90 overcomes flexible member 95 moves backward; Mesh until the end tooth 92 of axle sleeve 90 and the groove 131 of pressing plate 130; The groove 96 of axle sleeve 90 remains engagement with first protruding 49 of the axle collar 45, and the baffle ring 74 of first sleeve 70 is between first protruding 49 and second convexity 50 of the axle collar 45, and first sleeve 70 can rotate with respect to axle sleeve 90; Referring to shown in Figure 7; At this moment, chuck 1 is in auto state, and first sleeve 70 is in the second place.
The end tooth 92 of axle sleeve 90 meshes together with the groove 131 of pressing plate 130, and axle sleeve 90 just is combined as a whole with pressing plate 130, because pressing plate 130 is fixed in the housing 19, axle sleeve 90 is just fixing with respect to housing 19.At this moment, start electric drill, the rotation of motor output shaft 190 drives planetary gear 191,180 and planet carrier 185 rotations; Because planet carrier 185 is fixed on the driving shaft 20; Driving shaft 20 just is driven to rotate, and drives centerbody 3 and rotates with respect to nut 5, thereby open or closed chuck 1.Under this state, the operator is needs one held electric drill only, and another hand is used for gripping the tool heads that needs are clamped or discharge.
Referring to shown in Figure 7, when driving shaft 20 when the J direction is rotated, jaw 4 rotates with respect to nut 5, and along the direction of the front portion 6 that deviates from centerbody 3 at passage 22 intrinsic displacements, until the end face 105 of the afterbody of jaw 4 and sliding sleeve 100 against.Because sliding sleeve 100 is to be connected anti-rotation through key to link together with centerbody 3; Thereby the rotation of centerbody 3 drives sliding sleeve 100 equidirectional rotations; When jaw 4 continued to continue displacement along the direction of the front portion 6 that deviates from centerbody 3, jaw 4 promoted the equidirectional displacement of elastic force that sliding sleeves 100 overcome flexible member 110.
Extremely shown in Figure 9 referring to Fig. 7; When first inclined-plane 102 of the helical teeth 101 of sliding sleeve 100 touches first inclined-plane 123 of groove 121 of lock tube 120; Groove 121 is just drawn in helical teeth 101 in first inclined-plane 123, and sliding sleeve 100 just in axial direction is pulled away from the afterbody of jaw 4 by lock tube 120.At this moment, the afterbody of jaw 4 and lock tube 120 break away from engagement.Centerbody 3 is combined as a whole with sliding sleeve 100 and casing 15, because centerbody 3 is fixed together with driving shaft 20, thereby driving shaft 20 is just by locking, the convexity 32 of centerbody 3 just not can with front end face 31 interlocks of nut 5.
At this moment; Thereby drive planet carrier 192 rotations because motor output shaft 190 still drives planetary gear 191 rotations, the rotation of planet carrier 192 drives planetary gear 180 and rotates, and the rotating drive internal gear 170 of planetary gear 180 rotates; Just climbing on the end tooth 172 of internal gear 170 of pressing element 166; Nut 5 just can be by not overtighten, thereby prevented excessively to open chuck 1, prevented motor (not shown) stall yet.
When driving shaft 20 when the K direction is rotated, jaw 4 rotates with respect to nut 5, and along towards the direction of the front portion 6 of centerbody 3 at passage 22 intrinsic displacements, until the field of conjugate action 23 and the tool shank engagement of jaw 4, chuck 1 just clamps tool heads.At this moment, can not produce mutual motion between jaw 4 and the nut 5, driving shaft 20 is by locking; And thereby motor output shaft 190 still drives 192 rotations of planetary gear 191 rotation driving planet carriers, and the rotation of planet carrier 192 drives planetary gear 180 and rotates, and the rotating drive internal gear 170 of planetary gear 180 rotates; Just climbing on the end tooth 172 of internal gear 170 of pressing element 166; Nut 5 just can be by not overtighten, thereby prevented excessive closed chuck 1, prevented motor (not shown) stall yet.
Identical among ball 28 roles and the embodiment one do not done here and given unnecessary details.
When driving shaft 20 when the K direction is rotated; Second inclined-plane 124 of groove 121 just promotes second inclined-plane 103 of helical teeth 101, and helical teeth 101 just breaks away from groove 121, afterwards under the elastic force of flexible member 110; Sliding sleeve 100 is just along the moving axially of centerbody 3, until end face 105 and locating surface 38 engagements.
To shown in Figure 16, in the present invention's the 3rd preferred embodiment, chuck 1 is single collet, promptly only has a sleeve 200 referring to Figure 11.Below only this preferred embodiment and the difference of preferred embodiment one are described.The label of the part identical with first preferred embodiment is identical in the present embodiment, repeats no more here.
The inwall of sleeve 200 is provided with first ledge 202 and second ledge 203.
Extend the convexity 237 of annular on the inwall of axle sleeve 230, protruding 237 lower surface 238 cooperates with the upper surface of bearing washer 27.
With sleeve 200 by position shown in Figure 11 along N to pushing away forward, overcome the elastic force of flexible member 205, until the second protruding 214 fully engagement of the groove of sleeve 201 with fastening sleeve 210; The groove 231 of axle sleeve 230 keeps engagement with the convexity of fastening sleeve 210 223, and referring to shown in Figure 12, chuck 1 is in manual state; Sleeve 200 is in primary importance, and at this moment, driving shaft 20 driven shafts lock (not shown) pins and can not rotate; The operator is with hand rotational sleeve 200; Drive fastening sleeve 210 and nut 5 and rotate around centerbody 3, closed or open chuck 1, thus clamp or the releasing tool head.
When with sleeve 200 by position shown in Figure 11 along M to pusher, break away from engagement until the groove 201 and second protruding 214 of the fastening sleeve 210 of sleeve 200, the upper surface of second ledge 203 of sleeve meshes with the end of axle sleeve 230 236; Continue to promote sleeve 200, the elastic force that drive axle sleeve 230 overcomes flexible member 240 moves backward, meshes until the mounting hole 232 of axle sleeve 230 and the end tooth 83 of clutch 18; The groove 231 of axle sleeve 230 still keeps engagement with first protruding 213 of fastening sleeve 210; At this moment, second ledge 203 of sleeve 200 is between first protruding 213 and second protruding 214, and sleeve 200 can rotate with respect to axle sleeve 230; Referring to shown in Figure 13; At this moment, chuck 1 is in auto state, and sleeve 200 is in the second place.
Referring to shown in Figure 13, axle sleeve 230 is combined as a whole with the outer ring 80 of clutch 18, because the flexible member 84 that is arranged in the inner ring 86 will move radially the field of conjugate action 87 that part 85 is pressed on outer ring 80; In 88, outer ring 80 just becomes one with inner ring 86, and inner ring 86 is fixedly installed on the casing 15; Thereby axle sleeve 230 is just fixing with respect to casing 15, at this moment, starts electric drill; The rotation of driving shaft 20 drives centerbody 3 and rotates with respect to nut 5, thereby opens or closed chuck 1.Under this state, the operator is needs one held electric drill only, and another hand is used for gripping the tool heads that needs are clamped or discharge.
When the position that chuck 1 reaches complete closure or opens; Driving shaft 20 rotation and the torsion that is delivered to outer ring 80 has overcome the elastic force that is arranged on the flexible member 84 in the inner ring 86; Move radially just 80 the field of conjugate action 87 selectively of part 85 in the outer ring; Climbing on 88, thus prevented excessively to open or closed chuck 1, also prevented motor (not shown) stall.
With embodiment one, discharge the torsion of the torsion of chuck 1 greater than locking chuck 1.
Those skilled in the art can know that second sleeve 70 and first sleeve 2 can replace to the single sleeve 200 that is disclosed in the preferred embodiment three in the preferred embodiment two.
Claims (11)
1. power tool; Comprise casing (15); Be arranged on the driving shaft (20) in the casing (15), be connected the chuck (1) of (20) on the driving shaft, said chuck (1) comprises the centerbody (3) of have head (6) and afterbody (7); Said afterbody (7) is provided be used for driving shaft (20) thus cooperate make centerbody (3) and then driving shaft (20) rotate; Said head (6) comprises axial hole (8) and some angled settings and the passage (22) that intersects with said axial hole (8), and some jaws (4) slidably are positioned at each passage (22), and each jaw (4) comprises pawl face (23) and is formed at the screw thread (24) of opposite side; Nut (5) through with jaw (4) on screw thread (24) cooperate rotatable being installed on the said centerbody (3), move axially in passage (22) thereby make the rotation of nut (5) drive jaw (4); Axially-displaceable is moving is set in the axle sleeve (230) on the nut (5), and it is characterized in that: said power tool also comprises the clutch (18) that is arranged on the casing (15), and said clutch (18) comprises that inner ring (86), outer ring (80), flexible member (84) and at least one move radially part (85); Flexible member (84) radially variable shape said inner ring (86) is fixed on the casing (15), to be arranged to move radially between part (85) and the inner ring (86), and said outer ring (80) are provided with axially extended end tooth (83); Said axle sleeve (230) is provided with mounting hole (232); Mounting hole (232) selectively meshes or does not mesh with outer ring end tooth (83), and said chuck only has a sleeve (200), and said sleeve (200) is axially back and forth between the primary importance and the second place; Sleeve (200) is under primary importance; The mounting hole (232) of axle sleeve (230) does not mesh with the outer ring end tooth (83) of clutch (18), and nut (5) can be with respect to casing (15) rotation, and sleeve (200) is under the second place; The mounting hole (232) of axle sleeve (230) and the engagement of the outer ring end tooth (83) of clutch (18); The outer ring (80) of axle sleeve (230) and clutch (18) is combined as a whole, and is arranged on flexible member (84) in the inner ring (86) and will moves radially in the field of conjugate action (87,88) that part (85) is pressed on outer ring (80); Outer ring (80) just becomes one with inner ring (86); Inner ring (86) is fixedly installed on the casing, and axle sleeve (230) is just fixing with respect to casing (15), and nut can not rotate with respect to casing.
2. power tool according to claim 1 is characterized in that: what said sleeve (200) axially-displaceable was moving is set on the axle sleeve (230).
3. power tool according to claim 1 is characterized in that: said chuck (1) also comprises the fastening sleeve (210) of close-fitting on nut (5), and said axle sleeve (230) axially-displaceable is set on the said fastening sleeve (210) movingly.
4. power tool according to claim 1; It is characterized in that: said fastening sleeve (210) adjoins two end faces (211; 212) first convexity that respectively extends radially outwardly out on the outer wall (213) and second convexity (214); Be formed with axially extended groove (231) on the inwall of said axle sleeve (230), said first convexity (213) connects with said axle sleeve groove (231).
5. power tool according to claim 1; It is characterized in that: fixedly install finite place piece (206) on the front portion (6) of said centerbody (3); Said sleeve (200) is provided with first ledge (202) and second ledge (203); Said first ledge (202) selectively connects or does not connect with locating part (206), and said second ledge (203) selectively connects or do not connect with the end (236) of axle sleeve (230).
6. power tool according to claim 5 is characterized in that: flexible member (205) is arranged between first ledge (202) and the locating part (206).
7. power tool according to claim 1 is characterized in that: said nut (5) has front end face (31), and said centerbody (3) is provided with annular protrusion (32), is provided with ball (34) between the front end face (31) of said nut (5) and the annular protrusion (32).
8. power tool according to claim 1 is characterized in that: the said part (85) that moves radially is ball or roller.
9. power tool according to claim 1 is characterized in that: said flexible member (84) is a spring.
10. power tool according to claim 1; It is characterized in that: said outer ring (80) have first field of conjugate action (87) and second field of conjugate action (88), saidly move radially that selectable and said first field of conjugate action of part (85) (87) connects or connect with second field of conjugate action (88).
11. power tool according to claim 1 is characterized in that: said power tool also has the baffle plate (16) that fixedly installs with respect to casing (15), and said outer ring (80) are arranged in the said baffle plate (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101352328A CN101422823B (en) | 2007-11-01 | 2007-11-01 | Power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101352328A CN101422823B (en) | 2007-11-01 | 2007-11-01 | Power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101422823A CN101422823A (en) | 2009-05-06 |
| CN101422823B true CN101422823B (en) | 2012-07-18 |
Family
ID=40613822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101352328A Expired - Fee Related CN101422823B (en) | 2007-11-01 | 2007-11-01 | Power tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101422823B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI491477B (en) * | 2012-09-21 | 2015-07-11 | Nitto Kohki Co | Electric screwdriver |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248192B (en) * | 2010-05-21 | 2014-04-16 | 苏州宝时得电动工具有限公司 | Collet |
| CN104837427B (en) * | 2012-11-14 | 2017-09-22 | 不列颠哥伦比亚癌症机构分部 | Tubulose hammer drill accessory |
| CN107414745B (en) * | 2016-05-24 | 2024-01-09 | 苏州宝时得电动工具有限公司 | Chuck device and electric tool provided with same |
| CN111278590B (en) * | 2018-01-24 | 2021-07-09 | 捷可勃斯夹头制造（苏州）有限公司 | Chuck for use with power driver having rotatable drive shaft |
| CN210188575U (en) * | 2018-06-06 | 2020-03-27 | 苏州宝时得电动工具有限公司 | Hand-held power tool |
| US11203070B2 (en) * | 2018-06-07 | 2021-12-21 | Apex Brands, Inc. | Self-aligning chuck |
| DE102019115387A1 (en) * | 2019-06-06 | 2020-12-10 | Franz Haimer Maschinenbau Kg | Clamping device for clamping an object, in particular a tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128509A (en) * | 1993-08-13 | 1996-08-07 | 动力工具夹持器公司 | Chuck |
| CN1224646A (en) * | 1998-01-30 | 1999-08-04 | 动力工具霍德尔斯公司 | Chuck with jaw blade rotational stop |
| US6007071A (en) * | 1998-03-09 | 1999-12-28 | Power Tool Holders Incorporated | Chuck with locking body |
| US6073939A (en) * | 1998-06-05 | 2000-06-13 | Power Tool Holders Incorporated | Locking chuck |
| CN1500583A (en) * | 2002-11-18 | 2004-06-02 | ��Լ�عɷݹ�˾ | Tool holder with locking system |
| CN1915566A (en) * | 2005-07-01 | 2007-02-21 | 雅各布卡盘制造公司 | Chuck |
| CN201108969Y (en) * | 2007-11-07 | 2008-09-03 | 苏州宝时得电动工具有限公司 | Power tool |
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2007
- 2007-11-01 CN CN2007101352328A patent/CN101422823B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128509A (en) * | 1993-08-13 | 1996-08-07 | 动力工具夹持器公司 | Chuck |
| CN1224646A (en) * | 1998-01-30 | 1999-08-04 | 动力工具霍德尔斯公司 | Chuck with jaw blade rotational stop |
| US6007071A (en) * | 1998-03-09 | 1999-12-28 | Power Tool Holders Incorporated | Chuck with locking body |
| US6073939A (en) * | 1998-06-05 | 2000-06-13 | Power Tool Holders Incorporated | Locking chuck |
| CN1500583A (en) * | 2002-11-18 | 2004-06-02 | ��Լ�عɷݹ�˾ | Tool holder with locking system |
| CN1915566A (en) * | 2005-07-01 | 2007-02-21 | 雅各布卡盘制造公司 | Chuck |
| CN201108969Y (en) * | 2007-11-07 | 2008-09-03 | 苏州宝时得电动工具有限公司 | Power tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI491477B (en) * | 2012-09-21 | 2015-07-11 | Nitto Kohki Co | Electric screwdriver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101422823A (en) | 2009-05-06 |
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