CN200995285Y - Drill gripping head with self-locking function - Google Patents
Drill gripping head with self-locking function Download PDFInfo
- Publication number
- CN200995285Y CN200995285Y CN 200720103296 CN200720103296U CN200995285Y CN 200995285 Y CN200995285 Y CN 200995285Y CN 200720103296 CN200720103296 CN 200720103296 CN 200720103296 U CN200720103296 U CN 200720103296U CN 200995285 Y CN200995285 Y CN 200995285Y
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- CN
- China
- Prior art keywords
- cap
- drill chuck
- ratchet
- auto
- groove
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Drilling And Boring (AREA)
Abstract
A drill chuck with self-lock function comprises a body (5), a front cap (2), a back cap (1), a bearing component (8), three gripping jaws (6), a retaining cover (4) and a nut (7). The body (5) is connected to the back cap (1), and three gripping jaws (6) are passed through three inclined holes of the body (5). The nut (7) is arranged at the middle of the body (5) and connected to the front cap (2), and meanwhile engaged to the thread of three gripping jaws (6) and drives three gripping jaws (6) to move. The bearing component (8) for driving the free rotation of the front cap (2) is arranged between the front cap (2) and the body (5). The utility model is characterized in that a ratchet (50) is arranged on the front end surface of the body (5); a limit cap (3) is arranged between the front cap (2) and the retaining cover (4); a flexible device (11) is arranged between the limit cap (3) and the front cap (2); and the limit cap (3) can be rotated to an angle with the front cap (2) and drives the flexible device (11) or a locking device (27) pushed by the flexible device to touch or leave the ratchet (50) on the front end surface of the body (5).
Description
Technical field
The drill holder of the utility model about using on a kind of electric tool, more particularly, about the drill chuck that uses on a kind of high-power impact class electric hand drill with auto-lock function.
Background technology
Existing drill chuck is all by the back cap, preceding cap, nut, body, jaw, door, bearer ring, the pearl frame, compositions such as steel ball, back cap and bearer ring are interference fitted on the body respectively, three jaws are installed in respectively in the inclined hole of three five equilibriums on the body, nut is installed in the nut groove of body, the threaded engagement of nut and jaw forms the screw thread transmission, preceding cap and nut interference fit, the front is mounted with door, rotate by the moving nut of hatband before the rotation during use, driving three jaws by the screw thread transmission seesaws in three inclined holes of body, three-jaw is opened or closure, reach the purpose of unclamping or clamping drilling tool.The weak point of above structure be drill chuck in the course of the work owing to vibrated or impacted, drilling tool skids easily or becomes flexible, and has a strong impact on operating efficiency, poor stability.
Summary of the invention
It is a kind of simple in structure that the purpose of this utility model is to provide, and has the drill chuck of auto-lock function.
The drill chuck that has auto-lock function in the utility model includes a body, cap before one, one back cap, one bearing assembly, three jaws, one door and a nut, fixedly connected with described back cap in the rear end of wherein said body, described three jaws are located in three set on described body inclined holes, described nut is located at the middle part of described body, fixedly connected with described preceding cap, simultaneously with the screw-threaded engagement of described three jaws, driving described jaw moves, be provided with a bearing assembly that described preceding cap is freely rotated before described between cap and the described body, the front end surface of described body is provided with ratchet, be provided with a limited cap between cap and the door before described, and described limited cap and described before be provided with an elastic device between the cap, described limited cap with described before can rotate an angle relatively between the cap, and can drive described elastic device itself or described elastic device promotion lock uint and replace or break away from the set ratchet of described body front end surface.
Be provided with at least one group of groove and projection that preceding cap and described limited cap are relatively moved before described between cap and the described limited cap, the width of wherein said groove is greater than the width of described projection.
Described groove is positioned on the lateral wall of described preceding cap, and described projection is positioned on the madial wall of described limited cap.
Described nut is two semi-circular structure that can form annulus.
Described ratchet is a triangular shaped ratchet.
The front end end face of cap is provided with one group of projection that is used for fixing described elastic device at least before described, described elastic device is a jump ring, one end of this jump ring can under released state and locking state, enter respectively described limited cap inwall set separate locked groove and locating slot, the ratchet of the other end of described jump ring can break away from respectively under released state and locking state and replace the set ratchet of described body surface.
Described every group of projection includes three bumping squares, and a gap that is used to fix described jump ring is arranged between two adjacent projections.
The front end end face of cap is provided with a groove at least before described, be provided with a straight pin in this inside grooves, be pivoted with a pulling block on this straight pin, one sidewall of described groove is provided with a blind hole, in this blind hole, be provided with an elastic device, this elastic device is a stage clip, and the end that described stage clip extends described blind hole is replaced an end of described pulling block all the time, and the other end of this pulling block can break away from or replace the ratchet of described body under the effect of described stage clip.
Described straight pin with described before cap integrally formed or fixedly connected by connector, or with the described preceding described cylinder pin hole interference fit of cap end face.
The outer circumference surface of described back cap, preceding cap, limited cap is equipped with uniform fin and groove.
When the drill chuck in the utility model is subjected to bigger shock loading at work, because the elastic device of cap or the ratchet engagement on lock uint and the body before being fixed on, has locking function, make and be difficult for rotating between nut and the body, thereby three not nut generation displacements relatively of jaw, drilling tool can not get loose, the security reliability when having improved drill chuck work greatly.
Description of drawings
Fig. 1 is the structural representation of drill chuck among the utility model embodiment one;
Fig. 2 is in cutaway view under the released state along the A-A line among Fig. 1;
Fig. 3 is in cutaway view under the locking state along the A-A line among Fig. 1;
Fig. 4 is the structural representation of drill chuck among the utility model embodiment two;
Fig. 5 is in cutaway view under the released state along the B-B line among Fig. 4;
Fig. 6 is in cutaway view under the locking state along the B-B line among Fig. 4.
The specific embodiment
The specific embodiment of the utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment one
As shown in Figure 1 to Figure 3, the drill chuck in the present embodiment includes a body 5, three jaws 6, nut 7, back cap 1, preceding cap 2, limited cap 3, door 4, jump ring 11 and bearing assemblies 8, wherein:
The edge circumferentially offers the hole of three inclinations equally spacedly in the body 5, a movably jaw 6 is installed in each inclined hole, be evenly equipped with asymmetric triangle ratchet 50 (also can other shape) on the fore end outer circumference surface of body 5, body 5 middle parts are equipped with a nut 7, this nut 7 is two halves formula structure (also can be a monolithic construction or the structure be made up of three parts even more parts), be meshing with each other by screw thread with three jaws 6, can drive three jaws 6 and move up and down, realize clamping and the purpose of unclamping the drill bit (not shown).
The rear end of body 5 adopts interference fit or other connected mode that one back cap 1 is installed.
Preceding cap 2 adopts interference fit with nut 7 or fixedlys connected with structures such as groove, fins, front end at preceding cap 2 is provided with two groups of (can be one or more groups) columnar projections 21, each group projection 21 includes three bumping squares, is provided with the gap 25 that is used to lay fixing spring (jump ring) 11 between the per two adjacent projections.Preceding cap 2 offers two (can be one or three) grooves 22 on the sidewall of its front end.
Be provided with limited caps 3 in the middle of preceding cap 2 and door 4, limited cap 3 is provided with two projectioies 31 in the position corresponding with groove 22, and the width of its further groove 22 is greater than the width of projection 31, make limited cap 3 can be relatively before cap rotate a certain angle.And groove 22 can be exchanged with projection 31, promptly on preceding cap projection is set, and on limited cap 3 groove is set.The surface within it of limited cap 3 is provided with two groups of corresponding with protruding 21 locked groove 32, locating slot 33 and grooves 34 separated.
The middle part of jump ring 11 fixes between the gap 25 of projection 21, one end is a positioning convex 110, the other end is a ratchet 112, by the position of relative rotary stopper cap 3 with preceding cap 2, the ratchet 112 that can suppress or unclamp jump ring 11 is meshing with each other with the ratchet 50 of body 5 or throws off, positioning convex 110 is entered separate locked groove 32 or locating slot 33, jump ring 11 is positioned, as shown in Figures 2 and 3.
Between the step at the rear end face of nut 7 and body 5 middle parts bearing assembly 8 is installed, this bearing assembly 8 includes bearer ring 80, pearl frame 81 and one group of steel ball 82, to guarantee being free to rotation between nut 7 and the body 5, because the structure that this nut 7 and bearing assembly are 8 is a prior art, no longer describes in detail at this.
Outer circumference surface at back cap 1, preceding cap 2, limited cap 3 is provided with uniform fin and groove in addition, increases aesthetic.
The course of work of drill chuck is as follows among this embodiment one:
At first the direction that limited cap 3 is unclamped drilling tool along preceding cap 2 rotates to the position of release, as shown in Figure 2, the ratchet 112 of jump ring 11 1 ends falls into the groove 34 of limited cap 3 at this moment, throws off with the ratchet 50 of body 5, and the positioning convex 110 of the other end enters separating in the locked groove 32 of limited cap 3.When needing to clamp drilling tool, cap 2 drives nut 7 rotations before the rotation, further driving jaw 6 moves, and clamping drill bit, after clamping drill bit, the angle that further equidirectional rotary stopper cap 3 is certain, the groove 34 that makes the ratchet 112 of jump ring 11 break away from limited caps 3 produces after the strains ratchet 50 engagements with body 5, the positioning convex 110 of the other end of jump ring 11 enters in the locating slot 33 of limited cap 3, prevents that limited cap 3 rotates and causes release in the vibration processes of work.During release, only need the certain angle of limited cap 3 opposite spins, the ratchet 112 of jump ring 11 is got back to again in the groove 34 of limited cap 3, and with ratchet 50 disengagings of body 5, cap 2 before the rotation unclamps drill bit then, finishes entire work process.
Embodiment two
Drill chuck in the present embodiment basic with the foregoing description one in identical, the parts that wherein have identical function and structure adopt same label to illustrate, and detailed description no longer separately.
Extremely shown in Figure 6 as Fig. 4, preceding cap 2 adopts interference fit to be connected with nut 7, it (can be one or three that the front end of preceding cap 2 is provided with two, even more) groove 23, in this groove 23, be provided with a straight pin 26, this straight pin 26 can be integrally formed with preceding cap 2, also can fixedly connected with the front end face of preceding cap 2 by connector, also can be located at before cap front end face circular hole interference fit.On this straight pin 26, be pivoted with a shifting block 27 (formation lock uint).One end face of groove 23 is provided with a blind hole 28, in this blind hole 28 stage clip 11 is housed, and the end that stage clip 11 extends blind hole 28 withstands an end of shifting block 27 all the time.The other end of pulling block 27 can mesh with the ratchet 50 of body 5 front end outer surfaces or break away under the promotion of stage clip 11.Between preceding cap 2 and the door 4 limited cap 3 is installed, two projectioies 31 of limited cap 3 match with two grooves 22 of preceding cap 2, limited cap 3 is rotated a certain angle, the end that pulling block 27 and stage clip are replaced enters or leaves the locating slot 33 of limited cap 3 under the reaction force of stage clip 11, ratchet 50 engagements or disengagement on the other end and the body 5, the purpose of realization self-locking.
Claims (10)
1, a kind of drill chuck with auto-lock function, include a body (5), cap (2) before one, one back cap (1), one bearing assembly (8), three jaws (6), one door (4) and a nut (7), fixedly connected with described back cap (1) in the rear end of wherein said body (5), described three jaws (6) are located in described body (5) and go up in three set inclined holes, described nut (7) is located at the middle part of described body (5), fixedly connected with described preceding cap (2), simultaneously with the screw-threaded engagement of described three jaws (6), driving described jaw (6) moves, be provided with a bearing assembly (8) that described preceding cap (2) is freely rotated before described between cap (2) and the described body (5), it is characterized in that: the front end surface of described body (5) is provided with ratchet (50), be provided with a limited cap (3) between cap (2) and the door (4) before described, and described limited cap (3) and described before be provided with an elastic device (11) between the cap (2), described limited cap (3) with described before can rotate an angle relatively between the cap (2), and can drive described elastic device (11) itself or replace or break away from the set ratchet (50) of described body (5) front end surface by elastic device promotion lock uint (27).
2, according to the drill chuck described in the claim 1 with auto-lock function, it is characterized in that: be provided with at least one group of groove (22) and projection (31) that preceding cap (2) and described limited cap (3) are relatively moved before described between cap (2) and the described limited cap (3), the width of wherein said groove (22) is greater than the width of described projection (31).
3, according to the drill chuck with auto-lock function described in the claim 2, it is characterized in that: described groove (22) is positioned on the lateral wall of described preceding cap (2), and described projection (31) is positioned on the madial wall of described limited cap (3).
4, according to the drill chuck with auto-lock function described in the claim 1, it is characterized in that: described nut (7) is two semi-circular structure that can form annulus.
5, according to the drill chuck with auto-lock function described in the claim 1, it is characterized in that: described ratchet (50) is triangular shaped ratchet.
6, according to any described drill chuck in the claim 1 to 5 with auto-lock function, it is characterized in that: the front end end face of cap (2) is provided with one group of projection (21) that is used for fixing described elastic device at least before described, described elastic device (11) is a jump ring, one end (110) of this jump ring can under released state and locking state, enter respectively described limited cap (3) inwall set separate locked groove (32) and locating slot (33), the ratchet of the other end of described jump ring (112) can break away from the ratchet (50) surperficial set with replacing described body (5) respectively under released state and locking state.
7, according to the drill chuck with auto-lock function described in the claim 6, it is characterized in that: described every group of projection (21) includes three bumping squares, and a gap (25) that is used to fix described jump ring (11) is arranged between two adjacent projections.
8, according to any described drill chuck in claim 1 or 5 with auto-lock function, it is characterized in that: the front end end face of cap (2) is provided with a groove (23) at least before described, be provided with a straight pin (26) in this groove (23) inside, be pivoted with a pulling block (27) on this straight pin (26), one sidewall of described groove (23) is provided with a blind hole (28), in this blind hole (28), be provided with an elastic device (11), this elastic device is a stage clip, the end that described stage clip extends described blind hole (28) is replaced an end of described pulling block (27) all the time, and the other end of this pulling block (27) can break away from or replace the ratchet (50) of described body (5) under the effect of described stage clip (11).
9, the drill chuck with auto-lock function described in according to Claim 8 is characterized in that: described straight pin (26) with described before cap (2) integrally formed or fixedly connected by connector, or with the described preceding described cylinder pin hole interference fit of cap (2) end face.
10, according to any described drill chuck with auto-lock function in the claim 1 to 5, it is characterized in that: the outer circumference surface of described back cap (1), preceding cap (2), limited cap (3) is equipped with uniform fin and groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720103296 CN200995285Y (en) | 2007-01-22 | 2007-01-22 | Drill gripping head with self-locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720103296 CN200995285Y (en) | 2007-01-22 | 2007-01-22 | Drill gripping head with self-locking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200995285Y true CN200995285Y (en) | 2007-12-26 |
Family
ID=38993708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720103296 Expired - Fee Related CN200995285Y (en) | 2007-01-22 | 2007-01-22 | Drill gripping head with self-locking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200995285Y (en) |
-
2007
- 2007-01-22 CN CN 200720103296 patent/CN200995285Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071226 Termination date: 20130122 |