CN1263574C - Self locking type key-free drill chuck - Google Patents
Self locking type key-free drill chuck Download PDFInfo
- Publication number
- CN1263574C CN1263574C CN 02119714 CN02119714A CN1263574C CN 1263574 C CN1263574 C CN 1263574C CN 02119714 CN02119714 CN 02119714 CN 02119714 A CN02119714 A CN 02119714A CN 1263574 C CN1263574 C CN 1263574C
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- Prior art keywords
- ring
- drill chuck
- self locking
- locking type
- circular arc
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- Expired - Fee Related
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Abstract
The present invention relates to a self locking type keyless drill chuck for tightly clamping a tool handle by an electric percussion drill, which comprises a rear cap, a main body, a bearing ring, a bearing assembly, a screw ring, a gripping jaw, a front cap, a baffle cover, etc., wherein the bearing assembly uses a ball bearing and is arranged between the screw ring and the bearing ring; an annular roll path which is in a circular arc shape and has the definite depth is arranged on the screw ring and on the face of a bearing roll path of the bearing ring; a plurality of ball-shaped pits are arranged on the arc face arranged on the bottom of the roll path which is in the circular arc shape; during the process that the tool handle is tightly clamped by the drill chuck, roll balls of the ball bearing enter the ball-shaped pits and are locked in the ball-shaped pits; therefore, tools are prevented from getting loose because of impact and vibrations.
Description
Technical field
The present invention relates to a kind of key-free drill chuck, particularly a kind of self locking type key-free drill chuck.Because the not only rotatable motion of electric percussion drill, and reciprocal impact shock, the present invention provides a kind of self locking type key-free drill chuck that can keep the reliable grip instrument under the impact shock effect especially.
Background technology
The various forms of key-free drill chucks of having produced both at home and abroad generally are made up of back cap, body, bearer ring, bearing, bung flange, jaw, preceding cap, door etc. at present.Jaw is flexible under in bung flange rotation and by the taper thread effect, and bung flange is by the moving rotation of preceding hatband.Current cap is during with manual rotation, and drill chuck is not for there being spoon.Drill chuck can be connected with the electric drill driving shaft by screw thread or taper hole.
Have the shortcoming of spoon or key-free drill chuck to be at present: the clamping of bung flange and jaw only forms by the rotation of screw thread, because the axial impact vibration of transmitting by drill chuck and instrument in the work, jaw has loosening trend.Make instrument produce skidding, have a strong impact on operating efficiency, poor stability.
Other has an existing chuck (for example: the Chinese patent notification number is the patented technology of CN1040732C).The chuck shock resistant technique of its introduction is to be shaped on radial groove in two component surface as raceway, and the relative edge of this groove is shaped on the fillet of different radii.Because the depth of groove is to the chuck impact resistance and unclamp chuck and have a significant impact.Groove is dark, can not unclamp chuck after the use; Groove is shallow, and impact resistance is poor.The depth that groove on all members is consistent, and then guarantee the impact resistance of all chucks, then when making member, need frequent adjustment equipment to guarantee the depth unanimity of all member grooves.This will influence production efficiency and cause defective products easily.Otherwise just need provide and have higher punching out precision or large-tonnage punching device more.This will increase manufacturing cost.
Summary of the invention
Purpose of the present invention overcomes above-mentioned the deficiencies in the prior art and defective exactly, and a kind of locking function that has is provided, and is safe in utilization, the self locking type key-free drill chuck that is used for percussion tool and is difficult for getting loose.
For achieving the above object, the present invention adopts following technical scheme.
A kind of self locking type key-free drill chuck that is used for the clamping tool handle, comprise back cap, body, bearer ring, bearing assembly, bung flange, jaw, preceding cap, door, at least bearer ring and bung flange the two one of on the face of bearing assembly, be shaped on recessed ring-type circular arc raceway, and on the cambered surface of the bottom of circular arc raceway, evenly be shaped on many spherical holes.
Also has a kind of self locking type key-free drill chuck that is used for the clamping tool handle, comprise back cap, body, upper bearing (metal) ring, bearing assembly, lower shaft carrier ring, bung flange, jaw, preceding cap, door, at least upper bearing (metal) ring and lower shaft carrier ring the two one of on the face of bearing assembly, be shaped on recessed ring-type circular arc raceway, and on the cambered surface of the bottom of circular arc raceway, evenly be shaped on many spherical holes.
The arc radius R of described recessed ring-type circular arc raceway is 1.5～2.5 millimeters.
The depth H of described recessed ring-type circular arc raceway is 0.05～0.30 millimeter.
The quantity in described spherical hole is 20～80.
The radius of a ball r in described spherical hole is 1.0～2.0 millimeters.
The degree of depth h in described spherical hole is 0.01～0.10 millimeter.
The apparent size of described upper bearing (metal) ring and lower shaft carrier ring and surface texture can be duplicate.
The bearer ring endoporus aperture of described upper bearing (metal) ring and lower shaft carrier ring is different with the thick size of ring.
In the course of the work, in the spin of bearing assembly enters the sphere hole of bearer ring or bung flange and is locked to.In perhaps the spin of bearing assembly enters the sphere hole of upper bearing (metal) ring or lower shaft carrier ring and is locked to.It is loosening to make that bung flange is difficult at work.Thereby make drill chuck keep very high clamping force.
Advantage of the present invention is that the depth in the sphere hole that plays a decisive role on the chuck impact resistance is guaranteed by mould.Promptly in die manufacture, the cambered surface optimum distance (depth) at the bottom of the recessed arc raceway of sphere hole distance is determined.In the punching out member process, irrelevant with the adjustment and the precision of equipment, this will make the depth in the sphere hole on all members remain at the optimum size scope, thereby guarantee the shock resistance of all chucks.
Another advantage of the present invention is, owing to adopted recessed circular arc raceway, make the ball of bearing assembly be constrained on all the time in the arc raceway, this will guarantee primary structure member to neutrality, and then guaranteed drill chuck three jaws stressed evenly, improved clamping force.
The present invention has overcome the deficiency that existing drill chuck does not have locking device or locking device poor performance owing to adopted said structure.It manipulates fast, reliable, safety, convenience, has advantages such as rational in infrastructure, easy to assembly, stable performance, reliable operation.Be suitable for all kinds of have spoon or key-free drill chucks.
Description of drawings
Fig. 1 is the front view of a kind of self locking type key-free drill chuck of the present invention;
Fig. 2 is the axial profilograph of one embodiment of the invention of Fig. 1;
Fig. 3 A is the front view of one embodiment of the invention bearer ring;
Fig. 3 B is the stereogram of one embodiment of the invention bearer ring;
Fig. 4 A is the front view of one embodiment of the invention bung flange;
Fig. 4 B is the stereogram of one embodiment of the invention bung flange;
Fig. 5 is a spherical hole structure partial amplification profile schematic diagram on the cambered surface at the bottom of the public together arc raceway of one embodiment of the invention bearer ring and bung flange, also is the amplification view along k-k among Fig. 3 A and Fig. 4 A;
Fig. 6 is the axial profilograph of another embodiment of the present invention of Fig. 1;
Fig. 7 A is the spin of the embodiment middle (center) bearing assembly partial enlarged drawing of (not self-locking state) outside sphere hole;
Fig. 7 B is the spin of the embodiment middle (center) bearing assembly partial enlarged drawing of (self-locking state) in sphere hole.
The specific embodiment
Further describe the specific embodiment of the present invention below in conjunction with drawings and Examples.
Fig. 1 is the key-free drill chuck outward appearance front view of making according to most preferred embodiment chuck structure of the present invention.
As shown in Figure 2, be the axial profilograph of an embodiment of a kind of self-locking drill chuck of the present invention, comprising: parts such as back cap 1, body 2, bearer ring 3, bearing assembly 4, bung flange 5, jaw 6, preceding cap 7, door 8.Pass between each parts is a prior art, does not describe in detail at this.
Referring to Fig. 3, Fig. 4, shown in Figure 5, on the roller surface of bearer ring 3, be shaped on the ring-type circular arc raceway 9 of certain depth, on the k-k cross section of ring-type circular arc raceway 9, the arc radius R of its circular arc is 2.0 millimeters, its depth H is 0.15 millimeter, and on the cambered surface of the bottom of circular arc raceway 9, be shaped on 40 spherical holes 10 in addition, and the radius of a ball r in spherical hole 10 is 1.5 millimeters, its degree of depth h is 0.05 millimeter.Simultaneously, on bung flange 5 surfaces, also be shaped on identical shaped ring-type circular arc raceway 9 and equal number, identical shaped sphere hole 10 as bearing assembly 4 another side raceways.In the work, as shown in Figure 7, along with bung flange 5 rotations, jaw clamping tool handle, the spherical hole 10 of spin discrepancy of bearing assembly 4, Fig. 7 A has shown the not self-locking state of spin outside the sphere hole of bearing assembly 4, it is final when bung flange 5 is anchored on the body 2, the spin of bearing assembly 4 enters or down in the sphere hole 10 in the raceway and be fixed, shown in Fig. 7 B, is the self-locking state of spin in the sphere hole of bearing assembly 4.The impact shock that transmits by chuck body 2 can not overcome the difference between the high and low energy state of bearing assembly 4 spin like this.Low-energy state is in the spherical hole corresponding to spin.According to the application-specific scope of drill chuck and the shock loading in the expectation work, can optimize and determine having spherical hole on bung flange 5 roller surfaces or on bearer ring 3 roller surfaces, or all have spherical hole on both faces, and the quantity in spherical hole and the degree of depth etc.
Referring to Fig. 6, be the axial profilograph of another embodiment of a kind of self-locking drill chuck of the present invention, comprising: parts such as back cap 1, body 2, upper bearing (metal) ring 31, bearing assembly 4, lower shaft carrier ring 32, bung flange 5, jaw 6, preceding cap 7, door 8.Its characteristics are: bung flange 5 is as the another side raceway of the spin of bearing assembly 4 among the use lower shaft carrier ring 32 alternative above-mentioned embodiment.Upper bearing (metal) ring 31 can have identical apparent size with lower shaft carrier ring 32, and at least the metal (upper ring the two one of on the face of bearing assembly 4, be shaped on described recessed ring-type circular arc raceway 9, and on the cambered surface of the bottom of circular arc raceway 9, be shaped on many spherical holes 10 in addition.Its operation principle is identical with an above-mentioned embodiment, repeats no more.
Claims (9)
1. self locking type key-free drill chuck that is used for the clamping tool handle, comprise back cap (1), body (2), bearer ring (3), bearing assembly (4), bung flange (5), jaw (6), preceding cap (7), door (8), it is characterized in that being, at least bearer ring (3) and bung flange (5) the two one of on the face of bearing assembly (4), be shaped on recessed ring-type circular arc raceway (9), and on the cambered surface of the bottom of circular arc raceway (9), evenly be shaped on many spherical holes (10).
2. self locking type key-free drill chuck that is used for the clamping tool handle, comprise back cap (1), body (2), upper bearing (metal) ring (31), bearing assembly (4), lower shaft carrier ring (32), bung flange (5), jaw (6), preceding cap (7), door (8), it is characterized in that being, at least upper bearing (metal) ring (31) and lower shaft carrier ring (32) the two one of on the face of bearing assembly (4), be shaped on recessed ring-type circular arc raceway (9), and on the cambered surface of the bottom of circular arc raceway (9), evenly be shaped on many spherical holes (10).
3. self locking type key-free drill chuck according to claim 1 and 2 is characterized in that, the arc radius R of described recessed ring-type circular arc raceway (9) is 1.5～2.5 millimeters.
4. self locking type key-free drill chuck according to claim 3 is characterized in that, the depth H of described recessed ring-type circular arc raceway (9) is 0.05～0.30 millimeter.
5. self locking type key-free drill chuck according to claim 1 and 2 is characterized in that, the quantity in described spherical hole (10) is 20～80.
6. self locking type key-free drill chuck according to claim 1 and 2 is characterized in that, the radius of a ball r in described spherical hole (10) is 1.0～2.0 millimeters.
7. self locking type key-free drill chuck according to claim 1 and 2 is characterized in that, the degree of depth h in described spherical hole (10) is 0.01～0.10 millimeter.
8. self locking type key-free drill chuck according to claim 2 is characterized in that, the apparent size and the surface texture of described upper bearing (metal) ring (31) and lower shaft carrier ring (32) are just the same.
9. self locking type key-free drill chuck according to claim 2 is characterized in that, the bearer ring endoporus aperture of described upper bearing (metal) ring (31) and lower shaft carrier ring (32) is different with the thick size of ring.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02119714 CN1263574C (en) | 2002-05-15 | 2002-05-15 | Self locking type key-free drill chuck |
| GB0422216A GB2402356B (en) | 2002-04-10 | 2002-08-09 | Self-tightening keyless chuck |
| US10/511,404 US7246801B2 (en) | 2002-04-10 | 2002-08-09 | Self-tightening keyless chuck |
| PCT/CN2002/000554 WO2003084700A1 (en) | 2002-04-10 | 2002-08-09 | A self-tightening keyless chuck |
| AU2002327276A AU2002327276A1 (en) | 2002-04-10 | 2002-08-09 | A self-tightening keyless chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02119714 CN1263574C (en) | 2002-05-15 | 2002-05-15 | Self locking type key-free drill chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1457949A CN1457949A (en) | 2003-11-26 |
| CN1263574C true CN1263574C (en) | 2006-07-12 |
Family
ID=29426861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02119714 Expired - Fee Related CN1263574C (en) | 2002-04-10 | 2002-05-15 | Self locking type key-free drill chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1263574C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012211907A1 (en) | 2012-07-09 | 2014-01-09 | Robert Bosch Gmbh | Rotary impact wrench with a striking mechanism |
-
2002
- 2002-05-15 CN CN 02119714 patent/CN1263574C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1457949A (en) | 2003-11-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060712 Termination date: 20130515 |