CN100493787C - Hydraulic expanding cover locking drill clamping head - Google Patents
Hydraulic expanding cover locking drill clamping head Download PDFInfo
- Publication number
- CN100493787C CN100493787C CNB2007101561272A CN200710156127A CN100493787C CN 100493787 C CN100493787 C CN 100493787C CN B2007101561272 A CNB2007101561272 A CN B2007101561272A CN 200710156127 A CN200710156127 A CN 200710156127A CN 100493787 C CN100493787 C CN 100493787C
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- China
- Prior art keywords
- sleeve
- drill body
- screw
- hydraulic expanding
- screw nut
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- Expired - Fee Related
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Abstract
The hydraulic expanding sleeve locked drill chuck includes one chuck body with one axial hole for jointing the driving shaft, three clamping claws mounted inside the inclined holes in the chuck body, one screw nut meshed to the clamping claws, one rolling element between chuck body and the screw nut, one screw nut sleeve interference fitting the screw nut and one front sleeve fixed to the screw nut sleeve integrally. It has also one driving sleeve interference fitting the chuck body, one back sleeve screwed to the driving sleeve, one boss, and one hydraulic expanding sleeve unit set between the screw nut sleeve and the chuck body for locking. During clamping the drilling bit, the back sleeve is rotated to drive the piston to extrude liquid plastic, force the outer thin sleeve to expand toward the inner wall of the screw nut sleeve and lock the screw nut to the chuck body. The drill chuck has self locking function and no loosening caused by vibration and impact.
Description
Technical field
The present invention relates to clamping device, especially relate to a kind of drill chuck of hydraulic expanding cover locking.
Background technology
In the prior art, drill chuck generally is made up of drill body, jaw, screw, protheca, back cover etc., the back cover is connected with the drill body interference, three jaws are installed in three inclined holes of dividing equally of drill body, screw is installed in the screw groove of drill body, screw and jaw threaded engagement, protheca is connected with the screw tight fit or by key.During operation, rotate protheca with hand, drive the screw rotation, screw moves up and down jaw by the screw thread transmission, realizes the clamping of drill bit and unclamps.The deficiency of said structure is that in use, because vibration or impact, the self-locking performance of drill chuck just is difficult to satisfy the demand, and makes drill bit loosening easily, influences operating efficiency, poor stability.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, purpose of the present invention provides and prevents to become flexible, and is rational in infrastructure, and processing is simple, and is easy to assembly, the drill chuck of a kind of hydraulic expanding cover locking safe in utilization.
In order to achieve the above object, the technical solution used in the present invention is as follows:
Comprise drill body, three jaws, rolling element, screw and nut sleeves, the drill body rear end is provided with the axial hole that engages with the driving shaft of driven tool, three jaws are installed in respectively in the inclined hole of three five equilibriums in the drill body, screw and the jaw engagement that is installed in the drill body inclined hole, rolling element is between drill body and screw end face, nut sleeve and screw interference fit, protheca and nut sleeve are fixedly connected, and constitute whole with screw.The drill body rear end is provided with drive sleeve and back cover, drive sleeve and drill body interference fit, and the drive sleeve cylindrical is provided with screw thread, back cover and drive sleeve thread connection, front end is provided with boss; Nut sleeve extends axially to the back-end, extend axially between face and the corresponding drill body cylindrical at nut sleeve and to be provided with the hydraulic expanding cover locking device, hydraulic expanding cover locking device and drill body cylindrical are fixedly connected, and the back cover realizes moving up and down control hydraulic expanding cover locking device by the screw thread of drive sleeve.
The hydraulic expanding cover locking device comprises piston ring, spring, back-up ring, inner sleeve, expand thin walled cylinder body, liquid plastics outward, inner sleeve and drill body cylindrical interference fit, the inner sleeve rear end axially has cannelure, piston ring cooperates with cannelure, can move up and down, be provided with 8 holes at middle part, inner sleeve cylindrical side, radial equipartition communicates with cannelure; The outer thin walled cylinder body two ends barrel that expands is thick, and midfeather is thin; Piston ring, back-up ring, inner sleeve and the thin walled cylinder body that expands outward form an enclosed cavity, fill liquid plastics in the cavity; Be provided with spring between piston ring and the inner sleeve end face, the piston ring rear end face is corresponding with back cover boss, moves by back cover control piston ring.
The beneficial effect that the present invention has is:
The hydraulic expanding cover locking device is set between drill body and nut sleeve, when clamping drill bit, can be by rotation back cover, promote piston and push liquid plastics, because the liquid plastics medium is incompressible, forces outer thin walled cylinder body radially to swell, and is pressed on the nut sleeve inwall, thereby make screw and drill body sealed, guarantee that screw and jaw do not produce relative rotation when work.The present invention has auto-lock function, drill chuck in use can or not impacted because of vibration make drill bit loosening, have rational in infrastructure, advantage such as processing is simple, and is easy to assembly and safe in utilization, the present invention is the clamping of suitable various tool also.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present invention.
Fig. 2 is an A-A profile among Fig. 1.
Fig. 3 is the front view of the present invention when the work of clamping.
Fig. 4 is a B-B profile among Fig. 3.
Fig. 5 is a hydraulic expanding cover locking apparatus structure schematic diagram of the present invention.
Fig. 6 is a C-C profile among Fig. 5.
Among the figure: 1, drill body, 2, drive sleeve, 3, the back cover, 4, hydraulic expanding cover locking device, 5, rolling element, 6, nut sleeve, 7, screw, 8, protheca, 9, three jaws, 10, protecgulum, 4.1, piston ring, 4.2, spring, 4.3, back-up ring, 4.4, inner sleeve, 4.5, the thin walled cylinder body that expands outward, 4.6, liquid plastics.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, the present invention includes drill body 1 rear end and be provided with the axial hole that engages with the driving shaft of driven tool, three jaws 9 are installed in respectively in the inclined hole of three five equilibriums in the drill body, screw 7 and jaw 9 engagements that are installed in the drill body inclined hole; Nut sleeve 6 and screw 7 interference fit, the rear end extends axially, and protheca 8 is fixedly connected with nut sleeve 6, constitutes whole with screw 7; Rolling element 5 is between drill body 1 and screw 7 end faces; Drive sleeve 2 is positioned at drill body 1 rear end, and with drill body 1 interference fit, cylindrical is provided with screw thread, and back cover 3 connects with drive sleeve by screw thread, and front end is provided with annular boss; Hydraulic expanding cover locking device 3 is between drill body 1 periphery and nut sleeve 6 extended surfaces, by piston ring 4.1, spring 4.2, back-up ring 4.3, inner sleeve 4.4, expand thin walled cylinder body 4.5 and liquid plastics 4.6 formed outward, as Fig. 5, Fig. 6; The outer thin walled cylinder body two ends barrel that expands compares thick middle, has elasticity, form simultaneously and place the space that holds liquid, inner sleeve 4.4 rear ends radially are provided with cannelure, and piston ring 4.1 cooperates with cannelure, can move up and down, middle part, inner sleeve 4.4 cylindrical sides is provided with 8 holes, in order to be communicated with the space that cannelure and the outer thin walled cylinder body that expands form, piston ring 4.1, back-up ring 4.3, inner sleeve 4.4 and the thin walled cylinder body 4.5 that expands outward form an enclosed cavity, fill liquid plastics 4.6 in the cavity; Be provided with spring between piston ring 4.1 and inner sleeve 4.4 end faces, piston ring 4.1 rear end faces are corresponding with back cover 3 boss.
When the present invention works, rotate protheca 8 by hand, protheca 8 drives nut sleeve 6 and screw 7 rotates together, and screw 7 moves down jaw 9 by the screw thread transmission, clamps drill bit.Then, rotation back cover 3, back cover 3 is moved down, promote piston ring 4.1 and move extruding liquid plastics 4.6, because liquid plastics 4.6 is incompressible, force outer thin walled cylinder body 4.5 radially to swell, be pressed on nut sleeve 6 inwalls,, thereby guarantee that screw 7 and jaw 9 do not produce relative rotation when work as Fig. 3, Fig. 4, realize locking function, drill chuck is worked as a whole.When unclamping drill bit, overlap 3 after the first reverse rotation, back cover 3 is moved up, piston ring 4.1 moves up by 4.2 effects of compression spring, and hydraulic pressure plastics 4.6 pressures disappear, and sleeve 4.5 outer thin-walleds restore to the original state, separate with nut sleeve 6 inwalls, and as Fig. 1, Fig. 2.The reverse rotation protheca 8 then, drive nut sleeve 6 and screw 7 and rotate together, and jaw 9 is moved up, and realize that drill bit unclamps.
Claims (2)
1. the drill chuck of a hydraulic expanding cover locking, comprise drill body (1), three jaws (9), rolling element (5), screw (7) and nut sleeve (6), drill body (1) rear end is provided with the axial hole that engages with the driving shaft of driven tool, three jaws (9) are installed in respectively in the inclined hole of three five equilibriums in the drill body (1), screw (7) and jaw (9) engagement that is installed in the drill body inclined hole, rolling element (5) is positioned between drill body (1) and screw (7) end face, nut sleeve (6) and screw (7) interference fit, protheca (8) is fixedly connected with nut sleeve (6), constitutes whole with screw (7); It is characterized in that: the drill body rear end is provided with drive sleeve (2) and back cover (3), drive sleeve (2) and drill body (1) interference fit, and drive sleeve (2) cylindrical is provided with screw thread, back cover (3) and drive sleeve (2) thread connection, front end is provided with boss; Nut sleeve (6) extends axially to the back-end, extend axially between face and corresponding drill body (1) cylindrical at nut sleeve (6) and to be provided with hydraulic expanding cover locking device (4), hydraulic expanding cover locking device (4) is fixedly connected with drill body (1) cylindrical, and back cover (3) realizes moving up and down control hydraulic expanding cover locking device (4) by the screw thread of drive sleeve (2).
2. the drill chuck of a kind of hydraulic expanding cover locking according to claim 1, it is characterized in that: described hydraulic expanding cover locking device (4) comprises piston ring (4.1), spring (4.2), back-up ring (4.3), inner sleeve (4.4), expand thin walled cylinder body (4.5), liquid plastics (4.6) outward, inner sleeve (4.4) and drill body cylindrical interference fit, inner sleeve (4.4) rear end axially has cannelure, piston ring (4.1) cooperates with cannelure, can move up and down, be provided with 8 holes at middle part, inner sleeve (4.4) cylindrical side, radial equipartition communicates with cannelure; Outer thin walled cylinder body (4.5) the two ends barrel that expands is thick, and midfeather is thin; Piston ring (4.1), back-up ring (4.3), inner sleeve (4.4) and the outer thin walled cylinder body (4.5) that expands form an enclosed cavity, fill liquid plastics (4.6) in the cavity; Be provided with spring (4.2) between piston ring (4.1) and inner sleeve (4.4) end face, piston ring (4.1) rear end face is corresponding with back cover (3) boss, moves by back cover (3) control piston ring (4.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101561272A CN100493787C (en) | 2007-10-16 | 2007-10-16 | Hydraulic expanding cover locking drill clamping head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101561272A CN100493787C (en) | 2007-10-16 | 2007-10-16 | Hydraulic expanding cover locking drill clamping head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101147983A CN101147983A (en) | 2008-03-26 |
| CN100493787C true CN100493787C (en) | 2009-06-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101561272A Expired - Fee Related CN100493787C (en) | 2007-10-16 | 2007-10-16 | Hydraulic expanding cover locking drill clamping head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100493787C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818285A (en) * | 2019-01-30 | 2019-05-28 | 国网浙江杭州市富阳区供电有限公司 | A kind of electrically operated device for handcart switch cabinet |
| CN112170905B (en) * | 2019-07-01 | 2021-12-03 | 浙江三鸥机械股份有限公司 | Boosting drill chuck |
| CN112191895B (en) * | 2019-07-08 | 2021-11-26 | 浙江三鸥机械股份有限公司 | Automatic clamping centering drill chuck |
| CN113636093B (en) * | 2021-10-14 | 2021-12-14 | 江苏九设机器人科技有限公司 | Unmanned aerial vehicle monitoring device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803399A (en) * | 1996-11-27 | 1998-09-08 | Japan Development Consultants, Inc. | Expandable shaft |
| CN1344191A (en) * | 1999-03-30 | 2002-04-10 | 桑德维克公司 | Hydraulic chuck with deformable gripping sleeve |
| DE10115864C1 (en) * | 2001-03-30 | 2002-10-10 | Festo Ag & Co | Fluid-operated device, used in boring and cutting machines, comprises sleeve-like spring chuck, annular or ring-like impinging body, and operating units containing fluid-operated contraction unit |
| CN2605091Y (en) * | 2003-03-12 | 2004-03-03 | 李新平 | Improved closefisted drill chuck jacket |
| CN2832370Y (en) * | 2005-09-30 | 2006-11-01 | 浙江三鸥机械股份有限公司 | Energizing type clamping head |
| CN1942275A (en) * | 2004-04-06 | 2007-04-04 | 雄克有限公司 | Expansion chucking device |
| DE102006007817A1 (en) * | 2006-02-17 | 2007-08-30 | Reishauer Ag | Device for play-free rotary drive of workpiece clamped between centering points in processing machine has annular pressure chamber concentric to rotation axis that acts on clamping lobes of clamping jaws by radial expansion |
| CN201086139Y (en) * | 2007-10-16 | 2008-07-16 | 浙江大学 | Drill chuck locking by expanding sleeve with hydraulic pressure |
-
2007
- 2007-10-16 CN CNB2007101561272A patent/CN100493787C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803399A (en) * | 1996-11-27 | 1998-09-08 | Japan Development Consultants, Inc. | Expandable shaft |
| CN1344191A (en) * | 1999-03-30 | 2002-04-10 | 桑德维克公司 | Hydraulic chuck with deformable gripping sleeve |
| DE10115864C1 (en) * | 2001-03-30 | 2002-10-10 | Festo Ag & Co | Fluid-operated device, used in boring and cutting machines, comprises sleeve-like spring chuck, annular or ring-like impinging body, and operating units containing fluid-operated contraction unit |
| CN2605091Y (en) * | 2003-03-12 | 2004-03-03 | 李新平 | Improved closefisted drill chuck jacket |
| CN1942275A (en) * | 2004-04-06 | 2007-04-04 | 雄克有限公司 | Expansion chucking device |
| CN2832370Y (en) * | 2005-09-30 | 2006-11-01 | 浙江三鸥机械股份有限公司 | Energizing type clamping head |
| DE102006007817A1 (en) * | 2006-02-17 | 2007-08-30 | Reishauer Ag | Device for play-free rotary drive of workpiece clamped between centering points in processing machine has annular pressure chamber concentric to rotation axis that acts on clamping lobes of clamping jaws by radial expansion |
| CN201086139Y (en) * | 2007-10-16 | 2008-07-16 | 浙江大学 | Drill chuck locking by expanding sleeve with hydraulic pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101147983A (en) | 2008-03-26 |
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Granted publication date: 20090603 Termination date: 20141016 |
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