CN201086139Y - Drill chuck locking by expanding sleeve with hydraulic pressure - Google Patents
Drill chuck locking by expanding sleeve with hydraulic pressure Download PDFInfo
- Publication number
- CN201086139Y CN201086139Y CNU2007201846319U CN200720184631U CN201086139Y CN 201086139 Y CN201086139 Y CN 201086139Y CN U2007201846319 U CNU2007201846319 U CN U2007201846319U CN 200720184631 U CN200720184631 U CN 200720184631U CN 201086139 Y CN201086139 Y CN 201086139Y
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- CN
- China
- Prior art keywords
- sleeve
- drill body
- screw
- drill
- piston ring
- Prior art date
- 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 - Lifetime
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Abstract
The utility model discloses a drill clamp for locking based on hydraulic sleeve expansion. An axial hole is provided at the back end of a drill body and engaged with the driving shaft of a driver. Three clamping claws are arranged inside three equally-divided slant holes respectively in the drill body. Screws are engaged with the claws inside the slant holes of the drill body. Rollers are positioned between the drill body and the end surfaces of the screws. The screw sleeves are in interference fit with the screws. A front sleeve is fixedly connected with the screw sleeves as a whole body. A transmission sleeve and a rear sleeve are arranged at the back end of the drill body, wherein the transmission sleeve is in interference fit with the drill body and provided with a thread at the outer circumference thereof, and the rear sleeve is threadedly connected with the transmission sleeve and provided with a raised bench at the front end thereof. A hydraulic sleeve expansion locking device is arranged between the axial extension surface of the screw sleeve and the relevant outer circumference of the drill body. The rear sleeve moves vertically to control the hydraulic sleeve expansion locking device via the thread of the transmission sleeve. When clamping the drill head, the rear sleeve is rotated to push the piston to extrude the liquid plastics, so that the outer thin-wall sleeve expands axially to compress the inner wall of the screw sleeve, thereby locking the screw and the drill body. The utility model has self-locking function and avoids the looseness of the drill head under vibration or impact.
Description
Technical field
The utility model relates to clamping device, especially relates 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, the purpose of this utility model 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 adopted in the utility model 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 utlity model 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 utlity model has auto-lock function, drill chuck in use can or do 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 utility model is the clamping of suitable various tool also.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present utility model.
Fig. 2 is an A-A profile among Fig. 1.
Fig. 3 is the front view of the utility model 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 utility model.
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 utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, the utility model comprises that drill body 1 rear end is provided with the axial hole that engages with the driving shaft of driven tool, and 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.
During the utility model work, 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 |
|---|---|---|---|
| CNU2007201846319U CN201086139Y (en) | 2007-10-16 | 2007-10-16 | Drill chuck locking by expanding sleeve with hydraulic pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201846319U CN201086139Y (en) | 2007-10-16 | 2007-10-16 | Drill chuck locking by expanding sleeve with hydraulic pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201086139Y true CN201086139Y (en) | 2008-07-16 |
Family
ID=39633728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201846319U Expired - Lifetime CN201086139Y (en) | 2007-10-16 | 2007-10-16 | Drill chuck locking by expanding sleeve with hydraulic pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201086139Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493787C (en) * | 2007-10-16 | 2009-06-03 | 浙江大学 | Hydraulic expanding cover locking drill clamping head |
-
2007
- 2007-10-16 CN CNU2007201846319U patent/CN201086139Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493787C (en) * | 2007-10-16 | 2009-06-03 | 浙江大学 | Hydraulic expanding cover locking drill clamping head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071016 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |