CN112453454A - Open type three-jaw self-centering chuck - Google Patents
Open type three-jaw self-centering chuck Download PDFInfo
- Publication number
- CN112453454A CN112453454A CN202011453461.6A CN202011453461A CN112453454A CN 112453454 A CN112453454 A CN 112453454A CN 202011453461 A CN202011453461 A CN 202011453461A CN 112453454 A CN112453454 A CN 112453454A
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- China
- Prior art keywords
- chuck
- jaw
- gear
- driving
- driving screw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
Abstract
The invention relates to an open type three-jaw self-centering chuck, wherein a lower chuck base and an upper chuck base are assembled together, a through hole is arranged in the middle of the chuck base, annular grooves are arranged on the disc surfaces of the lower chuck base and the upper chuck base, and the circles of the annular grooves and the through hole are concentric; the clamping jaw driving screw assembly and the clamping jaw components are arranged at the 120-degree interval of the circumference of the annular groove towards the circle center direction, the driving gear and the driven gear components are further arranged in the annular groove, the driving gear, the driven gear components and the gears at the tail ends of the driving screw assemblies are meshed with each other to form a motion relation, and the driving gear is further provided with a driving device outside the side face of the lower base of the chuck. The three-jaw chuck has the advantages of self-centering, light weight, large clamping force, difficulty in falling off, realization of large stroke, convenience in clamping long-shaft parts, capability of reaching 400 newtons through testing, realization of large stroke exceeding 60mm through clamping and loosening of the jaw assembly, and suitability for shaft parts with various shaft diameters.
Description
Technical Field
The invention relates to a tool for a machine tool, in particular to an open type three-jaw self-centering chuck.
Background
Application number 201920498392.7 relates to a three-jaw is from centering chuck, drives chuck dish silk through the bevel gear and rotates, and then drives the sliding seat and slide in the radial spout on the shell, realizes the motion of feeling relieved from the centering of jack catch.
The technique is consistent with the traditional end face thread clamping and centering.
Application number 201921267066.1 discloses a three-jaw structure of a three-jaw chuck, aiming at providing a three-jaw structure for clamping a square workpiece, which is convenient to clamp and improves the processing efficiency.
The mechanism realizes clamping of square workpieces, but the thickness of the product is thick, and meanwhile, the clamping force is not large.
Disclosure of Invention
The invention provides an open type three-jaw self-centering chuck, aiming at realizing self-centering, light weight, large clamping force, difficult falling, large stroke and convenient clamping of long shaft parts of a three-jaw chuck.
The technical scheme of the invention is that the open type three-jaw self-centering chuck comprises a lower chuck base and an upper chuck base, wherein the lower chuck base and the upper chuck base are assembled together, a through hole is arranged in the middle of the lower chuck base and the upper chuck base, annular grooves are arranged on the disc surfaces of the lower chuck base and the upper chuck base, and the annular grooves are concentric with the circle of the through hole;
a first guide groove, a second guide groove and a third guide groove are arranged at 120-degree intervals of the circumference of the annular groove in the direction of the circle center, a first clamping jaw driving screw assembly, a second clamping jaw driving screw assembly and a third clamping jaw driving screw assembly are respectively arranged in the first guide groove, the second guide groove and the third guide groove, clamping jaw components are arranged at the front ends of the first clamping jaw driving screw assembly, the second clamping jaw driving screw assembly and the third clamping jaw driving screw assembly, and the clamping jaw components are driven to reciprocate in the direction of the circle center along the first guide groove, the second guide groove and the third guide groove, so that the clamping and loosening functions of the clamping jaw components are realized;
the driving gear and the driven gear assemblies are arranged in the annular groove, the driving gear, the driven gear assemblies and the tail end gear of the driving screw assembly are meshed with each other to form a motion relation, the driving gear drives the driven gear assemblies to drive the first clamping jaw, the second clamping jaw and the third clamping jaw to drive the screw assembly to move, and clamping and loosening of the clamping jaw assemblies are finally achieved; wherein, the driving gear is arranged outside the chuck and is also provided with a driving device on the side surface of the lower base of the chuck.
The further improvement lies in that: the driving gear, the plurality of driven gear assemblies and the tail end gear of the driving screw assembly are umbrella-shaped gears.
The further improvement lies in that: the number of the driven gear components between the driving gear and the tail end gear of the driving screw assembly is singular or even.
The further improvement lies in that: the driven gear assembly further comprises a central shaft, a driven gear is arranged outside the diameter of the central shaft through a needle bearing, a plane bearing is further arranged outside the driven gear of the central shaft, and the driven gear moves in the annular groove in a circular mode through the central shaft.
The further improvement lies in that: the driving gear is also externally provided with a plane bearing.
The further improvement lies in that: the first, second and third jaw driving screw assemblies comprise tail end gears of the driving screw assemblies, and the tail end gears of the driving screw assemblies are also provided with screws which are in threaded connection with the jaw components.
The further improvement lies in that: the driving device is driven by hydraulic pressure, a motor or a wrench.
The further improvement lies in that: the open type three-jaw self-centering chuck is closed.
Has the advantages that:
the three-jaw chuck has the advantages of self-centering, light weight, large clamping force, difficulty in falling, realization of large stroke, convenience in clamping long-shaft parts, realization of self-centering of a clamping workpiece due to the fact that the annular groove and the through hole are concentric, ultrathin and light weight due to the fact that the bevel gears are assembled in the annular groove, and large clamping force and tightness due to the fact that the bevel gears are applied and limited by the modulus of the bevel gears and the friction force of a plurality of tooth surfaces, the stroke of the clamping jaw assembly is larger than 60mm due to the fact that the clamping force is large and tight and can reach 400 newtons through testing, and the stroke of the clamping jaw assembly is larger than 60mm due to the fact that a screw of a driving screw assembly drives the clamping jaw assembly to clamp and.
The driven gear assemblies are odd or even, and the purpose of limiting the jaw assemblies to advance or retreat simultaneously is to realize synchronous movement.
The planar bearing is convenient to implement and adjust the gap of the bevel gear, the mutual rotating gap of the bevel gear can be zero through the axial adjustment of the bevel gear, the moving precision of the jaw assembly can be adjusted, zero error is realized, and the planar bearing is particularly suitable for application of high-precision machine tools.
The driving device is driven by hydraulic pressure or a motor and a wrench, and provides multiple reselections.
The three-jaw self-centering chuck is of an open type or a closed type, wherein the open type is convenient for clamping long-axis parts, and the closed type is suitable for clamping disc surface parts.
Drawings
Fig. 1 is a front external view of the present invention.
Fig. 2 is a sectional view taken along line B-B of fig. 1.
Fig. 3 is an external view of fig. 2.
Fig. 4 is a right side view of fig. 1.
Fig. 5 is a sectional view taken along line a-a of fig. 4.
Fig. 6 is an external view of the driven gear assembly.
FIG. 7 is a cross-sectional view of the driven gear assembly taken along line C-C.
FIG. 8 is an assembled profile view of the tail end gear and screw of the jaw drive screw assembly.
Fig. 9 is an external view of the assembled drive device and drive gear.
Fig. 10 is a right side view of fig. 9.
Fig. 11 is a general assembly profile of the present invention.
In the figure, 1 is a lower base of a chuck, 2 is a through hole, 3 is an annular groove, 4 is an upper base of the chuck, 5 is a first guide groove, 6 is a second guide groove, 7 is a third guide groove, 8 is a first jaw driving screw assembly, 9 is a second jaw driving screw assembly, 10 is a third jaw driving screw assembly, 11 is a jaw assembly, 12 is a driving gear, 13 is a driven gear assembly, 14 is a tail end gear of the driving screw assembly, 15 is a driving device, and 16 is a screw;
Detailed Description
The present invention is illustrated in fig. 1-11.
The embodiment of the product is as follows:
an open type three-jaw self-centering chuck comprises a chuck lower base 1 and a chuck upper base 4, wherein the chuck lower base 1 and the chuck upper base 4 are combined together, a through hole 2 is formed in the middle of the chuck lower base 1 and the chuck upper base 4, an annular groove 3 is formed in the disc surface of the chuck lower base 1 and the chuck upper base 4, and the annular groove 3 and the circle of the through hole 2 are concentric;
a first guide groove 5, a second guide groove 5, a third guide groove 6 and a third guide groove 7 are arranged at 120-degree intervals of the circumference of the annular groove 3 in the direction of the circle center, a first clamping jaw driving screw assembly 8, a second clamping jaw driving screw assembly 9 and a third clamping jaw driving screw assembly 10 are respectively arranged in the first guide groove 5, the second guide groove 5, the third guide groove 6 and the third guide groove 7, a clamping jaw assembly 11 is arranged at the front ends of the first clamping jaw driving screw assembly 8, the second clamping jaw driving screw assembly 9 and the third clamping jaw driving screw assembly 10, and the first clamping jaw driving screw assembly 11, the second clamping jaw driving screw assembly and the third clamping jaw driving screw assembly 8, 9 and 10 drive the clamping jaw assembly 11 to reciprocate in the direction of the circle center along the first guide groove 5, the second guide groove 5, the third guide groove 6 and;
a driving gear 12 and a plurality of driven gear assemblies 13 are further arranged in the annular groove 3, the driving gear 12, the driven gear assemblies 13 and a tail end gear 14 of the driving screw assembly are meshed with each other to form a movement relation, the driving gear 12 drives the plurality of driven gear assemblies 13 to drive the first, second and third jaw driving screw assemblies 8, 9 and 10 to move, and clamping and loosening of the jaw assemblies 11 are finally achieved; wherein the driving gear 12 is also provided with a driving device 15 outside the side surface of the lower base 1 of the chuck.
The driving gear 12, the plurality of driven gear assemblies 13 and the tail end gear 14 of the driving screw assembly are bevel gears.
The number of the driven gear assembly 13 between the driving gear 12 and the tail gear 14 of the driving screw assembly is singular or even.
The driven gear assembly 13 further includes a central shaft 131, a driven gear 133 is disposed outside the shaft diameter of the central shaft 131 through a needle bearing 132, wherein the central shaft 131 is further provided with a plane bearing 134 outside the driven gear 133, and the driven gear 133 moves circularly through the central shaft 131 in the annular groove 3.
A flat bearing 134 is also provided outside the drive gear 12.
The first, second and third jaw driving screw assemblies 8, 9 and 10 comprise a driving screw assembly tail end gear 14, the driving screw assembly tail end gear 14 is also provided with a screw 16, and the screw 16 is in threaded connection with the jaw component 11.
The driving device 15 is driven by hydraulic pressure, a motor or a wrench.
The open type three-jaw self-centering chuck is closed.
Claims (8)
1. An open type three-jaw self-centering chuck comprises a chuck lower base (1) and a chuck upper base (4), wherein the chuck lower base (1) and the chuck upper base (4) are combined together, a through hole (2) is formed in the middle of the chuck lower base (1) and the chuck upper base (4), an annular groove (3) is formed in the disc surface of the chuck lower base (1) and the chuck upper base (4), and circles of the annular groove (3) and the through hole (2) are concentric;
a first guide groove, a second guide groove and a third guide groove (5, 6 and 7) are arranged at 120-degree intervals of the circumference of the annular groove (3) in the direction of the circle center, a first clamping claw driving screw assembly, a second clamping claw driving screw assembly and a third clamping claw driving screw assembly (8, 9 and 10) are respectively arranged in the first guide groove, the second guide groove and the third guide groove (5, 6 and 7), clamping claw components (11) are arranged at the front ends of the first clamping claw driving screw assembly, the second clamping claw driving screw assembly and the third clamping claw driving screw assembly (8, 9 and 10), and the clamping claw components (11) are driven to reciprocate in the direction of the circle center along the first guide groove, the second guide groove and the third guide groove (5, 6 and 7), so that the clamping and loosening functions of the clamping claw components (11) are realized;
a driving gear (12) and a plurality of driven gear assemblies (13) are further arranged in the annular groove (3), the driving gear (12), the driven gear assemblies (13) and a tail end gear (14) of the driving screw assembly are meshed with each other to form a motion relation, the driving gear (12) drives the plurality of driven gear assemblies (13) to drive the first, second and third jaw driving screw assemblies (8, 9 and 10) to move, and clamping and loosening of the jaw assemblies (11) are finally achieved; wherein, the driving gear (12) is also provided with a driving device (15) outside the side surface of the lower base (1) of the chuck.
2. The open-ended three-jaw self-centering chuck of claim 1, wherein: the driving gear (12), the plurality of driven gear assemblies (13) and the tail end gear (14) of the driving screw assembly are bevel gears or bevel gears.
3. An open three-jaw self-centering chuck according to claim 1 or 2, wherein: the number of the driven gear components (13) between the driving gear (12) and the tail end gear (14) of the driving screw assembly is singular or even.
4. The open-ended three-jaw self-centering chuck of claim 3, wherein: the driven gear assembly (13) further comprises a central shaft (131), a driven gear (133) is arranged outside the shaft diameter of the central shaft (131) through a needle bearing (132), a plane bearing (134) is further arranged outside the driven gear (133) of the central shaft (131), and the driven gear (133) moves circularly through the central shaft (131) in the annular groove (3).
5. The open-ended three-jaw self-centering chuck of claim 2, wherein: a plane bearing (134) is also arranged outside the driving gear (12).
6. The open-ended three-jaw self-centering chuck of claim 1, wherein: the first, second and third jaw driving screw assemblies (8, 9 and 10) comprise a driving screw assembly tail end gear (14), the driving screw assembly tail end gear (14) is further provided with a screw (16), and the screw (16) is in threaded connection with the jaw component (11).
7. The open-ended three-jaw self-centering chuck of claim 1, wherein: the driving device (15) is driven by hydraulic pressure, a motor or a hand wrench.
8. The open-ended three-jaw self-centering chuck of claim 1, wherein: the open type three-jaw self-centering chuck is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011453461.6A CN112453454A (en) | 2020-12-12 | 2020-12-12 | Open type three-jaw self-centering chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011453461.6A CN112453454A (en) | 2020-12-12 | 2020-12-12 | Open type three-jaw self-centering chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112453454A true CN112453454A (en) | 2021-03-09 |
Family
ID=74801446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011453461.6A Pending CN112453454A (en) | 2020-12-12 | 2020-12-12 | Open type three-jaw self-centering chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112453454A (en) |
-
2020
- 2020-12-12 CN CN202011453461.6A patent/CN112453454A/en active Pending
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