CN114505511B - Four-jaw synchronous self-centering lathe chuck - Google Patents
Four-jaw synchronous self-centering lathe chuck Download PDFInfo
- Publication number
- CN114505511B CN114505511B CN202210328296.4A CN202210328296A CN114505511B CN 114505511 B CN114505511 B CN 114505511B CN 202210328296 A CN202210328296 A CN 202210328296A CN 114505511 B CN114505511 B CN 114505511B
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- CN
- China
- Prior art keywords
- jaw
- frame body
- shaft pin
- tensioning assembly
- push rod
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Classifications
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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
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/16195—Jaws movement actuated by levers moved by a coaxial control rod
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/30—Chucks with four jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/32—Guideways for jaws
Abstract
The invention discloses a four-jaw synchronous self-centering lathe chuck which comprises a disc body, a guide push rod, clamping jaws and a synchronous transmission mechanism, wherein the disc body comprises a frame body which is in a regular octagon shape, the guide push rod vertically penetrates through four side edges of the frame body and can radially move relative to the frame body, the clamping jaws comprise moving parts which vertically penetrate through the other four side edges of the frame body and can radially move relative to the frame body, and clamping jaw parts which are vertically arranged with the moving parts, wherein the clamping jaws and the guide push rod are in circumference alternate arrangement, the synchronous transmission mechanism is connected with the guide push rod and the clamping jaws, when any one of the guide push rods radially moves relative to the frame body, the synchronous transmission mechanism drives the clamping jaws to synchronously move away from or approach to each other.
Description
Technical Field
The invention relates to the technical field of lathe clamps, in particular to a four-jaw synchronous self-centering lathe chuck.
Background
The chuck is a mechanical device for clamping a workpiece on a machine tool, and mainly utilizes radial movement of movable claws uniformly distributed on a chuck body to realize workpiece clamping and positioning.
The common four-jaw chuck is a four-jaw single-action chuck and consists of a disc body, four screw rods and a pair of jaws, and the four screw rods are used for driving the four jaws respectively during working, so that the four-jaw chuck does not have an automatic centering function. Moreover, because only one integral claw structure defect exists, the four-claw chuck is generally only suitable for clamping eccentric parts and irregularly-shaped parts, and the accurate centering of the axle center and the geometric center of the parts cannot be realized for clamping axles, discs and square parts.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above and/or problems occurring in the prior art chucks.
Therefore, the invention aims to provide the four-jaw synchronous self-centering lathe chuck, which can realize synchronous self-centering of four jaws, expands the application range to the condition that geometric centers and turning shafts of shafts, discs, square parts and the like are required to be precisely centered, and greatly expands the application range.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
a four-jaw synchronized self-centering lathe chuck, comprising:
the tray body comprises a frame body in a regular octagon shape;
the guide push rod vertically penetrates through four side edges of the frame body and can radially move relative to the frame body;
the clamping claw comprises a moving part which vertically penetrates through the other four side edges of the frame body and can radially move relative to the frame body and a claw part which is vertically arranged with the moving part, wherein the clamping claw and the guide push rod are alternately arranged in circumference;
and the synchronous transmission mechanism is connected with the guide push rod and the clamping jaw, and drives the clamping jaw to synchronously move away from or approach to each other when any one of the guide push rods moves radially relative to the frame body.
As a preferable scheme of the four-jaw synchronous self-centering lathe chuck, the synchronous transmission mechanism comprises a first tensioning assembly and a second tensioning assembly which are alternately hinged in sequence and are enclosed and closed, wherein the first tensioning assemblies are connected with guide push rods in one-to-one correspondence, and the second tensioning assemblies are connected with moving parts of jaws in one-to-one correspondence;
when any one of the guide push rods moves radially relative to the frame body, the first tensioning assembly expands/tightens, the second tensioning assembly synchronously tightens/expands along with the first tensioning assembly, and the clamping jaws are driven to synchronously move away from/approach.
As a preferable scheme of the four-jaw synchronous self-centering lathe chuck, the chuck body further comprises a flange end cover for sealing the top of the frame body and a jaw end cover for sealing the bottom of the frame body, and sliding grooves distributed in a cross shape are formed in the bottom of the jaw end cover for moving the jaw.
As a preferred scheme of the four-jaw synchronous self-centering lathe chuck, the invention is characterized in that the first tensioning assembly is in a parallelogram shape and comprises two first movable blocks, one end of which is hinged through a first shaft pin, and two second movable blocks, one end of which is hinged through a second shaft pin;
the other end part of one second movable block is hinged with the other end part of one first movable block through a third shaft pin, and the other end part of the other second movable block is hinged with the other end part of the other first movable block through a fourth shaft pin.
As a preferred scheme of the four-jaw synchronous self-centering lathe chuck, the second tensioning assembly is in a parallelogram shape and comprises two third movable blocks, one end parts of the third movable blocks are hinged with the second movable blocks of the adjacent first tensioning assembly through second shaft pins, and one end parts of the fourth movable blocks are hinged with the first movable blocks of the adjacent first tensioning assembly through first shaft pins;
the other end part of one fourth movable block is hinged with the other end part of one third movable block through a fifth shaft pin, and the other end part of the other fourth movable block is hinged with the other end part of the other third movable block through a sixth shaft pin.
As a preferable scheme of the four-jaw synchronous self-centering lathe chuck, a first guide groove is formed in the top of the guide push rod, the top of a third shaft pin of the first tensioning assembly is vertically fixed with the end part of the corresponding guide push rod, and a fourth shaft pin correspondingly extends into the first guide groove of the guide push rod.
As a preferable scheme of the four-jaw synchronous self-centering lathe chuck, a second guide groove is formed in the top of the moving part of the jaw, the top of a fifth shaft pin of the second tensioning assembly is fixed with the bottom of the corresponding moving part, and a sixth shaft pin correspondingly extends into the second guide groove of the moving part.
As a preferable scheme of the four-jaw synchronous self-centering lathe chuck, one of the guide push rods is provided with a rotatable threaded rotating shaft, and the side wall, connected with the guide push rod, of the frame body is provided with a threaded cylinder meshed with the threaded rotating shaft.
As a preferable scheme of the four-jaw synchronous self-centering lathe chuck, a polygonal slot or a regular polygonal bolt head structure is formed at the end part of the threaded cylinder.
As a preferable scheme of the four-jaw synchronous self-centering lathe chuck, the top of the flange end cover is provided with a flange plate.
Compared with the prior art, the invention has the following beneficial effects: according to the four-jaw synchronous self-centering lathe chuck, the guide push rod is driven to move, a series of synchronous motions of the synchronous transmission mechanism can be used for driving the four jaws to synchronously move to center and clamp an object, the four jaws are synchronously self-centering, the application range is expanded to the condition that geometric centers of shafts, discs, square parts and the like are needed to be precisely centered with a turning shaft, and the application range is greatly expanded.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present invention, and from which other drawings can be obtained by those skilled in the art without inventive faculty. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a four-jaw synchronous self-centering lathe chuck in one direction;
FIG. 2 is a schematic view of the overall structure of the four-jaw synchronous self-centering lathe chuck in another direction;
FIG. 3 is a schematic structural view of a four-jaw synchronous self-centering lathe chuck for removing a flange end cover;
FIG. 4 is a schematic diagram of the structure of the jaws of a four-jaw synchronous self-centering lathe chuck of the present invention;
fig. 5 is a schematic structural diagram of a synchronous transmission mechanism of a four-jaw synchronous self-centering lathe chuck.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings.
Next, the present invention will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The invention provides a four-jaw synchronous self-centering lathe chuck, which can realize synchronous self-centering of four jaws, expands the application range to the condition that geometric centers of shafts, discs, square parts and the like are required to be precisely centered with a turning shaft, and greatly expands the application range.
Fig. 1 to 5 are schematic structural views showing an embodiment of a four-jaw synchronous self-centering lathe chuck according to the present invention, referring to fig. 1 to 5, a four-jaw synchronous self-centering lathe chuck according to the present embodiment has a main body portion including a disc body 100, a guide push rod 200, a jaw 300 and a synchronous transmission mechanism 400.
The disc body 100 comprises a frame body 110 which is in a regular octagon shape, a flange end cover 120 for sealing the top of the frame body 110 and a claw hand end cover 130 for sealing the bottom of the frame body 110, wherein a chute 130a which is in cross-shaped distribution and is used for allowing the claw hand 320 to move is formed in the bottom of the claw hand end cover 130, a flange 120a is arranged at the top of the flange end cover 120, the flange 120a can be conveniently detached from a lathe turning spindle, and the whole lathe chuck can be guaranteed to synchronously rotate with the lathe turning spindle.
The guide push rods 200 vertically penetrate through four sides of the frame 110 and can radially move relative to the frame 110, and serve as driving and positioning components for driving the synchronous transmission mechanism 400 to drive the clamping jaws 300 to synchronously move and lock, a rotatable threaded rotating shaft 210 is arranged on one guide push rod 200, a threaded cylinder 110a meshed with the threaded rotating shaft 210 is arranged on the side wall, connected with the guide push rod 200, of the frame 110, the guide push rod 200 is radially moved by rotating the threaded rotating shaft 210, and further the synchronous transmission mechanism 400 is driven to act, preferably, in the embodiment, a polygonal slot 220a or a regular polygonal bolt head structure is formed at the end part of the threaded cylinder 110a, and the threaded rotating shaft 210 can be rotated by inserting a polygonal wrench into the slot 220a or sleeved on the regular polygonal bolt head structure.
The clamping jaw 300 is used for centering and clamping a workpiece, specifically, the clamping jaw 300 comprises a moving part 310 vertically penetrating through the other four sides of the frame 110 and capable of radially moving relative to the frame 110, and a jaw part 320 vertically arranged with the moving part 310, wherein the clamping jaw 300 and the guide push rods 200 are circumferentially and alternately arranged, and when in use, the four guide push rods 200 drive the four clamping jaws 300 to synchronously approach or separate from each other to clamp or relax the workpiece by driving the synchronous transmission mechanism 400.
The synchronous transmission mechanism 400 is used as an intermediate transmission mechanism to receive the driving force of the guide push rod 200 and drive the clamping jaw 300 to synchronously move, specifically, the synchronous transmission mechanism 400 comprises a first tensioning assembly 410 and a second tensioning assembly 420 which are alternately hinged in sequence and surround and close, the first tensioning assemblies 410 are connected with the guide push rod 200 in a one-to-one correspondence manner, the second tensioning assemblies 420 are connected with the moving parts 310 of the clamping jaw 300 in a one-to-one correspondence manner, when any one of the guide push rods 200 radially moves relative to the frame 110, the first tensioning assemblies 410 expand/tighten, the second tensioning assemblies 420 synchronously tighten/expand along with the first tensioning assemblies 410, and the clamping jaw 300 is driven to synchronously move away/approach.
More specifically, the first tension assembly 410 has a parallelogram shape including two first movable blocks 410a having one end portion hinged by a first shaft pin H and two second movable blocks 410b having one end portion hinged by a second shaft pin L, wherein the other end portion of one second movable block 410b is hinged to the other end portion of one first movable block 410a by a third shaft pin M, the other end portion of the other second movable block 410b is hinged to the other end portion of the other first movable block 410a by a fourth shaft pin N, the second tension assembly 420 has a parallelogram shape including two third movable blocks 420a having one end portion hinged to the second movable block 410b of the adjacent first tension assembly 410 together by the second shaft pin L and two fourth movable blocks 420b having one end portion hinged to the first movable block 410a of the adjacent first tension assembly 410 by the first shaft pin H, the other end of one of the fourth movable blocks 420b is hinged with the other end of one of the third movable blocks 420a through a fifth shaft pin P, the other end of the other fourth movable block 420b is hinged with the other end of the other third movable block 420a through a sixth shaft pin Q, the top of the guide push rod 200 is provided with a first guide groove 210, the top of the third shaft pin M of the first tensioning assembly 410 is vertically fixed with the corresponding end of the guide push rod 200, the fourth shaft pin N correspondingly extends into the first guide groove 210 of the guide push rod 200, the top of the moving part 310 of the claw 300 is provided with a second guide groove 310a, the top of the fifth shaft pin P of the second tensioning assembly 420 is fixed with the bottom of the corresponding moving part 310, the sixth shaft pin Q correspondingly extends into the second guide groove 310a of the moving part 310, when one of the guide push rods 200 moves radially inwards relative to the frame 110, the fourth shaft pin N on the first tensioning assembly 410 connected to the guide push rod 200 slides at the outward end of the first guide groove 210, so that both sides of the first tensioning assembly 410 shrink, both sides of the adjacent two second tensioning assemblies 420 connected to the first tensioning assembly 410 expand outwards due to the shrinkage of both sides of the first tensioning assembly 410, both sides of the first tensioning assembly 410 connected to the second tensioning assembly 420 shrink inwards due to the expansion of both sides of the second tensioning assembly 420, and through the sequential interaction of the first tensioning assembly 410 and the second tensioning assembly 420, both sides of all the first tensioning assemblies 410 on the synchronous transmission mechanism 400 shrink inwards synchronously, both sides of all the second tensioning assemblies 420 expand outwards synchronously, and when both sides of the second tensioning assemblies 420 expand outwards synchronously, the second tensioning assemblies 420 drive the jaws 300 connected to the second tensioning assemblies to move inwards synchronously to clamp a workpiece in a self-centering manner.
With reference to fig. 1-5, the four-jaw synchronous self-centering lathe chuck of the present embodiment drives a guide push rod 200 to move, so that synchronous motion of four jaws 300 can be driven by a synchronous transmission mechanism 400 to center and clamp an object, thereby realizing synchronous self-centering of the four jaws, expanding the application range to the situation that geometric centers of shafts, discs, square parts and the like are required to be precisely centered with a turning shaft, and greatly expanding the application range.
Although the invention has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. A four-jaw synchronous self-centering lathe chuck, comprising:
the tray body (100) comprises a frame body (110) which is in a regular octagon shape;
the guide push rod (200) vertically penetrates through four side edges of the frame body (110) and can move radially relative to the frame body (110);
the clamping jaw (300) comprises a moving part (310) which vertically penetrates through the other four sides of the frame body (110) and can radially move relative to the frame body (110) and a claw part (320) which is vertically arranged with the moving part (310), wherein the clamping jaw (300) and the guide push rod (200) are alternately arranged in a circumference manner;
the synchronous transmission mechanism (400) is connected with the guide push rods (200) and the clamping jaws (300), and when any one of the guide push rods (200) moves radially relative to the frame body (110), the synchronous transmission mechanism (400) drives the clamping jaws (300) to synchronously move away from or approach;
the synchronous transmission mechanism (400) comprises a first tensioning assembly (410) and a second tensioning assembly (420) which are sequentially and alternately hinged and are enclosed to be closed, the first tensioning assemblies (410) are connected with the guide push rod (200) in one-to-one correspondence, and the second tensioning assemblies (420) are connected with the moving parts (310) of the clamping jaws (300) in one-to-one correspondence;
when any one of the guide push rods (200) moves radially relative to the frame body (110), the first tensioning assembly (410) expands or tightens, and the second tensioning assembly (420) synchronously tightens or expands along with the first tensioning assembly (410) and drives the clamping jaw (300) to synchronously move away from or approach;
the first tensioning assembly (410) is in a parallelogram shape and comprises two first movable blocks (410 a) with one end hinged through a first shaft pin (H) and two second movable blocks (410 b) with one end hinged through a second shaft pin (L);
the other end part of one second movable block (410 b) is hinged with the other end part of one first movable block (410 a) through a third shaft pin (M), and the other end part of the other second movable block (410 b) is hinged with the other end part of the other first movable block (410 a) through a fourth shaft pin (N);
the second tensioning assembly (420) is in a parallelogram shape and comprises two third movable blocks (420 a) with one end hinged with the second movable blocks (410 b) of the adjacent first tensioning assembly (410) through a second shaft pin (L) and two fourth movable blocks (420 b) with one end hinged with the first movable blocks (410 a) of the adjacent first tensioning assembly (410) through a first shaft pin (H);
the other end of one of the fourth movable blocks (420 b) is hinged to the other end of one of the third movable blocks (420 a) through a fifth shaft pin (P), and the other end of the other fourth movable block (420 b) is hinged to the other end of the other third movable block (420 a) through a sixth shaft pin (Q).
2. The four-jaw synchronous self-centering lathe chuck according to claim 1, wherein the disc body (100) further comprises a flange end cover (120) for sealing the top of the frame body (110) and a jaw end cover (130) for sealing the bottom of the frame body (110), and a sliding groove (130 a) which is distributed in a cross shape and used for moving the jaw (320) is formed in the bottom of the jaw end cover (130).
3. The four-jaw synchronous self-centering lathe chuck according to claim 1, wherein a first guide groove (210) is formed in the top of the guide push rod (200), the top of the third shaft pin (M) of the first tensioning assembly (410) is vertically fixed with the corresponding end of the guide push rod (200), and the fourth shaft pin (N) correspondingly extends into the first guide groove (210) of the guide push rod (200).
4. The four-jaw synchronous self-centering lathe chuck according to claim 1, wherein a second guide groove (310 a) is formed in the top of the moving part (310) of the jaw (300), the top of the fifth shaft pin (P) of the second tensioning assembly (420) is fixed with the bottom of the corresponding moving part (310), and the sixth shaft pin (Q) correspondingly extends into the second guide groove (310 a) of the moving part (310).
5. A four-jaw synchronous self-centering lathe chuck as claimed in any of claims 1-4, characterized in that one of the guide pushrods (200) is provided with a rotatable threaded spindle, and the side wall of the frame (110) connected to the guide pushrod (200) is provided with a threaded cylinder (110 a) engaged with the threaded spindle.
6. The four-jaw synchronized self-centering lathe chuck of claim 5, wherein said threaded spindle is provided with a polygonal socket (220 a) or regular polygonal bolt head structure at an end thereof.
7. The four-jaw synchronized self-centering lathe chuck of claim 2, wherein said flange end cap (120) has a flange (120 a) on top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210328296.4A CN114505511B (en) | 2022-03-30 | 2022-03-30 | Four-jaw synchronous self-centering lathe chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210328296.4A CN114505511B (en) | 2022-03-30 | 2022-03-30 | Four-jaw synchronous self-centering lathe chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114505511A CN114505511A (en) | 2022-05-17 |
| CN114505511B true CN114505511B (en) | 2023-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210328296.4A Active CN114505511B (en) | 2022-03-30 | 2022-03-30 | Four-jaw synchronous self-centering lathe chuck |
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| Country | Link |
|---|---|
| CN (1) | CN114505511B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL227360A (en) * | 1957-04-30 | Esfom | ||
| JP2004009151A (en) * | 2002-06-03 | 2004-01-15 | Smc Corp | Three-way opening and closing chuck |
| CN202015850U (en) * | 2011-03-16 | 2011-10-26 | 贺自清 | Self-centering power chuck for star connecting rod |
| CN106583945B (en) * | 2016-12-28 | 2019-01-04 | 张飘 | Four paws automatic centring chuck and lathe |
| CN211331384U (en) * | 2019-10-06 | 2020-08-25 | 安徽坎蒂尼精工科技有限公司 | Novel double-shaft cylinder for pneumatic four-jaw chuck |
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2022
- 2022-03-30 CN CN202210328296.4A patent/CN114505511B/en active Active
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| Publication number | Publication date |
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| CN114505511A (en) | 2022-05-17 |
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