CN115301972A - Three-jaw chuck - Google Patents
Three-jaw chuck Download PDFInfo
- Publication number
- CN115301972A CN115301972A CN202211026807.3A CN202211026807A CN115301972A CN 115301972 A CN115301972 A CN 115301972A CN 202211026807 A CN202211026807 A CN 202211026807A CN 115301972 A CN115301972 A CN 115301972A
- Authority
- CN
- China
- Prior art keywords
- spiral
- transmission worm
- grooves
- disc
- transmission
- 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.)
- Pending
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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
- B23B31/16004—Jaws movement actuated by one or more spiral grooves
Abstract
The invention belongs to the technical field of chucks, and particularly relates to a three-jaw chuck which comprises a chuck body, wherein a plurality of jaw grooves are formed in the surface of the chuck body, jaws are movably arranged in the jaw grooves, a spiral disk for driving the jaws to move is arranged in the chuck body, the spiral disk can rotate in the chuck body, spiral grooves are formed in the surface of the spiral disk, transmission grooves corresponding to the spiral grooves are formed in the inner side surfaces of the jaws, the transmission grooves on the jaws are clamped on the spiral grooves, and the jaws can be driven to move along the jaw grooves by the rotation of the spiral disk through the spiral grooves; the driving assembly is arranged in the disc body and used for rotating the spiral disc, the driving assembly comprises a power source, a transmission worm and a transmission worm wheel, the transmission worm wheel is connected with the spiral disc, the power source can drive the transmission worm wheel to rotate through the transmission worm, and the transmission worm wheel rotates and synchronously drives the spiral disc to rotate; the invention has simple structure and clamps the workpiece without returning.
Description
Technical Field
The invention belongs to the technical field of chucks, and particularly relates to a three-jaw chuck.
Background
The chuck is the mechanical device who is used for pressing from both sides tight work piece on the lathe, the three-jaw chuck generally comprises the disk body, jack catch and the drive structure that the drive jack catch removed, the drive structure on present market mainly has two kinds, one kind is conventional manual structure, rotate the regulation tooth on the chuck through the chuck spanner, it removes to drive the jack catch through mechanical structure, make the jack catch clip the work piece, manual formula three-jaw chuck generally only is used for some little work pieces of centre gripping, and it is harder when centre gripping work piece, if the centre gripping is insecure, make the work piece fly out easily in the course of working, cause the potential safety hazard. The other type is an electric drive three-jaw chuck, the electric drive three-jaw chuck also has obvious defects, the electric three-jaw chuck is provided with a large-torque motor, the motor drives a driving disc in the chuck body to rotate through a transmission shaft and then drives a clamping jaw to move, when the motor torque is small, a workpiece cannot be clamped tightly, when the motor torque is large, the transmission shaft can receive very large torsional force when the motor is started, and the requirement on the transmission shaft is very high.
The existing three-jaw chuck is difficult to ensure that a workpiece is completely clamped and does not return, so that the three-jaw chuck which is stable in transmission and can clamp the workpiece without returning is needed.
Disclosure of Invention
The invention aims to provide a three-jaw chuck which is simple in structure and can clamp a workpiece without returning.
The purpose of the invention is realized as follows:
a three-jaw chuck comprises a chuck body, wherein a plurality of jaw grooves are formed in the surface of the chuck body, jaws are movably arranged in the jaw grooves, a spiral disk used for driving the jaws to move is arranged in the chuck body, the spiral disk can rotate in the chuck body, spiral grooves are formed in the surface of the spiral disk, transmission grooves corresponding to the spiral grooves are formed in the inner side surfaces of the jaws, the transmission grooves in the jaws are clamped on the spiral grooves, and the jaws can be driven to move along the jaw grooves by the rotation of the spiral disk;
still be provided with in the disk body and be used for the spiral disk pivoted drive assembly, drive assembly includes power supply, transmission worm wheel, the transmission worm wheel is connected with the spiral disk, power supply accessible transmission worm drives the transmission worm wheel and rotates, and the transmission worm wheel rotates and drives the spiral disk rotation in step.
The invention further discloses that a worm mounting cavity is formed in the disc body, the transmission worm is arranged in the worm mounting cavity and meshed with the transmission worm wheel, bearings are sleeved at the front end and the rear end of the transmission worm, and the power source is arranged at the rear end of the transmission worm and connected with the transmission worm.
Furthermore, a motor shaft of the power source is provided with a pinion, the rear end of the transmission worm is provided with a bull gear, and the pinion is meshed with the bull gear.
Furthermore, a circular centering groove is formed in the center of the inner side of the disc body, a circular centering portion is formed in the center of the transmission worm wheel in a protruding mode, the centering portion is located in the centering groove, and a centering bearing is arranged on the outer side face of the centering portion and the inner side face of the centering groove.
Further, the spiral disc and the transmission worm wheel are both provided with screw holes, and the spiral disc and the transmission worm wheel are fixedly connected through screws.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
the invention relates to a three-jaw chuck for a machine tool, which is mainly used for clamping and fixing a workpiece. The inside of disk body is provided with the spiral dish, and the helicla flute has been seted up on the surface of spiral dish, the medial surface of jack catch seted up with the driving groove that the helicla flute corresponds, the spiral dish rotation can drive the jack catch through the helicla flute and remove, because the jack catch sets up at the jack catch inslot, therefore the jack catch can only remove in the jack catch inslot. The driving assembly comprises a power source, a transmission worm and a transmission worm wheel, wherein the power source rotates to drive the transmission worm to rotate, the transmission worm is arranged on the side edge of the transmission worm wheel and is meshed with the transmission worm, the transmission worm rotates to drive the transmission worm wheel to rotate, the transmission worm wheel is fixed with the spiral disc, so that the power source can drive the clamping jaws to move, a large reduction ratio is formed between the transmission worm and the transmission worm wheel, the bearing capacity is high, the self-locking is realized, the transmission worm can smoothly drive the transmission worm wheel to rotate by rotating, and otherwise, the transmission worm wheel is difficult to drive the transmission worm to rotate, so that the workpiece can be clamped by the power source, and the clamping jaws can be prevented from returning. And simple structure, the transmission is steady, and the noise is also little.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a front sectional view of the present invention.
Fig. 4 is a side sectional view of the present invention.
FIG. 5 is a schematic diagram of the internal structure of the present invention.
FIG. 6 is a second schematic diagram of the internal structure of the present invention.
Fig. 7 is one of the exploded views of the internal structure of the present invention.
Fig. 8 is an exploded view of the second internal structure of the present invention.
Fig. 9 is one of the structural schematic diagrams of the driving assembly of the present invention.
FIG. 10 is a second schematic view of the driving assembly of the present invention.
The reference numerals in the figures denote the meanings:
1-a tray body; 2-a jaw groove; 3-clamping jaws; 4-a spiral disc; 5-spiral groove; 6-a transmission groove; 7-a drive assembly; 8-a power source; 9-a drive worm; 10-a drive worm gear; 11-a bearing; 12-a pinion gear; 13-gearwheel; 14-a centering groove; 15-centering; 16-a centering bearing; 17-screw hole.
Detailed Description
The invention is further described below with reference to specific examples:
a three-jaw chuck comprises a chuck body 1, wherein a plurality of jaw grooves 2 are formed in the surface of the chuck body 1, jaws 3 are movably arranged in the jaw grooves 2, a spiral disc 4 used for driving the jaws 3 to move is arranged in the chuck body 1, the spiral disc 4 can rotate in the chuck body 1, spiral grooves 5 are formed in the surface of the spiral disc 4, transmission grooves 6 corresponding to the spiral grooves 5 are formed in the inner side surface of the jaws 3, the transmission grooves 6 in the jaws 3 are clamped on the spiral grooves 5, and the rotation of the spiral disc 4 can drive the jaws 3 to move along the jaw grooves 2 through the spiral grooves 5;
still be provided with in the disk body 1 and be used for 4 pivoted drive assembly 7 of helicoidal disc, drive assembly 7 includes power supply 8, transmission worm 9, transmission worm wheel 10 is connected with helicoidal disc 4, 8 accessible transmission worm 9 of power supply drive transmission worm wheel 10 and rotate, and transmission worm wheel 10 rotates and drives 4 rotations of helicoidal disc in step.
The invention relates to a three-jaw chuck for a machine tool, which is mainly used for clamping and fixing workpieces and comprises a chuck body 1, wherein a plurality of jaw grooves 2 are formed in the surface of the chuck body 1, the jaw grooves 2 are uniformly distributed on the surface of the chuck body 1, one ends of the jaw grooves 2 are gathered at the center of the chuck body 1, jaws 3 capable of moving in the jaw grooves 2 are arranged in the jaw grooves 2, and the workpieces can be clamped on the surface of the chuck body 1 through the jaws 3. The inside of disk body 1 is provided with spiral disk 4, and helicla flute 5 has been seted up on the surface of spiral disk 4, the medial surface of jack catch 3 seted up with the driving groove 6 that helicla flute 5 corresponds, spiral disk 4 rotate can drive jack catch 3 through helicla flute 5 and remove, because jack catch 3 sets up in jack catch groove 2, consequently jack catch 3 only can remove in jack catch groove 2. Particularly, the screw disc 4 is driven to rotate by the driving assembly 7, the driving assembly 7 comprises a power source 8, a transmission worm 9 and a transmission worm wheel 10, the power source 8 drives the transmission worm 9 to rotate, the transmission worm 9 is arranged on the side edge of the transmission worm wheel 10 and meshed with the transmission worm wheel 10, the transmission worm 9 rotates to drive the transmission worm wheel 10 to rotate, the transmission worm wheel 10 is fixed with the screw disc 4, so that the power source 8 can drive the clamping jaws 3 to move, a large reduction ratio is formed between the transmission worm 9 and the transmission worm wheel 10, the bearing capacity is high, the self-locking is realized, the transmission worm 9 can smoothly drive the transmission worm wheel 10 to rotate by rotation, and on the contrary, the transmission worm wheel 10 hardly drives the transmission worm 9 to rotate, so that the workpiece can be clamped by the power source 8 and the clamping jaws 3 can be prevented from returning. And simple structure, the transmission is steady, and the noise is also little.
According to a preferable scheme of the invention, a worm mounting cavity is formed in the disc body 1, the transmission worm 9 is arranged in the worm mounting cavity and meshed with the transmission worm wheel 10, bearings 11 are sleeved at the front end and the rear end of the transmission worm 9, and the power source 8 is arranged at the rear end of the transmission worm 9 and connected with the transmission worm.
In a preferred embodiment of the present invention, a motor shaft of the power source 8 is provided with a pinion 12, a rear end of the driving worm 9 is provided with a bull gear 13, and the pinion 12 is engaged with the bull gear 13. The middle step of the power source 8 for controlling the clamping jaw 3 is provided with a plurality of groups of speed reducers, so that the clamping jaw 3 can move more stably, the moment for moving the clamping jaw 3 is larger, a workpiece is clamped more easily, and the workpiece is not easy to loosen. The jaw 3 is also not easy to retreat.
According to a preferable scheme of the invention, a circular centering groove 14 is formed in the center of the inner side of the disc body 1, a circular centering portion 15 is formed in the center of the transmission worm wheel 10 in a protruding mode, the centering portion 15 is located in the centering groove 14, and a centering bearing 16 is arranged on the outer side surface of the centering portion 15 and the inner side surface of the centering groove 14. Through the cooperation of the centering portion 15 and the centering groove 14, the centering groove 14 limits the moving space of the centering portion 15, so that the centering portion 15 can only rotate in the centering groove 14, and the transmission worm wheel 10 and the spiral disk 4 can rotate more stably and more precisely.
According to a preferable scheme of the invention, the spiral disk 4 and the transmission worm wheel 10 are both provided with screw holes 17, and the spiral disk 4 and the transmission worm wheel 10 are fixedly connected through screws. The spiral disk 4 and the transmission worm wheel 10 can be well fixed together through screw connection, and the assembly is simple and convenient.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.
Claims (5)
1. A three-jaw chuck, characterized by: the clamping jaw structure comprises a disc body (1), wherein a plurality of clamping jaw grooves (2) are formed in the surface of the disc body (1), clamping jaws (3) are movably arranged in the clamping jaw grooves (2), a spiral disc (4) used for driving the clamping jaws (3) to move is arranged in the disc body (1), the spiral disc (4) can rotate in the disc body (1), spiral grooves (5) are formed in the surface of the spiral disc (4), transmission grooves (6) corresponding to the spiral grooves (5) are formed in the inner side surfaces of the clamping jaws (3), the transmission grooves (6) in the clamping jaws (3) are clamped on the spiral grooves (5), and the spiral disc (4) can rotate to drive the clamping jaws (3) to move along the clamping jaw grooves (2) through the spiral grooves (5);
still be provided with in disk body (1) and be used for spiral dish (4) pivoted drive assembly (7), drive assembly (7) include power supply (8), transmission worm (9), transmission worm wheel (10) are connected with spiral dish (4), power supply (8) accessible transmission worm (9) drive transmission worm wheel (10) and rotate, and transmission worm wheel (10) rotate and drive spiral dish (4) rotation in step.
2. A three-jaw chuck according to claim 1, wherein: the shaping has the worm installation cavity in the disk body (1), transmission worm (9) set up in the worm installation cavity and mesh with transmission worm wheel (10), both ends cover is equipped with bearing (11) around transmission worm (9), power supply (8) set up in transmission worm (9) rear end and are connected with it.
3. A three-jaw chuck according to claim 1, wherein: a small gear (12) is arranged on a motor shaft of the power source (8), a large gear (13) is arranged at the rear end of the transmission worm (9), and the small gear (12) is meshed with the large gear (13).
4. A three-jaw chuck according to any one of claims 1 to 3, wherein: a circular centering groove (14) is formed in the center of the inner side of the disc body (1), a circular centering portion (15) is formed in the center of the transmission worm wheel (10) in a protruding mode, the centering portion (15) is located in the centering groove (14), and a centering bearing (16) is arranged on the outer side face of the centering portion (15) and the inner side face of the centering groove (14).
5. The three-jaw chuck according to claim 4, wherein: screw holes (17) are formed in the spiral disc (4) and the transmission worm wheel (10), and the spiral disc (4) is fixedly connected with the transmission worm wheel (10) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211026807.3A CN115301972A (en) | 2022-08-25 | 2022-08-25 | Three-jaw chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211026807.3A CN115301972A (en) | 2022-08-25 | 2022-08-25 | Three-jaw chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115301972A true CN115301972A (en) | 2022-11-08 |
Family
ID=83864553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211026807.3A Pending CN115301972A (en) | 2022-08-25 | 2022-08-25 | Three-jaw chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115301972A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647720A (en) * | 2022-12-26 | 2023-01-31 | 柳工常州机械有限公司 | Excavator underframe clamp and positioner thereof |
-
2022
- 2022-08-25 CN CN202211026807.3A patent/CN115301972A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647720A (en) * | 2022-12-26 | 2023-01-31 | 柳工常州机械有限公司 | Excavator underframe clamp and positioner thereof |
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