CN213496568U

CN213496568U - Automatic centering three-jaw chuck

Info

Publication number: CN213496568U
Application number: CN202021328194.5U
Authority: CN
Inventors: 胡文正
Original assignee: Individual
Current assignee: Yongkang Chaobozhongguan Industry And Trade Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-06-22
Anticipated expiration: 2030-07-08

Abstract

The utility model belongs to the technical field of machining, concretely relates to clamping chuck. The utility model provides an automatic centering three-jaw chuck, includes the disk body and installs the driving-disc in the disk body, has installed the mobilizable clamping part of a plurality of in the disk body, and the equal shaping of every clamping part rear end has the direction screw thread, the shaping of driving-disc bottom has the helicla flute with direction screw thread fit, has installed axis of rotation and the planet wheel of meshing with the axis of rotation on the driving-disc, and the planet wheel overcoat is equipped with the wheel rim fixed with the disk body, and axis of rotation drive planet wheel is at the wheel rim internal rotation, drives the driving-disc through the planet wheel and rotates, and. Make planetary gear rotate through the drive axis of rotation, drive the driving-disc through the planet wheel and rotate for thereby three jack catch chucking axle class part guarantees the concentricity of axle class part simultaneously, reduces the error that axle class part circle is beated, reaches high accuracy centering and presss from both sides tightly, has solved the problem that three-jaw chuck presss from both sides the unstability and leads to the low precision of processing back.

Description

Automatic centering three-jaw chuck

Technical Field

The utility model belongs to the technical field of machining, concretely relates to clamping chuck.

Background

The existing chuck is a mechanical device used for clamping workpieces on a machine tool, and generally comprises a chuck body, movable clamping jaws and a clamping jaw driving mechanism, wherein the movable clamping jaws uniformly distributed on the chuck body move radially to clamp the workpieces, but the self-centering three-jaw chuck on the market can not ensure that the clamping force of each jaw is the same when clamping the workpieces through radial concentric movement, the concentricity of shaft parts can not be ensured, the circular run-out precision error of the shaft parts is too high, the finished product precision error caused by processing is higher, sometimes, a processor can clamp the workpieces repeatedly because of not being clamped in place, time and labor are wasted when clamping the workpieces, and the clamping force of each clamping jaw can not be accurately controlled.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automatic centering three-jaw chuck makes planetary gear rotate through the drive axis of rotation, drives the driving-disc through the planet wheel and rotates for thereby three jack catch chucking axle class part guarantees the concentricity of axle type part simultaneously, reduces the error that axle type part circle is beated, reaches high accuracy centering and presss from both sides tightly, has solved the problem that three-jaw chuck presss from both sides the shakiness and leads to the low precision of processing back.

The purpose of the utility model is realized like this: the utility model provides an automatic centering three-jaw chuck, includes the disk body and installs the driving-disc in the disk body, has installed the mobilizable clamping part of a plurality of in the disk body, and the equal shaping of every clamping part rear end has the direction screw thread, the shaping of driving-disc bottom has the helicla flute with direction screw thread fit, has installed axis of rotation and the planet wheel of meshing with the axis of rotation on the driving-disc, and the planet wheel overcoat is equipped with the wheel rim fixed with the disk body, and axis of rotation drive planet wheel is at the wheel rim internal rotation, drives the driving-disc through the planet wheel and rotates, and.

Preferably, step portion is formed in the disc body, a third guide bearing is sleeved on the step portion, and a guide groove matched with the third guide bearing is formed in the lower end of the driving disc.

Preferably, the step portion is provided with a first positioning groove, a first guide bearing is fixedly arranged in the first positioning groove, and the first guide bearing is sleeved at one end of the rotating shaft.

Preferably, a cover is arranged on the disk body, a second positioning groove is formed in the middle of the cover, a second guide bearing is fixedly arranged in the second positioning groove, and the second guide bearing is sleeved at the other end of the rotating shaft.

Preferably, a plurality of first limiting grooves are formed in the outer edge of the disc cover, limiting ring grooves matched with the first limiting grooves are formed in the disc body, and the disc cover is fastened on the disc body by clamping the fasteners into the first limiting grooves and the limiting ring grooves simultaneously.

Preferably, the upper end face of the disk cover is provided with a plurality of fastening holes, and the fastening pieces are screwed in the fastening holes until the fastening pieces abut against the upper end face of the wheel rim.

Preferably, a plurality of first fixing holes are formed in the disc body, a plurality of second fixing holes matched with the first fixing holes are formed in the rim, and the rim is fixed in the disc body by a fastener penetrating through the first fixing holes and the second fixing holes.

Preferably, a plurality of guide grooves are formed in the disc body, sliding blocks or sliding grooves are formed in the guide grooves, sliding grooves corresponding to the sliding blocks or sliding blocks corresponding to the sliding grooves are formed in two sides of the clamping portion, and the clamping portion is inserted into the sliding grooves through the sliding blocks so as to slide in the guide grooves.

Preferably, a plurality of fixed shafts are formed on the driving disc, and the planet wheel sleeves the fixed shafts to rotate.

Compared with the prior art, the utility model outstanding and profitable technological effect is: the planetary gear is driven by the rotating shaft to rotate in the wheel rim, the driving disc is driven by the planetary gear to rotate, so that the shaft parts are simultaneously clamped by the three clamping jaws, the rotating shaft is driven by the planetary gear, the centrifugal force is eliminated by the planetary gear, the concentricity of the shaft parts is ensured, the error of circular run-out of the shaft parts is reduced, and high-precision centering clamping is achieved; through adding both ends and establishing first guide bearing and second guide bearing about the axis of rotation for both ends are fixed a position about the axis of rotation about first guide bearing and second guide bearing make the axis of rotation avoid producing when driving-disc rotates rock and reduce the frictional force when rotating about, thereby guarantee the stability of axis of rotation when the transmission.

Drawings

Fig. 1 is one of the exploded views in the embodiment of the present invention.

Fig. 2 is an exploded view of the second embodiment of the present invention.

Fig. 3 is one of the partial exploded views in the embodiment of the present invention.

Fig. 4 is one of the schematic structural diagrams in the embodiment of the present invention.

Fig. 5 is a second schematic structural diagram in the embodiment of the present invention.

Fig. 6 is one of the schematic structural diagrams of the embodiment of the present invention after the tray cover is hidden.

Fig. 7 is a second schematic structural diagram of the embodiment of the present invention after the tray cover is hidden.

Fig. 8 is a second partial exploded view in the embodiment of the present invention.

Fig. 9 is a third partial exploded view in the embodiment of the present invention.

Fig. 10 is a cross-sectional view in an embodiment of the invention.

Fig. 11 is a schematic view of the internal structure of the tray body according to the embodiment of the present invention.

Reference numerals: 1-a tray body; 2-a drive disc; 3-a clamping part; 4-guiding screw thread; 5-spiral groove; 6-planet wheel; 7-a rim; 8-a rotating shaft; 9-a fixed shaft; 10-a first limit groove; 11-a limiting ring groove; 12-fastening holes; 13-a step portion; 14-a third guide bearing; 15-a first guide groove; 16-a first fixation hole; 17-a second fixation hole; 21-a first guide bearing; 22-a first positioning groove; 23-a tray cover; 24-a second positioning groove; 25-a second guide bearing; 26-second guide groove.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-11, an automatic centering three-jaw chuck includes a disk body 1 and a driving disk 2 installed in the disk body 1, three movable clamping portions 3 are installed in the disk body 1, a guide thread 4 is formed at the rear end of each clamping portion 3, a spiral groove 5 meshed with the guide thread 4 is formed at the bottom of the driving disk 2, a rotating shaft 8 and a planetary wheel 6 meshed with the rotating shaft 8 are installed on the driving disk 2, a plurality of fixed shafts 9 are formed on the driving disk 2, the planetary wheel 6 is sleeved on the fixed shafts 9 to rotate, a rim 7 fixed with the disk body 1 is sleeved outside the planetary wheel 6, the rotating shaft 8 drives the planetary wheel 6 to rotate in the rim 7, the driving disk 2 is driven to rotate by the planetary wheel 6, and the driving disk 2 drives the clamping portions 3 to move back.

Through 8 drive planet wheels 6 of axis of rotation 7 rotations in the wheel rim, drive driving-disc 2 rotations through planet wheels 6 for three jack catch chucking axle type part simultaneously, and axis of rotation 8 has eliminated centrifugal force through planetary gear transmission, guarantees the concentricity of axle type part, reduces the error that axle type part circle is beated, thereby reaches high accuracy centering clamp tightly, and clamping speed is faster.

Further, a first positioning groove 22 is formed in the step portion 13, a first guide bearing 21 is fixedly arranged in the first positioning groove 22, and the first guide bearing 21 is sleeved on the upper end of the rotating shaft 8.

Further, a tray cover 23 is arranged on the tray body 1, a second positioning groove 24 is formed in the middle of the tray cover 23, a second guide bearing 25 is fixedly arranged in the second positioning groove 24, and the second guide bearing 25 is sleeved at the lower end of the rotating shaft 8.

Through adding at both ends about axis of rotation 8 and establishing first guide bearing 21 and second guide bearing 25 for first guide bearing 21 and second guide bearing 25 live with both ends location about the axis of rotation 8, make axis of rotation 8 avoid producing when driving-disc 2 rotates and control the rocking and reduce the frictional force when rotating, thereby guarantee the stability of axis of rotation 8 when the transmission.

Further setting up, the shaping has step portion 13 in the disk body 1, the cover is equipped with third guide bearing 14 on step portion 13, drive-disc 2 lower extreme seted up with the first guide way 15 of third guide bearing 14 complex, aim at step portion 13 with the first guide way 15 of drive-disc 2, at this moment third guide bearing 14 then plays the effect of supporting drive-disc 2, thereby reduce the frictional force of drive-disc 2 when rotating, guarantee with this that drive-disc 2 drive clamping part 3 in-process can not the drunkenness, make the jack catch of three clamping part 3 press from both sides tightly simultaneously, guarantee its centering precision.

The outer edge of the disc cover 23 is provided with three first limiting grooves 10, the inner wall of the disc body 1 is provided with a limiting ring groove 11 matched with the first limiting grooves 10, the shape of the fastening piece is matched with that of the first limiting grooves 10, the three fastening pieces are inserted into the first limiting grooves 10 and are simultaneously and tightly inserted along the limiting ring grooves 11, so that the disc cover 23 is just fastened on the disc body 1, the disc cover 23 is ensured not to rotate, and meanwhile, the bottom of the disc cover 23 cannot directly contact the upper end part of the wheel rim 7, and the disc cover 23 is prevented from being damaged by repeated assembly and disassembly; in order to enable the disk cover 23 to be clamped in the disk body 1 better, the upper end face of the disk cover 23 is uniformly provided with the three fastening holes 12, and bolts are screwed in the fastening holes 12 until the bolts abut against the upper end face of the rim 7, so that the stability of the disk cover 23 fixed on the disk body 1 is greatly improved.

Evenly seted up three first fixed orifices 16 in the disk body 1, set up the second fixed orifices 17 with 16 size looks adaptations of first fixed orifices on the wheel rim 7, pass first fixed orifices 16 and second fixed orifices 17 through fastening bolt and make wheel rim 7 fix in disk body 1, only need to roll out three fastening bolt and can tear down wheel rim 7 when dismantling, no matter go up more convenient and fast when the equipment of leaving the factory, the dismouting is also very convenient equally moreover when maintenance or washing.

A sliding block or a sliding groove is formed in the second guide groove 26, sliding grooves corresponding to the sliding block or sliding blocks corresponding to the sliding grooves are formed in two sides of the clamping portion 3, and the sliding block is inserted into the sliding grooves to enable the clamping portion 3 to slide in the second guide groove 26. Three second guide way 26 has been seted up in disk body 1, and the shaping of second guide way 26 inner wall bilateral symmetry has the slider, and the shaping of 3 both sides of clamping part has the spout, inserts through the slider and makes clamping part 3 slide around can realizing in second guide way 26 in the spout to thereby cooperation driving-disc 2 rotates and drives clamping part 3 and remove, and it is also more smooth and easy and stable to slide under the prerequisite that guarantees that every claw clamp force is the same.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an automatic centering three-jaw chuck which characterized in that: including disk body (1) and install driving-disc (2) in disk body (1), installed movable clamping part (3) of a plurality of in disk body (1), every clamping part (3) rear end all takes shape has guide thread (4), driving-disc (2) bottom shaping has spiral groove (5) with guide thread (4) complex, has installed axis of rotation (8) on driving-disc (2) and planet wheel (6) with axis of rotation (8) engaged with, and planet wheel (6) overcoat is equipped with rim (7) fixed with disk body (1), and axis of rotation (8) drive planet wheel (6) are at rim (7) internal rotation, drive driving-disc (2) through planet wheel (6) and rotate, and driving-disc (2) drive clamping part (3) back-and-forth movement.

2. A self-centering three-jaw chuck according to claim 1, wherein: step portion (13) are formed in the disk body (1), a third guide bearing (14) is sleeved on the step portion (13), and a first guide groove (15) matched with the third guide bearing (14) is formed in the lower end of the driving disk (2).

3. A self-centering three-jaw chuck according to claim 2, wherein: the step part (13) is provided with a first positioning groove (22), a first guide bearing (21) is fixedly arranged in the first positioning groove (22), and the first guide bearing (21) is sleeved at one end of the rotating shaft (8).

4. A self-centering three-jaw chuck according to claim 1, 2 or 3, wherein: a plate cover (23) is arranged on the plate body (1), a second positioning groove (24) is formed in the middle of the plate cover (23), a second guide bearing (25) is fixedly arranged in the second positioning groove (24), and the other end of the rotating shaft (8) is sleeved with the second guide bearing (25).

5. The self-centering three-jaw chuck as claimed in claim 4, wherein: a plurality of first limiting grooves (10) are formed in the outer edge of the disc cover (23), limiting ring grooves (11) matched with the first limiting grooves (10) are formed in the disc body (1), and the disc cover (23) is fastened on the disc body (1) by clamping fasteners into the first limiting grooves (10) and the limiting ring grooves (11) simultaneously.

6. The self-centering three-jaw chuck as claimed in claim 5, wherein: a plurality of fastening holes (12) are formed in the upper end face of the disc cover (23), and the fastening pieces are screwed in the fastening holes (12) until the fastening pieces abut against the upper end face of the rim (7).

7. A self-centering three-jaw chuck according to claim 1, wherein: a plurality of first fixing holes (16) are formed in the disc body (1), a plurality of second fixing holes (17) matched with the first fixing holes (16) are formed in the rim (7), and the rim (7) is fixed in the disc body (1) through the first fixing holes (16) and the second fixing holes (17) which are penetrated by fasteners.

8. A self-centering three-jaw chuck according to claim 1, wherein: a plurality of second guide grooves (26) are formed in the disc body (1), sliding blocks or sliding grooves are formed in the second guide grooves (26), sliding grooves corresponding to the sliding blocks or sliding blocks corresponding to the sliding grooves are formed in the two sides of the clamping portion (3), and the clamping portion (3) can slide in the second guide grooves (26) by inserting the sliding blocks into the sliding grooves.

9. A self-centering three-jaw chuck according to claim 1, wherein: a plurality of fixed shafts (9) are formed on the driving disc (2), and the planet wheel (6) is sleeved on the fixed shafts (9) to rotate.