CN210010474U

CN210010474U - Direct-drive chuck

Info

Publication number: CN210010474U
Application number: CN201920593399.7U
Authority: CN
Inventors: 任俊杰; 胡元汉; 石利军; 肖静静
Original assignee: Changzhou Dai Rui Ke Electromechanical Technology Co Ltd
Current assignee: Changzhou Dai Rui Ke Electromechanical Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-02-04
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a direct-drive chuck, which comprises a base, a chuck and a direct-drive torque motor; the direct-drive torque motor is arranged on the base; the chuck is fixed on an output shaft of the direct-drive torque motor. The utility model discloses a directly drive torque motor comes direct drive chuck to rotate, does not have transmission structure, just so can eliminate the clearance between gear and the gear in the traditional chuck transmission, avoids wearing and tearing between the gear to make the precision of processing work piece improve, directly drive chuck through directly driving torque motor and rotate, transmission efficiency can reach 99.99%; the direct-drive torque motor has the advantages of good control stability, small inertia ratio, small error of controlling the rotation of the chuck, good torsional rigidity and quick response, and can solve the problem of hysteresis of the traditional motor; and the middle of the direct-drive torque motor is hollow, and the hollow part can be used for penetrating through a processed workpiece and a rear clamp.

Description

Direct-drive chuck

Technical Field

The utility model belongs to the technical field of the chuck, concretely relates to direct-drive chuck.

Background

The processing of pipe materials and section bars made of various metal materials widely adopts a professional laser pipe cutting machine or a plate pipe integrated machine. Customers pay attention to the stability and reliability of clamping force and the machining precision of workpieces during pipe machining. The traditional chuck adopts a servo motor, a speed reducer, a driving gear and a driven gear, and gaps are generated among the speed reducer, the driving gear and the driven gear due to installation among teeth and the machining problem of the driving gear and the driven gear during machining, so that the precision of a machined workpiece is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a direct drive formula chuck can eliminate the clearance between traditional chuck transmission intermediate gear and the gear to make the precision of processing work piece improve.

Realize the utility model discloses the technical scheme of purpose is:

a direct-drive chuck comprises a base, a chuck and a direct-drive torque motor; the direct-drive torque motor is arranged on the base; the chuck is fixed on an output shaft of the direct-drive torque motor.

Further, the direct-drive torque motor comprises a shell which is fixed on the base; the stator is arranged on the shell; the rotor is connected with the output shaft or is an integral part with the output shaft and is used for driving the chuck to rotate; and the encoder is arranged on the stator and used for detecting the rotation information of the rotor so as to feed back the rotation position of the chuck.

Furthermore, at least one pair of jaws which are symmetrically arranged is arranged on the end surface of the chuck; and a driving mechanism for driving the jaws to move is arranged in the chuck.

Further, a height difference is formed between any two different pairs of jaws.

Furthermore, the number of the driving mechanisms is at least one, and one driving mechanism can at least drive one or more than one clamping jaw to move.

Furthermore, the driving mechanism comprises at least two sliding blocks which are connected with the chuck in a sliding manner and used for mounting the clamping jaws, one end of the bottom of each sliding block is provided with a guide shaft, and the number of the sliding blocks is the same as that of the clamping jaws; the flange is positioned below the sliding block, an arc-shaped guide groove and an arc-shaped accommodating groove are formed in the flange, and the guide shaft is arranged in the arc-shaped guide groove; one power source below the flange, with one end set with limit shaft and the other end set with driving shaft; the limiting shaft is arranged in the arc-shaped accommodating groove, and the driving shaft is arranged on the end face of the flange.

Furthermore, the clamping jaw comprises a clamping sleeve which is arranged on the sliding block, one end of the clamping sleeve is provided with a clamping groove, and two opposite groove walls of the clamping groove are provided with jacks; the pin shaft is arranged in the clamping groove, and two opposite ends of the pin shaft are respectively arranged in the two inserting holes; the rolling shaft is sleeved on the pin shaft; two eccentric sleeves; the two opposite ends of the pin shaft are respectively sleeved and arranged in the jack.

Furthermore, the clamping sleeve is provided with two locking holes communicated with the jack, the two locking holes are respectively arranged on two sides of the jack and are arranged oppositely, locking bolts are arranged in the two locking holes, and the two locking bolts tightly push the eccentric sleeve.

Furthermore, a limiting groove is arranged on the eccentric sleeve, and the cross section of the limiting groove is crescent; the two locking bolts are both propped against the area of the limiting groove.

Furthermore, one end of the eccentric sleeve is provided with an adjusting block, and the adjusting block is positioned outside the clamping sleeve.

By adopting the technical scheme, the utility model discloses following beneficial effect has: (1) the utility model discloses a directly drive torque motor and come direct drive chuck rotation, do not have gear structure, just so can eliminate the clearance between gear and the gear in the traditional chuck transmission, avoid wearing and tearing between the gear to make the precision of processing work piece improve, through directly driving torque motor direct drive chuck rotation, transmission efficiency can reach 99.99%; the direct-drive torque motor has the advantages of good control stability, small inertia ratio, small error of controlling the rotation of the chuck, good torsional rigidity and quick response, and can solve the problem of hysteresis of the traditional motor; and the middle of the direct-drive torque motor is hollow, and the hollow part can be used for penetrating through a processed workpiece and a rear clamp.

(2) The utility model discloses well encoder adopts the optical encoder of highest performance, and it provides digital position feedback, has superior metrology, high speed and high reliability, the rotatory position of feedback chuck that can be accurate.

(3) The utility model discloses a jack catch can step up the work piece and process on the chuck, and actuating mechanism is used for driving the jack catch, realizes that the jack catch steps up or loosens the work piece.

(4) The utility model discloses in adjacent two form the difference in height between the jack catch, can guarantee like this that a plurality of jack catches can both step up the work piece, avoid mutual interference.

(5) The utility model discloses a power supply makes the drive shaft motion, because the drive shaft is in the arc storage tank, and can support the one end of arc storage tank when moving, the drive shaft can drive the flange and rotate this moment, again because the guiding axle is in the arc guide way, so when the flange pivoted, the arc guide way forces the guiding axle to follow the radial motion at the chuck to make the radial motion of sub-chuck of slider, realize driving the jack catch removal promptly and step up or loosen the work piece.

(6) The utility model discloses a jack catch passes through the roller bearing and presss from both sides tight work piece, drives the round pin axle through rotating eccentric sleeve and rotates to the realization is to the fine setting of roller bearing, thereby can adjust the centre gripping precision of jack catch.

(7) The utility model discloses a position of eccentric cover can be fixed in the cooperation of two locking bolts and spacing groove, prevents that eccentric cover from rotating when pressing from both sides the work piece.

(8) The utility model discloses a rotation of eccentric cover, convenient operation are realized to the rotation adjusting block.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

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 sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural diagram of the driving mechanism of the present invention;

fig. 5 is a side view of the driving mechanism of the present invention;

fig. 6 is a schematic structural view of a jaw in the present invention;

fig. 7 is a front view of the jaw of the present invention;

FIG. 8 is a sectional view taken along line B-B of FIG. 7;

FIG. 9 is a cross-sectional view taken along line C-C of FIG. 7;

FIG. 10 is a schematic structural view of an eccentric sleeve according to the present invention;

FIG. 11 is a front view of the eccentric sleeve of the present invention;

fig. 12 is another schematic structural view of the present invention;

FIG. 13 is a schematic structural view of the drive mechanism of FIG. 12;

FIG. 14 is a rear view of FIG. 13;

fig. 15 is a schematic view of the connection of the two flanges of fig. 12.

In the drawing, a base 1, a chuck 2, a direct-drive torque motor 3, a housing 31, a stator 32, a rotor 33, an encoder 34, a jaw 4, a clamping sleeve 41, a clamping groove 411, a rolling shaft 42, a clamping column 421, an eccentric sleeve 43, an adjusting block 431, a limiting groove 432, a locking hole 44, a locking bolt 441, a pin shaft 45, a driving mechanism 5, a sliding block 51, a guide shaft 511, a flange 52, an arc-shaped guide groove 521, an arc-shaped accommodating groove 522, a power source 53, a limiting shaft 531, a driving shaft 532, a through hole 54 and an arc-shaped displacement groove 55 are provided.

Detailed Description

(example 1)

Referring to fig. 1 to 11, the direct drive chuck of the present embodiment includes a base 1, a chuck 2, and a direct drive torque motor 3. The base 1 is used for supporting the chuck 2 and is installed on laser equipment, directly drives torque motor 3 and sets up on base 1 and directly drives torque motor 3's output shaft and link to each other with chuck 2 for directly drive chuck 2 rotates, and directly drives torque motor 3 and has that inertia is little, can adapt to high rotational speed operation, characteristics that machining efficiency is high.

The middle of the direct-drive torque motor 3 in the embodiment is hollow and is communicated with the middle of the chuck 2, so that a workpiece on the chuck 2 can directly penetrate through the rear part of the chuck 2, and the workpiece can be conveniently machined and clamped. Specifically, direct-drive torque motor 3 includes casing 31, stator 32, rotor 33 and encoder 34, casing 31 is fixed on base 1 through the screw, stator 32 sets up on casing 31, rotor 33 links to each other with the output shaft or is an integral part with the output shaft, be used for driving chuck 2 to rotate, encoder 34 sets up on stator 32, be used for detecting the rotation information of rotor, thereby the rotatory position of feedback chuck 2, encoder 34 in this embodiment adopts optical encoder, optical encoder links to each other with external control ware communication, be used for accepting the information that optical encoder feedbacks, start-stop with control direct-drive torque motor 3, thereby the rotatory position of adjustment chuck 2, so as to conveniently to the processing of work piece, thereby guarantee the machining precision.

At least one driving mechanism 5 is provided, and one driving mechanism 5 can drive at least one or more jaws to move. Install two jack catchs 4 that the symmetry set up on chuck 2's the terminal surface in this embodiment, be equipped with one in chuck 2 and be used for driving two jack catchs 4 simultaneous movement's actuating mechanism 5, through actuating mechanism 5, jack catch 4 can quick adjustment and accurate location, adapts to the tubular product of different specifications of processing, and adaptability is good.

Specifically, the driving mechanism 5 comprises two sliding blocks 51, a flange 52 and a power source 53, the two sliding blocks 51 are symmetrical with each other about the center line of the chuck 2 and are slidably connected with the chuck 2, the chuck 2 is provided with a slide rail connected with the sliding blocks 51, the two sliding blocks 51 are used for mounting the jaws 4, and one end of the bottom of each of the two sliding blocks 51 is provided with a guide shaft 511; the flange 52 is arranged below the sliding block 51 and is arranged on the rotating shaft of the chuck, the flange 52 is provided with an arc-shaped guide groove 521 and an arc-shaped accommodating groove 522, the guide shaft 511 is arranged in the arc-shaped guide groove 521, and the sliding of the sliding block 51 can be realized through the interaction of the guide shaft 511 and the arc-shaped guide groove 521; the power source 53 is located below the flange 52, the power source 53 is an air cylinder or an oil cylinder, in this embodiment, preferably, an air cylinder, one end of the power source 53 is provided with a limit shaft 531, the other end is provided with a driving shaft 532, the limit shaft 531 is disposed in the arc-shaped receiving groove 522, and the driving shaft 532 is fixed on the end surface of the flange 52. When the driving shaft 532 of the power source 53 drives the flange 52 to rotate counterclockwise, the guiding shaft 511 is forced to move towards the axis of the chuck 2 under the action of the arc-shaped guiding groove 521, the two sliding blocks 51 drive the clamping jaws 4 to approach each other, so as to clamp the workpiece, and when the driving shaft 532 of the power source 53 drives the flange 52 to rotate clockwise, the guiding shaft 511 is forced to move away from the axis of the chuck 2 under the action of the arc-shaped guiding groove 521, the two sliding blocks 51 drive the clamping jaws 4 to move away from each other, so as to loosen the workpiece.

It should be noted that, the air passage of the cylinder adopts but is not limited to an air inlet structure of an air distribution ring, and the chuck cannot rotate when a part is clamped; after the parts are clamped, one-way pressure maintaining of the gas path is realized through a check valve in the gas path, the pressure maintaining time can be as long as more than 12 hours, and the influence of sudden gas cut-off during product processing can be avoided.

The jaw 4 comprises a cutting sleeve 41, a pin shaft 45, a rolling shaft 42 and two eccentric sleeves 43, the cutting sleeve 41 is fixed on the sliding block 51, one end of the cutting sleeve 41 is provided with a clamping groove 411, and two opposite groove walls of the clamping groove 411 are both provided with insertion holes; the pin shaft 45 is arranged in the slot 411, and two opposite ends of the pin shaft 45 are respectively arranged in the two jacks; the rolling shaft 42 is sleeved on the pin shaft 45, the rolling shaft 42 can rotate around the axis of the pin shaft 45, and the rolling shaft 42 can ensure that a workpiece can smoothly move and the surface of the workpiece is not damaged in a continuous processing state; the two eccentric sleeves 43 are respectively sleeved on two opposite ends of the pin shaft, the two eccentric sleeves 43 are both positioned in the insertion holes, one end of each eccentric sleeve 43 is provided with an adjusting block 431, and the adjusting blocks 431 are positioned outside the clamping sleeve 41.

Two locking holes 44 communicated with the insertion hole are formed in two sides of the cutting sleeve 41, the two locking holes 44 are arranged on two sides of the insertion hole respectively and are arranged oppositely, for example, the axial lines of the two locking holes 44 are located on the same horizontal line, locking bolts 441 are arranged in the two locking holes 44, and the two locking bolts 441 tightly push the eccentric sleeve 43. A limiting groove 432 is formed in the eccentric sleeve 43, and the cross section of the limiting groove 432 is crescent; two locking bolts 441 all push against the area of the limiting groove 432, when the crescent limiting groove 432 can ensure that the eccentric sleeve 43 rotates to any position, the two locking bolts 441 can lock the eccentric sleeve to prevent the eccentric sleeve from rotating unnecessarily, and therefore the clamping accuracy of the clamping jaw on a workpiece is ensured.

When the roller 42 needs to be adjusted, the locking bolt 441 only needs to be loosened, and the adjusting block 431 is rotated to adjust the eccentric sleeve 43, so that the clamping precision can be adjusted; the locking bolt 441 only plays a role of preventing the eccentric sleeve from rotating, when a workpiece is clamped, the bearing capacity of the rolling shaft 42 acts on the matching surface of the eccentric sleeve 43 and the head end of the clamping jaw 4, the original point support is changed into surface support, and when the clamping jaw is clamped and loosened, larger bearing capacity can be borne without deformation.

(example 2)

Referring to fig. 12 to 15, the structure of the present embodiment is substantially the same as that of embodiment 1, except that: in the embodiment, the number of the clamping jaws 4 is four, four clamping jaws 4 are symmetrical in pairs, namely two pairs of clamping jaws 4, and a height difference is formed between every two adjacent clamping jaws 4 to ensure that the actions of the clamping jaws do not interfere with each other, for example, a pair of high-position clamping jaws 4a and a pair of low-position clamping jaws 4 b; the drive mechanisms 5 are provided in two, each drive mechanism 5 being adapted to drive a pair of jaws, the two drive mechanisms being independent of each other, e.g. the first drive mechanism 5a driving the high-position jaw 4a and the second drive mechanism 5b driving the low-position jaw 4 b. The utility model discloses press from both sides tight positioning accuracy height, repeated positioning accuracy is high, the reliable and stable characteristic of clamping-force, two liang of linkages of jack catch, the centre gripping scope is big, and the jack catch can quick adjustment and accurate location, adapts to the tubular product of processing different specifications, and adaptability is good.

It should be noted that the first flange 52a of the first driving mechanism 5a is located below the second flange 52b of the second driving mechanism 5b, and in order to ensure that the two driving mechanisms can work independently and do not interfere with each other, the second flange 52b is provided with two through holes 54, and the arc-shaped guide groove 521 on the first flange 52a is located in the area of the through holes 54; and the first flange 52a is provided with an arc displacement slot 55, and the structure of the arc displacement slot 55 is consistent with the motion track of the second flange 52b, so that the second driving shaft in the second driving mechanism 5b passes through the arc displacement slot 55 and is fixedly connected with the second flange 52 b.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A direct drive chuck, comprising: comprises a base (1), a chuck (2) and a direct-drive torque motor (3); the direct-drive torque motor (3) is arranged on the base (1); the chuck (2) is fixed on an output shaft of the direct-drive torque motor (3).

2. A direct drive chuck according to claim 1, wherein: the direct-drive torque motor (3) comprises

A housing (31) fixed to the base (1);

a stator (32) provided on the housing (31);

a rotor (33) connected to or integral with the output shaft;

and an encoder (34) provided on the stator (32) for detecting rotation information of the rotor and feeding back a position of rotation of the chuck (2).

3. A direct drive chuck according to claim 1, wherein: the end surface of the chuck (2) is provided with at least one pair of jaws (4) which are symmetrically arranged; and a driving mechanism (5) for driving the clamping jaws (4) to move is arranged in the chuck (2).

4. A direct drive chuck according to claim 3, wherein: the height difference is formed between any two different pairs of claws (4).

5. A direct drive chuck according to claim 3, wherein: the number of the driving mechanisms (5) is at least one, and one driving mechanism (5) can drive one or more than one clamping jaws (4) to move.

6. A direct drive chuck according to claim 3, wherein: the driving mechanism (5) comprises

At least two sliding blocks (51) which are connected with the chuck (2) in a sliding way and used for installing the clamping jaws (4), wherein one end of the bottom of each sliding block (51) is provided with a guide shaft (511), and the number of the sliding blocks (51) is the same as that of the clamping jaws (4);

a flange (52) under the slider (51), the flange (52) having an arc-shaped guide slot (521) and an arc-shaped receiving slot (522), the guide shaft (511) being disposed in the arc-shaped guide slot (521);

a power source (53) which is arranged below the flange (52), one end of the power source (53) is provided with a limit shaft (531), and the other end is provided with a driving shaft (532); the limiting shaft (531) is arranged in the arc-shaped containing groove (522), and the driving shaft (532) is arranged on the end face of the flange (52).

7. A direct drive chuck according to claim 3, wherein: the clamping jaw (4) comprises

The clamping sleeve (41) is arranged on the sliding block (51), one end of the clamping sleeve (41) is provided with a clamping groove (411), and two opposite groove walls of the clamping groove (411) are provided with insertion holes;

the pin shaft (45) is arranged in the clamping groove (411), and two opposite ends of the pin shaft (45) are respectively arranged in the two inserting holes;

a rolling shaft (42) sleeved on the pin shaft (45);

two eccentric sleeves (43); are respectively sleeved on the two opposite ends of the pin shaft (45) and are both positioned in the jack.

8. A direct drive chuck according to claim 7, wherein: the clamping sleeve (41) is provided with two locking holes (44) communicated with the jack, the two locking holes (44) are respectively arranged on two sides of the jack and are arranged oppositely, locking bolts (441) are arranged in the two locking holes (44), and the two locking bolts (441) tightly push the eccentric sleeve (43).

9. A direct drive chuck according to claim 8, wherein: a limiting groove (432) is formed in the eccentric sleeve (43), and the cross section of the limiting groove (432) is crescent; the two locking bolts (441) are both supported in the area of the limiting groove (432).

10. A direct drive chuck according to claim 7, wherein: one end of the eccentric sleeve (43) is provided with an adjusting block (431), and the adjusting block (431) is positioned outside the cutting sleeve (41).