TW201827156A - Centering clamping device comprises a base, a clamping module, and a driving module - Google Patents

Abstract

The centering clamping device comprises a base, a clamping module, and a driving module. The base comprises a base body, which is provided with a central shaft. The clamping module comprises two first clamping jaw units that are oppositely arranged, and two second clamping jaw units that are oppositely arranged. Each first clamping jaw unit is provided with a first clamping jaw. Each second clamping jaw unit is provided with a second clamping jaw. The driving unit comprises a first rotating disc, a second rotating disc, two first driving units, and two second driving units. The first driving unit drives the first rotating disc to drive the first clamping claw of the first clamping claw unit to move towards the center axis direction. The second driving unit drives the second rotating disc to drive the second clamping claw of the second clamping claw unit to move in the direction of the central axis, so that the workpiece is clamped and fixed on the central shaft through the first clamping jaw and the second clamping jaw.

Description

Centering clamping device

The present invention relates to a workpiece holding device, and more particularly to a centering clamping device.

As shown in FIG. 1 and FIG. 2 , a centering clamping device 1 includes a spindle 11 , a turntable 12 pivotally mounted on the spindle 11 , four disposed on the spindle 11 and capable of driving the turntable 12 to rotate. The cylinder 13 and the four movable jaws 14 and the guide blocks 15 respectively connected to the movable claws 14 respectively have two eccentric arc grooves 121 respectively disposed at both ends and symmetric with each other, the turntable 12 The center of the circle is the point of symmetry of the eccentric arcuate slots 121. The movable jaws 14 are disposed in opposite directions, and one end of the guide block 15 to which the two oppositely disposed movable jaws 14 are connected will The eccentric arc grooves 121 are respectively slidably connected to one of the turntables 12, and the other end portions of the guide blocks 15 to which the movable claws 14 are disposed are slidably connected to the eccentric circular arc grooves 121 of the other turntable 12.

During operation, two of the cylinders 13 will push one of the turntables 12 to rotate, and the turntable 12 will force the guide blocks 15 that are slidably connected to the eccentric arcuate slots 121 of the turntable 12 to move with the guide blocks. 15 connecting two movable jaws 14 respectively move in the radial direction, and the other two cylinders 13 will push the other turntable 12 to rotate, and in the same manner, the other two movable claws 14 are respectively moved in the radial direction, thereby being Positioning a workpiece to be processed at a center position, however, since it is difficult to process the eccentric arc grooves 121 of each turntable 12 with a center of symmetry, when the eccentric arc grooves 121 are formed, When the precision is insufficient, it is easy to cause the eccentric arc grooves 121 to be asymmetrical, or the symmetry points of the eccentric arc grooves 121 are not at the center of the circle, and the relative movement of the movable claws 14 in the radial direction is relatively long. Inconsistent, the workpiece cannot be positioned at the center.

As shown in FIGS. 3 and 4, another centering clamping device 2 includes a chuck body 21, a first jaw group 22, a second jaw group 23, a first driving mechanism group 24, and a second driving mechanism group 25, the first claw group 22 includes a first claw 221 and a second claw 222 disposed oppositely, the second claw group 23 includes a third claw 231, and a fourth claw 232, the first driving mechanism group 24 includes a first large toothed disc 241, a first scroll motor 242 disposed on the chuck body 21, and a second disposed on the chuck body 21. a scroll motor, a first slider 243 for the first claw 221, and a second slider 244 for the second claw 222, the second drive mechanism 25 includes a second large chainring a third scroll motor 252 disposed on the chuck body 21, a fourth scroll motor disposed on the chuck body 21, and a third slider 253 disposed on the third claw 231, and A fourth slider 254 is provided for the fourth claw 232. The first, second, third and fourth sliders 243, 244, 253, 254 are provided with racks on both sides.

In operation, the first scroll motor 242 and the second scroll motor jointly rotate the first large toothed disc 241 by rotating teeth, and the first large toothed disc 241 drives the first and second sliders 243 with a gear set. The first and second jaws 221 and 222 disposed on the first and second sliders 243 and 244 are relatively moved, and the third scroll motor 252 is shared with the fourth scroll motor. The second large toothed disc 251 is rotated by the rotating tooth, and the second large toothed disc 251 drives the third and fourth sliding blocks 253 and 254 to move relative to each other by the gear set, so as to be disposed on the third and fourth sliding blocks 253, The third and fourth jaws 231, 232 on the 254 are relatively moved, so that a workpiece to be processed can be positioned at a center position. However, since the scroll motor is expensive and bulky, the When the first scroll motor 242 and the second scroll motor drive the first large toothed disc 241 with the rotating teeth, the rotating teeth that mesh with the first large toothed disc 241 are easily broken due to the asynchronous movement. Similarly, the third scroll motor 252 and the fourth scroll motor also drive the second large toothed disc 251 with the rotating teeth. Like problem, so that the conventional centering device 2 is not only more space, easy to maintain and not easily damaged.

Accordingly, it is an object of the present invention to provide a clamping device that is quasi-determined, small in size, and less susceptible to damage.

Therefore, the centering clamping device of the present invention comprises a base, a clamping module, and a driving module.

The base includes a body defining a body having a central axis, a first axis orthogonally passing the central axis, and a second axis orthogonally passing the central axis.

The clamping module includes two first jaw units disposed opposite to the seat body, and two second jaw units disposed opposite to the seat body, each first jaw unit having a first axis along the first axis Moving first jaws, each second jaw unit having a second jaw movable along a second axis.

The driving module includes a first rotating wheel rotatably disposed around the central axis, a second rotating wheel rotatably disposed around the central axis, two first driving units, and two second a driving unit, two first gears pivoted to the base body, and two second gears pivotally mounted on the base body, each first driving unit being connected between the seat body and the first turntable, and having a The first pressure cylinder and a first piston rod are connected between the base body and the second turntable, and have a second pressure cylinder and a second piston rod. The first driving unit can drive the first rotating wheel to rotate, and the first rotating wheel drives the first clamping jaws to synchronously reciprocate along the first axis along the first axis by the first gears. The second driving unit can drive the second rotating wheel to rotate, and the second rotating wheel respectively drives the second clamping jaws to reciprocate relative to the central axis along the second axis by the second gears.

The effect of the present invention is that the first rotating gear drives the first gears to drive the first jaws of the first jaw units to move, and the second rotating wheels drive the second gears to drive the second The movement of the second jaw of the jaw unit can easily control the strokes of the first jaws and the second jaws in a gear-driven manner, so that a workpiece to be processed can be accurately positioned. Further, in the present invention, the first cylinder and the second cylinder of the second driving unit drive the first and second rotating wheels by using the first cylinders of the first driving units, and the first and second rotating wheels are used. The scroll motor is not only cheaper, but also smaller in size and does not cause gear collapse due to unsynchronized movement.

As shown in FIGS. 5-7, an embodiment of the centering clamping device of the present invention includes a base 4, a clamping module 5, and a driving module 6.

The base 4 includes a body 41 defining a central body X having a central axis X, a first axis L1 orthogonally passing through the central axis X, and a second axis L2 orthogonally passing through the central axis X, In this embodiment, the first axis L1 and the second axis L2 are perpendicular to each other.

The clamping module 5 includes two first jaw units 51 disposed opposite to the base body 41 and two second jaw units 52 disposed opposite to the base body 41.

Each of the first jaw units 51 has a first slide rail 511 disposed on the base body 41, a first slider 512 movably disposed on the first slide rail 511, and a first slider disposed on the first slider a first jaw 513 of 512 and a first rack 514 disposed on the first slider 512. The first slider 512 has a first side 515 disposed away from the base 41 and disposed by the first jaw 513. The first jaw 513 has a first side 515 connected to the first axis 515 along the first axis L1. An extended first connecting section 516, a first clamping section 517 extending from an end of the first connecting section 516 adjacent to the central axis X toward a direction away from the housing 41, and a first clamping section disposed at the first clamping section The first clamping block 518 of the first clamping portion 516 has a first clamping portion 517 of the first clamping portion 516. The first clamping portion 517 of the first clamping jaw 513 has a first clamping surface 519 adjacent to the central axis X. A clamping block 518 partially protrudes from the first clamping surface 519. The first rack 514 of each of the first jaw units 51 extends in the direction of the first axis L1, and the second rack 524 of each second jaw unit 52 extends in the direction of the second axis L2.

Each of the second jaw units 52 has a second slide rail 521 disposed on the base body 41, a second slider 522 movably disposed on the second slide rail 521, and a second slider 522 disposed on the second slider The second jaw 523 of the 522 and a second rack 524 disposed on the second slider 522. The second slider 522 has a second side 525 disposed away from the base 41 and disposed by the second jaw 523. The second jaw 523 has a second side 525 connected to the second side 525 and along the second axis L2. An extended second connecting portion 526, a second clamping portion 527 extending from an end of the second connecting portion 526 adjacent to the central axis X toward the remote body 41, and a second clamping portion disposed at the second clamping portion The segment 527 is away from the second clamping block 528 at one end of the second connecting segment 526, and the second clamping segment 527 of the second clamping jaw 523 has a second clamping surface 529 adjacent to the central axis X. The second clamping block 528 partially protrudes from the second clamping surface 529.

The driving module 6 includes a first turntable 61 rotatably disposed around the central axis X, and a second turntable 62 rotatably disposed around the central axis X. A driving unit 63, two second driving units 64, two first gears 65 pivoted on the base 41, and two second gears 66 pivotally mounted on the base 41. The first turntable 61 has a first rotating tooth portion 611 disposed around the second rotating shaft portion 621. The second rotating portion 62 has a circumferentially disposed second rotating tooth portion 621. Each of the first driving units 63 is coupled to the base 41 and the first rotating portion 61. The first driving unit 63 has a first cylinder 631 disposed on the base 41, and a first portion disposed on the first cylinder 631 and operatively connected to the first dial 61. a piston rod 632, each of the second driving units 64 is connected between the base body 41 and the second rotating plate 62. The second driving unit 64 has a second pressure cylinder 641 disposed on the base body 41, and a a second piston rod 642 disposed on the second pressure cylinder 641 and operatively coupled to the second turntable 62. Each of the first gears 65 has an input that engages with the first rotating tooth portion 611 of the first turntable 61. a gear portion 651, and an output gear portion 652 that meshes with the first rack 514 of each of the first jaw units 51, each of the second gears 66 has a second tooth portion that is engaged with the second turntable 62 The input gear portion 661 of the 621 and an output gear portion 662 of the second rack 524 that are engaged with the respective second jaw units 52. In the present embodiment, the first cylinder 631 of each of the first driving units 63 is a hydraulic cylinder, and the second cylinder 641 of each second driving unit 64 is a hydraulic cylinder.

The first cylinder 631 of the first driving unit 63 can drive the first piston rod 632 to move. The first piston rod 632 of the first driving unit 63 drives the first rotating disc 61 to rotate. The first rotating disc 61 rotates. When the first torsion portion 611 is engaged with the input gear portion 651 of the first gears 65, the first gears 65 are driven to rotate, and the output gear portions 652 of the first gears 65 are engaged by the output gear portions 652. The first rack 514 of the first jaw unit 51, and the first sliders 512 respectively connected to the first racks 514 are synchronously reciprocated along the first axis L1 with respect to the central axis X. Further, the first jaws 513 disposed on the first sliders 512 are reciprocally moved synchronously with respect to the central axis X along the first axis L1. Similarly, the second cylinder 641 of the second driving unit 64 can drive the second piston rod 642 to move, and the second piston rod 642 of the second driving unit 64 can drive the second rotating wheel 62 to rotate. When the second turntable 62 rotates, the second gear portion 621 is engaged with the input gear portion 661 of the second gear 66 to drive the second gear 66 to rotate, and the output gears of the second gear 66 are driven. The portion 662 is engaged with the second rack 524 of the second jaw unit 52, and the second sliders 522 respectively connected to the second racks 524 are opposite to the central axis X along the second axis L2. The reciprocating movement is performed to reciprocate the second jaw 523 disposed on the second slider 522 along the second axis L2 in synchronization with the central axis X.

Thus, when the first jaws 513 are synchronously moved along the first axis L1 toward the central axis X, and the second jaws 523 are synchronously moved along the second axis L2 toward the central axis X, A workpiece to be processed is collectively positioned on the central axis X by the first and second clamping blocks 518, 528.

After the above description, the advantages of the present invention are summarized as follows:

1. The first jaws 513 are driven by the first dial 61 to drive the first gears 65 to drive the first sliders 512, and the second jaws 523 are utilized by the second dials 62. The second gears 66 are driven to drive the second sliders 522 to move. Compared with the conventional centering clamping device 1, the strokes of the two oppositely disposed jaws are not relative to the center. Synchronizing, so that the workpiece is not accurately determined when the workpiece is clamped, the present invention can easily control the strokes of the first jaws 513 and the second jaws 514 to be synchronized with respect to the central axis X, respectively, in a gear-driven manner. Position the workpiece on the central axis X.

2. The present invention utilizes the first and second piston rods 632, 641 for the hydraulic cylinders to push the first and second piston rods 632, 642 to drive the first and second rotary tables 61, 62 to rotate. The conventional centering clamping device 2 uses a scroll motor as an output device, and the first and second pressure cylinders 631 and 641 used in the present invention are not only inexpensive but also small in size, and are not like this. It is known that the centering clamp 2 causes the rotating teeth of the rotating shaft to be disintegrated due to the unsynchronized actuation of the scroll motor on both sides.

In summary, the centering clamping device of the present invention can not only accurately determine the core, is small in size, and is not easily damaged, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

4‧‧‧Base

41‧‧‧ body

5‧‧‧Clamping module

51‧‧‧First jaw unit

511‧‧‧First slide rail

512‧‧‧first slider

513‧‧‧First jaw

514‧‧‧first rack

515‧‧‧ first side

516‧‧‧First connection segment

517‧‧‧First clamping section

518‧‧‧First clamping block

519‧‧‧First clamping surface

52‧‧‧Second jaw unit

521‧‧‧Second rail

522‧‧‧Second slider

523‧‧‧second jaw

524‧‧‧second rack

525‧‧‧ second side

526‧‧‧Second connection

527‧‧‧Second clamping section

528‧‧‧Second clamping block

529‧‧‧Second clamping surface

6‧‧‧Drive Module

61‧‧‧First turntable

611‧‧‧First toothing

62‧‧‧Second turntable

621‧‧‧second toothing

63‧‧‧First drive unit

631‧‧‧First pressure cylinder

632‧‧‧First piston rod

64‧‧‧Second drive unit

641‧‧‧Second pressure cylinder

642‧‧‧Second piston rod

65‧‧‧First gear

651‧‧‧Input gear section

652‧‧‧Output gear department

66‧‧‧second gear

661‧‧‧Input gear section

662‧‧‧Output gear section

X‧‧‧ central axis

L1‧‧‧first axis

L2‧‧‧second axis

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a front view of a conventional centering clamp; Figure 2 is the conventional centering clamp Figure 3 is a top plan view of another conventional centering clamping device; Figure 4 is a perspective view of the conventional centering clamping device; Figure 5 is a centering clamping device of the present invention A perspective view of an embodiment of the embodiment; FIG. 6 is an incomplete front view of the embodiment; and FIG. 7 is an incomplete perspective view of the embodiment.

Claims (10)

A centering clamping device comprising: a base comprising a body defining a body having a central axis, a first axis orthogonally passing the central axis, and an orthogonal through the central axis a second axis; a clamping module comprising two first jaw units disposed opposite to the base body, and two second jaw units disposed opposite to the base body, each of the first jaw units having a a first jaw moving along the first axis, each second jaw unit having a second jaw movable along a second axis; and a drive module including a rotatably disposed about the central axis a first rotating wheel of the base body, a second rotating wheel rotatably disposed around the central axis, two first driving units, two second driving units, and two first gears pivotally mounted on the base body, And a second gear pivoted to the base body, each first driving unit is connected between the seat body and the first turntable, and has a first pressure cylinder and a first piston rod, each second The driving unit is connected between the seat body and the second turntable, and has a second pressure cylinder and a a second piston rod, whereby the first driving unit can drive the first rotating wheel to rotate, the first rotating wheel respectively drives the first clamping jaws to be synchronized with the central axis along the first axis by the first gears Reciprocatingly, the second driving unit can drive the second rotating wheel to rotate, and the second rotating wheel respectively drives the second clamping jaws to reciprocate along the second axis along the second axis by the second gears. The centering clamp device of claim 1, wherein each of the first jaw units further has a first slide rail disposed on the seat body, and a first movably disposed on the first slide rail a slider, and a first rack disposed on the first slider, each second jaw unit further has a second slide rail disposed on the base body, and a second slide rail movably disposed on the second slide rail a second slider, and a second rack disposed on the second slider. The centering clamping device of claim 2, wherein the first dial has a circumferentially disposed first toothing portion, and the second dial has a circumferentially disposed second rotating tooth portion. The centering clamping device of claim 3, wherein each of the first gears has an input gear portion that meshes with the first torsion portion of the first dial and engages with the respective first jaw unit An output gear portion of the first rack, each of the second gears has an input gear portion that meshes with the second tooth portion of the second turntable and a second rack that is engaged with the respective second jaw unit Output gear section. The centering clamping device of claim 2, wherein the first slider of each first jaw unit has a first side away from the seat body, and the first jaw is disposed on the first side, The second slider of each second jaw unit has a second side away from the seat body, and the second jaw is disposed on the second side. The centering clamping device of claim 5, wherein the first jaw of each first jaw unit has a first connecting section connected to the first side and extending along the first axis, and a a second clamping segment extending from an end of the first connecting section adjacent to the central axis toward a direction away from the housing body, and the second clamping jaw of each second clamping unit has a second side and a second side a second connecting section extending from the second axis, and a second clamping section extending from an end of the second connecting section adjacent to the central axis toward a direction away from the base. The centering clamping device of claim 6, wherein the first jaw of each first jaw unit further has a first portion disposed at an end of the first clamping segment away from the first connecting segment The clamping block, the second clamping jaw of each second clamping unit further has a second clamping block disposed at an end of the second clamping segment away from the second connecting segment. The centering clamping device of claim 7, wherein the first clamping segment of the first jaw of each first jaw unit has a first clamping surface adjacent the central axis, each second a second clamping section of the second jaw of the jaw unit has a second clamping surface adjacent to the central axis, the first clamping block portion protrudes from the first clamping surface, the second clamping block A portion protrudes from the second clamping surface. The centering clamp of claim 1, wherein the first axis and the second axis are perpendicular to each other. The centering clamping device of claim 1, wherein the first cylinder of each first driving unit is a hydraulic cylinder, and the second cylinder of each second driving unit is a hydraulic cylinder.