CN221246979U - Synchronous driving device for front chuck - Google Patents

Abstract

The utility model discloses a synchronous driving device for a front chuck, and belongs to the technical field of chucks. The driving device includes: the device comprises four force doubling cylinders arranged on a supporting component, four transition shafts which are rotatably arranged on the supporting component and are respectively meshed with the force doubling cylinders through gears and racks, an upper swing arm which is fixedly arranged at the top of each transition shaft and is suitable for driving two clamping components which are oppositely arranged to move oppositely and back to back, and a first synchronizing ring and a second synchronizing ring which coaxially rotate on the supporting component and are respectively meshed with the two transition shafts which are oppositely arranged. The synchronous driving device provided by the utility model has the advantages that the gear rack is directly pushed by the double-force cylinder, the gear rack pushes the sector gear, the sector gear drives the transition shaft and the upper swing arm, the upper swing arm pushes the clamping assembly to move, the instantaneous transmission ratio is constant, the work is stable, the transmission is accurate and reliable, and the chuck precision is improved.

Description

Synchronous driving device for front chuck

Technical Field

The utility model belongs to the technical field of chucks, and particularly relates to a synchronous driving device for a front chuck.

Background

And (3) processing various metal pipe materials and sectional materials, and widely adopting professional laser pipe cutting machines or plate and pipe integrated machines. Further concerns for the user are clamping force stability during machining, reliability, workpiece machining accuracy, and workability of various pipes and profiles. The clamping part of chuck before traditional air-powered mainly centre gripping pipe, side pipe and rectangular pipe, but the kind of tubular product section bar of centre gripping is few, and when the section bar of chuck centre gripping different sizes size moreover, unable full stroke of accomplishing needs manual switching stroke.

Through retrieving, CN 216801741U discloses a chuck jack catch synchronous drive device, through set up supporting component at chuck body rear end to for first synchronizer ring and second synchronizer ring provide rotation support respectively, compare in prior art, do not receive the influence of chuck centre bore and rotation cover shape, can satisfy square hole and other dysmorphism Kong Kapan's jack catch synchronous motion demand, the commonality is good. However, the patent adopts a connecting rod transmission, the inertia force is difficult to eliminate in the transmission process, and the precision of the chuck is low.

Disclosure of utility model

In order to overcome the technical defects, the utility model provides a synchronous driving device for a front chuck, which aims to solve the problems related to the background technology.

The utility model provides a synchronous driving device for a front chuck, comprising: the front chuck comprises a chuck body, four groups of clamping assemblies are arranged at the front end of the chuck body and uniformly distributed along the circumferential direction of the chuck body, and a supporting assembly is fixedly arranged at the rear end of the chuck body; characterized in that the driving device comprises: the device comprises four force doubling cylinders arranged on a supporting component, four transition shafts which are rotatably arranged on the supporting component and are respectively meshed with the force doubling cylinders through gears and racks, an upper swing arm which is fixedly arranged at the top of each transition shaft and is suitable for driving two clamping components which are oppositely arranged to move oppositely and back to back, and a first synchronizing ring and a second synchronizing ring which coaxially rotate on the supporting component and are respectively meshed with the two transition shafts which are oppositely arranged.

Preferably or alternatively, the support assembly includes a mounting seat and a spacing post disposed between the mounting seat and the chuck body adapted to mount the first and second synchronizing rings.

Preferably or optionally, the inner ring of the limit post is of a square hollow structure; the upper part of the outer ring of the limit column is round and is connected with the first synchronous ring and the second synchronous ring through bearings.

Preferably or optionally, the lower part of the outer ring of the limit post is square, each side face is provided with a guide rail, and a rack connected with the double-force cylinder is arranged on the guide rail in a sliding manner;

the output direction of the force doubling cylinder is parallel to the arrangement direction of the guide rail.

Preferably or alternatively, the transition shaft is fixedly provided with two transition gears, one of which is engaged with the rack and the other of which is engaged with the first or second synchronizing ring.

Preferably or alternatively, the transition gear is a sector gear, and the sector gear is disposed on a side close to the limit post.

Preferably or optionally, the outer ring of the first synchronizing ring or the second synchronizing ring is provided with four sections of gear grooves.

Preferably or alternatively, the clamping assembly comprises a linear guide rail arranged on the chuck body, and a clamping block which is slidably clamped on the linear guide rail.

Preferably or optionally, one end of the upper swing arm is fixedly connected with the top of the transition shaft, and the other end of the upper swing arm is provided with a through hole;

and the bolts penetrate through the through holes and are fixedly arranged on the clamping blocks.

The utility model relates to a synchronous driving device for a front chuck, which has the following beneficial effects compared with the prior art: the synchronous driving device provided by the utility model has the advantages that the gear rack is directly pushed by the double-force cylinder, the gear rack pushes the sector gear, the sector gear drives the transition shaft and the upper swing arm, the upper swing arm pushes the clamping assembly to move, the instantaneous transmission ratio is constant, the work is stable, the transmission is accurate and reliable, and the chuck precision is improved.

Drawings

Fig. 1 is a schematic view of the structure of the front chuck in the present utility model.

Fig. 2 is a schematic side view of a front chuck in accordance with the present utility model.

Fig. 3 is a schematic diagram of a driving device according to the present utility model.

Fig. 4 is a schematic diagram of a driving device according to a second embodiment of the present utility model.

The reference numerals are: 100. a chuck body;

200. a clamping assembly; 210. a linear guide rail; 220. a clamping block;

300. A support assembly; 310. a mounting base; 320. a limit column; 321. an inner ring; 322. an outer ring;

400. A driving device; 410. a force doubling cylinder; 420. a transition shaft; 421. a transition gear; 430. an upper swing arm; 440. a first synchronization ring; 441. a gear groove; 450. a second synchronizing ring; 411. a guide rail; 412. a rack.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the utility model.

Referring to fig. 1-4, the present embodiment provides a synchronous driving device 400 for a front chuck, where the front chuck includes a chuck body 100 and four groups of clamping assemblies 200 disposed at the front end of the chuck body 100 and uniformly distributed along the circumferential direction of the chuck body 100, and a support assembly 300 is fixedly mounted at the rear end of the chuck body 100; the support assembly 300 comprises a mounting seat 310, a limit post 320 arranged between the mounting seat 310 and the chuck body 100, and a shell arranged between the mounting seat 310 and the chuck body 100 and positioned outside the limit post 320, wherein an inner ring 321 of the limit post 320 is of a square hollow structure; the upper portion of the outer ring 322 of the limiting post 320 is circular, and the lower portion of the outer ring 322 of the limiting post 320 is square. The inner ring 321 of the limiting post 320 is designed into a square hole, the types of the pipe profiles which can be clamped are more in a square-round combination mode, and the inner hole of the bearing seat is designed into a round hole, so that the tool is convenient to install, the circle is measured, and the clamping assembly 200 is easy to debug.

In addition, the limit post 320, the housing, the mounting base 310, and the chuck body 100 form an annular closed space, and the driving device 400 is disposed in the closed space. The driving apparatus 400 includes: four force multiplying cylinders 410, four transition shafts 420, four upper swing arms 430, a first synchronizing ring 440, and a second synchronizing ring 450. The force doubling cylinder 410 is disposed on the mounting base 310, and is respectively engaged with the force doubling cylinder 410 through a rack and pinion 412, the four upper swing arms 430 are respectively and fixedly mounted on the top of the transition shaft 420, and are adapted to drive two oppositely disposed clamping assemblies 200 to move in opposite directions and move in opposite directions, the first synchronization ring 440 and the second synchronization ring 450 coaxially rotate on the support assembly 300, and the first synchronization ring 440 and the second synchronization ring 450 are respectively engaged with the two oppositely disposed transition shafts 420. The force doubling cylinder 410 drives the transition shaft 420 to rotate through the gear rack 412, and then drives the upper swing arm 430 to rotate, so that the movement of the clamping assembly 200 is realized. Meanwhile, the first synchronization ring 440 and the second synchronization ring 450 are mounted on the upper portion of the outer ring 322 of the limiting post 320 through bearings, the first synchronization ring 440 and the second synchronization ring 450 provide rotation support, are not affected by the shape of the center hole of the chuck and the rotating sleeve, and can meet the synchronous motion requirements of the clamping assembly 200 of square holes and other special-shaped Kong Kapan, and the universality is good.

In a further embodiment, the lower part of the outer ring 322 of the limiting post 320 is square, and each side surface is provided with a guide rail 411, and a rack 412 connected with the force doubling cylinder 410 is slidably arranged on the guide rail 411; the force doubling cylinder 410 is a force doubling cylinder, and the output direction of the force doubling cylinder 410 is parallel to the arrangement direction of the guide rail 411. By adopting the mode of direct pushing of the double-force cylinder, larger clamping force can be provided when a large workpiece is clamped, and when the workpiece is smaller in size, the clamping force is correspondingly smaller, so that the damage to the surface of the workpiece can be reduced.

In a further embodiment, the transition shaft 420 is fixedly provided with two transition gears 421, one of which is engaged with the rack 412 and the other of which is engaged with the first or second synchronizing ring 440 or 450; the transition gear 421 is a sector gear 412, and the sector gear 412 is disposed on a side close to the limiting post 320. The adoption of the sector gear 412 can save space, ensure accurate transmission ratio and ensure stable transmission effect so that the machine works more reliably.

In a further embodiment, since the contact position between the transition gear 421 and the first synchronizing ring 440 or the second synchronizing ring 450 is fixed, the outer ring 322 of the first synchronizing ring 440 or the second synchronizing ring 450 is provided with four sections of gear grooves 441, which can improve the structural strength of the whole first synchronizing ring 440 or the second synchronizing ring 450 and reduce the production cost. Of course, it will be apparent to those skilled in the art that the first synchronizer ring 440 or the second synchronizer ring 450 may be a commercially available common gear ring.

In a further embodiment, the clamping assembly 200 includes a linear guide 210 disposed on the chuck body 100, and a clamping block 220 slidably clamped on the linear guide 210. The upper swing arm 430 is driven to push and rotate along the transition shaft 420 by the force doubling cylinder 410, so that the sliding block of the linear guide rail 210 is driven to move, the movement of the clamping block 220 arranged on the linear guide rail 210 is realized, the transmission structure is stable, the movement of the clamping assembly 200 is smoother, the full stroke of 19-371 mm of the clamping assembly 200 can be realized, and the problems of difficult gear shifting and debugging of the clamping assembly 200 are avoided; specifically, one end of the upper swing arm 430 is fixedly connected with the top of the transition shaft 420, and the other end is provided with a through hole, and the through hole is preferably a waist-shaped hole; and the bolts are passed through the through holes and fixedly mounted on the fixture block 220. The rotation movement is changed to a linear movement along the linear guide rail 210 by the upper swing arm 430, and the clamping of the chuck is achieved by the two sets of clamping assemblies 200 in opposite directions.

In order to facilitate understanding of the technical scheme of the synchronous driving device 400 for front chuck, a brief description will be made of the working principle thereof: during operation, the force cylinder pushes the rack 412 to move along the guide rail 411, so that the transition shaft 420 and the upper swing arm 430 rotate through gear transmission, the rotation motion is changed into the linear motion along the linear guide rail 210 through the upper swing arm 430, and the clamping of the chuck is realized through two groups of clamping assemblies 200 in opposite directions. Meanwhile, the first synchronization ring 440 and the second synchronization ring 450 provide rotation support, are not affected by the shape of the center hole of the chuck and the shape of the rotation sleeve, and can meet the synchronous motion requirement of the clamping assembly 200 with square holes and other special-shaped Kong Kapan, and the universality is good.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.

Claims (9)

1. The synchronous driving device for the front chuck comprises a chuck body (100) and four groups of clamping assemblies (200) which are arranged at the front end of the chuck body (100) and uniformly distributed along the circumferential direction of the chuck body (100), wherein a supporting assembly (300) is fixedly arranged at the rear end of the chuck body (100); characterized in that the driving device (400) comprises: four double-force cylinders (410) arranged on the support assembly (300), four transition shafts (420) rotatably arranged on the support assembly (300) and respectively meshed with the double-force cylinders (410) through gear racks (412), upper swing arms (430) fixedly arranged at the tops of the transition shafts (420) and suitable for driving two clamping assemblies (200) oppositely arranged to move oppositely and reversely, and a first synchronizing ring (440) and a second synchronizing ring (450) coaxially rotated on the support assembly (300) and respectively meshed with the two transition shafts (420) oppositely arranged.

2. The synchronized driving device for a front chuck according to claim 1, wherein the supporting assembly (300) includes a mounting base (310), and a stopper post (320) disposed between the mounting base (310) and the chuck body (100) and adapted to mount the first and second synchronizing rings (440, 450).

3. The synchronous drive for the front chuck according to claim 2, wherein the inner ring (321) of the limit post (320) has a square hollow structure; the upper part of the outer ring (322) of the limit column (320) is round and is connected with the first synchronous ring (440) and the second synchronous ring (450) through bearings.

4. The synchronous drive (400) for a front chuck according to claim 2, wherein the lower part of the outer ring (322) of the limit post (320) is square, and is provided with a guide rail (411) on each side, and a rack (412) connected with the force doubling cylinder (410) is slidably provided on the guide rail (411);

the output direction of the force doubling cylinder (410) is parallel to the arrangement direction of the guide rail (411).

5. The synchronous drive for the front chuck according to claim 4, wherein the transition shaft (420) is fixedly provided with two transition gears (421), one of which is engaged with the rack (412) and the other of which is engaged with the first synchronizing ring (440) or the second synchronizing ring (450).

6. The synchronous drive for the front chuck according to claim 5, wherein the transition gear (421) is a sector gear, and the sector gear is disposed at a side close to the stopper post (320).

7. The synchronous drive (400) for a front chuck according to claim 1, wherein the outer ring (322) of the first or second synchronizing ring (440, 450) is provided with four gear grooves (441).

8. The synchronous drive for a front chuck according to claim 1, wherein the clamping assembly (200) comprises a linear rail (210) provided on the chuck body (100), and a clamping block (220) slidably clamped on the linear rail (210).

9. The synchronous drive for the front chuck according to claim 8, wherein one end of the upper swing arm (430) is fixedly connected to the top of the transition shaft (420), and the other end is provided with a through hole;

And a bolt is passed through the through hole and fixedly mounted on the fixture block (220).