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CN-224222764-U - Chuck fixture and machine tool

CN224222764UCN 224222764 UCN224222764 UCN 224222764UCN-224222764-U

Abstract

The utility model discloses a chuck fixture and a machine tool, which comprise a chuck, a clamping jaw driving mechanism and a clamping jaw driving mechanism, wherein the chuck is provided with a plurality of clamping jaws, the clamping jaw driving mechanism is provided with a guide structure matched with the clamping jaws, the clamping jaw driving mechanism is arranged at the bottom of the clamping jaws and comprises a driving assembly, a lifting block and a plurality of rocker arm parts corresponding to the clamping jaws, the rocker arm parts are hinged to a rocker arm mounting seat, the rocker arm mounting seat is connected to the chuck, the rocker arm parts are provided with a first rocker arm and a second rocker arm, the plurality of rocker arm parts are positioned at the periphery of the lifting block, the first rocker arms of the plurality of rocker arm parts are in transmission matched connection with the lifting block, the second rocker arms of the plurality of rocker arm parts are in transmission matched connection with the corresponding clamping jaws, and the driving assembly drives the lifting block to lift, and the plurality of clamping jaws are driven to synchronously move along the guide structure through the rocker arm parts rotating around the rocker arm mounting seat. According to the technical scheme, even if the parts are worn to generate the open quantity, the clamping jaws still keep synchronous motion, the centering accuracy is not affected, and the device is suitable for long-term maintenance-free use.

Inventors

  • WU WEIJIE
  • FU JIAYU
  • ZHAI JIAWEI

Assignees

  • 广汽本田汽车有限公司
  • 广汽本田汽车研究开发有限公司

Dates

Publication Date
20260512
Application Date
20250508

Claims (10)

  1. 1. A chuck fixture, comprising: the chuck is provided with a plurality of clamping jaws, and is provided with a guide structure matched with the clamping jaws, and the guide structure extends along the radial direction of the chuck; Clamping jaw actuating mechanism set up in the bottom of clamping jaw, clamping jaw actuating mechanism include drive assembly, lifter and with a plurality of rocking arm parts that the clamping jaw corresponds, the rocking arm part articulates in the rocking arm mount pad, the rocking arm mount pad connect in chuck, the rocking arm part has first rocking arm and second rocking arm, a plurality of the rocking arm part is located the periphery of lifter, and a plurality of the first rocking arm of rocking arm part all with lifter transmission cooperation is connected, a plurality of the second rocking arm of rocking arm part is connected with the clamping jaw transmission cooperation that corresponds, the drive assembly drive lifter goes up and down, and through around rocking arm mount pad pivoted rocking arm part drives a plurality of clamping jaw along guide structure synchronous movement.
  2. 2. The chuck holder according to claim 1, wherein the lifting block has a plurality of first driving grooves provided on an outer circumferential surface thereof, the first driving grooves corresponding to the rocker members, and end portions of the first rocker arms of the rocker members are fitted into the first driving grooves.
  3. 3. The chuck fixture of claim 2, wherein the end of the first rocker arm is provided with a top fulcrum that mates with a top slot wall of the first drive slot and a bottom fulcrum that mates with a bottom slot wall of the first drive slot.
  4. 4. The chuck fixture according to claim 1, wherein the bottom end surface of the jaw is provided with a second driving groove, and an end portion of the second rocker arm of the rocker arm member is fitted into the second driving groove corresponding to the jaw.
  5. 5. The chuck fixture of claim 4, wherein the end of the second rocker arm is provided with an inner fulcrum that mates with an inner groove wall of the second drive groove and an outer fulcrum that mates with an outer groove wall of the second drive groove.
  6. 6. The chuck fixture of claim 1, wherein the drive assembly comprises a drive rod provided with an outer helical groove, the lifting block is provided with a drive rod hole, the drive rod passes through the drive rod hole, and the wall of the drive rod hole is provided with inner helical teeth in driving fit with the outer helical groove.
  7. 7. The chuck fixture of claim 6, wherein the chuck is provided with an inner cavity, the jaw drive mechanism is disposed in the inner cavity, an end cap closing the inner cavity is disposed at the bottom of the chuck, the drive rod is mounted on the end cap through a bearing seat, the drive rod is provided with a driven bevel gear, the chuck is provided with an operating rod extending into the inner cavity in a radial direction, and the operating rod is provided with a drive bevel gear in driving fit with the driven bevel gear.
  8. 8. The chuck holder according to claim 1, wherein the jaws are provided with a plurality of stages of clamping surfaces, the stages of clamping surfaces being radially arranged stepwise.
  9. 9. The chuck fixture as in claim 1, wherein the sidewall surfaces of the jaws are provided with guide grooves and the chuck is provided with guide teeth that mate with the guide grooves.
  10. 10. A machine tool comprising a chuck holder according to any one of claims 1 to 9.

Description

Chuck fixture and machine tool Technical Field The utility model is used in the field of machining, and particularly relates to a chuck clamp and a machine tool. Background The three-jaw chuck is one of clamps widely applied in the field of machining, and has the core function of realizing quick centering and clamping of a circular or symmetrical workpiece through three symmetrically distributed clamping jaws. In the prior art, three clamping jaws of a chuck are generally driven synchronously through threads, so that the center of a workpiece is ensured to coincide with the axis of a main shaft of a machine tool. With the increase of service life, the key parts in the chuck generate accumulated abrasion due to high-frequency friction, so that transmission gaps are increased, and particularly, synchronous movement accuracy of clamping jaws is reduced due to abrasion of thread tooth profile, and three clamping jaws generate tiny position deviation during clamping, so that automatic centering performance is affected. In view of the above, there is a need to solve the problems in the related art. Disclosure of utility model The utility model aims to at least solve one of the technical problems in the prior art and provides a chuck clamp and a machine tool. The technical scheme adopted for solving the technical problems is as follows: in a first aspect, a chuck fixture comprises: the chuck is provided with a plurality of clamping jaws, and is provided with a guide structure matched with the clamping jaws, and the guide structure extends along the radial direction of the chuck; Clamping jaw actuating mechanism set up in the bottom of clamping jaw, clamping jaw actuating mechanism include drive assembly, lifter and with a plurality of rocking arm parts that the clamping jaw corresponds, the rocking arm part articulates in the rocking arm mount pad, the rocking arm mount pad connect in chuck, the rocking arm part has first rocking arm and second rocking arm, a plurality of the rocking arm part is located the periphery of lifter, and a plurality of the first rocking arm of rocking arm part all with lifter transmission cooperation is connected, a plurality of the second rocking arm of rocking arm part is connected with the clamping jaw transmission cooperation that corresponds, the drive assembly drive lifter goes up and down, and through around rocking arm mount pad pivoted rocking arm part drives a plurality of clamping jaw along guide structure synchronous movement. With reference to the first aspect, in some implementations of the first aspect, a plurality of first driving grooves corresponding to the rocker arm members are provided on an outer peripheral surface of the lifting block, and an end portion of the first rocker arm of the rocker arm member is fitted into the first driving grooves. With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, an end portion of the first rocker arm is provided with a top fulcrum that is matched with a top groove wall of the first driving groove and a bottom fulcrum that is matched with a bottom groove wall of the first driving groove. With reference to the first aspect and the foregoing implementation manner, in some implementation manners of the first aspect, a bottom end surface of the clamping jaw is provided with a second driving groove, and an end portion of a second rocker arm of the rocker arm component is embedded in the second driving groove corresponding to the clamping jaw. With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, an end portion of the second rocker arm is provided with an inner fulcrum that is matched with an inner groove wall of the second driving groove and an outer fulcrum that is matched with an outer groove wall of the second driving groove. With reference to the first aspect and the foregoing implementation manner, in certain implementation manners of the first aspect, the driving assembly includes a driving rod, the driving rod is provided with an outer spiral groove, the lifting block is provided with a driving rod hole, the driving rod passes through the driving rod hole, and a hole wall of the driving rod hole is provided with an inner spiral tooth in transmission fit with the outer spiral groove. With reference to the first aspect and the foregoing implementation manner, in certain implementation manners of the first aspect, the chuck is provided with an inner cavity, the jaw driving mechanism is disposed in the inner cavity, an end cover for sealing the inner cavity is disposed at the bottom of the chuck, the driving rod is mounted on the end cover through a bearing seat, the driving rod is provided with a driven bevel gear, the chuck is provided with an operating rod extending into the inner cavity along a radial direction, and the operating rod is provided with a drive bevel gear matche