CN110394471B - Reliable hub chuck - Google Patents
Reliable hub chuck Download PDFInfo
- Publication number
- CN110394471B CN110394471B CN201910758733.4A CN201910758733A CN110394471B CN 110394471 B CN110394471 B CN 110394471B CN 201910758733 A CN201910758733 A CN 201910758733A CN 110394471 B CN110394471 B CN 110394471B
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- CN
- China
- Prior art keywords
- hub
- rotating shaft
- arm
- chuck
- connecting arm
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/103—Retention by pivotal elements, e.g. catches, pawls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention discloses a reliable hub chuck, which solves the problems of complex motion track and low opening and closing reliability of a jaw, and the technical scheme for solving the problems mainly comprises the jaw and a moving sleeve with a moving rod, wherein a driving device drives the moving sleeve to reciprocate along the axial direction of a main shaft, a base disc synchronously rotating along the main shaft is sleeved on the outer side of the moving sleeve, the base disc is provided with an end face positioning piece for axially positioning a hub, the jaw comprises a grasping arm, a connecting arm and a connecting part for connecting the grasping arm and the connecting arm, the grasping arm tightly presses the hub on the end face positioning piece to clamp the hub, the connecting part is hinged with the base disc through a first rotating shaft, an intermediate rod is arranged between the moving rod and the connecting arm, one end of the intermediate rod is hinged with the connecting arm through a second rotating shaft, the other end of the intermediate rod is hinged with the moving rod through a third rotating shaft, the center distance between the second rotating shaft and the third rotating shaft is L2, the center distance between the first rotating shaft and the third rotating shaft is L3, wherein L1+ L2> L3.
Description
Technical Field
The invention relates to the technical field of machine manufacturing, in particular to a reliable hub chuck.
Background
The automobile hub is a cylindrical metal piece for supporting a tire, the main processing mode is that a semi-finished product of the hub is fixed on a chuck clamp, then the outer side face and the inner side face of the hub are turned, the chuck of a general lathe mainly clamps a workpiece along the radial direction of the chuck, the hub is clamped and deformed by overlarge clamping force, and in order to eliminate the damage of the clamp to the hub, the chuck for preventing the hub from deforming is provided in the prior art, the chuck comprises a chuck base, a pull disc and a clamping jaw, the clamping jaw clamps the hub along the axial direction, the radial deformation of the hub is avoided, but the clamping jaw is rotationally connected to the pull disc, the pull disc drives the clamping jaw to reciprocate in the axial direction, the size of the whole chuck in the axial direction is increased, the motion track of the whole clamping jaw is complex, the opening and closing reliability of the clamping jaw is low, in order, not only the weight of the chuck is increased, the overall dimension of the whole chuck is increased, but also the reliability of loading, unloading, opening and closing is low.
Disclosure of Invention
The invention aims to provide a reliable hub chuck, which has the advantages that the clamping and loosening of the clamping jaws are reliable and smooth, the axial size of the chuck is reduced, the internal structure of the chuck is simplified, and the weight of the whole chuck is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme: a reliable hub chuck comprises jaws and a movable sleeve with a movable rod, wherein a driving device drives the movable sleeve to reciprocate along the axial direction of a main shaft, a base disc synchronously rotating along the main shaft is sleeved outside the movable sleeve, the base disc is provided with an end face positioning piece for axially positioning a hub, the clamping jaw comprises a grasping arm, a connecting arm and a connecting part for connecting the grasping arm and the connecting arm, the grasping arm presses the hub on the end face positioning part to clamp the hub, the connecting part is hinged with the base disc through a first rotating shaft, an intermediate rod is arranged between the movable rod and the connecting arm, one end of the middle rod is hinged to the connecting arm through a second rotating shaft, the other end of the middle rod is hinged to the moving rod through a third rotating shaft, the center distance between the first rotating shaft and the second rotating shaft is L1, the center distance between the second rotating shaft and the third rotating shaft is L2, the center distance between the first rotating shaft and the third rotating shaft is L3, and L1+ L2> L3.
Further, the travel bar is axially located between the hub and the base plate.
Furthermore, the base plate is provided with a mounting groove for mounting the connecting arm to move towards the side of the hub, and the first rotating shaft is arranged on the side wall of the mounting groove.
Further, the length of the grasping arm in the radial direction of the first rotating shaft is larger than the length of the connecting arm in the radial direction of the first rotating shaft.
Furthermore, the included angle alpha between the grasping arm and the connecting arm is less than or equal to 150 degrees.
Furthermore, L3 is more than or equal to L1.
Furthermore, the end face positioning piece is arranged at the outer edge of the base plate, and the end face positioning piece and the base plate form an installation space for the end part of the hub to extend into.
Further, the moving rod is located in the installation space.
Furthermore, the middle part of the base disc is provided with a core fixing seat for radially positioning the hub, and the core fixing seat clamps the hole wall of the central hole of the hub along the radial direction of the hub.
Furthermore, the bottom of the core fixing seat is provided with a movable cavity for the movable sleeve and the movable rod to move in a reciprocating manner, the movable cavity is internally provided with a guide post extending in the axial direction, and the movable sleeve is arranged on the outer side of the guide post and is in sliding connection with the guide post.
After the technical scheme is adopted, the invention has the following advantages:
firstly, the claw is hinged with the base disc through the connecting part, so that the rigidity and the strength of the claw are improved, the large breakage in the process of transferring force from the connecting arm to the grasping arm is avoided, the axial installation position of the base disc is unchanged, and the axial position of the connecting part is also unchanged, so that the axial moving range of the whole claw is reduced, and the axial size of the chuck is favorably reduced; meanwhile, the connecting arm is connected with the grasping arm through the connecting part, the grasping arm only rotates around the first rotating shaft except for rotating along with the circumferential direction of the base plate, the motion track is simple, accurate control of grasping and releasing of the grasping arm is facilitated, and the grasping arm is guaranteed to accurately and reliably clamp the hub; in addition, the jack catch is directly connected with the base plate, avoids additionally arranging other structures to be matched with the jack catch, simplifies the internal structure of the chuck and lightens the weight of the whole chuck. Secondly, carriage release lever and linking arm pass through intermediate lever swing joint, and the carriage release lever turns into the rotation of linking arm around first pivot with axial rectilinear motion through the intermediate lever, has simplified the connection structure between carriage release lever and the linking arm, and the intermediate lever is connected in linking arm and carriage release lever through two revolute pairs, and whole transmission structure's rigidity is good, and simultaneously, the wearing and tearing between pivot and the shaft hole are little in the revolute pair, have guaranteed the carriage release lever, the life of linking arm and intermediate lever, also do benefit to the great clamp force of transmission. Finally, L1+ L2> L3 prevents the connecting arm and the middle rod from being collinear and unable to normally move reversely when the moving sleeve moves to the extreme position, avoids the moving sleeve from excessively extruding the first rotating shaft through the collinear connecting arm and the middle rod under the action of the driving device, ensures that the reciprocating motion of the moving sleeve is smooth and the service lives of the three rotating shafts, and the clamping jaws are clamped and loosened reliably and smoothly.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a block diagram of a reliable hub chuck of the present invention;
FIG. 2 is a top view of a reliable hub chuck of the present invention;
FIG. 3 is a cross-sectional view of a reliable hub chuck clamping hub in accordance with the present invention;
FIG. 4 is a cross-sectional view of a reliable hub chuck for loosening hubs in accordance with the present invention.
Detailed Description
The invention provides a reliable hub chuck, as shown in fig. 1 to 4, which comprises a claw 1 and a movable sleeve 2 with a movable rod 21, wherein a driving device drives the movable sleeve 2 to reciprocate along the axial direction of a main shaft, a base disc 3 synchronously rotating along with the main shaft is sleeved on the outer side of the movable sleeve 2, the base disc 3 is provided with an end face positioning piece 4 for axially positioning a hub 6, the claw 1 comprises a grasping arm 11, a connecting arm 13 and a connecting part 12 for connecting the grasping arm 11 and the connecting arm 13, the grasping arm 11 presses the hub 6 to the end face positioning piece 4 to clamp the hub 6, the connecting part 12 is hinged with the base disc 3 through a first rotating shaft 51, and the connecting arm 13 is movably connected with the movable rod 21.
The reciprocating moving sleeve 2 drives the grasping arm 11 to rotate around the first rotating shaft 51 through the moving rod 21 and the connecting arm 13, when the driving device drives the moving sleeve 2 to leave the hub 6 along the axial direction, the moving sleeve 2 drives the grasping arm 11 to rotate inwards, and the grasping arm 11 presses the edge of the hub 6 on the end face positioning piece 4, so that the hub 6 is clamped in the axial direction; when the driving device drives the moving sleeve 2 to approach the hub 6 along the axial direction, the moving sleeve 2 drives the grasping arm 11 to rotate outwards, and the grasping arm 11 releases the hub 6.
The claw 1 is hinged with the base disc 3 through the connecting part 12, so that the rigidity and the strength of the claw 1 are improved, the large breakage in the process of transferring force from the connecting arm 13 to the grasping arm 11 is avoided, the axial installation position of the base disc 3 is unchanged, and the axial position of the connecting part 12 is also unchanged, so that the axial moving range of the whole claw 1 is reduced, and the axial size of the chuck is favorably reduced; meanwhile, the connecting arm 13 is connected with the grasping arm 11 through the connecting part 12, the grasping arm 11 only rotates around the first rotating shaft 51 except for rotating along with the circumferential direction of the base plate 3, the motion track is simple, the grasping and releasing of the grasping arm 11 can be accurately controlled, and the grasping arm 11 can be guaranteed to accurately and reliably clamp the hub 6; in addition, jack catch 1 is direct to be connected with base plate 3, avoids establishing other structures in addition and jack catch 1 cooperation, has simplified the inner structure of chuck, has alleviateed the weight of whole chuck.
In the invention, the moving rod 21 is axially positioned between the hub 6 and the base disc 3, so that the axial distance between the moving disc and the free end of the gripping arm 11 is small, the axial size of the whole chuck is favorably reduced, meanwhile, the idle space between the end surface of the hub 6 and the base disc 3 is fully utilized, and the chuck structure is more compact. To further reduce the size of the chuck in the axial direction, the moving rod 21 may be disposed between the hub 6 and the first rotating shaft 51, specifically, the side of the base plate 3 facing the hub 6 is provided with a mounting groove 31 for mounting the connecting arm 13, and the first rotating shaft 51 is disposed on the groove side wall of the mounting groove 31.
An intermediate rod 7 is arranged between the moving rod 21 and the connecting arm 13, and two ends of the intermediate rod 7 are respectively connected with the moving rod 21 and the connecting arm 13 in a rotating manner. The movable rod 21 and the connecting arm 13 are movably connected through the intermediate rod 7, the movable rod 21 converts axial linear motion into rotation of the connecting arm 13 around the first rotating shaft 51 through the intermediate rod 7, the connecting structure between the movable rod 21 and the connecting arm 13 is simplified, the intermediate rod 7 is connected to the connecting arm 13 and the movable rod 21 through two revolute pairs, the rigidity of the whole transmission structure is good, meanwhile, abrasion between the rotating shaft and the shaft hole in the revolute pair is small, the movable rod 21 is guaranteed, the service life of the connecting arm 13 and the intermediate rod 7 is prolonged, and the transmission of large clamping force is facilitated.
In order to ensure that the grasping arm 11 has a sufficiently large opening and closing width, in the present invention, the length of the grasping arm 11 in the radial direction of the first rotating shaft 51 may be larger than the length of the connecting arm 13 in the radial direction of the first rotating shaft 51. Therefore, the connecting arm 13 can move the free end of the grasping arm 11 in a large range when rotating at a small angle, so that the grasping arm 11 is prevented from loosening and interfering with the hub 6, and the hub 6 is convenient to take and place. Meanwhile, in order to reduce the size of the whole claw 1 in the axial direction and the radial direction, the included angle alpha between the grasping arm 11 and the connecting arm 13 is less than or equal to 150 degrees.
In the present invention, one end of the intermediate lever 7 is hinged to the connecting arm 13 through a second rotating shaft 52, and the other end is hinged to the moving lever 21 through a third rotating shaft 53, the center distance between the first rotating shaft 51 and the second rotating shaft 52 is L1, the center distance between the second rotating shaft 52 and the third rotating shaft 53 is L2, and the center distance between the first rotating shaft 51 and the third rotating shaft 53 is L3, wherein L1+ L2> L3. The connecting arm 13 and the middle rod 7 are collinear and can not normally move reversely when the movable sleeve 2 moves to the limit position, the phenomenon that the movable sleeve 2 excessively extrudes the first rotating shaft 51 through the collinear connecting arm 13 and the middle rod 7 under the action of the driving device is avoided, and smooth reciprocating motion of the movable sleeve 2 and the service life of the three rotating shafts are guaranteed. In the invention, L3 is more than or equal to L1, so that the second rotating shaft 52 is positioned between the first rotating shaft 51 and the third rotating shaft 53 in the radial direction, the length of the connecting arm 13 is reduced, the axial moving distance of the moving rod 21 is smaller under the condition of ensuring that the grasping arm 11 has a large enough opening and closing angle, the axial size of the chuck is further reduced, and the occupied space of the whole connecting rod transmission mechanism is also reduced.
In the present invention, the end surface positioning element 4 may be disposed at an outer edge of the base plate 3, and the end surface positioning element 4 and the base plate 3 form an installation space 8 into which an end portion of the hub 6 extends. The arrangement of the mounting space 8 not only reduces the axial size of the whole machine tool, but also facilitates the realization of mounting and pre-positioning of the hub 6. In the present invention, the moving rod 21 is located in the installation space 8, further reducing the axial size of the chuck.
In order to align the center line of the hub 6 with the center line of the spindle, the middle of the base plate 3 may be provided with a core fixing seat 32 for radial positioning of the hub 6, and the core fixing seat 32 clamps the hole wall of the central hole of the hub 6 along the radial direction of the hub 6. Thereby whole wheel hub 6's axial and radial all realize the location, do benefit to subsequent lathe work, simultaneously, decide the pore wall cooperation support wheel hub 6 of core holder 32 and centre bore, reduced jack catch 1's clamp force demand, guaranteed the inside drive mechanism's of chuck life. In the invention, the bottom of the fixed core seat 32 is provided with a movable cavity 33 for the reciprocating movement of the movable sleeve 2 and the movable rod 21, the movable cavity 33 is internally provided with a guide post 34 extending axially, the movable sleeve 2 is arranged on the outer side of the guide post 34 and is in sliding connection with the guide post 34, the deflection caused by the radial force of the movable rod 21 when the movable sleeve 2 moves towards the hub 6 is avoided, the excessive abrasion between the movable sleeve 2 and the central hole of the base plate 3 is prevented, and the smooth reciprocating movement of the movable sleeve 2 is ensured.
In the invention, the driving device can be a hydraulic driving device, and can also be a pneumatic or electric driving device.
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (9)
1. A reliable hub chuck comprises a jack catch and a movable sleeve with a movable rod, wherein the movable sleeve is driven by a driving device to axially reciprocate along a main shaft, a base disc synchronously rotating along with the main shaft is sleeved outside the movable sleeve, the base disc is provided with an end face positioning piece for axially positioning a hub, and the hub chuck is characterized in that the jack catch comprises a grasping arm, a connecting arm and a connecting part for connecting the grasping arm and the connecting arm, the grasping arm compresses the hub on the end face positioning piece to clamp the hub, the connecting part is hinged with the base disc through a first rotating shaft, an intermediate rod is arranged between the movable rod and the connecting arm, one end of the intermediate rod is hinged with the connecting arm through a second rotating shaft, the other end of the intermediate rod is hinged with the movable rod through a third rotating shaft, the center distance between the first rotating shaft and the second rotating shaft is L1, the center distance between the second rotating shaft and the third rotating shaft is L2, wherein L1+ L2> L3; the travel bar is axially located between the hub and the base plate.
2. The positive hub chuck of claim 1, wherein the base plate has a mounting groove for mounting the connecting arm on a side surface facing the hub, and the first rotating shaft is disposed on a side wall of the mounting groove.
3. The positive hub chuck of claim 1, wherein the gripping arm has a length in the radial direction of the first axis of rotation that is greater than a length of the connecting arm in the radial direction of the first axis of rotation.
4. The positive hub chuck of claim 1, wherein the grasping arm and the connecting arm are angled at an angle α of 150 ° or less.
5. The positive hub chuck according to any one of claims 1 to 4, wherein L3 ≧ L1.
6. The positive hub chuck according to any one of claims 1 to 4, wherein the end surface positioning member is provided at an outer edge of the base plate, and the end surface positioning member and the base plate form a mounting space into which the end portion of the hub protrudes.
7. The positive hub chuck of claim 6, wherein the travel bar is located within the mounting space.
8. The hub chuck as claimed in any one of claims 1 to 4, wherein the central portion of the base plate is provided with a centering seat for radial positioning of the hub, and the centering seat clamps the hole wall of the central hole of the hub along the radial direction of the hub.
9. The reliable hub chuck of claim 8, wherein the bottom of the core holder is provided with a movable cavity for the movable sleeve and the movable rod to reciprocate, the movable cavity is provided with an axially extending guide post, and the movable sleeve is disposed outside the guide post and slidably connected with the guide post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758733.4A CN110394471B (en) | 2019-08-16 | 2019-08-16 | Reliable hub chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758733.4A CN110394471B (en) | 2019-08-16 | 2019-08-16 | Reliable hub chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110394471A CN110394471A (en) | 2019-11-01 |
| CN110394471B true CN110394471B (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910758733.4A Active CN110394471B (en) | 2019-08-16 | 2019-08-16 | Reliable hub chuck |
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| CN (1) | CN110394471B (en) |
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| CN111702467B (en) * | 2020-06-30 | 2022-03-15 | 西峡县飞龙汽车部件有限公司 | Jump ring installation device |
| CN112916841B (en) * | 2021-01-21 | 2022-06-14 | 河北起昌精密装备制造有限公司 | Casting is with a grabbing arm device of casting machine |
| CN113732774B (en) * | 2021-09-14 | 2022-12-13 | 东莞市三惠机械有限公司 | Quick clamping location frock |
| CN114871961A (en) * | 2022-04-25 | 2022-08-09 | 北京凝华科技有限公司 | Practice thrift clamping device of consumptive material |
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| JPH0966410A (en) * | 1995-08-31 | 1997-03-11 | Howa Mach Ltd | Chucking method and lathing method of aluminum wheel and finger chuck |
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| CN204603906U (en) * | 2015-04-22 | 2015-09-02 | 济南新立新机器制造有限公司 | A kind of vapour-pressure type clamping detection mechanism and Hub fixture |
| CN205183821U (en) * | 2015-11-11 | 2016-04-27 | 哈挺机床（上海）有限公司 | Frock clamp for processing car automatic gearbox support that numerical control lathe used |
| CN105537634A (en) * | 2016-01-22 | 2016-05-04 | 中信戴卡股份有限公司 | Lathe chuck for aluminum alloy hub |
| CN105798680A (en) * | 2016-05-01 | 2016-07-27 | 中信戴卡股份有限公司 | Automobile wheel lathe clamp |
| CN106670663A (en) * | 2017-01-23 | 2017-05-17 | 大族激光科技产业集团股份有限公司 | Chuck device |
| CN107737960A (en) * | 2014-11-13 | 2018-02-27 | 天津立中集团股份有限公司 | A kind of automatic locating center device of Hub fixture with position limiting structure |
| CN207642327U (en) * | 2017-12-29 | 2018-07-24 | 南京林业大学 | A kind of automotive hub Flexible Manufacture fixture |
| CN208976865U (en) * | 2018-10-30 | 2019-06-14 | 东莞市信迪机械工具有限公司 | It is a kind of for processing the Centering clamp tooling of wheel hub |
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| JPH0957509A (en) * | 1995-08-25 | 1997-03-04 | Howa Mach Ltd | Finger chuck |
| JPH0966410A (en) * | 1995-08-31 | 1997-03-11 | Howa Mach Ltd | Chucking method and lathing method of aluminum wheel and finger chuck |
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| Publication number | Publication date |
|---|---|
| CN110394471A (en) | 2019-11-01 |
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