CN220806447U - Three-jaw chuck - Google Patents

Abstract

The application relates to a three-jaw chuck, which relates to the field of metal processing machinery casting, and comprises a chuck shell, a bevel pinion, a bevel gear, three bevel gears and planar threads, wherein the chuck shell is in a circular cylinder shape, the three bevel gears uniformly penetrate through the circumferential side wall of the chuck shell, the bevel gear is sleeved and fixed at one end of the bevel gear penetrating into the chuck shell, the bevel pinion can synchronously rotate with the bevel gear, the bevel pinion is connected with the circular bevel gear, the planar threads are fixedly arranged on the back surface of the bevel gear, and three slide ways are uniformly arranged on the chuck shell, and the three-jaw chuck is characterized in that: the three slide ways are internally provided with claw assemblies, the three claw assemblies jointly clamp the round table workpiece, and the contact surfaces of the claw assemblies and the round table workpiece are arc-shaped. The three-jaw chuck has the effect of tightly clamping round platforms or conical workpieces with different inclinations in a matching way and enhancing the clamping capacity of the three-jaw chuck on the workpieces.

Description

Three-jaw chuck

Technical Field

The application relates to a three-jaw chuck, which relates to the field of metal processing machinery casting,

Background

Today, machining manufacturers are required to use three-jaw chucks to clamp and position workpieces frequently. In the process of mechanical part production or processing, the three-jaw chuck is mainly applied to processing occasions such as finish turning, grinding, rough turning by using a universal dividing head for milling, grinding without the requirement of geometric accuracy, and the like, and is mainly used for processing round parts or round table-shaped parts.

According to the three-jaw chuck of the machine tool disclosed in the patent publication No. CN218224702U in the prior art, jaw parts are in linear contact with a clamped workpiece, the jaw parts apply pressure, and the three jaws jointly act to clamp and limit the workpiece. Doing so tends to create a greater pressure on the localized locations of the surface of the workpiece. And for some clamping workpieces in a truncated cone shape or a conical shape, the clamping effect is not good.

With respect to the above related art, the inventor considers that the clamping effect of the three-jaw chuck jaw of the above related art on the workpiece is not good, and only one radial section can be clamped on some round table-shaped or conical workpieces, so that the workpieces may be damaged due to shaking during the processing process.

Disclosure of utility model

In order to improve the workpiece clamping capability of the existing three-jaw chuck and meet the clamping requirements of different workpieces, the application provides the three-jaw chuck.

The three-jaw chuck provided by the application adopts the following technical scheme:

The utility model provides a three-jaw chuck, includes chuck shell, bevel pinion, big bevel gear, three bevel gear, plane screw thread, the chuck shell is the cylindricality of ring, and is three the bevel gear evenly wears to locate on the circumference lateral wall of chuck shell, the bevel gear wears to establish into the one end cover of chuck shell is established and is fixed with bevel pinion, bevel pinion can with bevel gear synchronous rotation, bevel pinion cooperation is connected with the big bevel gear of cylindricality, big bevel gear's the back is provided with and is fixed with the plane screw thread, three slides have evenly been seted up on the chuck shell, its characterized in that: the three slide ways are internally provided with claw assemblies, the three claw assemblies jointly clamp round table workpieces, and the contact surfaces of the claw assemblies and the round table workpieces are arc-shaped.

Through adopting above-mentioned technical scheme, when using the tool to rotate arbitrary umbrella tooth, the umbrella tooth is because with little bevel gear coaxial fastening, also make little bevel gear rotate thereupon, little bevel gear and big bevel gear meshing, so big bevel gear also rotates on the horizontal plane along with little bevel gear, plane screw thread and big bevel gear coaxial fixed connection, so plane screw thread also along with rotatory, drive the jack catch subassembly with plane threaded connection on it, make jack catch subassembly advance or retreat on plane screw thread, the contact surface of jack catch subassembly and round platform work piece is the cambered surface, can guarantee under the centre gripping circumstances, jack catch subassembly and round platform work piece area of contact increase, the pressure that unit area produced reduces, and laminate with round platform work piece completely.

Optionally, the jack catch subassembly includes dop, cassette, the dop can dismantle set up in the cassette is close to one side of chuck shell axle center, the dop with be provided with fixed establishment between the cassette, fixed establishment will the dop with the cassette is connected fixedly.

By adopting the technical scheme, the jaw assembly comprises two parts of the clamping head and the clamping seat, the clamping head and the clamping seat are detachably assembled and fixed, and the clamping head can be replaced according to clamping requirements of round table workpieces or conical workpieces with different inclinations and shafts, so that the three-jaw chuck has wider application range.

Optionally, the fixed establishment includes slider, spout, the slider set up in the dop is towards one side of cassette, the slider is T shape structure, the slider is followed chuck axle center direction sets up, the spout set up in on the cassette towards one side of slider, and with the slider is followed chuck axle center direction sliding fit.

Through adopting above-mentioned technical scheme, the slider of dop slides into the draw-in groove on the cassette along the direction of chuck axle center in, because the slider is T shape structure, so can carry out spacingly to the removal of dop in the horizontal direction, prevent that the dop from rocking at the centre gripping in-process.

Optionally, the clamping seat upper side is close to the spout position has seted up perpendicularly to the first bolt hole of chuck axle center, seted up on the dop with first bolt hole coaxial and complex first screw hole.

Through adopting above-mentioned technical scheme, through setting up first bolt hole and first screw hole, connect fixedly slider and cassette on the block, play the limiting displacement to the slider in vertical orientation, and first screw hole does not run through the dop, so to the centre gripping function of dop and with the area of contact of round platform work piece do not have the influence.

Optionally, the fixed establishment includes the bolt boss, the bolt boss set up in the dop is close to one side of cassette, the bolt boss is perpendicular to one side of bolt boss extending direction has been seted up and has been run through the second bolt hole, be provided with the bolt groove on the cassette, the cassette is in the bolt inslot is along perpendicular to the both sides symmetry of cassette extending direction has been seted up and has been run through the third bolt hole, the bolt boss with the bolt groove cooperation the dop with the cassette card is when the second bolt hole with the coaxial and the same diameter of third bolt hole.

Through adopting above-mentioned technical scheme, the bolt boss can be with the bolt groove lock, and the bolt boss is the same with the shape and the size of bolt groove, and the cassette wears to be equipped with the screw rod and cooperates the nut in third bolt hole position, fixes chuck and cassette jointly.

Optionally, the contact surface of the chuck and the round table workpiece is a conical arc surface, and the arc radius of one end of the chuck far away from the round table workpiece is smaller than the arc radius of one end of the chuck close to the round table workpiece.

Through adopting above-mentioned technical scheme, the setting of toper arc surface is in order to make the contact increase of jack catch subassembly and round platform work piece, guarantees the fixed phenomenon that can not take place to rock of the fixed position of centre gripping work piece.

Optionally, a plurality of anti-skidding lines perpendicular to the axis direction of the chuck are arranged on the conical arc surface side by side.

Through adopting above-mentioned technical scheme, anti-skidding line perpendicular to round platform work piece because round platform work piece can take place to slide and break away from the condition of three-jaw chuck in the centre gripping in-process, consequently set up anti-skidding line at the toper arc surface, be used for increasing the slip coefficient of friction of toper arc surface.

Optionally, the cassette is square table shape, the area size that the cassette is close to chuck one end is greater than the area size that the cassette is kept away from chuck one end.

Through adopting above-mentioned technical scheme, square table structure makes the overall structure of cassette is more firm, can bear more extrusion forces, is more convenient for the setting of first screw hole when saving production material.

Optionally, when three the jack catch subassembly centre gripping the round platform work piece, adjacent be provided with the clearance between the jack catch subassembly.

Through adopting above-mentioned technical scheme, when three jack catch subassembly carries out the centre gripping to round platform work piece, can not take place the contact phenomenon between the adjacent dop, consequently can not take place in the condition that three dop extrusion collided and damaged the dop in regulation and centre gripping in-process.

Optionally, the chuck shell middle part has offered along the axle center and has run through the chuck hole, the chuck shell is in the chuck hole is kept away from the one end nestification of jack catch subassembly is provided with the holding ring of round platform form, the axial length of holding ring is less than the axial length of chuck shell, the internal diameter of holding ring with the diameter cooperation of round platform work piece here.

By adopting the technical scheme, because the axial length of the conical arc surface contacted with the round platform workpiece is not large, the round platform workpiece can possibly shake, and the positioning ring is arranged to fix and limit one end of the round platform workpiece, which is deep into the three-jaw chuck, so that the bearing pressure of the chuck on radial shake of the round platform workpiece can be shared.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The contact surface of the clamping head on the three-jaw chuck clamping jaw assembly and the round table workpiece is a conical arc surface, and compared with the prior art, the contact area of the clamping jaw or the clamping jaw assembly and the clamping workpiece is increased, so that the clamping effect is better;

2. The clamping head can be detached and replaced, so that the clamping requirements of different workpieces are met, and the clamping seat are fixedly connected through threads, so that the clamping head and the clamping seat are fixedly arranged when the clamping jaw assembly is used;

3. The anti-skid lines are arranged on the conical arc surface, so that the sliding friction coefficient of the contact surface of the chuck and the round table workpiece is increased, and the axial limiting capacity of the three-jaw chuck is improved.

Drawings

Fig. 1 is an exploded view of a three jaw chuck according to the present application.

Fig. 2 is an overall view of a first embodiment of a three-jaw chuck according to the present application.

Fig. 3 is an exploded view of a specific structure of a chuck and holder securing mechanism in accordance with a first embodiment of the present application.

Fig. 4 is an overall view of a second embodiment of a three-jaw chuck according to the present application.

FIG. 5 is an exploded view of a chuck and holder securing mechanism according to a second embodiment of the present application

Reference numerals illustrate: 1. a chuck shell; 11. a slideway; 2. umbrella teeth; 3. bevel pinion; 4. a large bevel gear; 5. a planar thread; 6. a jaw assembly; 61. a chuck; 611. a first threaded hole; 612. anti-skid lines; 62. a clamping seat; 621. a first bolt hole; 63. a fixing mechanism; 631. a slide block; 632. a chute; 633. bolt boss; 6331. a second bolt hole; 634. a bolt slot; 6341. a third bolt hole; 7. round table work piece; 8. a chuck hole; 81. and a positioning ring.

Detailed Description

The application is described in further detail below with reference to fig. 1-5.

Example 1

The embodiment of the application discloses a three-jaw chuck.

Referring to fig. 1, a three-jaw chuck comprises a chuck shell 1, three uniformly distributed bevel gears 2, a bevel pinion 3, a bevel gear 4, a plane thread 5 and a round table workpiece 7, wherein the three bevel gears 2 are arranged on the circumferential side wall of the chuck shell 1 in a penetrating manner. One end of the bevel gear 2 extending into the chuck shell 1 is fixedly sleeved with a small bevel gear 3, the small bevel gear 3 is connected with a big bevel gear 4 in a meshed manner, and the big bevel gear is circular and is arranged on one side, close to the top of the chuck shell 1, of the small bevel gear 3 along the horizontal direction. The large bevel gear 4 is fixedly connected with a plane thread 5, and the plane thread 5 is coaxial with the large bevel gear 4 and can synchronously rotate together with the large bevel gear 4. Three slide ways 11 are arranged at the top of the chuck shell 1, angles formed between adjacent three slide ways 11 form one hundred twenty degrees, and the slide ways 11 are communicated with the central chuck hole 8 and the circumferential side wall of the chuck shell 1. The clamping jaw assemblies 6 are arranged in the slide ways 11, limiting strips are symmetrically arranged at contact positions of the clamping jaw assemblies 6 and the slide ways 11, and the three clamping jaw assemblies 6 jointly clamp the round table workpiece 7.

Referring to fig. 2 and 3, the jaw assembly 6 includes a chuck 61 and a chuck base 62, and the chuck 61 is detachably connected to the chuck base 62. The chuck 61 is a conical arc surface at the contact position with the round table workpiece 7, and the three conical arc surfaces jointly enclose a round table-shaped hole, and a plurality of anti-skid threads 612 perpendicular to the axis of the chuck shell 1 are arranged on the conical arc surface side by side. The chuck 61 is provided with slider 631 in keeping away from one side of toper arc surface, and slider 631 is T shape structure along chuck shell 1 axle center direction, and the slide groove 632 of slider 631 complex is seted up to the one side that cassette 62 is close to slider 631. The upper part of the clamping seat 62 is provided with a first bolt hole 621 along the horizontal direction, the clamping head 61 is provided with a first threaded hole 611 which is coaxial with and matched with the first bolt hole 621, and the clamping seat 62 is of a square table structure.

Referring to fig. 1, a chuck hole 8 is formed in the chuck shell 1 along the axis, a positioning ring 81 is sleeved at the bottom of the chuck shell 1 at the position of the chuck hole 8, and the inclination of the positioning ring 81 is the same as that of the round table workpiece 7.

The implementation principle of the three-jaw chuck provided by the embodiment of the application is as follows: when any bevel gear 2 is rotated, the bevel pinion 3 is rotated, and the engaged bevel pinion 4 is rotated. The large bevel gear 4 is fixed with the planar thread 5, so that the planar thread 5 rotates, and the planar thread 5 drives the jaw assembly 6 thereon to clamp a workpiece or retract. The contact surface of the chuck 61 of the chuck assembly and the round table workpiece 7 is an arc surface, and the anti-skid patterns 612 are arranged on the arc surface, so that the clamping and connecting structure of the three-jaw chuck and the round table workpiece 7 is more stable.

Example two

Referring to fig. 4 and 5, a bolt boss 633 is disposed on one side of the conical arc surface of the chuck 61, and a second bolt hole 6331 is formed in the bolt boss 633 along a direction perpendicular to the axis of the chuck shell 1. The clamping seat 62 is provided with a bolt groove 634 matched with the bolt boss 633 at one side close to the clamping head 61, and the clamping seat 62 is provided with third bolt holes 6341 which are coaxial with the second bolt holes 6331 and have the same diameter at two sides of the bolt groove 634. The chuck 61 is fixedly connected with the chuck base 62 by bolts.

The three-jaw chuck of the present embodiment is the same as the first embodiment except for the fixing mechanism of the chuck and the chuck base, and therefore will not be described in detail herein.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. The utility model provides a three-jaw chuck, includes chuck shell (1), bevel pinion (3), big bevel gear (4), three bevel gear (2), plane screw thread (5), chuck shell (1) are the cylindricality of ring, and is three bevel gear (2) evenly wear to locate on the circumference lateral wall of chuck shell (1), bevel gear (2) wear to establish into one end cover of chuck shell (1) is established and is fixed with bevel pinion (3), bevel pinion (3) can with bevel gear (2) synchronous rotation, bevel pinion (3) cooperation is connected with annular big bevel gear (4), the back of big bevel gear (4) is provided with and is fixed with plane screw thread (5), three slide (11) have evenly been seted up on chuck shell (1), its characterized in that: three be provided with jaw subassembly (6) in slide (11), three jaw subassembly (6) centre gripping jointly has round platform work piece (7), jaw subassembly (6) with round platform work piece (7) contact surface is convex, jaw subassembly (6) include chuck (61), cassette (62), chuck (61) can dismantle set up in cassette (62) are close to one side of chuck shell (1) axle center, chuck (61) with be provided with fixed establishment (63) between cassette (62), fixed establishment (63) will chuck (61) with cassette (62) are connected fixedly, chuck (61) with round platform work piece (7) contact surface is the toper arc face, just one end arc radius that chuck (61) kept away from round platform work piece (7) is less than chuck (61) are close to the arc radius of one end of round platform work piece (7).

2. A three jaw chuck according to claim 1, wherein: the fixing mechanism (63) comprises a sliding block (631) and a sliding groove (632), the sliding block (631) is arranged on one side of the clamping head (61) facing the clamping seat (62), the sliding block (631) is of a T-shaped structure, the sliding block (631) is arranged along the axis direction of the clamping disc, and the sliding groove (632) is arranged on one side of the clamping seat (62) facing the sliding block (631) and is in sliding fit with the sliding block (631) along the axis direction of the clamping disc.

3. A three jaw chuck according to claim 2, wherein: the upper side of the clamping seat (62) is provided with a first bolt hole (621) which is perpendicular to the axis of the chuck at a position close to the sliding groove (632), and the clamping head (61) is provided with a first threaded hole (611) which is coaxial with and matched with the first bolt hole (621).

4. A three jaw chuck according to claim 1, wherein: the fixing mechanism (63) comprises a bolt boss (633), the bolt boss (633) is arranged on one side, close to the clamping seat (62), of the clamping head (61), a second bolt hole (6331) is formed in the bolt boss (633) perpendicular to one side of the extending direction of the bolt boss (633), a bolt groove (634) is formed in the clamping seat (62), a third bolt hole (6341) is formed in the clamping seat (62) along the direction perpendicular to the extending direction of the clamping seat (62) in a symmetrical mode, the bolt boss (633) is matched with the bolt groove (634), and when the clamping head (61) is clamped with the clamping seat (62), the second bolt hole (6331) is coaxial with the third bolt hole (6341) and has the same diameter.

5. A three jaw chuck according to claim 1, wherein: and a plurality of anti-slip patterns (612) perpendicular to the axis direction of the chuck are arranged on the conical arc surface side by side.

6. A three jaw chuck according to claim 1, wherein: the clamping seat (62) is square, and the area size of one end of the clamping seat (62) close to the clamping head (61) is larger than the area size of one end of the clamping seat (62) far away from the clamping head (61).

7. A three jaw chuck according to claim 1, wherein: when the three jaw assemblies (6) clamp the round table workpiece (7), gaps are formed between adjacent jaw assemblies (6).

8. A three jaw chuck according to claim 1, wherein: the chuck is characterized in that a chuck hole (8) is formed in the middle of the chuck shell (1) along the axis, the chuck shell (1) is in the state that one end, away from the jaw assembly (6), of the chuck hole (8) is nested to be provided with a circular table-shaped positioning ring (81), the axial length of the positioning ring (81) is smaller than that of the chuck shell (1), and the inner diameter of the positioning ring (81) is matched with the diameter of the circular table workpiece (7) at the position.