CN219074421U

CN219074421U - Four-jaw single-action chuck

Info

Publication number: CN219074421U
Application number: CN202223424496.4U
Authority: CN
Inventors: 王国兴
Original assignee: Hangzhou Ouerfei Reducer Co ltd
Current assignee: Hangzhou Ouerfei Reducer Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-26
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses a four-jaw single-action chuck, which comprises: the chuck seat is provided with four radial first sliding grooves and four radial second sliding grooves in a staggered manner; the clamping jaw is respectively connected with the four first sliding grooves in a sliding manner, the part, exceeding the first sliding grooves along the axial direction of the chuck, of the clamping jaw is stepped, and a first thread is arranged on the part, inside the first sliding grooves, of the clamping jaw along the axial direction of the chuck; the four first threaded rods are rotationally connected to the chuck seat, correspond to the four first sliding grooves respectively, and are meshed with the first threads of the four clamping jaws respectively; the four first sliding blocks are respectively connected to the four second sliding grooves in a sliding manner, and the first sliding blocks do not exceed the clamping jaws along the axial direction of the chuck; the driving mechanism is arranged in the chuck seat and used for driving the four first sliding blocks to symmetrically move; and the four connecting rods are detachably connected to the four first sliding blocks respectively and are used for positioning the workpiece.

Description

Four-jaw single-action chuck

Technical Field

The utility model relates to a chuck, in particular to a four-jaw single-action chuck.

Background

The chuck is generally used for clamping a workpiece, the four-jaw single-action chuck can move independently for four jaws, the jaws are moved out through the cooperation of the threaded rod and the threaded surface, the clamping is rotated for 180 degrees, and the threaded surface can be matched to the threaded rod again. Namely, for the clamping jaw, the vertical first clamping surface and the step-shaped second clamping surface can be used for clamping a workpiece through switching through the operation. Therefore, compared with a three-jaw chuck, the four-jaw single-action chuck is more suitable for clamping disc-shaped workpieces, when the workpiece size is smaller, the first clamping surface can be used, and when the workpiece size is larger, the second clamping surface can be used. However, compared with a three-jaw chuck, the four-jaw single-action chuck lacks positioning, the axis of the disc-shaped workpiece needs to be coincident with the axis of the chuck, and the moving amount of each jaw needs to be controlled manually in the clamping process, so that the operation is inconvenient.

Disclosure of Invention

The application provides a four-jaw single-action chuck, which can solve the problem in the background art.

In this application, there is provided a four-jaw chuck comprising: the chuck comprises a chuck seat, wherein four radial first sliding grooves and four radial second sliding grooves are formed in the chuck seat in a staggered manner; the four clamping claws are respectively connected with the four first sliding grooves in a sliding mode, the parts, exceeding the first sliding grooves along the axial direction of the chuck, of the clamping claws are stepped, and the parts, inside the first sliding grooves, of the clamping claws along the axial direction of the chuck are provided with first threads; the four first threaded rods are rotationally connected to the chuck seat, correspond to the four first sliding grooves respectively, and are meshed with the first threads of the four clamping jaws respectively; the four first sliding blocks are respectively connected to the four second sliding grooves in a sliding manner, and the first sliding blocks do not exceed the clamping jaws along the axial direction of the chuck; the driving mechanism is arranged in the chuck seat and used for driving the four first sliding blocks to symmetrically move; and the four connecting rods are detachably connected to the four first sliding blocks respectively and used for positioning workpieces.

Further, the driving mechanism includes: the four second sliding blocks are connected in the chuck in a sliding manner and respectively correspond to the four second sliding grooves, the sliding direction of the second sliding blocks is perpendicular to the second sliding grooves, and matched inclined protrusions and inclined grooves are formed in the side surfaces, close to each other, of the first sliding blocks and the second sliding blocks; the annular external gear is rotationally connected in the chuck seat, and racks meshed with the annular external gear are arranged on the inner sides of the four second sliding blocks; the second threaded rod is rotationally connected in the chuck and used for driving one of the second sliding blocks to move.

Further, the four first sliding blocks are provided with a plurality of hole sites for connecting the connecting rods along the corresponding second sliding grooves.

Further, the middle parts of the four first threaded rods are smooth, the chuck base is detachably connected with four fan-shaped first mounting blocks, and the first mounting blocks are provided with mounting grooves matched with the first threaded rods.

Further, first notches are formed in the four first clamping surfaces of the clamping jaws, wherein the first clamping surfaces are vertical.

To sum up, in this application, a four-jaw single-action chuck has added three first sliders that remove simultaneously, and first slider does not interfere with the work piece, cooperates detachable connecting rod to three connecting rod are fixed a position the disc work piece, and after the location was accomplished, the three connecting rod was torn down again. The beneficial effects are as follows: when clamping the disc-shaped workpiece, the positioning can be conveniently finished.

Drawings

In order to better and clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings used in the embodiments or the background of the present application.

FIG. 1 is a schematic view of the structure of the present utility model;

FIG. 2 is a front view of the present utility;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a first mounting block;

FIG. 5 is a schematic view of a single jaw;

FIG. 6 is a schematic view of the placement of the second slider on the first mounting block and on the chuck base.

In the figure, 1, a chuck base; 011. a first chute; 012. a second chute; 2. a claw; 21. a first thread; 22. a first clamping surface; 23. the second clamping surface; 24. a first notch; 4. a first threaded rod; 5. a first slider; 51. hole sites; 6. a first mounting block; 61. a mounting groove; 62. an extension; 63. arc-shaped bulges; 7. a second slider; 8. an annular external gear; 9. a second threaded rod; 10. a guide rod; 11. a second mounting block; 111. a circular protrusion.

Detailed Description

Further description is provided below in connection with the accompanying drawings.

Referring to fig. 1 and 2, a four-jaw single-action chuck includes a chuck base 1, four jaws 2, four first threaded rods 4, four first sliders 5, a driving mechanism, and four connecting rods.

The chuck base 1 is provided with four radial first sliding grooves 011 and four radial second sliding grooves 012 in a staggered manner. Namely, a second sliding groove 012 is arranged between two adjacent first sliding grooves 011, and a first sliding groove 011 is arranged between two adjacent second sliding grooves 012.

The four claws 2 are slidably connected to the four first slide grooves 011, respectively. Referring to the existing claw 2, the claw 2 may have the following external shape: the clamping jaw 2 axially extends beyond the first sliding groove 011 along the chuck, and the exceeding part is stepped and is used for clamping a workpiece. The portion of the claw 2 in the first sliding groove 011 along the chuck axial direction is provided with a first thread 21, specifically, the inner wall of the portion is in a semicircular arc shape, and the first thread 21 is arranged on the inner wall of the semicircular arc shape.

Referring to fig. 3, 4 and 5, the four first threaded rods 4 are rotatably connected to the chuck base 1, alternatively, the middle parts of the four first threaded rods 4 are smooth, the chuck base 1 is detachably connected with four fan-shaped first mounting blocks 6, and the first mounting blocks 6 are provided with mounting grooves 61 matched with the first threaded rods 4; the first threaded rod 4 is primarily mounted to the chuck base 1, the first mounting block 6 is coupled to the chuck base 1, the engagement of the first threaded rod 4 and the mounting groove 61 is completed at the same time, and the jaws 2 are coupled to the chuck base 1 and the first threaded rod 4.

The four first threaded rods 4 are respectively engaged with the first threads 21 of the four jaws 2 corresponding to the four first sliding grooves 011. Referring to the conventional four-jaw single-action chuck, four first hole sites 51 are provided on the chuck base 1, each first hole site 51 corresponds to an end of one first threaded rod 4, and an inner hexagonal hole is provided on the section of the first threaded rod 4. Thus, by means of the internal hexagon, one of the first threaded rods 4 can be manually turned, which drives the corresponding jaw 2 to move back and forth in the radial direction. In addition, the clamping jaw 2 is moved out, the clamping jaw is rotated for 180 degrees, the first thread 21 can be matched with the first threaded rod 4 again, namely, for the clamping jaw 2, the vertical first clamping surface 22 and the stepped second clamping surface 23 can be used for clamping disc-shaped workpieces through the switching operation; the first clamping surface 22 may be used when the workpiece size is small and the second clamping surface 23 may be used when the workpiece size is large.

In one embodiment, optionally, the four clamping jaws 2 are each provided with a first notch 24 on a first vertical clamping surface 22. The first clamping surface 22 can be used to clamp a workpiece more conveniently.

Referring to fig. 4 and 6, four first sliding blocks 5 are slidably connected to four second sliding grooves 012, respectively, and the first sliding blocks 5 do not exceed the jaws 2 along the axial direction of the chuck. I.e. in the axial direction of the chuck, the first slide 5 can extend beyond the second slide 012 but not beyond the lowest surface of the second clamping surface 23, so that it is ensured that the first slide 5 does not interfere with the workpiece when the second clamping surface 23 is in use.

The driving mechanism is arranged in the chuck seat 1 and is used for driving the four first sliding blocks 5 to move symmetrically at the same time, namely, the four first sliding blocks 5 move at the same time and the distance between the four first sliding blocks and the axis of the chuck seat 1 is kept equal. In combination with the existing three-jaw chuck, the driving mechanism may be: an annular rotating disc is adopted, planar threads are arranged on the annular surface of the rotating disc, and multi-section protrusions matched with the planar threads are arranged on the four first sliding blocks 5. In another embodiment, alternatively, the driving mechanism may include: four second sliding blocks 7, an annular external gear 8 and a second threaded rod 9; the four second sliding blocks 7 are slidably connected in the chuck and respectively correspond to the four second sliding grooves 012, the sliding direction of the second sliding blocks 7 is perpendicular to the second sliding grooves 012, and are combined with the first installation block 6, an extension part 62 can be fixedly arranged on the first installation block 6, a guide rod 10 is fixedly arranged between the extension parts 62 of the two first sliding blocks 5, and the second sliding blocks 7 are slidably connected with the guide rod 10; the side surfaces of the first slide block 5 and the second slide block 7, which are close to each other, are provided with matched inclined protrusions and inclined grooves, so that the second slide block 7 slides to drive the first slide block 5 to slide; the annular external gear 8 is rotatably connected in the chuck seat 1 and is combined with the first mounting block 6, an arc-shaped protrusion 63 is arranged on the inner side of the first mounting block 6, a second mounting block 11 is detachably connected to the chuck seat, a circular protrusion 111 is arranged on the second mounting block 11, and the annular external gear 8 is limited by matching with the arc-shaped protrusion 63; racks meshed with the annular external gear 8 are arranged on the inner sides of the four second sliding blocks 7, so that one second sliding block 7 slides to drive the four second sliding blocks 7 to slide together; the second threaded rod 9 is rotatably connected to the inside of the chuck (rotatably connected to the corresponding extension 62) for driving one of the second sliders 7 to move, i.e. one end of the second threaded rod 9 passes out of the chuck.

The four connecting rods are detachably connected to the four first sliding blocks 5 respectively and used for positioning workpieces. Optionally, a plurality of hole sites 51 for connecting the connecting rods are provided along the corresponding second sliding grooves 012 on each of the four first sliding blocks 5. Thus, the four connecting rods can be mounted on the appropriate hole sites 51 of the four first sliders 5 according to the size of the disc-shaped workpiece; then, by simultaneously moving the four first sliding blocks 5, the four connecting rods are driven to move together to prop against the workpiece, so as to position the workpiece; then sequentially moving the four clamping jaws 2, and clamping and fixing a workpiece; finally, the four connecting rods are sequentially taken down.

Claims

1. A four-jaw chuck, comprising:

the chuck comprises a chuck seat (1), wherein four radial first sliding grooves (011) and four radial second sliding grooves (012) are formed in the chuck seat (1) in a staggered manner;

the clamping jaw (2) is respectively connected with the four first sliding grooves (011) in a sliding mode, the part, exceeding the first sliding grooves (011) along the axial direction of the chuck, of the clamping jaw (2) is in a step shape, and a first thread (21) is arranged on the part, inside the first sliding grooves (011), of the clamping jaw (2) along the axial direction of the chuck;

the four first threaded rods (4), the four first threaded rods (4) are rotatably connected to the chuck base (1), correspond to the four first sliding grooves (011) respectively, and are meshed with the first threads (21) of the four clamping jaws (2) respectively;

the four first sliding blocks (5), the four first sliding blocks (5) are respectively and slidably connected with the four second sliding grooves (012), and the first sliding blocks (5) do not exceed the clamping jaws (2) along the axial direction of the chuck;

the driving mechanism is arranged in the chuck seat (1) and is used for driving the four first sliding blocks (5) to symmetrically move;

and the four connecting rods are detachably connected to the four first sliding blocks (5) respectively and are used for positioning workpieces.

2. The four-jaw chuck as in claim 1, wherein said drive mechanism comprises:

the four second sliding blocks (7), the four second sliding blocks (7) are connected in the chuck in a sliding manner and respectively correspond to the four second sliding grooves (012), the sliding direction of the second sliding blocks (7) is perpendicular to the second sliding grooves (012), and matched inclined protrusions and inclined grooves are formed on the side surfaces of the first sliding blocks (5) and the second sliding blocks (7) which are close to each other;

the annular external gear (8), the annular external gear (8) is rotationally connected in the chuck base (1), and racks meshed with the annular external gear (8) are arranged on the inner sides of the four second sliding blocks (7);

the second threaded rod (9) is rotatably connected in the chuck and used for driving one of the second sliding blocks (7) to move.

3. A four-jaw chuck as claimed in claim 2, characterized in that the four first slides (5) are each provided with a plurality of holes (51) for connecting the connecting rods along the corresponding second runner (012).

4. A four-jaw single-action chuck as claimed in claim 1, wherein the central portions of the four first threaded rods (4) are smooth, four fan-shaped first mounting blocks (6) are detachably connected to the chuck base (1), and mounting grooves (61) for engaging the first threaded rods (4) are formed in the first mounting blocks (6).

5. A four-jaw chuck as claimed in claim 1, characterized in that the four jaws (2) are each provided with a first recess (24) on a first vertical clamping surface (22).