CN210996569U

CN210996569U - Rotary clamping device

Info

Publication number: CN210996569U
Application number: CN201922141074.8U
Authority: CN
Inventors: 薛肇江; 陈如意
Original assignee: Huirun Electrical Co ltd
Current assignee: Huirun Electrical Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-07-14
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses a rotary clamping device, wherein the extending end of an elastic chuck is provided with at least three notches along the axis direction to form a plurality of split claws, and the clamping and the fixation are realized through the relative convergence and separation of the split claws; the rotating shaft is driven by the driving device to rotate and synchronously drives the elastic chuck to rotate, so that the workpiece synchronously rotates. The elastic chuck is internally provided with a spreading sleeve, the outside of the elastic chuck is provided with a clamping sleeve, the spreading sleeve and the clamping sleeve are relatively fixed and driven by a telescopic device to move along the axial direction, and the spreading sleeve and the clamping sleeve synchronously move along the axial direction; when the clamping sleeve moves outwards, the converging split claws can be gradually extruded, so that the workpiece is clamped, and when the spreading sleeve moves inwards, the split claws can be gradually spread, so that the workpiece is loosened; the utility model discloses a lateral shifting struts cover and clamping sleeve and realizes that quick clamping and pine take off to can make the work piece by the centre gripping rotate in step, the manipulator is got and is put the work piece and still can be used under the condition that has great position error.

Description

Rotary clamping device

Technical Field

The utility model relates to an anchor clamps frock technical field further relates to a gyration clamping device.

Background

When the operations such as cutting, polishing, drilling and the like are carried out on a workpiece, the workpiece needs to be clamped and positioned and then processed, and a three-jaw clamp is generally used for clamping;

the spring chuck clamping device is a cylindrical fixture used for being arranged on a milling machine and used for fastening a drill bit or a milling cutter. The spring chuck clamping device can accurately position and clamp a workpiece or a cutter, can resist torque and bear cutting force from multiple directions, realizes quick release of the workpiece or the cutter, ensures the machining precision, avoids the workpiece from being damaged, and can work in a wider spindle rotating speed range and has the capability of only extremely small clamping force loss.

In the field of automatic processing, a rotary processing part or a rotary assembly component is taken and placed quickly and automatically through a manipulator, and the manipulator clamps a workpiece and has large errors when placing the workpiece.

For those skilled in the art, how to design a turning device capable of automatically clamping and meeting the situation of large error when a manipulator takes and places a workpiece is a technical problem to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a gyration clamping device struts cover and clamping sleeve through lateral shifting and realizes that quick clamp is tight and strut, still can use when the manipulator clamp is got and is produced great error, and concrete scheme is as follows:

a rotary clamping device comprises an elastic chuck and a rotating shaft which are coaxially arranged, wherein the elastic chuck is cylindrical, and an extending end of the elastic chuck is provided with at least three notches along the axial direction, so that a plurality of split claws capable of elastically deforming are formed at the extending end of the elastic chuck; the driving device drives the elastic chuck and the rotating shaft to rotate;

the elastic chuck is internally provided with a spreading sleeve, the outside of the elastic chuck is provided with a clamping sleeve, and the spreading sleeve and the clamping sleeve are relatively fixed and driven to move along the axial direction by a telescopic device; the clamping sleeve can gradually extrude and gather the split claws when moving outwards, and the spreading sleeve can gradually separate the split claws when moving inwards.

Optionally, the expanding sleeve and the clamping sleeve are relatively fixed through a connecting column perpendicular to the axial direction; the connecting column penetrates through the elastic chuck.

Optionally, the rotating shaft is rotatably connected to a fixed seat through a rotary bearing, the telescopic device is an air cylinder, and a cylinder body of the air cylinder is fixed on the fixed seat;

the telescopic end of the cylinder is connected with the clamping sleeve through an angular contact ball bearing.

Optionally, the rotating shaft penetrates through the fixed seat;

the driving device drives the rotating shaft to rotate through a belt, a synchronous belt or a chain.

Optionally, a piston connecting frame is fixedly arranged at the telescopic end of the cylinder, and the piston connecting frame penetrates through the fixed seat and is connected with the clamping sleeve.

Optionally, a guide linear bearing for guiding the piston connecting frame is arranged on the fixed seat.

Optionally, the outer surface of the expanding sleeve is provided with an inclined surface for contacting with the inner wall of the collet, and the inner surface of the clamping sleeve is provided with an inclined surface for contacting with the outer wall of the collet.

The utility model provides a rotary clamping device, which is coaxially provided with an elastic chuck and a rotating shaft, wherein the elastic chuck is cylindrical, and the extending end of the elastic chuck is provided with at least three notches along the axis direction, so that a plurality of split claws capable of elastically deforming are formed at the extending end of the elastic chuck, and the clamping and the fixing are realized through the relative convergence and separation of the split claws; the rotating shaft and the elastic chuck are driven by the driving device to rotate and synchronously drive the elastic chuck to rotate, so that the workpiece synchronously rotates. The elastic chuck is internally provided with a spreading sleeve, the outside of the elastic chuck is provided with a clamping sleeve, the spreading sleeve and the clamping sleeve are relatively fixed and driven by a telescopic device to move along the axial direction, and the spreading sleeve and the clamping sleeve synchronously move along the axial direction; when the clamping sleeve moves outwards, the converging split claws can be gradually extruded, so that clamping is realized, and when the spreading sleeve moves inwards, the split claws can be gradually separated, so that loosening is realized; the utility model provides a rotary clamping device struts cover and clamping sleeve through lateral shifting and realizes that quick clamping and pine take off to can make the work piece by the centre gripping rotate in step, the device can self-holding, and the manipulator is got and is put the work piece and still can be used under the condition that has great position error.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1A is a schematic structural view of the open state of the rotary clamping device according to the present invention;

fig. 1B is a schematic structural view of a clamping state of the rotary clamping device according to the present invention;

FIG. 2A is a view showing a connection structure of the cylinder and other components;

fig. 2B is an overall structure diagram of the rotary clamping device provided by the present invention.

The figure includes:

the device comprises an elastic chuck 1, a rotating shaft 2, a rotary bearing 21, a spreading sleeve 3, a clamping sleeve 4, an angular contact bearing 41, a connecting column 5, a fixed seat 6, a cylinder 61, a piston connecting frame 62 and a guide cylinder 63.

Detailed Description

The core of the utility model lies in providing a gyration clamping device, struts cover and clamping sleeve through lateral shifting and realize that the quick clamp is tight and the pine takes off, can make the work piece by the centre gripping rotate in step, can self-holding, still can use under the condition that there is great position error when the manipulator is got and is put the work piece.

In order to make those skilled in the art better understand the technical solution of the present invention, the rotary clamping device of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1A and fig. 1B, which are schematic structural diagrams of the revolving clamping device according to the present invention, wherein the elastic chuck 1, the rotating shaft 2, the expanding sleeve 3, and the clamping sleeve 4 are matched with each other, fig. 1A shows a loosening state, fig. 1B shows a clamping state, and a in the drawing shows a clamped workpiece.

The utility model discloses a gyration clamping device includes collet 1 and pivot 2 of coaxial setting, and collet 1 is the cylindric, and 2 cartridges of pivot are within collet 1, accessible threaded connection between pivot 2 and the collet 1, and axial translation can be followed relatively to collet 1 and pivot 2, and both can rotate in step. The extending end of the elastic chuck 1 is provided with at least three notches along the axial direction, so that a plurality of split claws capable of elastically deforming are formed at the extending end of the elastic chuck 1, and the split claws can elastically deform and mutually converge or separate; the rotating shaft 2 is driven by a driving device to rotate, and the rotating shaft 2 and the elastic chuck 1 keep synchronous rotation.

The expansion sleeve 3 is arranged in the elastic chuck 1, the clamping sleeve 4 is arranged outside the elastic chuck 1, the expansion sleeve 3 and the clamping sleeve 4 are both cylindrical, the elastic chuck 1 is positioned in the clamping sleeve 4, the expansion sleeve 3 and the clamping sleeve 4 are relatively fixed, the expansion sleeve 3 and the clamping sleeve 4 keep synchronous movement, and the expansion sleeve and the clamping sleeve are driven by a telescopic device to move along the axial direction; the clamping sleeve 4 can gradually press and converge the split claws when moving outwards, and the spreading sleeve 3 can gradually separate the split claws when moving inwards, wherein the outward movement is close to one side of a clamped workpiece, namely the left side in fig. 1A, and the inward movement is also the right side in fig. 1A.

Before clamping a workpiece, as shown in fig. 1A, the expanding sleeve 3 and the clamping sleeve 4 are positioned on the right side, at this time, the taper opening of the clamping sleeve 4 is not contacted with the collet 1, the taper opening of the expanding sleeve 3 is contacted with the inner hole of the collet 1, the split claws of the collet 1 are kept in an expanded state, the space enclosed by the split claws is larger than the outer diameter of the workpiece, and the gap is very large, so that the workpiece can be placed in the split claws in a large range, and the workpiece can still be normally placed even if a manipulator clamps the workpiece to generate a large error; as shown in fig. 1B, after a workpiece is placed in the clamping fixture, the expanding sleeve 3 and the clamping sleeve 4 are moved leftwards, the conical surface of the expanding sleeve 3 gradually does not contact with the inner hole of the collet 1, the conical surface of the clamping sleeve 4 gradually contacts the outer conical surface of the collet, split claws of the collet 1 are gathered together, the size surrounded by the split claws is reduced until the size is slightly smaller than the outer diameter of the workpiece, and the workpiece is clamped and fixed; the rotating shaft 2 is driven to rotate through the driving device, the elastic chuck 1 and the workpiece rotate together, and the opening sleeve 3 and the clamping sleeve 4 integrally rotate together with the elastic chuck 1.

The utility model provides a rotary clamping device struts cover 3 and clamping sleeve 4 through lateral shifting and realizes that quick clamping and pine take off to can make the work piece by the centre gripping rotate in step, the device can self-holding, need not manual operation, still can use under the condition that there is great position error when manipulator gets the work piece. Fig. 2A is a connection structure diagram of the cylinder 61 and other components; fig. 2B is an overall structure diagram of the rotary clamping device provided by the present invention, based on the above scheme, the spreading sleeve 3 and the clamping sleeve 4 of the present invention are relatively fixed by the connecting columns 5 perpendicular to the axial direction, a plurality of connecting columns 5 are circumferentially arranged, and the connecting columns 5 are centrally and symmetrically distributed; the cylindrical side wall of the elastic chuck 1 is provided with a waist-shaped long hole, the connecting column 5 penetrates through the elastic chuck 1, and the connecting column 5 is respectively used for fixing the opening sleeve 3 and the clamping sleeve 4, so that the opening sleeve and the clamping sleeve are fixed into a whole.

The rotating shaft 2 is rotatably connected to the fixed seat 6 through a rotary bearing 21, and the rotary bearing 21 supports the rotating shaft 2, so that the rotating shaft 2 can rotate relative to the fixed seat 6; as shown in fig. 2A, the telescopic device is a cylinder 61, a cylinder body of the cylinder 61 is fixed on the fixed seat 6, a telescopic end of the cylinder 61 is connected with the clamping sleeve 4 through an angular contact ball bearing 41, the angular contact ball bearing 41 can simultaneously bear axial and radial acting forces, an outer ring of the angular contact ball bearing 41 is relatively fixed with a bracket connected with the telescopic end of the cylinder 61, an inner ring of the angular contact ball bearing 41 is relatively fixed with the clamping sleeve 4, the telescopic end of the cylinder 61 applies an axial acting force to the clamping sleeve 4 and the expanding sleeve 3, and the cylinder 61 is prevented from rotating along with the axial acting force due to the design of the angular contact bearing 41.

Alternatively, as shown in fig. 2B, the rotating shaft 2 penetrates through the fixing seat 6, that is, the main body part of the rotating shaft 2 is on the left side of the fixing seat 6 in the drawing, while the air cylinder 61 is located on the right side of the fixing seat 6, and the telescopic end of the air cylinder 61 penetrates through the fixing seat 6 and is connected opposite to the angular contact ball bearing 41.

Alternatively, the main body portion of the shaft 2 may be located on the right side of the fixing base 6.

Drive arrangement passes through belt, hold-in range or chain drive pivot 2 rotatory, and drive arrangement also sets up on fixing base 6, as shown in fig. 2B, and the part that 6 right sides of fixing base were stretched out to pivot 2 sets up the runner, and it is rotatory to drive the runner through the belt.

Specifically, the piston connecting frame 62 is fixedly arranged at the telescopic end of the cylinder 61, the piston connecting frame 62 penetrates through the fixed seat 6 to be connected with the clamping sleeve 4, and the piston connecting frame 62 is provided with straight rods with a plurality of parallel shaft axes, so that the telescopic end of the piston can move more stably.

In order to further improve the moving stability of the piston connecting frame 62, a guide cylinder 63 (linear bearing) for guiding the piston connecting frame 62 is arranged on the fixed seat 6, the inner wall of the guide cylinder 63 is in contact with the outer wall of the guide rod of the piston connecting frame 62, and the length of the guide cylinder 63 is greater than the thickness of the fixed seat 6, so that the piston connecting frame 62 is prevented from deflecting.

On the basis of above-mentioned arbitrary technical scheme and intercombination, the utility model discloses in strut the surface setting of cover 3 be used for with the inclined plane of collet 1's inner wall contact, the internal surface setting of clutch collar 4 be used for with the inclined plane of collet 1's outer wall contact, the inclined plane structure through the surface setting of the cover 3 that struts makes collet 1 open, the inclined plane through 4 internal surface settings of clutch collar makes collet 1 closed. The inclined surfaces of the expanding sleeve 3 and the clamping sleeve 4 are conical surfaces, the diameter of the part close to the outer end is large, and the diameter of the part close to the inner end is small.

Except that set up the inclined plane structure respectively on expanding sleeve 3 and clamping sleeve 4, also can set up the inclined plane structure at the internal surface and the surface of collet 1, perhaps all set up the inclined plane structure at the internal surface and the surface of collet 1, the internal surface of clamping sleeve 4, the surface of expanding sleeve 3, these specific embodiments all should be contained within the utility model discloses a within the scope of protection.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The rotary clamping device is characterized by comprising an elastic chuck (1) and a rotating shaft (2) which are coaxially arranged, wherein the elastic chuck (1) is cylindrical, and an extending end of the elastic chuck (1) is provided with at least three notches along the axial direction, so that a plurality of elastically deformable split claws are formed at the extending end of the elastic chuck (1); the driving device drives the elastic chuck (1) and the rotating shaft (2) to rotate;

the elastic chuck (1) is internally provided with a spreading sleeve (3), the outside of the elastic chuck is provided with a clamping sleeve (4), and the spreading sleeve (3) and the clamping sleeve (4) are relatively fixed and driven to move along the axial direction by a telescopic device; the clamping sleeve (4) can gradually extrude and converge the split claws when moving outwards, and the expanding sleeve (3) can gradually separate the split claws when moving inwards.

2. The rotary clamping device according to claim 1, characterized in that the expansion sleeve (3) and the clamping sleeve (4) are fixed relative to each other by a connecting column (5) perpendicular to the axial direction; the connecting column (5) penetrates through the elastic chuck (1) and is guided by the elastic chuck (1) to translate.

3. The rotary clamping device according to claim 2, wherein the rotary shaft (2) is rotatably connected to the fixed base (6) through a rotary bearing (21), the telescopic device is a cylinder (61), and a cylinder body of the cylinder (61) is fixed on the fixed base (6);

the telescopic end of the air cylinder (61) is connected with the clamping sleeve (4) through an angular contact ball bearing (41).

4. A rotary clamping device according to claim 3, characterized in that the rotary shaft (2) extends through the fixed seat (6);

the driving device drives the rotating shaft (2) to rotate through a belt, a synchronous belt or a chain.

5. A rotary clamping device according to claim 3, characterized in that a piston connecting frame (62) is fixedly arranged at the telescopic end of the cylinder (61), and the piston connecting frame (62) penetrates through the fixed seat (6) to be connected with the clamping sleeve (4).

6. A rotary clamping device according to claim 5, characterised in that a guide cylinder (63) for guiding the piston connecting frame (62) is arranged on the fixed base (6).

7. The rotary clamping device according to any one of claims 1 to 6, wherein the outer surface of the expansion sleeve (3) is provided with an inclined surface for contacting the inner wall of the collet (1), and the inner surface of the clamping sleeve (4) is provided with an inclined surface for contacting the outer wall of the collet (1).