Rotary clamping device
阅读说明：本技术 一种回转夹紧装置 (Rotary clamping device ) 是由 薛肇江 陈如意 于 2019-12-03 设计创作，主要内容包括：本发明公开一种回转夹紧装置,弹性夹头外伸端设置至少三条沿轴线方向的切口,形成多块分瓣爪,通过多块分瓣爪的相对汇聚和分离实现夹持固定；转轴由驱动装置带动旋转,并同步带动弹性夹头转动,进而使工件同步转动。弹性夹头内部设置撑开套,其外部设置夹紧套,撑开套和夹紧套相对固定,并通过伸缩装置带动沿轴向运动,撑开套和夹紧套通过同步沿轴向移动；当夹紧套向外移动时能够逐渐挤压汇聚分瓣爪,从而实现工件被夹紧,撑开套向内移动时能够逐渐撑开分瓣爪,从而实现工件被松脱；本发明通过横向移动撑开套和夹紧套实现快速夹紧和松脱,并能够使被夹持的工件同步转动,该装置能够自动夹紧,机械手取放工件存在较大位置误差的情况下仍然能够使用。(The invention discloses a rotary clamping device.A protruding end of an elastic chuck is provided with at least three notches along the axial direction to form a plurality of split claws, and the clamping and fixing 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 device can realize rapid clamping and loosening by transversely moving the spreading sleeve and the clamping sleeve, can synchronously rotate the clamped workpiece, can automatically clamp the workpiece, and can still be used under the condition that a manipulator takes and places the workpiece with larger position error.)
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).
Technical Field
The invention relates to the technical field of clamp tools, in particular to a rotary 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.
Disclosure of Invention
The invention provides a rotary clamping device, which can realize rapid clamping and spreading through transversely moving a spreading sleeve and a clamping sleeve, and can still be used when a manipulator generates a large error in clamping, and the specific 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 invention provides a rotary clamping device, which is coaxially provided with an elastic chuck and a rotating shaft, 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, and clamping and 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 rotary clamping device provided by the invention can realize rapid clamping and loosening by transversely moving the opening sleeve and the clamping sleeve, can synchronously rotate a clamped workpiece, can automatically clamp the workpiece, and can still be used under the condition that a manipulator takes and places the workpiece with larger 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 the drawings without creative efforts.
FIG. 1A is a schematic structural view of a rotary clamping device according to the present invention in an open state;
FIG. 1B is a schematic 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 structural view of the rotary clamping device according to 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
Detailed Description
The core of the invention is to provide a rotary clamping device, which can realize rapid clamping and loosening by transversely moving a spreading sleeve and a clamping sleeve, can synchronously rotate a clamped workpiece, can automatically clamp the workpiece, and can still be used under the condition that a manipulator takes and places the workpiece with larger position error.
In order to make the technical solution of the present invention better understood by those skilled in the art, 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, in which an elastic chuck 1, a rotating shaft 2, an expanding sleeve 3, and a clamping sleeve 4 are matched with each other, fig. 1A shows a released state, fig. 1B shows a clamped state, and a in the drawings shows a clamped workpiece.
The rotary clamping device comprises an elastic chuck 1 and a rotating shaft 2 which are coaxially arranged, wherein the elastic chuck 1 is cylindrical, the rotating shaft 2 is inserted into the elastic chuck 1, the rotating shaft 2 and the elastic chuck 1 can be connected through threads, the elastic chuck 1 and the rotating shaft 2 can relatively translate along the axial direction, and the elastic chuck 1 and the rotating shaft 2 can synchronously rotate. 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 rotary clamping device provided by the invention can realize quick clamping and loosening by transversely moving the expanding sleeve 3 and the clamping sleeve 4, can synchronously rotate a clamped workpiece, can automatically clamp the workpiece without manual operation, and can still be used under the condition that a manipulator takes and places the workpiece with larger position error. Fig. 2A is a connection structure diagram of the
The rotating shaft 2 is rotatably connected to the fixed seat 6 through a
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
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
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
On the basis of any technical scheme and the combination of the technical schemes, the outer surface of the expanding sleeve 3 is provided with an inclined surface used for being contacted with the inner wall of the elastic chuck 1, the inner surface of the clamping sleeve 4 is provided with an inclined surface used for being contacted with the outer wall of the elastic chuck 1, the elastic chuck 1 is opened through the inclined surface structure arranged on the outer surface of the expanding sleeve 3, and the elastic chuck 1 is closed through the inclined surface arranged on the inner surface of the clamping sleeve 4. 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.
Besides the inclined surface structures respectively arranged on the expansion sleeve 3 and the clamping sleeve 4, the inclined surface structures can also be arranged on the inner surface and the outer surface of the collet 1, or the inclined surface structures are arranged on the inner surface and the outer surface of the collet 1, the inner surface of the clamping sleeve 4 and the outer surface of the expansion sleeve 3, and these specific embodiments are all included in the protection scope of the present invention.
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.
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