CN214134924U

CN214134924U - Centering clamping mechanism and ring piece processing equipment

Info

Publication number: CN214134924U
Application number: CN202023227685.3U
Authority: CN
Inventors: 闫志伟
Original assignee: Shanxi Double Ring Heavy Industry Group Co ltd
Current assignee: Shanxi Double Ring Heavy Industry Group Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-07
Anticipated expiration: 2030-12-28

Abstract

The application discloses centering clamping mechanism and ring piece processing equipment relates to ring piece processing technology field. The centering and clamping mechanism comprises an installation frame, a driving piece, a transmission unit and at least three groups of clamping units; at least three groups of clamping units are uniformly distributed and installed in the circumferential direction of the installation rack; the transmission unit is connected between the driving piece and the at least three groups of clamping units; the transmission unit comprises a movable seat and at least three swinging pieces, and the at least three swinging pieces are in one-to-one corresponding rotary connection with the at least three groups of clamping units; one end of the swinging piece close to the movable seat is rotatably connected with a rolling piece, and the rolling piece is rotatably connected with the movable seat; the driving piece is used for driving the movable seat to move so as to drive the at least three swinging pieces to synchronously move, and then the at least three swinging pieces drive the at least three groups of clamping units to clamp or release the ring piece in a centering way. The application provides a centering clamping mechanism can avoid dead problem of card to appear in the working process transmission unit.

Description

Centering clamping mechanism and ring piece processing equipment

Technical Field

The application relates to the technical field of ring piece processing, in particular to a centering clamping mechanism and ring piece processing equipment.

Background

In the process of machining the ring member such as a flange, particularly before drilling a bolt hole after finish turning of the ring member, the ring member needs to be centered so that the center of the ring member is centered with the center of a machine tool, so that the machine tool can machine the bolt hole at a set position of the ring member.

However, the existing ring centering mechanism is easy to be stuck in the working process, so that the machining efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The application provides a centering clamping mechanism and ring piece processing equipment, avoids appearing the dead problem of card in the course of the work to ensure machining efficiency.

In order to solve the above problems, the present application provides:

a centering and clamping mechanism is used for centering and clamping a ring piece and comprises a mounting rack, a driving piece, a transmission unit and at least three groups of clamping units; the at least three groups of clamping units are uniformly distributed and installed in the circumferential direction of the installation rack; the transmission unit is connected between the driving piece and the at least three groups of clamping units;

the transmission unit comprises a movable seat and at least three swinging pieces, and the at least three swinging pieces are in one-to-one corresponding rotary connection with the at least three groups of clamping units; one end of the swinging piece, which is close to the movable seat, is rotatably connected with a rolling piece, and the rolling piece is rotatably connected with the movable seat;

the driving piece is used for driving the movable seat to move so as to drive the at least three swinging pieces to synchronously move, and then the at least three swinging pieces drive the at least three groups of clamping units to clamp or release the ring piece in a centering manner.

In a possible embodiment, the swinging member includes a connecting portion, a first swinging portion and a second swinging portion, the first swinging portion and the second swinging portion being provided on both sides of the connecting portion;

the connecting part is rotatably arranged on the mounting rack; the first swinging part is connected with the movable seat through the rolling piece; the second swinging part is rotatably connected with the clamping unit.

In a possible embodiment, a limiting groove is circumferentially arranged on the movable seat in a surrounding manner, and the limiting groove is coaxially arranged with the at least three groups of clamping units; the rolling piece rolls and is limited in the limiting groove.

In a possible embodiment, the clamping unit comprises a mounting seat, a sliding frame and a clamping head, the sliding frame is slidably mounted in the mounting seat, and the sliding direction of the sliding frame is arranged along the radial direction of the mounting seat; the chuck is arranged on one side, far away from the mounting seat, of the sliding frame;

the sliding frame is connected with the transmission unit, and the transmission unit is used for driving the sliding frame to slide along the radial direction of the mounting frame so as to drive the chuck to clamp or release the ring piece in a centering manner.

In a possible embodiment, the clamping unit further comprises a driving assembly and a transmission rod arranged in the sliding frame, and the transmission rod is in transmission connection with the driving assembly and the chuck respectively;

the driving assembly is used for driving the transmission rod to move so as to drive the chuck to move relative to the sliding frame, and the chuck is arranged along the radial direction of the mounting frame along the moving direction of the sliding frame.

In one possible embodiment, the driving assembly comprises a stepping motor, and the transmission rod is in threaded transmission connection with the chuck; the sliding frame is used for limiting the chuck to rotate in the circumferential direction of the transmission rod;

the stepping motor is used for driving the transmission rod to rotate so as to drive the chuck to move along the sliding frame.

In a possible embodiment, the chuck is in transmission connection with the transmission rod through a transmission sleeve, the transmission sleeve is in threaded fit connection with the transmission rod, and the chuck is fixedly connected to the transmission sleeve.

In one possible embodiment, the drive sleeve is a half nut.

In one possible embodiment, a copper plate is arranged around the outside of the clamping head, said copper plate being used to reduce the impact of the clamping head on the ring.

In another aspect, the application provides a ring machining device, which comprises the centering and clamping mechanism.

The beneficial effect of this application is: the application provides a centering clamping mechanism, including mounting bracket, driving piece, drive unit and three at least group's clamping unit, the circumference evenly distributed of clamping unit round the mounting bracket of three at least groups, drive unit transmission connect in the driving piece with between the clamping unit of three at least groups. The transmission unit comprises a movable seat and at least three swinging pieces, and the at least three swinging pieces are in one-to-one corresponding rotary connection with the at least three groups of clamping units. One end of the swinging piece, which is far away from the clamping unit, is connected with the movable seat through a rolling piece, and the rolling piece is respectively connected with the swinging piece and the movable seat in a rotating way. In the working process, the driving piece is used for driving the movable seat to move so as to drive the at least three swinging pieces to synchronously move, and then the at least three swinging pieces drive the at least three groups of clamping units to clamp or release the ring piece in a centering way.

In the working process of the centering and clamping mechanism, the problem that the transmission unit part is easy to be blocked is generally solved. In the application, the swinging piece is rotatably connected with the clamping unit, the swinging piece is rotatably connected with the rolling piece, the rolling piece is rotatably connected with the movable seat, and the swinging piece, the rolling piece, the movable seat and the clamping unit can be compensated through relative rotation among the components in the transmission process, namely when the clamping unit is blocked, the clamping problem can be relieved through relative rotation among the related components, so that further blocking is avoided. Therefore, the transmission unit can be ensured to move smoothly under the driving of the driving piece, so that the clamping unit can move smoothly, the problem of clamping of the centering and clamping mechanism is avoided, and the processing efficiency is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic top view of a ring centering and clamping mechanism;

FIG. 2 is a schematic view showing an installation structure of the clamping unit and the mounting bracket;

FIG. 3 is a partially enlarged schematic view of portion A of FIG. 2;

FIG. 4 shows a schematic sectional view of a clamping unit in a connected state with a transmission unit;

FIG. 5 is a partial enlarged schematic view of portion B of FIG. 4;

FIG. 6 is a partial enlarged schematic view of a portion C of FIG. 4;

FIG. 7 is a partial schematic view showing a state where the holding unit is connected to the driving unit;

FIG. 8 shows a schematic construction of a pendulum;

fig. 9 shows a schematic configuration diagram of the holding unit in a state;

fig. 10 shows a schematic configuration diagram of the holding unit in another state.

Description of the main element symbols:

10-a mounting frame; 11-a support plate; 111-a support base; 112-a first avoidance hole; 12-a base; 121-a second avoidance hole;

20-a clamping unit; 21-a mounting seat; 211-a chute; 22-a carriage; 221-a connecting seat; 2211-third rotating shaft; 222-a mounting groove; 223-a slide bearing; 23-a drive assembly; 231-a stepper motor; 232-speed reducer; 24-a transmission rod; 25-a chuck; 251-a connecting sleeve; 252-red copper plate; 26-a transmission sleeve; 27-a cover plate;

30-a drive member; 31-an output shaft;

40-a transmission unit; 41-a movable seat; 411-a limiting groove; 42-a pendulum; 421-a connecting portion; 4211-connecting hole; 422-a first oscillating portion; 423-a second swing part; 4231-a plug groove; 424-first side; 425-a second side; 43-a first shaft; 44-rolling elements; 45-a second rotating shaft;

50-ring member.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

In the process of machining the ring 50 such as a flange, particularly when the ring 50 is drilled after finish turning, the center of the ring 50 and the center of a drilling machine tool need to be centered first to ensure that the drilling machine tool machines a hole structure at a specified position of the ring 50.

The embodiment provides a centering and clamping mechanism, which can be applied to the machining process of the ring 50 to perform centering and clamping on the ring 50, so that a subsequent drilling machine can perform drilling machining on the ring 50 at a precise position.

In other embodiments, the centering and clamping mechanism provided by the present application can also be used in other processes during the processing of the ring 50 to perform centering and clamping on the ring 50.

As shown in fig. 1, 2 and 4, the centering and clamping mechanism includes a mounting frame 10, a driving member 30, a transmission unit 40 and at least three sets of clamping units 20.

In some specific embodiments, the mounting bracket 10 includes a base 12 and a support plate 11. The supporting plate 11 may be a circular plate-shaped structure, and the base 12 may be a cylindrical structure with one side open. The supporting plate 11 is disposed around the base 12, and the supporting plate 11 is disposed near an opening end of the base 12, and a side wall of the base 12 is perpendicular to a plane where the supporting plate 11 is located. The supporting plate 11 is fixedly connected with the base 12, so that the supporting strength of the mounting frame 10 is ensured, and the centering and clamping mechanism is prevented from shaking randomly.

In some embodiments, the mounting bracket 10 may be formed by welding thick-walled seamless steel pipes and thick plates, and annealing the mounting bracket 10 after welding is performed to relax the mounting bracket 10 and ensure the stability of the mounting bracket 10. Wherein, the verticality of the base 12 and the supporting plate 11 should be ensured within 0.5. When the base 12 is machined by a thick-walled seamless steel pipe, the base can be machined by numerical control plasma or linear cutting.

The at least three sets of clamping units 20 are uniformly distributed and installed in the circumferential direction of the mounting frame 10. Specifically, the at least three sets of clamping units 20 are mounted on the supporting plate 11 and are uniformly distributed around the center of the base 12. That is, the central axes of the at least three sets of clamping units 20 are disposed to coincide with the central axis of the mount 10. In an embodiment, the at least three sets of clamping units 20 can clamp or release the corresponding ring 50 in a centering manner. In use, the mounting frame 10 may be mounted centrally with respect to the centre of the drilling machine, i.e. so that the centres of the at least three sets of clamping units 20 are opposite the centre of the drilling machine. The ring 50 is centered and clamped by the at least three groups of clamping units 20, so that the center of the ring 50 can be centered with the center of the drilling machine tool.

As shown in fig. 4, the driving member 30 and the transmission unit 40 are mounted on the mounting frame 10. Specifically, the driving member 30 is mounted on the base 12, and an output shaft 31 of the driving member 30 is disposed coaxially with the base 12. The transmission unit 40 is mounted on the support plate 11, and the transmission unit 40 is coaxially disposed with the mounting frame 10. Meanwhile, the transmission unit 40 is connected between the driving member 30 and the at least three sets of gripper units 20. During operation, the driving member 30 is used for driving the transmission unit 40 to move, so that the transmission unit 40 drives the at least three sets of clamping units 20 to perform synchronous motion, so that the at least three sets of clamping units 20 clamp or release the ring member 50 in a centered manner.

As shown in fig. 1 and 4, in some embodiments, the transmission unit 40 includes a movable seat 41 and at least three swinging members 42. The movable seat 41 is connected to the output shaft 31 of the driving member 30, and the movable seat 41 is disposed coaxially with the output shaft 31. The at least three swinging members 42 are disposed around the movable seat 41, and the at least three swinging members 42 are disposed in one-to-one correspondence with the at least three clamping units 20, respectively, and the swinging members 42 are disposed between the movable seat 41 and the clamping units 20 at the corresponding positions. During operation, the driving element 30 is used to drive the movable seat 41 to move, and the movable seat 41 drives the at least three oscillating elements 42 to synchronously move, and at the same time, the at least three oscillating elements 42 respectively drive the clamping units 20 at corresponding positions to synchronously move, so as to achieve centering clamping or releasing of the ring member 50. It is understood that the synchronized action of the gripping units 20 may refer to the synchronization between the at least three sets of gripping units 20, i.e. the synchronized gripping or the synchronized release of the ring 50.

In the embodiment, the at least three swinging members 42 are identical in structure and installation, and an alternative description thereof is given below.

Referring to fig. 5 again, one end of the swinging member 42 close to the movable seat 41 is rotatably connected with a rolling member 44, and at the same time, the rolling member 44 is rotatably connected with the movable seat 41, thereby realizing the connection between the swinging member 42 and the movable seat 41. The other end of the swinging member 42 is rotatably connected to the corresponding clamp unit 20.

During operation, the ring 50 may be placed in the centering and clamping mechanism such that the center of the ring 50 is positioned substantially corresponding to the center of the mounting bracket 10. The driving member 30 drives the movable seat 41 to move, and the movable seat 41 simultaneously drives the at least three swinging members 42 to move synchronously, so that the at least three groups of clamping units 20 are driven by the at least three swinging members 42 to clamp or release the ring member 50 in a centering manner.

In the process that the driving element 30 drives the movable seat 41 and the swinging member 42 to move, the swinging member 42 and the movable seat 41 are rotatably connected through the rolling member 44, and the rolling member 44 can rotate relative to the swinging member 42 and the movable seat 41, and meanwhile, the swinging member 42 and the clamping unit 20 are rotatably connected. Therefore, during the transmission process of the movable seat 41 and the swinging member 42, the problem of jamming can be avoided through the relative rotation between the components, so that the problem of jamming of the transmission unit 40 during the action process can not occur.

In the prior art, some centering and clamping mechanisms have a spherical structure at one end of the swinging member 42 close to the movable seat 41, and the spherical structure is rotatably connected with the movable seat 41, and the spherical structure is fixedly connected with the swinging member 42. When the ball structure, the swinging member 42 and the movable base 41 are jammed during the operation of the transmission unit 40, the ball structure and the swinging member 42 cannot rotate relatively to each other, and the swinging member 42 cannot be rotated alone to release the jamming, so that the ball structure, the swinging member 42 and the movable base 41 are completely jammed, even if the transmission unit 40 is completely jammed.

In summary, the centering and clamping mechanism provided by the application has the advantages that the problem of blocking is not easy to occur in the transmission unit 40 in the working process, so that the processing efficiency is ensured, and the problem of damage to other parts caused by blocking of the transmission unit 40 can be avoided.

Example two

The embodiment provides a centering and clamping mechanism which can be used for machining large rings such as flanges. It is understood that the present embodiment is a further improvement on the first embodiment.

In some embodiments, as shown in fig. 4, the driving member 30 may be a hydraulic cylinder, and the cylinder body of the hydraulic cylinder is fixedly mounted on the bottom surface of the base 12, i.e. the end of the base 12 away from the supporting plate 11. The piston rod of the hydraulic cylinder is arranged towards one end of the interior of the base 12, i.e. the output shaft 31 of the drive member 30 is arranged towards the interior of the base 12.

The movable seat 41 is fixedly connected to the output shaft 31 of the driving member 30. One end of the output shaft 31 far away from the cylinder body can be fixedly connected with the movable seat 41 through welding, clamping, thread matching and the like. During operation, the driving member 30 is used to drive the movable seat 41 to move along the axial direction of the mounting frame 10, so that the movable seat 41 can perform an elevating motion relative to the mounting frame 10.

In other embodiments, the driving member 30 may also be a motor, a power-driven push rod, or the like, to drive the movable seat 41 to perform the lifting motion relative to the mounting frame 10. It is understood that when the driving member 30 is a motor, the output shaft 31 can be a lead screw, and the output shaft 31 can be connected with the movable seat 41 in a threaded fit manner. Accordingly, the movable seat 41 can be in limit connection with the mounting frame 10 to limit the movable seat 41 to rotate along with the output shaft 31.

In the embodiment, the movable seat 41 and the output shaft 31 are coaxially arranged, so that the movable seat 41 can be kept balanced, and the positions of the movable seat 41 in the circumferential direction are at the same height relative to the mounting frame 10, thereby preventing the movable seat 41 from tilting.

As shown in fig. 4 and 7, in some specific embodiments, the movable seat 41 may also be a cylindrical structure with one side open, and the movable seat 41 covers the open end of the base 12. The output shaft 31 of the driving member 30 passes through the interior of the movable seat 41 and is fixedly connected with the upper end wall of the movable seat 41.

In an embodiment, the outer surface of the circumferential sidewall of the movable seat 41 may be attached to the inner sidewall of the base 12. When the movable seat 41 moves up and down, the movable seat 41 can slide in/out relative to the base 12, and the inner side wall of the base 12 can guide the movement of the movable seat 41, so that the problem that the movable seat 41 inclines is further avoided.

In other embodiments, the movable seat 41 may be provided as a solid cylindrical structure.

As shown in fig. 4, 5 and 7, an annular limiting groove 411 is provided on the outer side wall of the movable seat 41, and the limiting groove 411 is disposed coaxially with the movable seat 41. The depth direction of the stopper groove 411 extends in the radial direction of the movable seat 41. In some embodiments, the limiting slot 411 is disposed at an end of the movable seat 41 away from the opening thereof. In the embodiment, the rolling element 44 is connected in a limiting groove 411 in a limiting manner, so that the connection between the swinging element 42 and the movable seat 41 is realized.

As shown in fig. 1, in the present embodiment, six groups of the clamping units 20 are provided, and the six groups of the clamping units 20 are uniformly distributed around the mounting frame 10, so that all parts of the ring 50 are uniformly stressed. Accordingly, the transmission unit 40 includes six swinging members 42, and the swinging members 42 are provided in one-to-one correspondence with the gripping units 20. In the embodiment, the structures and the mounting manners of the six swinging members 42 are the same, and the structures and the mounting manners of the six sets of clamping units 20 are the same, which will be alternatively described below.

As shown in FIG. 8, the pendulum 42 is in a triangular-like configuration. The swinging member 42 includes a connecting portion 421, a first swinging portion 422, and a second swinging portion 423, the connecting portion 421, the first swinging portion 422, and the second swinging portion 423 are partially provided at three angular positions of the swinging member 42, and the first swinging portion 422 and the second swinging portion 423 are partially provided at both sides of the connecting portion 421.

Referring to fig. 3 to 5 and 7, the connecting portion 421 is rotatably mounted on the supporting plate 11 via the first rotating shaft 43. Specifically, the support seat 111 is disposed at a corresponding position on the support plate 11, and the connection portion 421 is provided with a connection hole 4211 through which the first rotation shaft 43 passes. The connecting portion 421 is rotatably mounted on the supporting seat 111 through the first rotating shaft 43, that is, the swinging member 42 can rotate relative to the supporting plate 11. The connection portion 421 is rotatably mounted to enable the first swing portion 422 and the second swing portion 423 to be linked, that is, when the first swing portion 422 operates, the second swing portion 423 can be driven to operate correspondingly. The plane of the oscillating member 42 is perpendicular to the plane of the support plate 11, and the plane of the oscillating member 42 is arranged in the radial direction of the support plate 11.

The first swing portion 422 is disposed on the side of the swing member 42 close to the movable seat 41, and accordingly, the rolling member 44 is mounted on the first swing portion 422. Specifically, the rolling member 44 is rotatably mounted at the first swing portion 422 through the second rotating shaft 45. A rolling member 44 is provided on each of both sides of the first swinging portion 422 in the thickness direction of the swinging member 42. It is understood that the second rotating shaft 45 is disposed through the swinging member 42, and the two rolling members 44 are respectively mounted on both ends of the second rotating shaft 45. The second rotating shaft 45 is disposed perpendicularly to the swinging member 42. Both rolling members 44 are rotatable with respect to the first swinging portion 422. In some specific embodiments, the rolling members 44 may be rollers.

In other embodiments, the rolling members 44 may also be spherical structures.

In the embodiment, in the radial direction of the rolling member 44, the outer edge of the rolling member 44 is disposed to protrude from the outer edge of the first swinging portion 422. Therefore, when the rolling element 44 is embedded in the limiting groove 411, the outer edge of the rolling element 44 can directly contact the inner wall of the limiting groove 411, so that the outer edge of the first swinging part 422 is prevented from contacting the inner wall of the limiting groove 411, and the first swinging part 422 is prevented from interfering the relative rotation between the rolling element 44 and the limiting groove 411. Thereby, the connection between the first swing portion 422 and the movable base 41 is achieved.

In some embodiments, the upper and lower outer edges of the rolling member 44 contact the corresponding upper and lower inner walls of the retaining groove 411 in the axial direction of the mounting bracket 10. Therefore, when the movable seat 41 moves up and down, the rolling member 44 can be pushed to move up and down synchronously. When the rolling member 44 moves up and down, the rolling member 44 rotates around the first rotating shaft 43, and the vertical distance between the movable seat 41 and the first rotating shaft 43 is not changed, so that the rolling member 44 moves along the radial direction of the movable seat 41. In the embodiment, the spacing groove 411 has a certain depth to provide a space for the rolling member 44 to move in the radial direction of the movable seat 41. When the second rotating shaft 45 and the first rotating shaft 43 rotate to the same horizontal height, the bottom surface of the limiting groove 411 may not contact with the outer edge of the rolling member 44 in a force-free manner or leave a gap, so as to ensure that the swinging member 42 and the movable seat 41 move smoothly. It can be understood that when the movable seat 41 moves to the highest position or the lowest position relative to the mounting frame 10, the rolling member 44 is still embedded in the limiting slot 411, so as to prevent the first swing portion 422 from being disconnected from the movable seat 41.

In the embodiment, six pairs of rolling members 44 connected by six swinging members 42 are all embedded in the same limiting slot 411, and the six pairs of rolling members 44 are uniformly distributed in the limiting slot 411. When the driving member 30 drives the movable seat 41 to move, the six swinging members 42 are driven to move synchronously, and further the six sets of clamping units 20 are driven to move synchronously.

In the embodiment, as shown in fig. 3 and 7, in order to avoid the base 12 interfering with the action of the transmission unit 40, a second avoidance hole 121 is provided at a position of the base 12 corresponding to the swinging member 42 to provide an avoidance space for the movement of the swinging member 42. Further, the support plate 11 is also provided with a first avoidance hole 112, and the first avoidance hole 112 and the second avoidance hole 121 are communicated with each other to avoid the swinging of the swinging member 42 and prevent the support plate 11 from obstructing the movement of the swinging member 42. Accordingly, the supporting seat 111 may be fixedly disposed on the sidewall of the first avoiding hole 112, and the oscillating member 42 is mounted at the position of the first avoiding hole 112 through the supporting seat 111. This ensures smooth operation of the movable holder 41 and the swinging member 42.

Further, a first side surface 424 between the first swing portion 422 and the connecting portion 421 is concave arc-shaped, and a second side surface 425 between the first swing portion 422 and the second swing portion 423 is also concave arc-shaped. Therefore, the movable seat 41 can be prevented from interfering with the swing of the swing member 42, and the problem of the locking of the movable seat 41 and the swing member 42 can be further avoided.

When the driving member 30 drives the movable seat 41 to perform a lifting motion relative to the mounting frame 10, the movable seat 41 can drive the rolling member 44 to perform a synchronous vertical movement, and then the rolling member 44 drives the first swinging portion 422 to perform a vertical movement, and at the same time, the first swinging portion 422 rotates around the first rotating shaft 43. Accordingly, the second swinging portion 423 is driven by the first swinging portion 422 to rotate around the first rotating shaft 43, and the second swinging portion 423 moves in the radial direction of the mounting frame 10. It can be understood that, when the movable seat 41 is actuated, the six swinging members 42 are driven to synchronously actuate.

Further, the second swinging portion 423 of the swinging member 42 is rotatably connected to the clamping unit 20. Specifically, the second swinging portion 423 is provided with an insertion groove 4231, and the insertion groove 4231 has a notch communicated with the outside, and the notch is arranged in a direction away from the first rotating shaft 43. One end of the clamping unit 20 close to the swinging member 42 is fixedly provided with a third rotating shaft 2211, the insertion groove 4231 is inserted and connected with the third rotating shaft 2211, and the inner side wall of the insertion groove 4231 is attached to the outer side wall of the third rotating shaft 2211, so that the second swinging portion 423 drives the third rotating shaft 2211 to move. The third rotating shaft 2211 can rotate in the insertion groove 4231, that is, the swinging member 42 and the third rotating shaft 2211 can rotate relatively. In order to prevent the second swinging portion 423 from being separated from the third rotating shaft 2211 during the operation, at least half of the third rotating shaft 2211 is inserted into the insertion groove 4231 in the radial direction of the third rotating shaft 2211. In a radial direction of the swing arc of the swing member 42, the insertion groove 4231 has a certain length to provide a space for the movement of the third rotation shaft 2211 in the insertion groove 4231.

In the embodiment, the first rotating shaft 43, the second rotating shaft 45 and the third rotating shaft 2211 are modulated during processing to ensure mechanical strength.

In other embodiments, the swinging member 42 may not need to be provided with the connecting portion 421, that is, the swinging member 42 is directly connected between the movable seat 41 and the clamping unit 20, and the transmission may also be realized.

As shown in fig. 2 to 4 and 6, the clamping unit 20 includes a mounting base 21, a sliding frame 22 and a chuck 25. Wherein, one end of the mounting seat 21 is fixedly mounted on the supporting plate 11, and the mounting seat 21 extends along the radial direction of the mounting frame 10. Sliding frame 22 is slidably mounted on mounting base 21, and the sliding direction of sliding frame 22 is arranged along the radial direction of mounting frame 10. Correspondingly, a sliding groove 211 for accommodating the sliding frame 22 is arranged in the mounting seat 21. Mounting block 21 and carriage 22 may each be fabricated from cast steel. During the process of the mounting frame 10, the form and position tolerances of the mounting seat 21 and the sliding frame 22 should be strictly controlled to ensure that the sliding frame 22 can slide smoothly relative to the mounting seat 21, and the sliding frame 22 should be prevented from freely swinging relative to the mounting seat 21 as much as possible. When the centering and clamping mechanism is installed, the bottom surface of the installation seat 21 is attached to the surface of a drilling machine tool, so that the centering precision of the ring 50 is prevented from being influenced by vibration generated by the installation seat 21 in the machining process.

Chuck 25 is disposed on a side of carriage 22 remote from mount 21. Carriage 22 slides relative to mount 21, causing synchronized movement of chuck 25. Wherein the clamping head 25 is used to contact the ring 50 to achieve a centered clamping or release of the ring 50.

In some specific embodiments, the copper plate 252 is disposed around the outside of the clamping head 25, so as to reduce collision damage to the ring 50 and avoid damage to the ring 50 during the centering and clamping process, while ensuring that the centering and clamping accuracy is not affected. During the machining of the clamping heads 25, the clamping heads 25 of the individual clamping units 20 can be milled flat uniformly by means of a milling cutter on the drilling machine.

In the embodiment, a connecting seat 221 is fixedly disposed at one end of the sliding frame 22 close to the mounting frame 10. The third rotating shaft 2211 is disposed on one side of the connecting seat 221 close to the swinging member 42, and the swinging member 42 is rotatably connected to the connecting seat 221 through the third rotating shaft 2211, thereby achieving connection between the swinging member 42 and the sliding frame 22.

When the swinging member 42 swings around the first rotating shaft 43, the second swinging portion 423 moves in the radial direction of the mounting frame 10, and the second swinging portion 423 drives the third rotating shaft 2211 to move in the radial direction of the mounting frame 10, and further drives the sliding frame 22 to move in the radial direction of the mounting frame 10, even if the sliding frame 22 slides relative to the mounting base 21. Accordingly, the movement of the clamping head 25 in the radial direction of the mounting frame 10 can be realized to achieve a centered clamping or release of the ring 50.

In an embodiment, when the second swinging portion 423 drives the third rotating shaft 2211 to move along the radial direction of the mounting frame 10, the third rotating shaft 2211 moves in the radial direction of the swinging arc corresponding to the swinging member 42 because the vertical distance between the third rotating shaft 2211 and the supporting plate 11 is not changed. In the embodiment, the length of the insertion groove 4231 may be set to satisfy the moving range of the third rotating shaft 2211 in the radial direction corresponding to the swing arc of the swing member 42. It will be appreciated that mounting base 21 limits sliding frame 22 in a direction perpendicular to the bottom surface of mounting base 21 to prevent sliding frame 22 from being lifted relative to mounting base 21 by swinging member 42. In some specific embodiments, the mounting seat 21 is provided with a limiting plate for limiting the sliding frame 22 at a side corresponding to the opening of the sliding groove 211, so as to prevent the sliding frame 22 from being lifted.

As shown in fig. 9 and 10, during operation, when the driving element 30 drives the movable seat 41 to move up and down, the swinging element 42 is driven to rotate around the first rotating shaft 43, so that the second swinging portion 423 drives the third rotating shaft 2211 to move in the radial direction of the mounting block 10. That is, the sliding frame 22 is driven to slide along the mounting seat 21, so that the sliding frame 22 drives the chuck 25 to move along the radial direction of the mounting frame 10, and the chuck 25 is moved close to or away from the central axis of the mounting frame 10, so as to clamp or release the ring 50 in a centering manner.

As shown in fig. 6, 9 and 10, the clamping unit 20 further includes a driving assembly 23 and a transmission rod 24 disposed in the sliding frame 22, and a mounting groove 222 for receiving the driving assembly 23 and the transmission rod 24 is disposed in the sliding frame 22. The drive link 24 is connected between the drive assembly 23 and the chuck 25, and the drive assembly 23 is adapted to drive the drive link 24 to move so as to move the chuck 25 relative to the carriage 22. The chuck 25 is disposed along a radial direction of the mounting frame 10 with respect to the moving direction of the carriage 22. It will be appreciated that the side of the mounting slot 222 adjacent the clip 25 is open to facilitate connection of the clip 25 to the actuator rod 24. In one embodiment, since the driving assembly 23 is disposed in the sliding frame 22, the driving assembly 23 can move along with the sliding frame 22, accordingly, the wires connected to the driving assembly 23 also need to follow, and the wires connected to the driving assembly 23 can be selected from a winding type flexible wire.

In some specific embodiments, the driving assembly 23 includes a stepping motor 231 and a speed reducer 232, and accordingly, the transmission rod 24 may be a screw rod. The speed reducer 232 is connected between the stepping motor 231 and the transmission rod 24, and an output shaft of the speed reducer 232 is arranged coaxially with the transmission rod 24. The chuck 25 can be in threaded engagement with the transmission rod 24, and the opening structure of the mounting groove 222 can limit the chuck 25 to prevent the chuck 25 from rotating synchronously with the transmission rod 24, so that the transmission rod 24 drives the chuck 25 to move along the sliding frame 22. The fit clearance between the chuck 25 and the opening structure of the mounting groove 222 is set to be 0.2-0.5 mm, so that the chuck 25 can slide smoothly relative to the sliding frame 22, and the repeated positioning accuracy of the chuck 25 can be ensured.

In some embodiments, the driving connection between the collet 25 and the driving rod 24 can be achieved by a driving sleeve 26. Specifically, the transmission sleeve 26 is sleeved on the transmission rod 24, and the transmission sleeve 26 is in threaded fit connection with the transmission rod 24. The end of the chuck 25 near the sliding frame 22 is provided with a connecting sleeve 251, and the connecting sleeve 251 is fixedly sleeved on the transmission sleeve 26. In operation, drive assembly 23 rotates drive rod 24 to move chuck 25 along carriage 22 under the threaded engagement of drive sleeve 26 with drive rod 24 and the constraint of carriage 22 against chuck 25. In use, a user can adjust the position of the clamping head 25 on the sliding frame 22, namely the distance between the clamping head 25 and the central axis of the mounting frame 10, according to needs, so that the centering and clamping mechanism is suitable for the ring 50 with a larger diameter variation range, and the universality of the centering and clamping mechanism is improved. Meanwhile, the calibration of the positions of the chucks 25 can be performed so that the initial positions of the chucks 25 of the six groups of gripping units 20 are located on the same circumference.

In some specific embodiments, the driving sleeve 26 is a half-nut, i.e., half of the thread is provided in the circumferential direction of the driving sleeve 26. Therefore, the scraps between the transmission sleeve 26 and the transmission rod 24 can be discharged conveniently, and the smooth transmission of the transmission sleeve 26 and the transmission rod 24 is prevented from being influenced. In the embodiment, the fit clearance between the transmission rod 24 and the transmission sleeve 26 is set to be 0.2-0.5 mm, so that the repeated positioning precision of the transmission rod 24 and the transmission sleeve 26 can be ensured while smooth transmission is ensured, namely the repeated positioning precision of the chuck 25 is further ensured.

Of course, in other embodiments, it is not excluded that the driving sleeve 26 is selected from a ball screw nut, a nut sleeve, etc.

In other embodiments, the collet 25 may be directly drivingly connected to the drive rod 24.

In other embodiments, the driving assembly 23 may also be driven by an electric push rod, an air cylinder, a hydraulic cylinder, or the like to move the chuck 25 relative to the sliding frame 22, i.e., to adjust the distance from the chuck 25 to the central axis of the centering and clamping mechanism.

As shown in fig. 4, a plurality of sliding bearings 223 are further disposed at intervals in the mounting groove 222 of the sliding frame 22. The sliding bearing 223 is used to provide a corresponding limiting supporting function for the transmission rod 24, so as to prevent the transmission rod 24 from generating a centrifugal motion, so as to ensure that the transmission rod 24 smoothly drives the chuck 25 to move, and ensure the working precision of the centering and clamping mechanism.

In one embodiment, the end of the transmission rod 24 away from the driving assembly 23 is provided with a non-circular through hole for connecting a tool such as a wrench, and the initial position of the chuck 25 can be finely adjusted by rotating the transmission rod 24 through an external tool, so as to calibrate the position of the chuck 25. The chuck 25 can also be mounted in place on carriage 22 by manually rotating drive link 24 during assembly of the centering and clamping mechanism.

Of course, in other embodiments, the end of the transmission rod 24 remote from the driving assembly 23 can also be provided with a non-circular outer profile for engaging a corresponding tool such as a wrench to effect rotation of the transmission rod 24 to adjust the position of the collet 25.

In an embodiment, the clamping unit 20 may further include a cover plate 27, and the cover plate 27 is covered on the mounting seat 21 and is disposed at a position corresponding to the driving assembly 23, so as to protect the driving assembly 23.

In other embodiments, the clamping units 20 may be arranged in three, four, five, seven, eight, etc. groups, and the clamping units 20 are evenly spaced among the groups. The swinging members 42 are provided in the same number as the number of the gripper units 20.

It will be appreciated that in the embodiment, the centering and clamping mechanism may further include a controller (not shown), and the driving member 30 and the driving assembly 23 in each group of clamping units 20 are electrically connected to the controller, so that the controller controls the actions of the components.

Of course, in other embodiments, each electrical component of the centering and clamping mechanism may be directly connected to the control mechanism of the ring machining apparatus, and the control mechanism may perform unified control.

The distance of the collet 25 from the central axis of the mounting bracket 10 is adjusted according to the size of the ring 50. Thus, the clip 25 can be made to act on the ring 50 while the clip 25 is being clamped in a centered manner. Specifically, the controller may control the driving assemblies 23 in each group of clamping units 20 to perform synchronous operations, so that the chucks 25 simultaneously approach or move away from the central axis of the mounting frame 10, and the moving distances of the chucks 25 are equal, so as to ensure that the distance from each chuck 25 to the central axis of the mounting frame 10 is always equal. When a deviation occurs in each chuck, the operation of the deviated clamping unit 20 may be independently controlled so that the chuck 25 on the clamping unit 20 is located on the same circumference as each of the other chucks 25. During the process, the driving rod 24 can be rotated by a wrench or the like to finely adjust the positions of the chucks 25 so that the distance from each chuck 25 to the central axis of the mounting frame 10 is equal.

When the ring 50 is centered and clamped, the ring 50 may be placed on the side of the chuck 25 away from the central axis of the mounting frame 10, i.e. on the outer side of the chuck 25, and the central axis of the ring 50 is substantially aligned with the central axis of the mounting frame 10. Subsequently, the first driving member 30 is activated to gradually lift the movable seat 41 relative to the mounting frame 10, so as to drive the swinging member 42 to swing around the first rotating shaft 43. Meanwhile, the second swinging portion 423 gradually rotates toward the direction approaching the supporting plate 11, and pushes the sliding frame 22 to move toward the direction away from the central axis of the mounting frame 10, i.e., drives the chuck 25 to gradually move toward the direction away from the central axis of the mounting frame 10. During this time, the collet 25, which was first in contact with the ring 50, pushes the ring 50 in this direction to adjust the position of the central axis of the ring 50. When all the clamping heads 25 are tightly pressed against the ring 50, which indicates that the ring 50 has been clamped in the center, the driving member 30 can be stopped to maintain the corresponding clamping action between the clamping heads 25 and the ring 50. The ring 50 can then be correspondingly drilled. When the ring member 50 needs to be removed, the ring member 50 can be released by controlling the driving member 30 to reversely move.

In one embodiment, the controller can control the stroke of the driving member 30 according to the diameter of the ring 50 to avoid excessive or insufficient force applied to the ring 50 by the collet 25. Of course, the size of the ring 50 may be set in advance in the controller.

In other embodiments, the force between the collet 25 and the ring 50 may also be sensed by providing a corresponding pressure sensor. When the acting force between the clamping head 25 and the ring member 50 reaches a set value, the pressure sensor can feed back information to the controller, and the controller controls the driving member 30 to stop acting, so that excessive or insufficient acting force exerted on the ring member 50 by the clamping head 25 is avoided.

In other embodiments, the ring 50 may be placed on the side of the clip 25 near the center axis of the mounting bracket 10, i.e., on the inside of the clip 25. When the ring 50 is centered and clamped, the driving member 30 is first controlled to move the chuck 25 a distance away from the central axis of the mounting frame 10, so as to place the ring 50 inside the chuck 25. The ring 50 is placed inside the collet 25 with the central axis of the ring 50 generally aligned with the central axis of the mounting bracket 10. The driver 30 is actuated in a reverse direction to move each chuck 25 gradually toward the central axis of the mounting frame 10. During this time, the collet 25, which was first in contact with the ring 50, pushes the ring 50 to move toward the opposite side so that the central axis of the ring 50 moves toward the central axis of the mounting bracket 10. When all the clamping heads 25 are in contact with the ring 50 to be clamped, the ring 50 is centered with the mounting frame 10, and the clamping heads 25 clamp the ring 50.

In conclusion, the centering and clamping mechanism provided by the application can realize automatic centering and clamping of the ring 50, and is simple to operate, so that the machining efficiency of the ring 50 is improved. Meanwhile, the ring 50 can be clamped and fixed through the clamping head 25, so that the process of fixing the ring 50 through other structures can be omitted, and the processing time is further saved. In addition, through the arrangement of the driving assembly 23 and the transmission rod 24, the position of the clamping head 25 on the sliding frame 22 can be adjusted, so that the centering and clamping mechanism is suitable for centering and clamping a wider range of ring members 50, and has higher universality.

EXAMPLE III

The embodiment provides a ring piece machining device which comprises the centering and clamping mechanism provided in the first embodiment or the second embodiment. Of course, the ring machining apparatus may further include one or more of a drilling mechanism, a milling mechanism, and the like.

Wherein the milling mechanism can perform milling on the ring 50. The centering and clamping mechanism can be installed on a machine tool of the drilling mechanism to perform centering and clamping on the ring 50, so that the drilling mechanism can perform drilling processing on a specific position of the ring 50.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A centering and clamping mechanism is used for centering and clamping a ring piece and is characterized by comprising a mounting frame, a driving piece, a transmission unit and at least three groups of clamping units; the at least three groups of clamping units are uniformly distributed and installed in the circumferential direction of the installation rack; the transmission unit is connected between the driving piece and the at least three groups of clamping units;

2. The centering and clamping mechanism as claimed in claim 1, wherein said oscillating member includes a connecting portion, a first oscillating portion and a second oscillating portion, said first oscillating portion and said second oscillating portion being provided on both sides of said connecting portion;

3. The centering and clamping mechanism as claimed in claim 1 or 2, wherein a limiting groove is circumferentially arranged on the movable seat, and the limiting groove is coaxially arranged with the at least three groups of clamping units; the rolling piece rolls and is limited in the limiting groove.

4. The centering and clamping mechanism as claimed in claim 1, wherein said clamping unit comprises a mounting seat, a sliding frame and a clamping head, wherein said sliding frame is slidably mounted in said mounting seat, and the sliding direction of said sliding frame is arranged along the radial direction of said mounting seat; the chuck is arranged on one side, far away from the mounting seat, of the sliding frame;

5. The centering and clamping mechanism as claimed in claim 4, wherein said clamping unit further comprises a driving assembly and a transmission rod disposed in said sliding frame, said transmission rod being in transmission connection with said driving assembly and said collet, respectively;

6. The centering and clamping mechanism as claimed in claim 5, wherein said drive assembly comprises a stepper motor, said drive rod being in threaded drive connection with said collet; the sliding frame is used for limiting the chuck to rotate in the circumferential direction of the transmission rod;

7. The centering and clamping mechanism as claimed in claim 6, wherein said collet is drivingly connected to said drive rod through a drive sleeve, said drive sleeve being threadedly engaged with said drive rod, said collet being fixedly connected to said drive sleeve.

8. The centering and clamping mechanism as claimed in claim 7, wherein said drive sleeve is a half nut.

9. The centering and clamping mechanism as claimed in claim 4, wherein a copper plate is disposed around the outside of said collet, said copper plate serving to reduce the impact of said collet on said ring.

10. A ring machining apparatus comprising the centering and clamping mechanism of any one of claims 1 to 9.