CN215091179U

CN215091179U - Clamp apparatus

Info

Publication number: CN215091179U
Application number: CN202120714711.0U
Authority: CN
Inventors: 袁保政; 管采薇; 朱顺利
Original assignee: Suzhou Microport Orthopedic Instruments Co ltd
Current assignee: Suzhou Microport Orthopedic Instruments Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-12-10
Anticipated expiration: 2031-04-08

Abstract

The utility model provides a clamp, which comprises a driving disc, a base disc and a plurality of clamping parts; the driving disc is rotatably and coaxially arranged relative to the base disc, and the plurality of clamping parts are circumferentially arranged around the base disc; the base plate is provided with a plurality of first limiting grooves and a plurality of second limiting grooves, and the plurality of first limiting grooves and the plurality of second limiting grooves are distributed around the circumference of the base plate respectively; the clamping part is provided with a first guide part and a second guide part, the first guide part is limited in the first limiting groove to move along the extending direction of the first limiting groove, and the second guide part is limited in the second limiting groove to move along the extending direction of the second limiting groove; the driving disc is provided with a plurality of third limiting grooves which are distributed around the circumference of the driving disc; the first guide part is also limited in the third limiting groove to move along the extending direction of the third limiting groove; when the driving disc rotates, the driving disc drives the first guide part through the third limiting groove, so that the clamping part moves away from or close to the center of the base disc.

Description

Clamp apparatus

Technical Field

The utility model relates to a machining tool technical field, in particular to anchor clamps.

Background

When a fine hole is processed on a slender rod piece by wire feeding, a traditional mode is that a workpiece to be processed is directly fixed on a V-shaped block, and then the V-shaped block is fixed on a machine tool for processing. Because in the precision hole machining process, the number of the V-shaped blocks is limited, the straightness of the longer slender rod piece in the clamping process is not easy to control, the difficulty of controlling the precision by a worker in clamping is increased, and therefore hole precision errors caused by the change of the clamping position are generated, and the products are scrapped in machining. In addition, in the process of wire moving processing, because of the small diameter of the slender rod piece, the clamping of the V-shaped block and the rod piece are generally in line contact, the clamping is not firm enough, and the hole processing error is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anchor clamps to solve the higher problem of the centre gripping degree of difficulty of slim member in the current processing of walking the silk.

In order to solve the technical problem, the utility model provides an anchor clamps for walk a processing, it includes: the device comprises a driving disc, a base disc and a plurality of clamping parts;

the driving disk is rotatably and coaxially arranged relative to the base disk, and a plurality of clamping parts are circumferentially arranged around the base disk;

the base plate is provided with a plurality of first limiting grooves and a plurality of second limiting grooves, and the plurality of first limiting grooves and the plurality of second limiting grooves are distributed around the circumferential direction of the base plate respectively;

the clamping part is provided with a first guide part and a second guide part, the first guide part is limited to move in the first limiting groove along the extending direction of the first limiting groove, and the second guide part is limited to move in the second limiting groove along the extending direction of the second limiting groove;

the driving disc is provided with a plurality of third limiting grooves which are distributed around the circumferential direction of the driving disc; the first guide part is also limited in the third limiting groove to move along the extending direction of the third limiting groove; when the driving disc rotates, the driving disc drives the first guide part through the third limiting groove, so that the clamping part moves away from or close to the center of the base disc.

Optionally, in the fixture, the first limiting groove is located outside the second limiting groove.

Optionally, in the fixture, each first limiting groove corresponds to one second limiting groove, the corresponding first limiting groove and the corresponding second limiting groove form a limiting groove group, and an extending direction of the first limiting groove and an extending direction of the second limiting groove in the same limiting groove group are arranged at an angle.

Optionally, in the fixture, the extending direction of the first limiting groove of one limiting groove group passes through the second limiting groove of the adjacent limiting groove group.

Optionally, in the fixture, an extending direction of the first limiting groove and an extending direction of the third limiting groove are arranged at an angle, and the extending direction of the third limiting groove does not pass through the center of the driving disk.

Optionally, in the fixture, the second limiting groove includes a first section and a second section that are communicated with each other, a connection line between an end point of the first section, which is far away from the center of the base plate, and the center of the base plate is taken as a first reference line, an extending direction of the first section and the first reference line form a first included angle, an extending direction of the second section and the first reference line form a second included angle, and the first included angle is smaller than the second included angle; the third limiting groove comprises a third section and a fourth section which are communicated, the end point of the third section, which is far away from the center of the driving disc, is connected with the center of the driving disc to form a second reference line, the extending direction of the third section and the second reference line form a third included angle, the extending direction of the fourth section and the second reference line form a fourth included angle, and the third included angle is smaller than the fourth included angle.

Optionally, in the clamp, an extending direction of the first section and an extending direction of the second section form an obtuse angle; the extending direction of the third section and the extending direction of the fourth section form an obtuse angle.

Optionally, in the clamp, the second section is located on one of a clockwise side and a counterclockwise side of the first section, and the fourth section is located on the other of the clockwise side and the counterclockwise side of the third section.

Optionally, in the fixture, the first guide portion includes two first bearings coaxially connected, one of the two first bearings slides in the first limiting groove, and the other of the two first bearings slides in the third limiting groove; the second guide portion includes a second bearing, and an axis of the first bearing and an axis of the second bearing are both parallel to an axis of the base plate.

Optionally, the fixture comprises at least two base discs arranged at intervals in the axial direction and at least two driving discs arranged at intervals in the axial direction; and each base disc is correspondingly connected with one driving disc.

Optionally, the fixture further includes a bottom plate and a connecting member, the base plate is fixedly connected to the bottom plate, one end of the connecting member is rotatably connected to the driving plate, the other end of the connecting member is movably connected to the bottom plate, and the connecting member is used for driving the driving plate to rotate through the movement of the connecting member relative to the bottom plate.

Optionally, the fixture further comprises a first locking nut and a second locking nut, a through hole is formed in the bottom plate, the connecting piece is movably arranged in the through hole in a penetrating mode along the axial direction of the connecting piece, the first locking nut and the second locking nut are respectively in threaded connection with the connecting piece, and the first locking nut and the second locking nut are respectively located on two sides of the through hole and used for locking the position, relative to the through hole, of the connecting piece along the axial direction of the connecting piece.

To sum up, the clamp provided by the utility model comprises a driving disc, a base disc and a plurality of clamping parts; the driving disk is rotatably and coaxially arranged relative to the base disk, and a plurality of clamping parts are circumferentially arranged around the base disk; the base plate is provided with a plurality of first limiting grooves and a plurality of second limiting grooves, and the plurality of first limiting grooves and the plurality of second limiting grooves are distributed around the circumferential direction of the base plate respectively; the clamping part is provided with a first guide part and a second guide part, the first guide part is limited to move in the first limiting groove along the extending direction of the first limiting groove, and the second guide part is limited to move in the second limiting groove along the extending direction of the second limiting groove; the driving disc is provided with a plurality of third limiting grooves which are distributed around the circumferential direction of the driving disc; the first guide part is also limited to move in the third limiting groove along the extending direction of the third limiting groove; when the driving disc rotates, the third limiting groove drives the first guide part to enable the clamping part to move away from or close to the center of the base disc.

According to the configuration, the driving disc rotates during use, the plurality of clamping parts can be driven to synchronously move away from or close to the center of the base disc, so that the clamping process of the rod piece is a self-centering clamping process, and the straightness of the rod piece with a larger major diameter can be adjusted. Furthermore, the clamping of the plurality of clamping parts to the rod piece is in surface contact, the positioning mode is high in precision and high in stability, and the defect that the clamping precision of the V-shaped block is low in the prior art is overcome.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

fig. 1 is a schematic view of a clamp according to an embodiment of the present invention;

fig. 2 is a schematic view of another angle of a clamp according to an embodiment of the present invention;

fig. 3 is an exploded view of a clamp according to an embodiment of the present invention;

fig. 4 is a schematic view of a base plate according to an embodiment of the present invention;

FIG. 5 is a schematic view of an active disk according to an embodiment of the present invention;

fig. 6 is a schematic view of a single clamping portion of an embodiment of the invention;

fig. 7 is a schematic view of a combination of a plurality of holding portions according to an embodiment of the present invention.

In the drawings:

1-a control panel; 2-driving disk; 21-a third limiting groove; 211-third section; 212-a fourth section; 22-a stop block; 3-a gasket; 4-a bearing ring; 5-a first guide; 51-a first bearing; 52-a second bearing; 6-a basal disc; 61-a base plate; 62-a locking plate; 63-a second limiting groove; 631 — a first section; 632-a second section; 64-a first restraint slot; 65-a through hole; 7-a clamping part; 711-clamping bar; 712-a support bar; 8-a pin; 9-a connector; 10-positioning a rod; 11-a first locking nut; 12-locking a clamp spring; 13-a second lock nut; 14-second guide.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a", "an" and "the" are generally employed in a sense including "at least one", the terms "at least two" and "two or more" are generally employed in a sense including "two or more", and moreover, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that there is a number of technical features being indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "proximal end" and "distal end" generally refer to the corresponding two parts, which include not only the end points, but also the terms "mounted", "connected" and "connected" should be understood broadly, e.g., as a fixed connection, as a detachable connection, or as an integral part; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present application, the disposition of an element with another element generally only means that there is a connection, coupling, fit, or drive relationship between the two elements, and the connection, coupling, fit, or drive between the two elements may be direct or indirect through intermediate elements, and is not to be understood as indicating or implying any spatial relationship between the two elements, i.e., an element may be in any orientation within, outside, above, below, or to one side of another element unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following description refers to the accompanying drawings.

Please refer to fig. 1 to 7, wherein fig. 1 is a schematic view of a clamp according to an embodiment of the present invention; fig. 2 is a schematic view of another angle of a clamp according to an embodiment of the present invention; fig. 3 is an exploded view of a clamp according to an embodiment of the present invention; fig. 4 is a schematic view of a base plate according to an embodiment of the present invention; FIG. 5 is a schematic view of an active disk according to an embodiment of the present invention; fig. 6 is a schematic view of a single clamping portion of an embodiment of the invention; fig. 7 is a schematic view of a combination of a plurality of holding portions according to an embodiment of the present invention.

As shown in fig. 1 to 7, an embodiment of the present invention provides a clamp for wire-moving processing, such as slow wire-moving processing, for clamping a slender rod. The jig includes: a driving disk 2, a base disk 6 and a plurality of clamping parts 7; the driving disk 2 is rotatably coaxially arranged with respect to the base disk 6, and a plurality of the clamping portions 7 are circumferentially arranged around the base disk 6; the base plate 6 is provided with a plurality of first limiting grooves 64 and a plurality of second limiting grooves 63, and the plurality of first limiting grooves 64 and the plurality of second limiting grooves 63 are respectively arranged around the circumference of the base plate 6; the clamping part 7 is provided with a first guide part 5 and a second guide part 14, the first guide part 5 is limited in the first limit groove 64 to move along the extending direction of the first limit groove 64, and the second guide part 14 is limited in the second limit groove 63 to move along the extending direction of the second limit groove 63; the driving disc 2 is provided with a plurality of third limiting grooves 21, and the plurality of third limiting grooves 21 are distributed around the circumferential direction of the driving disc 2; the first guide part 5 is also limited to move in the third limiting groove 21 along the extending direction of the third limiting groove 21; when the driving disc 2 rotates, the driving disc 2 drives the first guide part 5 through the third limiting groove 21, so that the clamping part 7 moves away from or close to the center of the base disc 6.

According to the configuration, the driving disc 2 rotates during use, the clamping parts 7 can be driven to synchronously move away from or close to the center of the base disc 6, so that the clamping process of the rod piece is a self-centering clamping process, and the straightness of the rod piece with a larger major diameter can be adjusted. In an alternative embodiment, the clamping portion 7 may for instance comprise a clamping block, the shape of which may be arranged according to practice. Furthermore, the clamping of the plurality of clamping parts 7 on the rod piece is in surface contact, the positioning mode is high in precision and high in stability, and the defect that the clamping precision of the V-shaped block is low in the prior art is overcome.

Optionally, the fixture further includes a bottom plate 61 and a connecting member 9, the base plate 6 is fixedly connected to the bottom plate 61, one end of the connecting member 9 is rotatably connected to the driving plate 2, the other end of the connecting member 9 is movably connected to the bottom plate 61, and the connecting member 9 is configured to drive the driving plate 2 to rotate through its own movement relative to the bottom plate 61. Referring to fig. 2 to 5, in an exemplary embodiment, the driving disk 2 is rotatably connected to the base disk 6 through a bearing ring 4, and the bearing ring 4 may be installed between the driving disk 2 and the base disk 6, and is positioned and clamped by a pin or a bolt, for example, preferably, as shown in fig. 5, a plurality of stoppers 22 are disposed on the periphery of the driving disk 2, and the stoppers 22 may limit no circumferential freedom after the driving disk 2 is connected to the bearing ring 4, so that the driving disk 2 is smoothly and rotatably connected to the base disk 6 through the bearing ring 4.

Further, the fixture further comprises a first locking nut 11 and a second locking nut 13, a through hole 65 is formed in the bottom plate 61, the connecting piece 9 is movably arranged in the through hole 65 in a penetrating mode along the axial direction of the connecting piece, the first locking nut 11 and the second locking nut 13 are respectively in threaded connection with the connecting piece 9, and the first locking nut 11 and the second locking nut 13 are respectively located on two sides of the through hole 65 and used for locking the position, relative to the through hole 65, of the connecting piece 9 along the axial direction of the connecting piece.

Optionally, the fixture includes a control panel 1, the driving panel 2 is connected to the control panel 1 and is restricted from relative circumferential rotation, for example, the driving panel 2 is fixed to the control panel 1 through a pin hole or an interference fit, so that after the control panel 1 and the driving panel 2 are assembled, the two do not have relative circumferential rotation. Further, the washer 3 is coupled to the base plate 6 by a bolt, and the washer 3 serves to block the outer race of the bearing ring 4, thereby preventing the control disk 1 and the driving disk 2 from falling off.

With the above configuration, it can be understood that when the control disk 1 rotates, the driving disk 2 can be driven to rotate around the center of the base disk 6. Further, control panel 1 still is connected with locating lever 10, and optionally, locating lever 10 accessible locking jump ring 12 is connected with control panel 1, makes locating lever 10 do not have axial displacement for control panel 1, can avoid locating lever 10 to deviate from control panel 1. Further, the base plate 61 includes a locking plate 62, and the locking plate 62 has a through hole 65; the through hole 65 is used for the connecting piece 9 to wear to establish, and the one end of connecting piece 9 is the screw rod, and its through hole 65 of wearing to locate on the locking plate 62 to accessible first lock nut 11 and second lock nut 13 lock in on the locking plate 62, through adjusting first lock nut 11 and second lock nut 13, can adjust the axial position of connecting piece 9 for the locking plate 62. The other end of connecting piece 9 is the sleeve, and it rotationally overlaps on locating lever 10, so the configuration, after loosening first lock nut 11 and second lock nut 13, can adjust connecting piece 9 for the axial position of through-hole 65, and then through the drive of locating lever 10, can drive control panel 1 and rotate around the center of basal disc 6. Further, by locking the first lock nut 11 and the second lock nut 13, the circumferential position of the control disk 1 with respect to the base disk 6 can be fixed. It will be appreciated that since the positioning rod 10, when rotating with the control disc 1, will be displaced in the radial direction of the connecting piece 9 in addition to being displaced in the axial direction of the connecting piece 9, the through hole in the locking plate 62 may accordingly be provided as a kidney-shaped hole, the long axis of which is arranged in a direction parallel to the control disc 1.

Preferably, the clamp comprises at least two base disks 6 arranged at intervals along the axial direction and at least two driving disks 2 arranged at intervals along the axial direction; each base disc 6 is correspondingly connected with one driving disc 2. It should be noted that the number of the base disks 6 and the driving disks 2 is not particularly limited in this embodiment. In the exemplary embodiment shown in fig. 2, the jig includes two base disks 6 and two driving disks 2, and the two base disks 6 are coaxially fixed to a base plate 61 at a spacing. The two driving disks 2 are rotatably connected with the two base disks 6 through two bearing rings 4. Further, the fixture comprises two control discs 1, two driving discs 2 are respectively connected with different control discs 1, and the two control discs 1 are connected with the same positioning rod 10, so that the control discs 1 (and the driving discs 2 correspondingly connected with the control discs) synchronously rotate around the center of the base disc 6.

Referring to fig. 4, optionally, the first limiting groove 64 is located outside the second limiting groove 63. Here, the outer side means a larger distance from the center of the base plate 6. Specifically, the first limit groove 64 is located outside the second limit groove 63, which means that the distance between the first limit groove 64 and the center of the base plate 6 is greater than the distance between the second limit groove 63 and the center of the base plate 6. Preferably, each first limiting groove 64 corresponds to one second limiting groove 63, the corresponding first limiting groove 64 and the corresponding second limiting groove 63 form a limiting groove group, and the extending direction of the first limiting groove 64 and the extending direction of the second limiting groove 63 in the same limiting groove group are arranged at an angle. When one clamping part 7 is assembled with the base disc 6, the first guide part 5 and the second guide part 14 of the same clamping part 7 are respectively arranged in the first limiting groove 64 and the second limiting groove 63 of the same limiting groove group. With this configuration, since the distance between the first guide portion 5 and the second guide portion 14 of the clamping portion 7 is fixed, when the first guide portion 5 moves in the extending direction of the first stopper groove 64, the clamping portion 7 rotates about its own axial direction (the axial direction of the clamping portion 7 is parallel to the axial direction of the base plate 6) in addition to moving in the radial direction of the base plate 6 based on the stopper of the second stopper groove 63 with respect to the second guide portion 14. Therefore, the clamping part 7 can gradually get close to the center of the base plate 6 or get away from the center of the base plate 6 at an inclined angle instead of only moving along the radial direction of the base plate 6, so that the surface contact between the clamping part 7 and the clamped rod piece is facilitated, and the clamping stability is improved.

In an alternative embodiment, the first position-limiting groove 64 of one position-limiting groove group extends in the direction past the second position-limiting groove 63 of the adjacent position-limiting groove group. With such a configuration, the plurality of clamping portions 7 are sequentially and obliquely arranged to form an arrangement mode as shown in fig. 7, which is beneficial to reducing the resistance of the driving disk 2 to drive the clamping portions 7, is also beneficial to the surface contact between the clamping portions 7 and the clamped rod pieces, and improves the clamping stability. Preferably, the extending direction of the first limit groove 64 passes through the center of the base plate 6.

Referring to fig. 6, in an exemplary embodiment, the first guiding portion 5 includes two first bearings 51 coaxially connected, one of the two first bearings 51 slides in the first limiting groove 64, and the other of the two first bearings 51 slides in the third limiting groove 21; the second guide portion 14 includes a second bearing 52, and the axis of the first bearing 51 and the axis of the second bearing 52 are both parallel to the axis of the base plate 6. In an exemplary embodiment, the clamping portion 7 further includes two clamping rods 711 and a supporting rod 712, the two clamping rods 711 are respectively connected to two ends of the supporting rod 712, and the first bearing 51 is rotatably mounted on an end of the clamping rod 711 far from the supporting rod 712 through a pin 8. The clamping rod 711 and the support rod 712 may be an integral piece, or may be provided as separate pieces, and assembled together by a fastening means, such as a snap. In other embodiments, the support rod 712 may be configured as a telescopic structure to adapt to different pitches of the base plate 6, and thus to clamp rods of different lengths.

Preferably, the extending direction of the first limiting groove 64 and the extending direction of the third limiting groove 21 form an angle, and the extending direction of the third limiting groove 21 does not pass through the center of the driving disk 2, so that a certain included angle is formed between the third limiting groove 21 and the radial direction of the driving disk 2. With this configuration, when the driving disk 2 rotates, the relatively inclined third limiting groove 21 can generate a component force to the first guide part 5 along the radial direction of the driving disk 2, so as to drive the first guide part 5 to move along the first limiting groove 64.

The following describes the usage and principle of the clamp provided by this embodiment with reference to fig. 3.

When clamping is needed, a rod piece needing to be clamped can be inserted into a plurality of hollow channels formed by the enclosing of the clamping parts 7 along the axial direction of the base plate 6, and then the positioning rod 10 is pulled in the direction (upwards in figure 3) far away from the bottom plate 61, so that the control disc 1 rotates along the anticlockwise direction in figure 3, and the driving disc 2 matched with the control disc is driven to rotate along with the control disc. One of the two first bearings 51 of the first guide part 5 moves inwards on the third limiting groove 21, meanwhile, the other of the two first bearings 51 is forced to follow the first limiting groove 64, the second bearing 52 of the second guide part 14 is driven to move inwards on the second limiting groove 63, and based on the angles of the first limiting groove 64 and the second limiting groove 63, the clamping part 7 moves inwards and folds gradually, so that rod clamping is realized. Preferably, after clamping the bar, the clamp maintains the grip on the bar by tightening the first and

second lock nuts

11 and 13. When relaxation is required: the second locking nut 13 is first loosened or removed, pulling the securing lever 10 in the direction of the base plate 61 (downward in fig. 3) while loosening the first locking nut 11 in the opposite direction (direction toward the connecting member 9). The positioning rod 10 drives the control panel 1 to rotate clockwise in fig. 3, and the clamping portion 7 gradually moves outward, so as to loosen the clamping of the rod.

Referring to fig. 4 and 5, in a preferred embodiment, the second position-limiting groove 63 includes a first section 631 and a second section 632 that are connected to each other, a connection line between an end point of the first section 631 away from the center of the base plate 6 and the center of the base plate 6 is a first reference line, an extending direction of the first section 631 forms a first included angle with the first reference line, an extending direction of the second section 632 forms a second included angle with the first reference line, and the first included angle is smaller than the second included angle; correspondingly, the third limiting groove 21 includes a third section 211 and a fourth section 212 that are communicated with each other, and a connecting line between an end point of the third section 211 that is far away from the center of the driving disk 2 and the center of the driving disk 2 is a second reference line, a third included angle is formed between the extending direction of the third section 211 and the second reference line, a fourth included angle is formed between the extending direction of the fourth section 212 and the second reference line, and the third included angle is smaller than the fourth included angle. The second limit groove 63 is divided into an angled first section 631 and a second section 632, and the third limiting groove 21 is divided into an angled third section 211 and a fourth section 212, when the second guide portion 14 is located at the first section 631 with respect to the same angle of rotation of the driving disk 2, the amount of movement of the clamping portion 7 is large, and when the second guide portion 14 is located at the second section 632, the amount of movement of the clamping portion 7 is small, so configured, if the driving disk 2 is rotated at a constant speed, when the clamping part 7 clamps the rod piece, the clamping part 7 can approach the rod piece at a larger speed in the initial period to form primary clamping of the rod piece, after the clamping part 7 approaches the rod, the second guide part 14 enters the second section 632 from the first section 631, the first guide part 5 enters the fourth section 212 from the third section 211, and the clamping part 7 can continue to clamp at a smaller speed, so that the clamping precision and stability are improved. Based on the above principle, the second limiting groove 63 is substantially J-shaped, the long handle thereof is the first section 631, and the short hook portion thereof is the second section 632.

Further, the extending direction of the first section 631 forms an obtuse angle with the extending direction of the second section 632; the extending direction of the third section 211 and the extending direction of the fourth section 212 form an obtuse angle to reduce the resistance of the second guide portion 14 from the first section 631 to the second section 632. In particular, the second section 632 starts from the connection point with the first section 631, and its extension direction is toward the inner side of the base plate 6; likewise, the fourth section 212 starts at the connection point with the third section 211 and extends in a direction toward the inside of the driving disk 2. This prevents the clamp portion 7 from being jammed when the drive disk 2 rotates.

Further, the second segment 632 is located on one of the clockwise and counterclockwise sides of the first segment 631, and the fourth segment 212 is located on the other of the clockwise and counterclockwise sides of the third segment 211. Those skilled in the art can select the extending directions of the second limiting groove 63 and the third limiting groove 21 according to the actual requirement to adapt to the requirement. However, the extending directions of the two components should be opposite to each other.

To sum up, the clamp provided by the utility model comprises a driving disc, a base disc and a plurality of clamping parts; the driving disk is rotatably and coaxially arranged relative to the base disk, and a plurality of clamping parts are circumferentially arranged around the base disk; the base plate is provided with a plurality of first limiting grooves and a plurality of second limiting grooves, and the plurality of first limiting grooves and the plurality of second limiting grooves are distributed around the circumferential direction of the base plate respectively; the clamping part is provided with a first guide part and a second guide part, the first guide part is limited to move in the first limiting groove along the extending direction of the first limiting groove, and the second guide part is limited to move in the second limiting groove along the extending direction of the second limiting groove; the driving disc is provided with a plurality of third limiting grooves which are distributed around the circumferential direction of the driving disc; the first guide part is also limited in the third limiting groove to move along the extending direction of the third limiting groove; when the driving disc rotates, the driving disc drives the first guide part through the third limiting groove, so that the clamping part moves away from or close to the center of the base disc. According to the configuration, the driving disc rotates during use, the plurality of clamping parts can be driven to synchronously move away from or close to the center of the base disc, so that the clamping process of the rod piece is a self-centering clamping process, and the straightness of the rod piece with a larger major diameter can be adjusted. Furthermore, the clamping of the plurality of clamping parts to the rod piece is in surface contact, the positioning mode is high in precision and high in stability, and the defect that the clamping precision of the V-shaped block is low in the prior art is overcome.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. A jig for use in a wire-moving process, comprising: the device comprises a driving disc, a base disc and a plurality of clamping parts;

2. The clamp of claim 1, wherein the first restraint slot is located outside of the second restraint slot.

3. The clamp of claim 2, wherein each of the first position-limiting grooves corresponds to one of the second position-limiting grooves, the corresponding first position-limiting groove and the corresponding second position-limiting groove form a position-limiting groove group, and the extending direction of the first position-limiting groove in the same position-limiting groove group is arranged at an angle with the extending direction of the second position-limiting groove.

4. A clamping apparatus according to claim 3, wherein said first position-limiting groove of one of said position-limiting groove sets extends in a direction past said second position-limiting groove of said adjacent position-limiting groove set.

5. The clamp of claim 1, wherein the extending direction of the first limiting groove and the extending direction of the third limiting groove are arranged at an angle, and the extending direction of the third limiting groove does not pass through the center of the driving disk.

6. The clamp according to claim 1, wherein the second limiting groove comprises a first section and a second section which are communicated with each other, a connecting line of an end point of the first section far away from the center of the base plate and the center of the base plate is a first reference line, the extending direction of the first section and the first reference line form a first included angle, the extending direction of the second section and the first reference line form a second included angle, and the first included angle is smaller than the second included angle; the third limiting groove comprises a third section and a fourth section which are communicated, the end point of the third section, which is far away from the center of the driving disc, is connected with the center of the driving disc to form a second reference line, the extending direction of the third section and the second reference line form a third included angle, the extending direction of the fourth section and the second reference line form a fourth included angle, and the third included angle is smaller than the fourth included angle.

7. The clamp of claim 6, wherein the direction of extension of the first section is at an obtuse angle to the direction of extension of the second section; the extending direction of the third section and the extending direction of the fourth section form an obtuse angle.

8. The clamp of claim 6, wherein the second section is located on one of a clockwise side and a counterclockwise side of the first section, and the fourth section is located on the other of the clockwise side and the counterclockwise side of the third section.

9. The clamp of claim 1, wherein the first guide portion comprises two first bearings coaxially connected, one of the two first bearings sliding in the first retaining groove and the other of the two first bearings sliding in the third retaining groove; the second guide portion includes a second bearing, and an axis of the first bearing and an axis of the second bearing are both parallel to an axis of the base plate.

10. The clamp of claim 1, comprising at least two of the base disks axially spaced apart and at least two of the drive disks axially spaced apart; and each base disc is correspondingly connected with one driving disc.

11. The clamp of claim 1, further comprising a base plate and a connecting member, wherein the base plate is fixedly connected to the base plate, one end of the connecting member is rotatably connected to the driving disk, the other end of the connecting member is movably connected to the base plate, and the connecting member is configured to drive the driving disk to rotate by moving relative to the base plate.

12. The clamp of claim 11, further comprising a first locking nut and a second locking nut, wherein the bottom plate has a through hole, the connecting member is movably disposed through the through hole along the axial direction of the connecting member, the first locking nut and the second locking nut are respectively in threaded connection with the connecting member, and the first locking nut and the second locking nut are respectively located at two sides of the through hole for locking the position of the connecting member relative to the through hole along the axial direction of the connecting member.