CN216326686U - Clamping mechanism and clamping device - Google Patents

Abstract

The utility model relates to a clamping mechanism and a clamping device, wherein the clamping mechanism comprises a fixed base body, the fixed base body is provided with a guide seat and a drive plate, the guide seat is provided with clamping jaws distributed along the circumference, each clamping jaw is assembled on the guide seat along the radial direction of the circumference in a guiding way, the clamping jaws are provided with a shifting column, the drive plate is provided with a shifting groove, the shifting column is arranged in the shifting groove along the extending direction of the shifting groove in a guiding way and can rotate in the shifting groove, the distance between each point in the extending direction of the shifting groove and the circle center of the circumference is gradually changed, one of the guide seat and the drive plate is fixedly assembled on the fixed base body, the other one is rotatably assembled on the fixed base body, when the guide seat and the driving plate rotate relatively, the clamping jaws stretch and move along the radial direction to clamp and release the clamped piece by means of the guide motion of the driving column in the driving groove, and the whole clamping mechanism is simple in structure, convenient to manufacture and low in cost.

Description

Clamping mechanism and clamping device

Technical Field

The utility model relates to a clamping mechanism and a clamping device.

Background

For rod-shaped objects, three-jaw chucks are often used for clamping. The three-jaw chuck comprises a fixed base body, wherein a guide seat and a drive plate are arranged on the fixed base body, three clamping jaws are distributed on the guide seat along the circumference, each clamping jaw is assembled on the guide seat along the radial direction of the circumference where the clamping jaw is located, the drive plate is formed by a plate body with plane threads, and the clamping jaws are provided with driving threads matched with the plane threads on the rotary plate. When the rotary table rotates, the rotary table can drive the three clamping jaws to stretch out and draw back along the radial direction through thread transmission, so that the workpiece is clamped and released, the three-jaw chuck can form large clamping force, workpieces in different shapes such as a circle, a triangle and a regular hexagon can be clamped, and the three-jaw chuck is suitable for clamping and processing the workpieces on a machine tool.

However, the existing three-jaw chuck type clamping mechanism needs to process driving threads and plane threads, and is complex in structure and high in cost. In addition, the conventional three-jaw chuck type clamping mechanism realizes clamping action through a thread transmission structure, and although a good clamping effect can be realized, the clamping and releasing processes require a driving plate to rotate for a large number of turns. In some application occasions without large clamping force on the rod-shaped object, if the existing three-jaw chuck type clamping mechanism is used, the problems of more complex structure and lower clamping and releasing operation efficiency exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a clamping mechanism to solve the problems that the existing clamping mechanism is complex in structure and low in clamping and releasing operation efficiency; the present invention is also directed to a clamping device, which solves the problems of the conventional clamping device, such as complicated structure and low clamping and releasing efficiency.

The technical scheme of the clamping mechanism is as follows:

the clamping mechanism comprises a fixed base body, wherein a guide seat and a drive plate are arranged on the fixed base body, clamping jaws distributed along the circumference are arranged on the guide seat, each clamping jaw is assembled on the guide seat along the radial direction of the circumference, a shifting column is arranged on the clamping jaw, a shifting groove is arranged on the drive plate, the shifting column is arranged in the shifting groove along the extending direction of the shifting groove and can rotate in the shifting groove, the distance between each point in the extending direction of the shifting groove and the circle center of the circumference is gradually changed, one of the guide seat and the drive plate is fixedly assembled on the fixed base body, the other one of the guide seat and the drive plate is rotatably assembled on the fixed base body, and when the guide seat and the drive plate rotate relatively, the clamping jaws move along the radial direction to clamp and release a clamped piece.

Has the advantages that: the shifting groove is arranged on the shifting plate, and the distance between each point in the extending direction of the shifting groove and the circle center of the circumference is gradually changed, so that when the guide seat or the shifting plate is rotated, the shifting groove with the gradually changed distance from the circle center drives the shifting column to move in a guiding way, and further, the radial expansion of the clamping jaw is realized, so as to clamp and release a clamped piece; and, dial post and group groove complex transmission structure, for the plane screw thread transmission structure of current three-jaw chuck, simple structure, processing is convenient, and with low costs to through with the groove that dials of centre of a circle distance gradual change drives and dials the post action, through dialling the radial distance that has between the groove extending direction both ends, the rotation amplitude need not too big can make the clamping jaw realize great flexible volume, can be favorable to improving centre gripping and release operating efficiency.

Further, the shifting groove is an arc-shaped long groove.

Has the advantages that: the clamping jaw can be guided and moved smoothly on the guide seat.

Furthermore, the drive plate is of a cover body structure, and the drive groove is arranged on the plate surface on one side of the cover body structure away from the guide seat; the clamping jaw comprises a clamping seat and a clamping head, the clamping seat is arranged between the disc surface of the cover body structure and the guide seat, and the clamping seat is covered in the cover body structure.

Has the advantages that: the arrangement space in the cover body structure is fully utilized, the structure is compact, and the drive plate of the cover body structure can protect the guide seat and the clamping jaw in the cover body structure.

Furthermore, the driving plate is fixed on the fixed base body, the guide seat is of a disc structure and is rotatably assembled in the cover body structure by means of matching of the outer peripheral surface and the inner wall of the cover body structure; the side wall of the cover body structure or the fixed base body is provided with a notch, and the guide seat is provided with an ear handle extending out of the outside through the notch.

Has the advantages that: the guiding seat of the disc structure is limited by the inner wall of the cover body structure and can rotate in the cover body structure, and a rotating structure is not required to be additionally and independently arranged; and the ear handle extending out of the cover body structure is used for driving, so that the operation is convenient.

Further, the opening side of the cover body structure is fixedly covered with a bottom cover plate, and the bottom cover plate forms the fixed base body; the part of the clamping jaw, which is used for clamping the clamped piece, is provided with a rubber pad, the bottom cover plate is provided with a locking long groove at a position corresponding to the rotation track of the lug, and the lug is provided with a connecting hole so as to press the lug on the bottom cover plate through a fastener after the lug rotates to enable the clamping jaw to clamp the clamped piece.

Has the advantages that: through setting up locking elongated slot and fastener and realizing the centre gripping locking that targets in place, simple structure, convenient operation, and with the rubber pad cooperation, can guarantee that the clamp force is reliable.

Furthermore, a central hole for the clamped piece to pass through is formed in the drive plate, the clamping jaw comprises a clamping seat and a clamping head which is detachably and fixedly connected to the clamping seat, the clamping seat is used for being matched with the guide seat in a guiding mode, and the clamping head is used for clamping the clamped piece; the clamping seat is L-shaped and comprises an axial extension section and a radial extension section, the axial extension section extends axially along the central hole of the driving plate, the radial extension section extends radially, the clamping head is T-shaped and comprises an axial extension section and a radial extension section, the axial extension section extends axially along the central hole of the driving plate, and the radial extension section of the clamping head is fixedly connected to the radial extension section of the clamping seat.

Has the advantages that: the clamping jaws are arranged in a split manner, so that different clamping heads are arranged for different clamped pieces to be replaced and installed, and the universality is improved; the L-shaped clamping seat is fixedly connected with the T-shaped clamping head, so that the arrangement space is saved, and the clamping is stable; and the T-shaped chuck can obtain longer clamping length, so that reliable clamping is ensured.

Furthermore, a guide pillar is arranged on one side, away from the shifting column, of the clamping jaw, a guide groove is formed in the guide seat, and the clamping jaw and the guide seat are movably assembled in a guiding mode through the guide pillar and the guide groove.

Has the advantages that: the guide structure is simple, and is favorable for reducing the size of the clamping mechanism.

Furthermore, the shifting groove is an arc-shaped long groove, and the curvature of at least one arc-shaped long groove is different from the curvature of the rest arc-shaped long grooves; or the shifting groove is a straight long groove, and the inclination angle of at least one straight long groove is different from the inclination angles of the other straight long grooves.

Has the advantages that: the telescopic movement stroke of at least one clamping jaw is different from the telescopic movement strokes of other clamping jaws, so that the edges and the side surfaces can be clamped simultaneously when clamped by clamping pieces with edges in the shapes and the like.

The technical scheme of the clamping device is as follows:

clamping device, including the mount pad and set up fixture on the mount pad, fixture includes fixed base member, is equipped with guide holder and driver plate on the fixed base member, is equipped with the clamping jaw along circumference distribution on the guide holder, and each clamping jaw follows the radial direction of circumference is assembled on the guide holder, is equipped with dials the post on the clamping jaw, is equipped with on the driver plate and dials the groove, dials the post and sets up in dialling the inslot and can be at dialling the inslot internal rotation along the extending direction of dialling the groove, dial each point on the extending direction of groove with distance between the centre of a circle of circumference is gradual change, and one of them fixed assembly of guide holder and driver plate is on fixed base member, and another rotates the assembly on fixed base member to when guide holder and driver plate rotate relatively, rely on the guide motion of dialling the post in dialling the inslot, make each clamping jaw along radial concertina movement in order to press from both sides tightly and release by the holder.

Has the advantages that: the shifting groove is arranged on the shifting plate, and the distance between each point in the extending direction of the shifting groove and the circle center of the circumference is gradually changed, so that when the guide seat or the shifting plate is rotated, the shifting groove with the gradually changed distance from the circle center drives the shifting column to move in a guiding way, and further, the radial expansion of the clamping jaw is realized, so as to clamp and release a clamped piece; and, dial post and group groove complex transmission structure, for the plane screw thread transmission structure of current three-jaw chuck, simple structure, processing is convenient, and with low costs to through with the groove that dials of centre of a circle distance gradual change drives and dials the post action, through dialling the radial distance that has between the groove extending direction both ends, the rotation amplitude need not too big can make the clamping jaw realize great flexible volume, can be favorable to improving centre gripping and release operating efficiency.

Further, the shifting groove is an arc-shaped long groove.

Has the advantages that: the clamping jaw can be guided and moved smoothly on the guide seat.

Furthermore, the drive plate is of a cover body structure, and the drive groove is arranged on the plate surface on one side of the cover body structure away from the guide seat; the clamping jaw comprises a clamping seat and a clamping head, the clamping seat is arranged between the disc surface of the cover body structure and the guide seat, and the clamping seat is covered in the cover body structure.

Has the advantages that: the arrangement space in the cover body structure is fully utilized, the structure is compact, and the drive plate of the cover body structure can protect the guide seat and the clamping jaw in the cover body structure.

Furthermore, the driving plate is fixed on the fixed base body, the guide seat is of a disc structure and is rotatably assembled in the cover body structure by means of matching of the outer peripheral surface and the inner wall of the cover body structure; the side wall of the cover body structure or the fixed base body is provided with a notch, and the guide seat is provided with an ear handle extending out of the outside through the notch.

Has the advantages that: the guiding seat of the disc structure is limited by the inner wall of the cover body structure and can rotate in the cover body structure, and a rotating structure is not required to be additionally and independently arranged; and the ear handle extending out of the cover body structure is used for driving, so that the operation is convenient.

Further, the opening side of the cover body structure is fixedly covered with a bottom cover plate, and the bottom cover plate forms the fixed base body; the part of the clamping jaw, which is used for clamping the clamped piece, is provided with a rubber pad, the bottom cover plate is provided with a locking long groove at a position corresponding to the rotation track of the lug, and the lug is provided with a connecting hole so as to press the lug on the bottom cover plate through a fastener after the lug rotates to enable the clamping jaw to clamp the clamped piece.

Has the advantages that: through setting up locking elongated slot and fastener and realizing the centre gripping locking that targets in place, simple structure, convenient operation, and with the rubber pad cooperation, can guarantee that the clamp force is reliable.

Furthermore, a central hole for the clamped piece to pass through is formed in the drive plate, the clamping jaw comprises a clamping seat and a clamping head which is detachably and fixedly connected to the clamping seat, the clamping seat is used for being matched with the guide seat in a guiding mode, and the clamping head is used for clamping the clamped piece; the clamping seat is L-shaped and comprises an axial extension section and a radial extension section, the axial extension section extends axially along the central hole of the driving plate, the radial extension section extends radially, the clamping head is T-shaped and comprises an axial extension section and a radial extension section, the axial extension section extends axially along the central hole of the driving plate, and the radial extension section of the clamping head is fixedly connected to the radial extension section of the clamping seat.

Has the advantages that: the clamping jaws are arranged in a split manner, so that different clamping heads are arranged for different clamped pieces to be replaced and installed, and the universality is improved; the L-shaped clamping seat is fixedly connected with the T-shaped clamping head, so that the arrangement space is saved, and the clamping is stable; the T-shaped chuck can obtain longer clamping length, and reliable clamping is guaranteed.

Furthermore, a guide pillar is arranged on one side, away from the shifting column, of the clamping jaw, a guide groove is formed in the guide seat, and the clamping jaw and the guide seat are movably assembled in a guiding mode through the guide pillar and the guide groove.

Has the advantages that: the guide structure is simple, and is favorable for reducing the size of the clamping mechanism.

Furthermore, the shifting groove is an arc-shaped long groove, and the curvature of at least one arc-shaped long groove is different from the curvature of the rest arc-shaped long grooves; or the shifting groove is a straight long groove, and the inclination angle of at least one straight long groove is different from the inclination angles of the other straight long grooves.

Has the advantages that: the telescopic movement stroke of at least one clamping jaw is different from the telescopic movement strokes of other clamping jaws, so that the edges and the side surfaces can be clamped simultaneously when clamped by clamping pieces with edges in the shapes and the like.

Furthermore, the clamping mechanisms are at least two, and the distance between every two clamping mechanisms is adjustable.

Has the advantages that: can be suitable for the longer by the holder of length, improve the commonality and the centre gripping is firm reliable.

Drawings

Fig. 1 is a perspective view of a chucking mechanism according to embodiment 1 of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a schematic view of the structure of FIG. 1 with the dial removed;

FIG. 5 is a schematic view of the removal jaw of FIG. 1;

FIG. 6 is a schematic view of the structure of the dial in FIG. 1;

FIG. 7 is a schematic structural view of the guide base of FIG. 1;

FIG. 8 is a schematic view of the jaw of FIG. 1;

FIG. 9 is a schematic view of the structure of the cartridge of FIG. 8;

FIG. 10 is a schematic structural view of a holding mechanism according to embodiment 2 of the present invention;

FIG. 11 is a schematic structural view of a holding mechanism according to embodiment 3 of the present invention;

FIG. 12 is a schematic view of the cartridge of FIG. 11;

FIG. 13 is a schematic view showing a clamping state in the embodiment 16 of the clamping device of the present invention;

FIG. 14 is a schematic view of the structure of the clamping device of FIG. 13;

FIG. 15 is a schematic view of the construction of the retractor of FIG. 13;

fig. 16 is a schematic structural view of the embodiment 17 of the holding device.

In the figure: 1. a clamping mechanism; 11. a dial; 111. a groove is poked; 112. a flange hole; 113. a notch; 114. a central hole of the drive plate; 12. a guide seat; 121. a guide groove; 122. an ear handle; 123. connecting holes; 124. a central hole of the guide seat; 13. a chuck; 131. a rubber pad; 132. a chuck bolt hole; 14. a holder; 141. column shifting; 142. a guide post; 143. a clamp seat bolt hole; 15. fixing the substrate; 151. a cover plate fixing hole; 152. locking the long groove; 153. a central hole of the cover plate; 2. a retractor; 21. a first section of sleeve; 22. a second section of sleeve; 23. a third section of sleeve; 3. a guide rail slider mechanism; 31. a slider; 311. a slider flange hole; 312. a slider bolt hole; 32. a guide rail; 33. a support; 331. and a bracket fixing hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the recitation of "comprising an … …" may occur without the exclusion of additional like elements present in the process, method, article, or apparatus that comprises the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Embodiment 1 of the chucking mechanism of the present invention:

as shown in fig. 1 and 2, the clamping mechanism includes a fixed base 15, a guide seat 12 and a dial 11 are disposed on the fixed base 15, clamping jaws distributed along a circumference are disposed on the guide seat 12, and radial directions of the circumference where each clamping jaw is disposed are assembled on the guide seat 12.

As shown in fig. 3 and 6, the dial 11 is a cover structure and has a cylindrical circumferential sidewall, one side of the dial 11 facing the bottom cover plate is an opening, a flange is disposed at an opening edge of the opening, a flange hole 112 is disposed on the flange and is used for being fixedly connected with the bottom cover plate, so that the dial 11 is fixed on the bottom cover plate, and the bottom cover plate covers the opening side of the cover structure. The dial 11 has a dial center hole 114 therethrough, and the dial center hole 114 penetrates the face of the dial 11 on the side away from the bottom cover plate.

The dial 11 is provided with a dial groove 111, the dial groove 111 is arranged on the dial surface of one side of the dial 11 far away from the bottom cover plate, and the dial surface provided with the dial groove 111 is a disc surface. The shifting grooves 111 are provided with a plurality of clamping jaws in a one-to-one correspondence manner, in the embodiment, six shifting grooves 111 are arranged and distributed circumferentially around the axis of the central hole 114 of the shifting plate, the shifting grooves 111 are arc-shaped long grooves, the curvatures of the arc-shaped long grooves are the same, and the shifting grooves can be suitable for clamped pieces with cross sections in centrosymmetric shapes. The distance between each point in the extending direction of the shifting groove 111 and the axis of the central hole 114 of the driving plate is gradually changed, the distance between each point in the extending direction of the shifting groove 111 and the axis of the central hole 114 of the driving plate is different, the shifting groove 111 extends linearly and smoothly, and the distance between each point in the extending direction of the shifting groove 111 and the center of the circle where each clamping jaw is located is gradually changed.

As shown in fig. 3, 5 and 7, the guide seat 12 is a disk structure and is located in a cavity of the cover body structure of the dial 11, a circumferential side wall of the guide seat 12 abuts against a circumferential side wall of the dial 11, and the guide seat 12 is rotatably assembled in the cover body structure of the dial 11 by means of matching of an outer circumferential surface and an inner wall of the cover body structure of the dial 11. The dial 11 is provided with a notch 113, and a part of the notch 113 is located on the circumferential side wall of the dial 11, and a part of the notch 113 is located on the flange fold at the bottom of the dial 11. The guide holder 12 is provided with an ear handle 122, the ear handle 122 extends along the radial direction of the guide holder 12 and is integrally arranged with the main body of the guide holder 12, and the ear handle 122 can extend out of the dial 11 through a notch 113 and protrude out of the bottom cover plate, so that the dial can be conveniently stirred by a hand.

The ear handle 122 is provided with a connecting hole 123, the bottom cover plate is provided with a locking long groove 152 at a position corresponding to the notch 113, the locking long groove 152 is an arc-shaped long groove, and the extending direction corresponds to the rotating track of the ear handle 122, so that after the ear handle 122 is pushed to the right position, the ear handle 122 is pressed on the bottom cover plate to lock the guide seat 12.

The guide seat 12 is provided with a guide seat central hole 124 which penetrates through the guide seat 12, six guide grooves 121 are arranged on the guide seat 12, the guide grooves 121 correspond to the clamping jaws one by one, each guide groove 121 extends along the radial direction of the disk surface of the guide seat 12, each guide groove 121 is uniformly distributed on the disk surface of the guide seat 12 around the circumference of the guide seat central hole 124, and the guide grooves 121 are used for forming guide fit with the clamping jaws.

As shown in fig. 3, 4, 8 and 9, the number of the clamping jaws is six, the structure of each clamping jaw is the same, the clamping jaws comprise clamping seats 14 and clamping heads 13, the clamping seats 14 are arranged between the dial face of the dial plate 11 and the guide seat 12 and limited by the dial plate 11 and the guide seat 12, the clamping seats 14 are assembled on the guide seat 12 in a guiding mode, and the clamping heads 13 are used for clamping clamped pieces. The holder 14 is L-shaped, and includes an axial extension section extending axially along the dial plate center hole 114 and a radial extension section extending radially, the radial extension section of the holder 14 extends toward the axis of the dial plate center hole 114 and is close to the guide holder 12, the radial extension section of the holder 14 is in a fan-shaped block structure, the axial extension section of the holder 14 is in an arc-shaped block structure, a side face of the radial extension section of the holder 14, which is far away from the guide holder 12, is provided with two holder bolt holes 143, and the two holder bolt holes 143 are used for fixedly connecting the chuck 13.

Removable fixed connection of chuck 13 is on holder 14, chuck 13 includes two mated L shape clamping portions that the components of a whole that can function independently set up, two L shape clamping portions all have axial extension section and radial extension section, the axial extension section back of two L shape clamping portions sets up, radial extension section pastes and leans on together, all be equipped with chuck bolt hole 132 on two L shape clamping portions, chuck bolt hole 132 is equipped with two with holder bolt hole 143 correspondingly to fix two L shape clamping portions together to holder 14 through the bolt.

The two L-shaped clamping portions fixed together make the overall clamp 13T-shaped, the axial extension sections of the two L-shaped clamping portions together form the axial extension section of the T-shaped clamp 13, and the radial extension sections of the two L-shaped clamping portions together form the radial extension section of the T-shaped clamp 13. The bottom cover plate is provided with a cover plate central hole 153, and two ends of the axial extension section of the chuck 13 respectively extend out of the drive plate central hole 114 and the cover plate central hole 153 towards two sides so as to increase the contact surface with a clamped piece. The axial extension section of the chuck 13 is provided with a rubber pad 131 at the part for clamping the clamped piece, and the clamping surface of the clamping jaw is a plane.

A guide post 142 is arranged on one side surface of the clamping seat 14 close to the guide seat 12, the guide post 142 is of a square sliding block 31 structure, the guide post 142 is guided and moved in the guide groove 121 on the guide seat 12, and the clamping jaw and the guide seat 12 are movably assembled through the guide post 142 and the guide groove 121.

A shifting column 141 is arranged on one end face of the axial extension section on the holder 14, which is far away from the guide holder 12, the shifting column 141 is a cylinder integrally arranged on the holder, the shifting column 141 is arranged in a shifting groove 111 on the dial plate 11 in a guiding manner, and the shifting column 141 is movable along the extension direction of the shifting groove 111 and can rotate in the shifting groove 111.

The bottom cover plate is provided with a plurality of cover plate fixing holes 151, and the cover plate fixing holes 151 are distributed along the axial direction of the bottom cover plate to fixedly connect the flanges of the guide seat 12.

During assembly, the clamping head 13 and the clamping seat 14 are fixed through a bolt, then the guide post 142 is inserted into the guide groove 121 of the guide seat 12, each clamping jaw is moved to a position with the smallest clamping caliber, then the dial plate 11 is placed, the shifting columns 141 on each clamping jaw are respectively inserted into the shifting grooves 111 on the dial plate 11, the ear handles 122 extend out of the notches 113 on the dial plate 11, then the bottom cover plate is placed at the bottom of the dial plate 11 and the guide seat 12, the central axis of the bottom cover plate is overlapped with the central axis of the dial plate 11, the locking long groove 152 on the bottom cover plate is positioned at the center of the corresponding position of the notch 113 on the dial plate 11, and the bottom cover plate is connected with the guide seat 12 through the bolt.

When the clamping device is used, the lug 122 is pulled to enable the guide seat 12 to rotate anticlockwise, the clamping caliber is enlarged, the clamped piece penetrates through the clamping mechanism, the lug 122 is pulled to enable the guide seat 12 to rotate clockwise, the clamping caliber is reduced, the clamping jaw clamps the clamped piece, and meanwhile, after the clamping is in place, the lug 122 is locked on the bottom cover plate through the bolt. In addition, the bolt for locking the lug 122 can also be pre-assembled in the connecting hole 123 and the locking long groove 152 on the lug 122 in advance, and before the clamping operation, the bolt is unscrewed and then the lug 122 is pulled.

Through set up on the driver plate 11 and dial groove 111 to make the distance between the extension direction on the groove 111 and the centre of a circle of dialling gradually, thereby make and dial post 141 can realize the flexible of clamping jaw through the guiding motion in dialling groove 111, whole fixture simple structure, convenient preparation, it is with low costs, be favorable to improving clamping efficiency moreover.

Example 2 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the clamping surface of the chuck of the clamping jaw in embodiment 1 is a flat surface, but in this embodiment, as shown in fig. 10, the clamping surface of the chuck 13 of the clamping jaw is an arc surface, and after each clamping jaw clamps the clamped piece, the clamping surface of each clamping jaw is surrounded into a circular shape to adapt to the clamping of the cylindrical rod piece.

Example 3 of the chucking mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the clamping surfaces of the clamping jaws in embodiment 1 are flat surfaces, and the structures of the clamping jaws are the same, but in this embodiment, as shown in fig. 11 and 12, the clamping mechanism is used for clamping a square rod, the structures of the clamping jaws are different, the clamping mechanism includes an edge clamping jaw for clamping an edge portion of a clamped piece and a side clamping jaw for clamping a side surface of the clamped piece, the clamping surface of the chuck of the side clamping jaw is a flat surface, and the clamping surface of the chuck of the edge clamping jaw is an L-shaped surface.

Example 4 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the guide seat in embodiment 1 is rotatably mounted on the fixing base, and the drive plate is fixedly mounted on the fixing base, while in this embodiment, the guide seat is fixedly mounted on the fixing base, and the drive plate is rotatably mounted on the fixing base, and the fixing base includes a seat body and a cover body, the seat body and the cover body enclose a ring groove for mounting a flange of the drive plate, and the drive plate flange is rotatably disposed in the ring groove, and at this time, the guide seat may not be provided with an ear handle.

Example 5 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the dial in embodiment 1 is a cover body structure, and the clamping jaws and the guide seats are disposed in the cover body structure, whereas in this embodiment, the dial is a planar disk body, the fixing base body has a cylindrical body structure, and the clamping jaws and the guide seats are both mounted in the cylindrical body structure of the fixing base body.

Example 6 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the guide seat in embodiment 1 is a disk structure, and is rotatably assembled in the cover body structure by means of the cooperation between the outer peripheral surface and the inner wall of the cover body structure, and in this embodiment, the hole edge of the center hole of the guide seat is provided with an annular flange, and the annular flange is clamped in the center hole of the cover plate and attached to the inner wall, so as to rotatably assemble the guide seat on the fixed base body.

Example 7 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the bottom cover plate in embodiment 1 is provided with a locking elongated slot to be fixedly connected with the connecting hole on the ear handle to realize locking of the guide seat, and in this embodiment, the fixing base body is provided with a tension spring, the tension spring is connected with the ear handle and provides continuous tension for the ear handle to keep the position of the guide seat, and when the clamped piece is released, the ear handle is pulled to overcome the tension of the tension spring to retract the clamping jaws, so as to expand the clamping caliber.

Example 8 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the clip in embodiment 1 is T-shaped and includes two L-shaped clamping portions in pair, but in this embodiment, the clip is an L-shaped structure formed integrally, and in other embodiments, the clip may also be a T-shaped structure formed integrally.

Example 9 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the holder in embodiment 1 is L-shaped, and the collet is T-shaped, but in this embodiment, the holder is a sector, the collet is linear, the collet is provided with a counter bore, and a side wall of the holder facing the center hole of the guide seat is provided with a mating hole, so that the collet is fixed on a side wall of the sector near the center hole of the guide seat by a bolt.

Example 10 of the chucking mechanism in the present invention:

the difference between this embodiment and embodiment 1 lies in that, the clamping jaw in embodiment 1 is provided with a guide pillar, the guide seat is provided with a guide groove, and the guide pillar and the guide groove form a guiding fit.

Example 11 of the chucking mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the shift groove in embodiment 1 is an arc-shaped long groove, while in this embodiment, the shift groove is a straight long groove.

Example 12 of the chucking mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the shift groove in embodiment 1 is an arc-shaped long groove, and the curvature of each arc-shaped long groove is the same, while in this embodiment, the shift groove is an arc-shaped long groove, and the curvature of at least one of each arc-shaped long groove is different from that of the remaining arc-shaped long grooves, and in other embodiments, the shift groove is a straight long groove, and the inclination angle of at least one of each straight long groove is different from that of the remaining straight long grooves, so that the movement strokes of the clamping jaws are different, and the clamping jaws can adapt to the situation that the distance between the clamped surface of the clamped piece and the central axis is different.

Example 13 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the shifting post in embodiment 1 is a cylinder integrally disposed on the holder, and in this embodiment, the shifting post is provided with a sleeve to smoothly rotate in the shifting groove.

Example 14 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the notch is disposed on the dial in embodiment 1, and in this embodiment, the notch is disposed on the fixing base, the lug extends axially along the guide seat and protrudes from the notch on the fixing base, and an arc-shaped locking boss is disposed on a side of the fixing base facing away from the guide seat, and the locking boss corresponds to the notch in position for pressing the lug on the fixing base through a bolt.

Example 15 of the clamping mechanism in the present invention:

the difference between this embodiment and embodiment 1 is that the fixing base in embodiment 1 has a through center hole, and one end of the collet near the fixing base extends out of the center hole of the fixing base, whereas in this embodiment, the fixing base is of a closed structure, and one end of the collet near the fixing base is located inside the dial cover structure.

Examples 1-15 of the clamping device in the present invention:

the clamping device comprises an installation seat and a clamping mechanism arranged on the installation seat, and the clamping mechanism has the same structure as that of the clamping mechanism described in any embodiment 1-15 of the clamping mechanism, and the description is omitted here.

Example 16 of the clamping device in the present invention:

the difference between this embodiment and embodiment 1 of the clamping device is that, in this embodiment, as shown in fig. 13, 14 and 15, there are two clamping mechanisms 1, there is a telescopic device 2 between two clamping mechanisms, the telescopic device 2 is formed by a plurality of sleeves that are sleeved together, the telescopic device 2 has five sleeves, including two first sleeves 21 on the left and right, two second sleeves 22 on the left and right, and a third sleeve between the two second sleeves 22, the first sleeve is sleeved outside the second sleeve 22, the second sleeve 22 is sleeved outside the third sleeve 23, and the two sleeves that are sleeved together are matched through internal and external threads to achieve telescopic operation through screwing. In other embodiments, jack 2 may have other numbers of sleeves.

The first sleeve 21 is provided with a flange, the flange is provided with a first sleeve flange hole 112 for being fixedly connected with the drive plate 11 of the clamping mechanism 1, the flange of the first sleeve 21 forms a fixed base 15, the flange of the first sleeve 21 is provided with an arc-shaped groove for forming a locking long groove 152 of the clamping mechanism, and the expansion piece 2 is used for forming a mounting seat of the clamping mechanism 1.

The distance between the two clamping mechanisms 1 is adjustable through the telescopic device 2, so that the rod-shaped parts with long lengths can be clamped.

Example 17 of the clamping device in the present invention:

the present embodiment is different from embodiment 1 of the clamping device in that, in this embodiment, as shown in fig. 16, two clamping mechanisms realize the distance adjustment by the rail-slider mechanism 3, and the clamping mechanisms are connected with the connecting holes 123 on the fixed base 15 and the slider flange holes 311 on the slider 31 through the flange holes 112 on the dial 11. The slider 31 slides on the guide rail 32, and after sliding to a proper position, the slider 31 passes through the slider bolt hole 312 on the slider 31, and is pressed against the guide rail 32 by the bolt, so as to fix the position of the slider 31. The guide rail 32 is fixedly installed on the bracket 33, and a bracket fixing hole 331 is provided below the bracket 33 for fixing the bracket 33 to the work table.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments without inventive effort, or some technical features of the present invention may be substituted with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A clamping mechanism (1) comprises a fixed base body (15), wherein a guide seat (12) and a dial plate (11) are arranged on the fixed base body (15), clamping jaws distributed along the circumference are arranged on the guide seat (12), and each clamping jaw is assembled on the guide seat (12) along the radial direction of the circumference in a guiding manner, and is characterized in that a shifting column (141) is arranged on each clamping jaw, a shifting groove (111) is arranged on the dial plate (11), each shifting column (141) is arranged in the shifting groove (111) in a guiding manner along the extending direction of the shifting groove (111) and can rotate in the shifting groove (111), the distance between each point in the extending direction of the shifting groove (111) and the circle center of the circumference is gradually changed, one of the guide seat (12) and the dial plate (11) is fixedly assembled on the fixed base body (15), the other one of the guide seat (12) and the dial plate (11) is rotatably assembled on the fixed base body (15), so that when the guide seat (12) and the dial plate (11) relatively rotate, the shifting column (141) moves in the shifting groove (111), so that the clamping jaws can move in a radial telescopic way to clamp and release the clamped piece.

2. The fixture (1) according to claim 1, wherein the finger slot (111) is an arc-shaped elongated slot.

3. The clamping mechanism (1) according to claim 1 or 2, characterized in that the drive plate (11) is of a cover structure, and the drive groove (111) is arranged on the plate surface of the cover structure at the side far away from the guide seat (12); the clamping jaw comprises a clamping seat (14) and a clamping head (13), the clamping seat (14) is arranged between the disc surface of the cover body structure and the guide seat (12), and the clamping seat is covered in the cover body structure.

4. The clamping mechanism (1) according to claim 3, characterized in that the driving plate (11) is fixed on the fixed base body (15), the guide seat (12) is in a disc structure and is rotatably assembled in the cover body structure by means of the matching of the outer peripheral surface and the inner wall of the cover body structure; a gap (113) is arranged on the side wall of the cover body structure or on the fixed base body (15), and an ear handle (122) extending out of the guide seat (12) through the gap (113) is arranged on the guide seat.

5. The fixture (1) according to claim 4, wherein the open side of the cover structure is fixedly closed by a bottom cover plate, which forms said fixed base (15); the part of the clamping jaw, which is used for clamping the clamped piece, is provided with a rubber pad (131), the bottom cover plate is provided with a locking long groove (152) at a position corresponding to the rotation track of the lug (122), and the lug (122) is provided with a connecting hole (123) so that the lug (122) is pressed on the bottom cover plate through a fastener after the lug (122) rotates to enable the clamping jaw to clamp the clamped piece.

6. The clamping mechanism (1) according to claim 1 or 2, wherein the drive plate (11) is provided with a central hole for the clamped piece to pass through; the clamping jaw comprises a clamping seat (14) and a clamping head (13) detachably and fixedly connected to the clamping seat (14), the clamping seat (14) is used for being matched with the guide seat (12) in a guiding mode, and the clamping head (13) is used for clamping a clamped piece; the clamping seat (14) is L-shaped and comprises an axial extension section and a radial extension section, the axial extension section extends axially along the central hole of the drive plate (11), the radial extension section extends radially, the clamping head (13) is T-shaped and comprises an axial extension section and a radial extension section, the axial extension section extends axially along the central hole of the drive plate (11), and the radial extension section of the clamping head (13) is fixedly connected to the radial extension section of the clamping seat (14).

7. The clamping mechanism (1) according to claim 1 or 2, characterized in that a guide post (142) is arranged on the side of the clamping jaw away from the shifting post (141), a guide groove (121) is arranged on the guide base (12), and the clamping jaw and the guide base (12) are movably assembled in a guiding way through the guide post (142) and the guide groove (121).

8. The fixture (1) according to claim 1, wherein the finger slot (111) is an arc-shaped slot, at least one arc-shaped slot having a curvature different from the curvature of the remaining arc-shaped slots; or the shifting groove (111) is a straight long groove, and the inclination angle of at least one straight long groove is different from that of the other straight long grooves.

9. A clamping device comprising a mounting base and a clamping mechanism (1) arranged on the mounting base, characterized in that the clamping mechanism (1) is a clamping mechanism (1) according to any one of the preceding claims 1-8.

10. A holding device as claimed in claim 9, characterized in that at least two holding devices (1) are provided, the distance between the holding devices (1) being adjustable.

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