CN219170647U - Clamping mechanism - Google Patents

Abstract

The utility model provides a clamping mechanism, comprising: the bearing assembly comprises a bottom plate and a support piece vertically arranged on the bottom plate; the positioning piece is connected to the supporting piece and used for bearing the workpiece, and is provided with a plurality of positioning grooves which are arranged at intervals along the peripheral side of the positioning piece, and each positioning groove penetrates through the positioning piece; the movable piece is connected with the supporting piece in a sliding way and is positioned between the positioning piece and the bottom plate; the clamping assemblies are arranged at intervals along the peripheral side of the movable piece and correspond to the positioning grooves, each clamping assembly comprises a clamping piece and a connecting rod, one end of the clamping piece and the movable piece are rotationally connected with the connecting rod, the middle part of the clamping piece is rotationally connected with the positioning piece, and the other end of the clamping piece movably passes through the positioning groove; the driving piece is arranged between the bottom plate and the movable piece and is connected with the movable piece and used for driving the movable piece to be close to or far away from the positioning piece so that the inner side or the outer side of the workpiece is respectively clamped by the multiple groups of clamping assemblies. Therefore, the clamping mechanism has the clamping function on the outer side and the inner side of the workpiece, and the application range is improved.

Description

Clamping mechanism

Technical Field

The utility model relates to the technical field of fixing devices, in particular to a clamping mechanism.

Background

When a workpiece is machined, a fixing mechanism is generally adopted to fix the workpiece so as to prevent the workpiece from shaking in the machining process, and the fixing mode is to clamp the outer side of the workpiece through a clamping mechanism so as to machine the inner side of the workpiece or clamp the inner side of the workpiece through the clamping mechanism so as to machine the outer side of the workpiece. However, most of the existing clamping mechanisms only have the function of clamping the outer side or the inner side of the workpiece, the application range is single, and the fixing requirements of different products cannot be met at the same time.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a clamping mechanism to improve the application range.

An embodiment of the present utility model provides a clamping mechanism, including:

the bearing assembly comprises a bottom plate and a supporting piece vertically arranged on the bottom plate;

the positioning piece is connected to one end, far away from the bottom plate, of the supporting piece and is used for bearing a workpiece, a plurality of positioning grooves are formed in the positioning piece at intervals along the periphery of the positioning piece, and each positioning groove penetrates through the positioning piece along a first direction;

the movable piece is connected with the support piece in a sliding manner along the first direction and is positioned between the positioning piece and the bottom plate;

the clamping assemblies are arranged at intervals along the periphery of the movable piece and correspond to the positioning grooves in the first direction, each clamping assembly comprises a clamping piece and a connecting rod, one end of each connecting rod is rotationally connected with the movable piece, the other end of each connecting rod is rotationally connected with one end of each clamping piece, the middle part of each clamping piece is rotationally connected with the corresponding positioning piece, and the other end of each clamping piece penetrates through the corresponding positioning groove in the first direction and is movably arranged in the positioning groove in a second direction or a third direction perpendicular to the first direction;

the driving piece is arranged between the bottom plate and the movable piece and is connected with the movable piece, and is used for driving the movable piece to approach or separate from the positioning piece along the first direction, so that the clamping assemblies are mutually separated or mutually approached to clamp the inner side or the outer side of the workpiece.

In the clamping mechanism, when the driving piece drives the movable piece to move towards the positioning piece along the first direction, the movable piece drives the connecting rod to rotate towards the inner side of the area surrounded by the plurality of groups of clamping components, and the connecting rod pushes the corresponding clamping piece to move along the second direction or the third direction, so that the plurality of clamping pieces are mutually far away until the inner side of the workpiece is abutted, and the inner side of the workpiece is clamped; when the driving piece drives the movable piece to move away from the positioning piece along the first direction, the movable piece drives the connecting rod to rotate towards the outer side of the area surrounded by the plurality of groups of clamping assemblies, and the connecting rod pushes the corresponding clamping piece to move along the second direction or the third direction, so that the plurality of clamping pieces are close to each other and until the clamping piece abuts against the outer side of the workpiece, and the clamping on the outer side of the workpiece is realized.

Therefore, the clamping mechanism drives the movable piece to approach or separate from the positioning piece along the first direction through the driving piece, so that the multiple groups of clamping assemblies positioned on the movable piece are mutually separated or approach to each other, the inner side or the outer side of the workpiece is clamped respectively, the clamping mechanism simultaneously has the clamping function on the outer side and the inner side of the workpiece, and the application range of the clamping mechanism is improved.

In some embodiments, the clamping mechanism further comprises:

and the first limiting piece is connected with one side of the positioning piece, which faces the movable piece, and is used for stopping the movable piece from moving towards the positioning piece.

In some embodiments, the clamping mechanism further comprises:

the second limiting piece is arranged on one side of the driving piece, facing the movable piece, and is used for stopping the movable piece from moving towards the bottom plate.

In some embodiments, the clamp comprises:

the clamping body is rotatably connected with the connecting rod at one end, and the other end of the clamping body penetrates through the positioning groove along the first direction and is movably arranged in the positioning groove;

the rotating shaft penetrates through the clamping body and the positioning piece and is in rotating connection with at least one of the clamping body and the positioning piece.

In some embodiments, the clamping body comprises:

the rotating part is rotationally connected with one end of the connecting rod;

the clamping part is obliquely arranged relative to the rotating part, an included angle formed between the clamping part and the rotating part is an acute angle, and the clamping part penetrates through the positioning groove along the first direction and is movably arranged in the positioning groove; wherein,,

the rotating shaft penetrates through the positioning piece and the clamping part and is in rotating connection with at least one of the clamping part and the positioning piece.

In some embodiments, the rotating portion includes:

the pair of rotating blocks are connected with the clamping part and are arranged at intervals, and one end of the connecting rod is positioned between the pair of rotating blocks;

the pin shaft penetrates through one end of the connecting rod and the pair of rotating blocks and is connected with the connecting rod in a rotating mode.

In some embodiments, the clamping portion has a first clamping surface and a second clamping surface, the first clamping surface and the second clamping surface are disposed on opposite sides of the clamping portion along a movement direction of the clamping portion, and a distance between the first clamping surface and the second clamping surface decreases in sequence along a direction away from the rotating portion.

In some embodiments, the positioning member comprises:

the body is provided with a plurality of grooves,

the positioning bodies are connected with one side of the body, facing the movable piece, and are arranged at intervals along the circumferential direction of the body, and each positioning body is rotationally connected with the corresponding clamping piece;

wherein,,

each positioning groove penetrates through the body and the corresponding positioning body along the first direction.

In some embodiments, the support comprises:

the support rods are arranged at intervals along the periphery of the bottom plate, and two ends of each support rod are respectively connected with the bottom plate and the positioning piece; wherein,,

the movable piece is in sliding connection with the support rods along the first direction.

In some embodiments, each of the support bars comprises:

the rod body is in sliding connection with the movable piece along the first direction, and one end of the rod body is vertically connected with the bottom plate;

the locking body comprises a locking part and a pressing part, wherein one end of the locking part is arranged on the locating piece in a penetrating mode and is in threaded connection with the other end of the rod body in a penetrating mode, and the pressing part is connected with the other end of the locking part and is used for propping against one side, deviating from the movable piece, of the locating piece.

Drawings

Fig. 1 is a schematic structural diagram of a clamping mechanism according to an embodiment of the utility model.

Fig. 2 is an exploded view of the clamping mechanism of fig. 1.

Fig. 3 is a schematic structural view of the clamping assembly in fig. 2.

Fig. 4 is a schematic structural view of the positioning member in fig. 2.

Fig. 5 is a schematic structural view of the movable member in fig. 2.

Description of the main reference signs

Clamping mechanism 10

Bearing assembly 11

Bottom plate 111

Support 112

Support bar 1121

Rod 1121a

Locking body 1121b

Locking portion 1121c

Pressing portion 1121d

Positioning piece 12

Positioning groove 12a

Body 121

Positioning body 122

Movable part 13

Movable plate 131

Movable groove 131a

Linear bearing 132

Screw rod 133

Clamping assembly 14

Clamping member 141

Clamping body 1411

Rotation portion 1411a

Clamping portion 1411b

Rotating block 1411c

Pin 1411d

First clamping surface 1411e

Second clamping surface 1411f

Rotating shaft 1412

Connecting rod 142

Drive member 15

First limiting member 16

First stopper 161

Bolt 162

First bump 163

Second limiting member 17

Second limiting block 171

Second bump 172

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present utility model provides a clamping mechanism 10, which includes a carrying component 11, a positioning component 12, a moving component 13, a plurality of groups of clamping components 14 and a driving component 15, and is used for clamping the inner side or the outer side of a workpiece to fix the workpiece, and the workpiece may be a hollow-out structure component such as a middle frame of a mobile phone.

For convenience of description, a three-dimensional coordinate system is added to fig. 1 and fig. 2, specifically, the multiple groups of clamping assemblies 14 are arranged at intervals along the peripheral side of the movable member 13, so that when the multiple groups of clamping assemblies 14 approach or separate from each other, the clamping member 141 in the X-axis direction moves in the positioning slot 12a in the X-axis direction, and the clamping member 141 in the Y-axis direction moves in the positioning slot 12a in the Y-axis direction, where, for simplicity of description, the direction in which the Z-axis is defined as a first direction, that is, the moving direction of the movable member 13, and the directions in which the X-axis and the Y-axis are defined as a second direction and a third direction, that is, the moving direction of the clamping member 141 in the corresponding positioning slot 12a, respectively. Wherein, X axis, Y axis and Z axis are two by two perpendicular.

Referring to fig. 1 and 2, in some embodiments, the carrier assembly 11 includes a bottom plate 111 and a support 112 vertically disposed on the bottom plate 111. The positioning piece 12 is connected to one end of the supporting piece 112, which is far away from the bottom plate 111, and is used for bearing a workpiece, the positioning piece 12 is provided with a plurality of positioning grooves 12a which are arranged at intervals along the circumferential side of the positioning piece 12, and each positioning groove 12a penetrates through the positioning piece 12 along the first direction; the movable member 13 is slidably connected to the supporting member 112, and the movable member 13 is located between the positioning member 12 and the bottom plate 111, and the movable member 13 is capable of moving in a first direction relative to the supporting member 112; the multiple groups of clamping assemblies 14 are arranged at intervals along the peripheral side of the movable piece 13 and correspond to the multiple positioning grooves 12a in the first direction, each group of clamping assemblies 14 comprises a clamping piece 141 and a connecting rod 142, one end of the connecting rod 142 is rotationally connected with the movable piece 13, the other end of the connecting rod 142 is rotationally connected with one end of the clamping piece 141, the middle part of the clamping piece 141 is rotationally connected with the positioning piece 12, the other end of the clamping piece 141 passes through the positioning groove 12a in the first direction and is movably arranged in the positioning groove 12a in the second direction or the third direction; the driving member 15 is disposed between the base 111 and the movable member 13 and is connected to the movable member 13, for driving the movable member 13 to move toward or away from the positioning member 12 along the first direction, so that the plurality of groups of clamping assemblies 14 are away from or toward each other to clamp the inner side or the outer side of the workpiece.

In the above-mentioned clamping mechanism 10, when the driving member 15 drives the movable member 13 to move toward the positioning member 12 along the first direction, the movable member 13 drives the connecting rod 142 to rotate toward the inner side of the area surrounded by the plurality of groups of clamping assemblies 14, and the connecting rod 142 pushes the corresponding clamping member 141 to move along the second direction or the third direction, so that the plurality of clamping members 141 are far away from each other until the inner side of the workpiece is abutted, and the inner side of the workpiece is clamped; when the driving member 15 drives the movable member 13 to move away from the positioning member 12 along the first direction, the movable member 13 drives the connecting rod 142 to rotate towards the outer side of the area surrounded by the plurality of groups of clamping assemblies 14, and the connecting rod 142 pushes the corresponding clamping member 141 to move along the second direction or the third direction, so that the plurality of clamping members 141 approach each other until the outer side of the workpiece is abutted, and clamping on the outer side of the workpiece is achieved.

Therefore, the clamping mechanism 10 drives the movable member 13 to move closer to or away from the positioning member 12 along the first direction through the driving member 15, so that the groups of clamping assemblies 14 on the movable member 13 move away from or move closer to each other, so as to respectively clamp the inner side or the outer side of the workpiece, so that the clamping mechanism 10 has the clamping functions of both the outer side and the inner side of the workpiece, and the application range of the clamping mechanism 10 is improved.

Referring to fig. 2, in some embodiments, the clamping mechanism 10 further includes a first stop 16. The first limiting piece 16 is connected with one side of the positioning piece 12, facing the movable piece 13, and is used for stopping the movable piece 13 from moving towards the positioning piece 12, limiting the moving distance of the movable piece 13, which is close to the positioning piece 12, so that when the plurality of clamping pieces 141 are limited to be far away from each other, the damage of the clamping pieces 141 caused by hard contact between the clamping pieces 141 and the side walls of the corresponding positioning grooves 12a is avoided, and the service life of the clamping pieces 141 is prolonged.

Specifically, the first limiting member 16 includes a first limiting block 161, a bolt 162 and a plurality of first protruding blocks 163, where the first limiting block 161 and one side of the positioning member 12 facing the movable member 13 are fixedly connected by the bolt 162, and the plurality of first protruding blocks 163 are all protruding on the surface of the first limiting block 161 facing away from the positioning member 12 and are circumferentially spaced along the positioning member 12. The first stopper 161 and the plurality of first bumps 163 are integrally formed.

In this embodiment, the first limiting block 161 and the first protruding block 163 are located in an area surrounded by the plurality of groups of clamping assemblies 14, the plurality of bolts 162 and the plurality of first protruding blocks 163 are all disposed at equal intervals along the circumferential direction of the first limiting block 161.

Referring to fig. 2, in some embodiments, the clamping mechanism 10 further includes a second stop 17. The second limiting member 17 is disposed on a side of the driving member 15 facing the movable member 13, and is used for stopping the movable member 13 from moving toward the bottom plate 111, and limiting a movement distance of the movable member 13 away from the positioning member 12, that is, a distance close to the bottom plate 111, so as to prevent the clamping member 141 from being damaged due to hard contact between the clamping member 141 and a sidewall of a corresponding positioning slot 12a when the clamping members 141 are limited to be close to each other, thereby prolonging a service life of the clamping member 141.

Specifically, the second limiting member 17 includes a second limiting member 171 and a plurality of second protruding blocks 172, the second limiting member 171 is disposed on the driving member 15, and the second protruding blocks 172 are disposed on a surface of the second limiting member 171 facing away from the driving member 15, and are disposed at intervals along a circumferential direction of the second limiting member 171.

In this embodiment, the plurality of second protrusions 172 are disposed at equal intervals along the circumferential direction of the second limiting block 171, and the output end of the driving member 15 passes through the second limiting block 171.

Referring to fig. 2 and fig. 3, in some embodiments, the clamping member 141 includes a clamping body 1411 and a rotating shaft 1412. One end of the clamping body 1411 is rotationally connected with the connecting rod 142, the other end of the clamping body 1411 passes through the positioning groove 12a along a first direction and is used for clamping the inner side or the outer side of a workpiece, the other end of the clamping body 1411 is movably arranged in the positioning groove 12a along a second direction or a third direction and is used for moving along the second direction, so that a plurality of clamping bodies 1411 are mutually close to or far away from each other, and the rotating shaft 1412 passes through the clamping body 1411 and the positioning piece 12 and is rotationally connected with at least one of the clamping body 1411 and the positioning piece 12.

Specifically, the rotating shaft 1412 may be rotatably connected to only the middle portion of the clamping body 1411, may be rotatably connected to only the positioning member 12, or may be rotatably connected to both the middle portion of the clamping body 1411 and the positioning member 12.

In some embodiments, the clamp body 1411 includes a rotating portion 1411a and a clamp portion 1411b. The rotating portion 1411a is rotatably connected to one end of the connecting rod 142, the clamping portion 1411b is disposed obliquely with respect to the rotating portion 1411a, an included angle formed between the clamping portion 1411b and the rotating portion 1411a is an acute angle, the clamping portion 1411b passes through the positioning groove 12a along a first direction and is movably disposed in the positioning groove 12a along a second direction or a third direction, and the rotating shaft 1412 passes through the positioning member 12 and the clamping portion 1411b and is rotatably connected to at least one of the clamping portion 1411b and the positioning member 12. The middle portion of the clamping body 1411 is located above the connection portion of the clamping portion 1411b and the rotating portion 1411 a.

Specifically, the rotating shaft 1412 may be rotatably connected to only the clamping portion 1411b, only the positioning member 12, or both the clamping portion 1411b and the positioning member 12.

In this embodiment, the rotating portion 1411a and the clamping portion 1411b are integrally formed.

In some embodiments, the rotating portion 1411a includes a pair of rotating blocks 1411c and a pin 1411d. The pair of rotating blocks 1411c are connected with the clamping part 1411b and are arranged at intervals, one end of the connecting rod 142 is positioned between the pair of rotating blocks 1411c, and the pin shaft 1411d penetrates through one end of the connecting rod 142 and the pair of rotating blocks 1411c and is connected with the connecting rod 142 in a rotating way, so that the structure is simple and the stability is high.

Referring to fig. 3, in some embodiments, the clamping portion 1411b has a first clamping surface 1411e and a second clamping surface 1411f, the first clamping surface 1411e and the second clamping surface 1411f are disposed on opposite sides of the clamping portion 1411b along a moving direction of the clamping portion 1411b, and a distance between the first clamping surface 1411e and the second clamping surface 1411f decreases in sequence along a direction away from the rotating portion 1411 a. Therefore, the clamping mechanism 10 can expand the size range of clamping the workpiece by providing a larger moving space in the second direction or the third direction for the clamping portion 1411b protruding from the positioning groove 12a on the basis of ensuring that the clamping member 141 has sufficient strength.

In this embodiment, the first clamping surface 1411e is used to abut against the inner side of the workpiece, and the second clamping surface 1411f is used to abut against the outer side of the workpiece.

Referring to fig. 4, in some embodiments, the positioning member 12 includes a body 121 and a plurality of positioning bodies 122. The positioning bodies 122 are connected to one side of the body 121 facing the movable member 13, and the positioning bodies 122 are disposed at intervals along the circumferential direction of the body 121, each positioning body 122 is rotationally connected to the corresponding clamping member 141, and each positioning slot 12a penetrates through the body 121 and the corresponding positioning body 122 along the first direction.

Specifically, two ends of the rotation shaft 1412 are respectively inserted into the positioning bodies 122, and the first limiting block 161 and the first protruding block 163 are both located in an area surrounded by the positioning bodies 122.

In this embodiment, the body 121 and the positioning bodies 122 are integrally formed.

Referring to fig. 2, in some embodiments, the support 112 includes a plurality of support bars 1121. The plurality of support rods 1121 are disposed along the periphery of the bottom plate 111 at intervals, and two ends of each support rod 1121 are respectively connected to the bottom plate 111 and the positioning member 12, and the movable member 13 is slidably connected to the plurality of support rods 1121 along the first direction. As such, the plurality of support rods 1121 provided circumferentially can improve the stability of the sliding of the movable piece 13 in the first direction.

In some embodiments, each support rod 1121 includes a rod body 1121a and a locking body 1121b. The rod body 1121a is slidably connected with the movable member 13 along the first direction, one end of the rod body 1121a is vertically connected with the bottom plate 111, the locking body 1121b comprises a locking portion 1121c and a pressing portion 1121d, one end of the locking portion 1121c is arranged on the positioning body 122 of the positioning member 12 in a penetrating mode and is in threaded connection with the other end of the rod body 1121a, and the pressing portion 1121d is connected with the other end of the locking portion 1121c and is used for propping against one side, away from the movable member 13, of the body 121 of the positioning member 12. Illustratively, the locking body 1121b may be a bolt.

Therefore, the locking body 1121b enables the positioning piece 12 and the supporting rod 1121 to be detachably connected, so that the structure is simple, and the clamping mechanism 10 can be conveniently assembled and disassembled.

Referring to fig. 2 and fig. 5, in some embodiments, the movable member 13 includes a movable plate 131, a plurality of linear bearings 132 and a plurality of screw rods 133, the plurality of linear bearings 132 are circumferentially arranged on the movable plate 131 at intervals, and each support rod 1121 passes through one linear bearing 132, so as to realize sliding connection between the plurality of support rods 1121 and the movable member 13 in the first direction, and the structure is simple and the manufacturing cost is low.

In this embodiment, the movable plate 131 is provided with a plurality of movable slots 131a, and each movable slot 131a penetrates through a side portion of the movable plate 131 along the first direction and corresponds to the group of clamping assemblies 14 along the first direction, and the screw rod 133 penetrates through the movable plate 131 and penetrates through the movable slot 131a. Specifically, a portion of the link 142 in the clamping assembly 14 is located within the movable slot 131a and is rotatably coupled to the corresponding lead screw 133.

The clamping mechanism 10 works in cooperation with an external processing mechanism to process the outside of a workpiece as follows: firstly, placing a workpiece into an area surrounded by a plurality of positioning grooves 12a; then, the driving member 15 drives the movable member 13 to move toward the positioning member 12 along the first direction relative to the supporting member 112, the movable member 13 drives the connecting rod 142 to rotate toward the inner side of the area surrounded by the plurality of groups of clamping assemblies 14, during this process, the connecting rod 142 pushes the corresponding clamping members 141 to move along the second direction or the third direction, so that the plurality of clamping members 141 are far away from each other until the first clamping surface 1411e of the clamping member 141 abuts against the inner side of the workpiece, and finally, an external processing mechanism is used to process the outer side of the workpiece.

The clamping mechanism 10 works together with an external processing mechanism to process the inner side of a workpiece as follows: firstly, placing a workpiece into an area surrounded by a plurality of positioning grooves 12a; then, the driving member 15 drives the movable member 13 to move away from the positioning member 12 along the first direction relative to the supporting member 112, the movable member 13 drives the connecting rod 142 to rotate towards the inner side of the area surrounded by the plurality of groups of clamping assemblies 14, in this process, the connecting rod 142 pushes the corresponding clamping members 141 to move along the second direction or the third direction, so that the plurality of clamping members 141 approach each other until the second clamping surface 1411f of the clamping member 141 abuts against the outer side of the workpiece, and finally, an external processing mechanism is adopted to process the inner side of the workpiece.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.

Claims (10)

1. A clamping mechanism, comprising:

the bearing assembly comprises a bottom plate and a supporting piece vertically arranged on the bottom plate;

the positioning piece is connected to one end, far away from the bottom plate, of the supporting piece and is used for bearing a workpiece, a plurality of positioning grooves are formed in the positioning piece at intervals along the periphery of the positioning piece, and each positioning groove penetrates through the positioning piece along a first direction;

the movable piece is connected with the support piece in a sliding manner along the first direction and is positioned between the positioning piece and the bottom plate;

the clamping assemblies are arranged at intervals along the periphery of the movable piece and correspond to the positioning grooves in the first direction, each clamping assembly comprises a clamping piece and a connecting rod, one end of each connecting rod is rotationally connected with the movable piece, the other end of each connecting rod is rotationally connected with one end of each clamping piece, the middle part of each clamping piece is rotationally connected with the corresponding positioning piece, and the other end of each clamping piece penetrates through the corresponding positioning groove in the first direction and is movably arranged in the positioning groove in a second direction or a third direction perpendicular to the first direction;

the driving piece is arranged between the bottom plate and the movable piece and is connected with the movable piece, and is used for driving the movable piece to approach or separate from the positioning piece along the first direction, so that the clamping assemblies are mutually separated or mutually approached to clamp the inner side or the outer side of the workpiece.

2. The clamping mechanism as recited in claim 1, further comprising:

and the first limiting piece is connected with one side of the positioning piece, which faces the movable piece, and is used for stopping the movable piece from moving towards the positioning piece.

3. The clamping mechanism as recited in claim 1, further comprising:

the second limiting piece is arranged on one side of the driving piece, facing the movable piece, and is used for stopping the movable piece from moving towards the bottom plate.

4. The clamping mechanism of claim 1, wherein the clamping member comprises:

the clamping body is rotatably connected with the connecting rod at one end, and the other end of the clamping body penetrates through the positioning groove along the first direction and is movably arranged in the positioning groove;

the rotating shaft penetrates through the clamping body and the positioning piece and is in rotating connection with at least one of the clamping body and the positioning piece.

5. The clamping mechanism of claim 4, wherein the clamping body comprises:

the rotating part is rotationally connected with one end of the connecting rod;

the clamping part is obliquely arranged relative to the rotating part, an included angle formed between the clamping part and the rotating part is an acute angle, and the clamping part penetrates through the positioning groove along the first direction and is movably arranged in the positioning groove; wherein,,

the rotating shaft penetrates through the positioning piece and the clamping part and is in rotating connection with at least one of the clamping part and the positioning piece.

6. The clamping mechanism of claim 5, wherein the rotating portion comprises:

the pair of rotating blocks are connected with the clamping part and are arranged at intervals, and one end of the connecting rod is positioned between the pair of rotating blocks;

the pin shaft penetrates through one end of the connecting rod and the pair of rotating blocks and is connected with the connecting rod in a rotating mode.

7. The fixture of claim 5, wherein the clamping mechanism comprises a plurality of clamping members,

the clamping part is provided with a first clamping surface and a second clamping surface, the first clamping surface and the second clamping surface are arranged on two opposite sides of the clamping part along the movement direction of the clamping part, and the distance between the first clamping surface and the second clamping surface is sequentially reduced along the direction away from the rotating part.

8. The clamping mechanism of claim 1, wherein the positioning member comprises:

the body is provided with a plurality of grooves,

the positioning bodies are connected with one side of the body, facing the movable piece, and are arranged at intervals along the circumferential direction of the body, and each positioning body is rotationally connected with the corresponding clamping piece; wherein,,

each positioning groove penetrates through the body and the corresponding positioning body along the first direction.

9. The clamping mechanism of claim 1, wherein the support comprises:

the support rods are arranged at intervals along the periphery of the bottom plate, and two ends of each support rod are respectively connected with the bottom plate and the positioning piece; wherein,,

the movable piece is in sliding connection with the support rods along the first direction.

10. The clamping mechanism of claim 9 wherein each of said support bars comprises:

the rod body is in sliding connection with the movable piece along the first direction, and one end of the rod body is vertically connected with the bottom plate;

the locking body comprises a locking part and a pressing part, wherein one end of the locking part is arranged on the locating piece in a penetrating mode and is in threaded connection with the other end of the rod body in a penetrating mode, and the pressing part is connected with the other end of the locking part and is used for propping against one side, deviating from the movable piece, of the locating piece.

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