CN218518607U - Fixing device - Google Patents

Abstract

The utility model provides a fixing device for a plurality of fixed work pieces, including the carrier assembly and compress tightly the subassembly. The bearing assembly is provided with an accommodating groove, a plurality of limiting grooves and a plurality of first fixing grooves, the plurality of limiting grooves are arranged on the bottom wall of the accommodating groove and are arranged along the circumferential interval of the accommodating groove, the pressing assembly is used for being arranged in the accommodating groove and being detachably connected with the bearing assembly, the pressing assembly is provided with a plurality of second fixing grooves, and the plurality of second fixing grooves are arranged along the circumferential interval of the pressing assembly and are in one-to-one correspondence with the plurality of first fixing grooves. When the fixing device is used for fixing workpieces, one ends of the workpieces are sequentially inserted into corresponding limiting grooves, so that the workpieces are quickly positioned, the pressing assembly is placed in the accommodating groove, each second fixing groove in the pressing assembly corresponds to one first fixing groove, each first fixing groove and each corresponding second fixing groove abut against the two opposite sides of each workpiece, the workpieces are fixed, and the workpiece fixing efficiency is improved.

Description

Fixing device

Technical Field

The utility model relates to a mechanical fastening technical field, concretely relates to fixing device.

Background

In machining, a bar-shaped workpiece needs to be cut, the bar-shaped workpiece needs to be fixed before being cut, then the bar-shaped workpiece needs to be cut by matching with a cutting machine table, then the workpiece needs to be polished according to use requirements, and in the cutting operation of the workpiece, the workpiece needs to be fixed by a fixing device. However, the conventional fixing device can only perform single operation once, has high labor intensity and needs to repeat fixing operation frequently, so that the fixing operation efficiency of the workpiece is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a fixing device to improve the fixing efficiency of the workpiece.

An embodiment of the utility model provides a fixing device for fixed a plurality of work pieces, include:

the bearing assembly is provided with an accommodating groove, a plurality of limiting grooves and a plurality of first fixing grooves, the limiting grooves are formed in the bottom wall of the accommodating groove and are arranged at intervals along the circumferential direction of the accommodating groove, the first fixing grooves are formed in the side wall of the accommodating groove, and each first fixing groove is communicated with one limiting groove;

the pressing assembly is arranged in the accommodating groove and detachably connected with the bearing assembly, the pressing assembly is provided with a plurality of second fixing grooves, the second fixing grooves are arranged at intervals along the circumferential direction of the pressing assembly and correspond to the first fixing grooves one by one, and each second fixing groove and the corresponding first fixing groove are used for respectively abutting against two opposite sides of the workpiece.

When the fixing device is used for fixing workpieces, firstly, one ends of the workpieces are inserted into the corresponding limiting grooves in sequence, so that the workpieces are quickly positioned, then the pressing assembly is placed in the accommodating groove, each second fixing groove in the pressing assembly corresponds to one first fixing groove, each first fixing groove and each corresponding second fixing groove abut against the two opposite sides of each workpiece, and the workpieces are quickly fixed. So, can once only realize the location and the fixed of a plurality of work pieces through the carrier assembly who can dismantle the connection with compress tightly the subassembly to the fixed efficiency of work piece has been improved.

In some embodiments, the first fixing groove and the second fixing groove are defined to form a fixing groove, and a projection area of the fixing groove projected to the bottom wall of the accommodating groove along the first direction is smaller than an area of the limiting groove projected to the bottom wall of the accommodating groove along the first direction.

In some embodiments, the carrier assembly comprises:

the bearing piece is provided with the accommodating groove and the limiting groove on one side and is detachably connected with the pressing component;

and the supporting piece is detachably connected to the other side of the bearing piece and used for supporting the bearing piece.

In some embodiments, the bottom wall of the receiving groove is opened with a receiving groove, the fixing device further includes an adsorbing component, and the adsorbing component includes:

the first bulge is convexly arranged on the bottom wall of the accommodating groove and is accommodated in the accommodating groove;

the second bulge is convexly arranged on one side, facing the bearing piece, of the pressing component, at least one of one surface, facing the pressing component, of the first bulge and one surface, facing the bearing piece, of the second bulge is provided with a negative pressure groove, and the pressing component, the bearing piece and the negative pressure groove form a negative pressure cavity;

and the adsorption piece penetrates through the bearing piece and is communicated with the negative pressure cavity.

In some embodiments, an outer chamfer inclined plane is arranged on the outer periphery of the first protrusion, the negative pressure groove is formed in the second protrusion facing one surface of the bearing piece, an inner chamfer inclined plane is arranged on the inner periphery of the second protrusion, and the outer chamfer inclined plane is matched with the inner chamfer inclined plane, so that the outer chamfer inclined plane is attached to the inner chamfer inclined plane.

In some embodiments, a sealing groove is formed in a surface, facing the compression assembly, of the first bulge, and the sealing groove is formed in the outer chamfer inclined surface and is coaxial with the outer chamfer inclined surface;

the adsorption assembly further comprises a sealing element, one part of the sealing element is contained in the sealing groove and abuts against the first bulge, and the other part of the sealing element is exposed out of the sealing groove and used for abutting against the second bulge.

In some embodiments, the support member comprises an upper support plate, a lower support plate and a support pillar, one end of the support pillar is connected with the upper support plate, the other end of the support pillar is connected with the lower support plate, and the bearing member is connected to one side of the upper support plate, which is far away from the support pillar;

the fixing device further comprises a fastening component, the fastening component penetrates through the upper supporting plate and the bearing component, part of the fastening component is contained in the upper supporting plate and between the lower supporting plates, and the bearing component is detachably connected to the upper supporting plate through the fastening component.

In some embodiments, a fastening groove is formed on a bottom wall of the accommodating groove, the fastening groove is spaced apart from the first protrusion, a through hole is formed on the bottom wall of the fastening groove to communicate the inside and the outside of the fastening groove, and the fastening assembly includes:

one end of the rotating piece penetrates through the upper supporting plate and extends into the fastening groove through the through hole;

the fastening piece is connected with one end of the rotating piece and arranged in the fastening groove, the lower end face of the fastening piece and the plane of the bottom wall of the fastening groove are positioned on the same plane, and the length of the fastening piece in the second direction is larger than the width of the through hole in the third direction;

the driving piece is connected the other end of rotating member reaches go up the backup pad, wherein, the driving piece is used for the drive the rotating member drives the fastener is rotatory until the fastener supports the diapire of fastening groove, so that it is fixed in to hold carrier last backup pad.

In some embodiments, the compression assembly comprises:

the second bulge is convexly arranged on one side, facing the bearing piece, of the pressing piece, the first fixing groove is circumferentially arranged along the pressing piece, and the pressing piece is detachably connected with the bearing piece;

the handle is connected to one side of the pressing piece deviating from the negative pressure groove.

In some embodiments, the plurality of limiting grooves and the plurality of first fixing grooves are arranged along the circumferential direction of the accommodating groove at equal intervals, and the second fixing grooves are arranged along the circumferential direction of the pressing component at equal intervals.

Drawings

Fig. 1 is a schematic structural view of a fixing device according to an embodiment of the present invention.

Fig. 2 is an exploded view of the fastening device of fig. 1.

Fig. 3 is a cross-sectional view of the fastening device of fig. 1 taken along line iii-iii.

Fig. 4 is a schematic view of the pressing member and the second protrusion of fig. 2.

Fig. 5 is a schematic structural view of the fastening assembly of fig. 2.

Description of the main elements

Fastening device 10

Bearing assembly 11

Carrier 111

Support 112

Upper supporting plate 1121

Lower support plate 1122

Support column 1123

The storage tank 113

Compression assembly 12

Pressing member 121

Handle 122

Adsorption component 13

First protrusion 131

Adsorption member 132

Seal 133

Second projection 134

Negative pressure tank 135

Outer chamfer angle chamfer 136

Inner chamfered chamfer 137

Seal groove 138

Fastening assembly 14

Fastener 141

Rotating member 142

Driving member 143

Fastening groove 144

Through hole 145

Fixing groove 15

First fixing groove 151

Second fixing groove 152

Limiting groove 16

Receiving groove 17

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2 together, an embodiment of the present invention provides a fixing device 10 for fixing a plurality of workpieces, including a bearing component 11 and a pressing component 12, the bearing component 11 has an accommodating groove 113, a plurality of limiting grooves 16 and a plurality of first fixing grooves 151, the plurality of limiting grooves 16 are disposed on a bottom wall of the accommodating groove 113 and are circumferentially spaced along the accommodating groove 113, the plurality of first fixing grooves 151 are disposed on a side wall of the accommodating groove 113, and each first fixing groove 151 communicates with one limiting groove 16. The pressing component 12 is disposed in the accommodating groove 113 and detachably connected to the bearing component 11, the pressing component 12 is provided with a plurality of second fixing grooves 152, the plurality of second fixing grooves 152 are circumferentially spaced along the pressing component 12 and are in one-to-one correspondence with the plurality of first fixing grooves 151, and each second fixing groove 152 and the corresponding first fixing groove 151 are used for respectively abutting against two opposite sides of the workpiece. In some embodiments, the workpiece may be a cylindrical knife bar. Note that "a plurality" herein means two or more, and when two or more workpieces need to be fixed, the fixing device 10 of the present invention can realize quick positioning and fixing of a plurality of workpieces. When the fixing device 10 fixes workpieces, firstly, one ends of the workpieces are inserted into the corresponding limiting grooves 16 in sequence, so that the workpieces are quickly positioned, then the pressing component 12 is placed in the accommodating groove 113, so that each second fixing groove 152 in the pressing component 12 corresponds to one first fixing groove 151, each first fixing groove 151 and the corresponding second fixing groove 152 abut against the two opposite sides of a single workpiece, and the workpieces are quickly fixed, so that the workpieces can be positioned and fixed at one time through the detachably connected bearing component 11 and the pressing component 12, and the workpiece fixing efficiency is improved.

For convenience of illustration, a three-dimensional coordinate system is added in fig. 1 and 2, wherein the Z-axis is in a first direction, i.e., the height direction of the fastening assembly 14; the direction of the X axis is a second direction; the Y axis is in a third direction.

Referring to fig. 2, in some embodiments, the first fixing groove 151 and the second fixing groove 152 surround to form the fixing groove 15, a projection area of the fixing groove 15 projected to the bottom wall of the receiving groove 113 along the first direction is smaller than an area of the limiting groove 16 projected to the bottom wall of the receiving groove 113 along the first direction, and cross-sectional shapes of the limiting groove 16 and the fixing groove 15 are the same as a cross-sectional shape of the workpiece to be fixed.

In this way, the projection area of the fixing groove 15 projected onto the bottom wall of the receiving groove 113 along the first direction is set to be smaller than the projection area of the limiting groove 16 projected onto the bottom wall of the receiving groove 113 along the first direction, so that one end of the workpiece is not easy to tilt on the basis of being easily inserted into the limiting groove 16, the workpiece can be quickly positioned by the limiting groove 16, and the positioning efficiency of the workpiece is improved.

In this embodiment, the cross-sections of the first fixing groove 151 and the second fixing groove 152 are both semicircular, the cross-section of the limiting groove 16 is circular, the groove diameter of the limiting groove 16 is larger than the diameter of the workpiece and smaller than 2mm in difference with the diameter of the workpiece, so that one end of the workpiece is inserted into the limiting groove 16, the workpiece is not prone to tilt, if the difference between the groove diameter of the limiting groove 16 and the diameter of the workpiece is larger than 2mm, the workpiece is prone to tilt when one end of the workpiece is inserted into the limiting groove 16, and when the pressing component 12 presses the workpiece, the workpiece needing to tilt is straightened, so that the positioning efficiency of the workpiece is affected.

Referring to fig. 1, in some embodiments, the supporting component 11 includes a supporting component 111 and a supporting component 112, one side of the supporting component 111 is provided with a receiving groove 113 and a limiting groove 16, and is detachably connected to the pressing component 12, and the supporting component 112 is detachably connected to the other side of the supporting component 111 for supporting the supporting component 111.

In this way, the supporting member 111 is detachably connected to the pressing member 12, so that the pressing member 12 can be taken out and the workpiece can be positioned in the limiting groove 16, and the workpiece can be fixed more conveniently and quickly. In addition, the supporting member 111 and the supporting member 112 are detachably connected to facilitate the assembling, disassembling and replacing of the supporting member 111, when workpieces with different diameters need to be fixed, the supporting member 111 having the limiting grooves 16 with different specifications and the first fixing grooves 151 can be directly replaced, so that the fixing device 10 can fix workpieces with different specifications, and the application range of the fixing device 10 is improved.

Referring to fig. 2 and fig. 3, in some embodiments, the bottom wall of the receiving groove 113 is provided with a receiving groove 17, the fixing device 10 further includes an adsorbing component 13, the adsorbing component 13 includes a first protrusion 131, a second protrusion 134 and an adsorbing member 132, the first protrusion 131 is disposed on the bottom wall of the receiving groove 17 in a protruding manner and is received in the receiving groove 17, the second protrusion 134 is disposed on a side of the pressing component 12 facing the supporting member 111 in a protruding manner, and at least one of a surface of the first protrusion 131 facing the pressing component 12 and a surface of the second protrusion 134 facing the supporting member 111 is provided with a negative pressure groove 135. The pressing assembly 12, the bearing member 111 and the negative pressure groove 135 form a negative pressure chamber, and the suction member 132 penetrates the bearing member 111 and communicates with the negative pressure chamber. Illustratively, a negative pressure groove 135 is formed on one surface of the first protrusion 131 facing the pressing component 12 and one surface of the second protrusion 134 facing the bearing member 111; the first protrusion 131 has a negative pressure groove 135 on one surface facing the pressing component 12 or the second protrusion 134 has a negative pressure groove 135 on one surface facing the bearing 111.

So, the one end intercommunication of adsorbing the piece 132 compresses tightly subassembly 12, holds carrier 111 and the negative pressure groove 135 and encloses the negative pressure chamber of establishing the formation, and the other end intercommunication air pump of adsorbing the piece 132 can be taken away the air in the negative pressure chamber fast through the air pump to the messenger compresses tightly subassembly 12 and can fix fast to holding carrier 111 on, thereby has improved the fixed efficiency who compresses tightly subassembly 12.

Referring to fig. 2 and 4, in some embodiments, the outer circumference of the first protrusion 131 is provided with an outer chamfered slope 136, one surface of the second protrusion 134 facing the bearing member 111 is provided with a negative pressure groove 135, the inner circumference of the second protrusion 134 is provided with an inner chamfered slope 137, and the outer chamfered slope 136 is matched with the inner chamfered slope 137, so that the outer chamfered slope 136 fits the inner chamfered slope 137.

So, through setting up outer chamfer inclined plane 136 and interior chamfer inclined plane 137 for when second arch 134 and first arch 131 counterbalance, interior chamfer inclined plane 137 and the laminating of outer chamfer inclined plane 136, so that seal negative pressure groove 135, thereby make negative pressure groove 135's leakproofness better.

Referring to fig. 2, in some embodiments, a sealing groove 138 is disposed on a surface of the first protrusion facing the pressing element 12, the sealing groove 138 is disposed in the outer chamfered slant 136 and is coaxial with the outer chamfered slant 136, the suction element 13 further includes a sealing element 133, a portion of the sealing element 133 is received in the sealing groove 138 and abuts against the first protrusion 131, and another portion of the sealing element 133 is exposed out of the sealing groove 138 and is used for abutting against the second protrusion 134. Illustratively, the seal 133 may be a rubber seal.

Thus, when the pressing component 12 is accommodated in the accommodating groove 113 and fixes the workpiece, the side wall of the negative pressure groove 135 on the pressing member 121 abuts against the adsorbing member 132 and presses the sealing member 133, and the sealing member 133 seals the gap between the first protrusion 131 and the second protrusion 134, so that the sealing performance of the negative pressure cavity formed by surrounding the negative pressure groove 135, the pressing component 12 and the adsorbing member 132 is better, and the sealing performance of the negative pressure cavity is improved.

Referring to fig. 1, in some embodiments, the support member 112 includes an upper support plate 1121, a lower support plate 1122 and a support pillar 1123, one end of the support pillar 1123 is connected to the upper support plate 1121, the other end of the support pillar 1123 is connected to the lower support plate 1122, the carrier 111 is connected to a side of the upper support plate 1121 opposite to the support pillar 1123, the fixing device 10 further includes a fastening assembly 14, the fastening assembly 14 penetrates through the upper support plate 1121 and the carrier 111, a portion of the fastening assembly 14 is accommodated between the upper support plate 1121 and the lower support plate 1122, and the carrier 111 is detachably connected to the upper support plate 1121 through the fastening assembly 14.

In this way, the upper support plate 1121 and the lower support plate 1122 are respectively connected by two ends of the support column 1123, so that a receiving space is formed between the upper support plate 1121 and the lower support plate 1122, so as to provide a mounting space for the fastening assembly 14.

Referring to fig. 3 and 5, in some embodiments, the bottom wall of the receiving groove 17 is provided with a fastening groove 144, the fastening groove 144 and the first protrusion 131 are disposed at an interval, the bottom wall of the fastening groove 144 is provided with a through hole 145 to communicate the inside and the outside of the fastening groove 144, the fastening assembly 14 includes a rotating member 142 and a fastening member 141, one end of the rotating member 142 penetrates through the upper supporting plate 1121 and extends into the fastening groove 144 through the through hole 145, the fastening member 141 is connected to one end of the rotating member 142 and disposed in the fastening groove 144, a lower end surface of the fastening member 141 and a bottom wall of the fastening groove 144 are located on the same plane, a length of the fastening member 141 in the second direction is greater than a width of the through hole 145 in the third direction, and the driving member 143 is connected to the other end of the rotating member 142 and the upper supporting plate 1121, wherein the driving member 143 is configured to drive the rotating member 142 to drive the fastening member 141 to rotate until the fastening member 141 abuts against the bottom wall of the fastening groove 144, so that the supporting member 111 is fixed to the upper supporting plate 1121.

So, when driving piece 143 drives rotating member 142 and rotates, rotating member 142 drives fastener 141 and rotates, the lower wall of fastener 141 leaves and rotates from the up end of perforating hole 145 until supporting the diapire of fastening groove 144, at this moment, fastener 141 compresses tightly carrier 111 through fastening groove 144, thereby realize the fixed of carrier 111, when driving piece 143 drives rotating member 142 and counter-rotates, rotating member 142 drives fastener 141 and counter-rotates to the up end of perforating hole 145, and the lower wall of fastener 141 leaves the diapire of fastening groove 144, at this moment, fastener 141 no longer compresses tightly carrier 111, thereby realize compressing tightly the dismantlement of piece 121, consequently, drive rotating member 142 and fastener 141 counter-rotation through driving piece 143 can realize the dismantlement of carrier 111, thereby the dismouting efficiency of carrier 111 has been improved.

In this embodiment, the shape of the fastening member 141 is substantially rectangular parallelepiped and fits the through hole 145, when the fastening member 141 is in the initial state, the extending direction of the long side of the fastening member 141 and the length direction of the through hole 145 are both in the second direction, the extending direction of the short side of the fastening member 141 and the width direction of the through hole 145 are both in the third direction, and the height direction of the fastening member 141 is the third direction perpendicular to the first direction and the second direction.

Referring to fig. 2, in some embodiments, the pressing assembly 12 includes a pressing member 121 and a handle 122, a second protrusion 134 is protruded from a side of the pressing member 121 facing the bearing member 111, a first fixing groove 151 is circumferentially disposed along the pressing member 121, the pressing member 121 is detachably connected to the bearing member 111, and the handle 122 is connected to a side of the pressing member 121 facing away from the negative pressure groove 135. Therefore, the pressing piece 121 is taken and placed through the handle 122, so that the taking and the placing of the pressing piece 121 are more convenient and flexible.

Referring to fig. 2, in some embodiments, the plurality of limiting grooves 16 and the plurality of first fixing grooves 151 are disposed along the circumferential direction of the accommodating groove 113 at equal intervals, and the second fixing grooves 152 are disposed along the circumferential direction of the pressing element 12 at equal intervals. Thus, when a plurality of workpieces are fixed on the fixing device 10, the workpieces are all arranged on the fixing device 10 in an annular shape, so that the load of the fixing device 10 is more balanced, and the stability of the fixing device 10 is improved.

The operation of the above described fixture 10 is substantially as follows:

firstly, the pressing piece 121 is separated from the bearing piece 111, and one ends of a plurality of workpieces are respectively inserted into the corresponding limiting grooves 16;

then, the pressing member 121 is placed in the accommodating groove 113, and the pressing member 121 is matched with the plurality of first fixing grooves 151 on the bearing member 111 through the plurality of second fixing grooves 152, so that each first fixing groove 151 and the corresponding second fixing groove 152 abut against two opposite sides of the corresponding workpiece, thereby simultaneously clamping and fixing the plurality of workpieces;

finally, the pressing piece 121 is sucked by the suction assembly 13 to fix the pressing piece 121 to the carrier 111, thereby completing simultaneous fixing of the plurality of workpieces.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A fixture for holding a plurality of workpieces, comprising:

the bearing assembly is provided with an accommodating groove, a plurality of limiting grooves and a plurality of first fixing grooves, the limiting grooves are formed in the bottom wall of the accommodating groove and are arranged at intervals along the circumferential direction of the accommodating groove, the first fixing grooves are formed in the side wall of the accommodating groove, and each first fixing groove is communicated with one limiting groove;

the pressing assembly is arranged in the accommodating groove and detachably connected with the bearing assembly, the pressing assembly is provided with a plurality of second fixing grooves, the second fixing grooves are arranged at intervals along the circumferential direction of the pressing assembly and correspond to the first fixing grooves one to one, and each second fixing groove and the corresponding first fixing groove are used for respectively abutting against two opposite sides of the workpiece.

2. The fixing device of claim 1, wherein the first fixing groove and the second fixing groove are defined to form a fixing groove, and a projected area of the fixing groove projected onto the bottom wall of the accommodating groove along the first direction is smaller than an area of the limiting groove projected onto the bottom wall of the accommodating groove along the first direction.

3. The fixture apparatus of claim 1, wherein the carrier assembly comprises:

the holding groove and the limiting groove are formed in one side of the bearing piece, and the bearing piece is detachably connected with the pressing component;

and the supporting piece is detachably connected to the other side of the bearing piece and used for supporting the bearing piece.

4. The fixing device as claimed in claim 3, wherein the bottom wall of the receiving groove is formed with a receiving groove, the fixing device further comprises an adsorbing component, and the adsorbing component comprises:

the first bulge is convexly arranged on the bottom wall of the accommodating groove and is accommodated in the accommodating groove;

the second bulge is convexly arranged on one side, facing the bearing piece, of the pressing component, at least one of one surface, facing the pressing component, of the first bulge and one surface, facing the bearing piece, of the second bulge is provided with a negative pressure groove, and the pressing component, the bearing piece and the negative pressure groove form a negative pressure cavity;

and the adsorption piece penetrates through the bearing piece and is communicated with the negative pressure cavity.

5. The fixture of claim 4,

first bellied periphery is equipped with outer chamfer inclined plane, the protruding orientation of second hold the one side of carrier and seted up the negative pressure groove, the bellied interior week of second is equipped with interior chamfer inclined plane, outer chamfer inclined plane with interior chamfer inclined plane looks adaptation, so that outer chamfer inclined plane laminating interior chamfer inclined plane.

6. The fixture of claim 5,

one surface of the first bulge facing the compression assembly is provided with a sealing groove, and the sealing groove is arranged in the outer chamfer inclined surface and is coaxial with the outer chamfer inclined surface;

the adsorption assembly further comprises a sealing element, one part of the sealing element is contained in the sealing groove and abuts against the first bulge, and the other part of the sealing element is exposed out of the sealing groove and used for abutting against the second bulge.

7. The fixture according to claim 4,

the supporting piece comprises an upper supporting plate, a lower supporting plate and a supporting column, one end of the supporting column is connected with the upper supporting plate, the other end of the supporting column is connected with the lower supporting plate, and the bearing piece is connected to one side, away from the supporting column, of the upper supporting plate;

the fixing device further comprises a fastening component, the fastening component penetrates through the upper supporting plate and the bearing component, part of the fastening component is contained in the upper supporting plate and between the lower supporting plates, and the bearing component is detachably connected to the upper supporting plate through the fastening component.

8. The fixing device as claimed in claim 7, wherein a bottom wall of the receiving groove is formed with a fastening groove spaced apart from the first protrusion, the bottom wall of the fastening groove is formed with a through hole communicating an inside and an outside of the fastening groove, and the fastening assembly includes:

one end of the rotating piece penetrates through the upper supporting plate and extends into the fastening groove through the through hole;

the fastening piece is connected with one end of the rotating piece and arranged in the fastening groove, the lower end face of the fastening piece and the plane of the bottom wall of the fastening groove are positioned on the same plane, and the length of the fastening piece in the second direction is larger than the width of the through hole in the third direction;

the driving piece is connected with the other end of the rotating piece and the upper supporting plate; wherein the content of the first and second substances,

the driving piece is used for driving the rotating piece to drive the fastening piece to rotate until the fastening piece abuts against the bottom wall of the fastening groove, so that the bearing piece is fixed on the upper supporting plate.

9. The fixture apparatus of claim 4, wherein the hold down assembly comprises:

the second bulge is convexly arranged on one side, facing the bearing piece, of the pressing piece, the first fixing groove is circumferentially arranged along the pressing piece, and the pressing piece is detachably connected with the bearing piece;

the handle is connected to one side of the pressing piece deviating from the negative pressure groove.

10. The fixture of claim 1,

the limiting groove and the first fixing grooves are arranged along the circumferential direction of the accommodating groove at equal intervals, and the second fixing grooves are arranged along the circumferential direction of the pressing assembly at equal intervals.

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