CN217200111U - Centering jig - Google Patents

Abstract

The utility model relates to a storage location technical field discloses a centering tool. The centering jig comprises a supporting component, two clamping components, two identical elastic components, a rotating shaft and a laser emitter, wherein the supporting component comprises a substrate and two supporting plates arranged on the substrate along a first direction, the two clamping components are movably connected with the two supporting plates along the first direction respectively and symmetrically arranged relative to the center line of a connecting line of the two supporting plates along the first direction, two ends of each elastic component along the first direction are respectively connected with the supporting plates and the clamping components at the corresponding ends, the rotating shaft extends along a second direction and is rotatably supported on the supporting component, the rotating shaft is located at the middle point of the connecting line of the two supporting plates along the first direction, and the laser emitter is connected with the rotating shaft and can swing around the axis of the second direction so as to enable the laser emitter to emit laser beams along the plumb direction. The utility model discloses the higher centering precision also can be guaranteed to the centering tool under the condition that has certain incline after its centre gripping treats the holder.

Description

Centering jig

Technical Field

The utility model relates to a storage location technical field especially relates to a centering tool.

Background

With the continuous development of the AGV (Automated Guided Vehicle) technology, it is more and more widely applied to the field of smart storage technology. When getting/putting the goods from the storage support body, the AGV dolly needs fix a position earlier, usually, subaerial storage support body of following places the two-dimensional code along the position at predetermined direction center corresponding to, AGV passes through the location between discernment two-dimensional code realization and the storage support body.

In the prior art, the centering jig is provided with a laser transmitter along the center of the preset direction, and in the use process, the centering jig is fixed on the storage rack body firstly, the centering jig is aligned with the positioning jig along the center of the preset direction, then the laser transmitter transmits laser to the ground, and the transmitted laser can indicate the position corresponding to the center of the goods shelf along the preset direction on the ground. However, in the practical application process, due to factors such as inclination of the centering jig after the centering jig clamps the storage rack and deviation of the fixed position of the laser emitter on the centering jig caused by manufacturing errors of the storage rack body or operation errors of operators, the light emitted by the laser emitter is deflected, the position indicated by the laser emitter is deviated, and finally the accuracy of the two-dimensional code pasting position is poor.

Therefore, a centering jig is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centering tool also can guarantee higher centering precision under the circumstances such as certain incline after the holder is treated to centering tool centre gripping.

To achieve the purpose, the utility model adopts the following technical proposal:

a centering jig comprising:

the supporting assembly comprises a substrate and two supporting plates arranged on the substrate along a first direction;

the two clamping components are respectively movably connected with the two supporting plates along the first direction and are symmetrically arranged relative to the middle line of the connecting line of the two supporting plates along the first direction;

two ends of each elastic component along the first direction are respectively connected with the supporting plate and the clamping component at the corresponding end;

the rotating shaft extends along a second direction and is rotatably supported on the supporting assembly, the rotating shaft is positioned at the midpoint of a connecting line of the two supporting plates along the first direction, and the second direction is perpendicular to the first direction;

and the laser emitter is connected with the rotating shaft and can swing around the axis in the second direction, so that the laser emitter can emit laser beams along the plumb direction.

Preferably, the centering jig further includes:

the first end of the swinging piece is fixedly connected with the rotating shaft so as to swing around an axis in the second direction;

the swinging limiting block is shaped like a U and is arranged on the base plate, the second end of the swinging piece extends into the swinging limiting block, and the swinging limiting block can limit the swinging angle of the swinging piece.

Preferably, the centering jig further comprises an electronic digital display level gauge, the electronic digital display level gauge is fixedly connected with the laser emitter, and a placing reference surface of the electronic digital display level gauge is perpendicular to the laser beam emitted by the laser emitter.

Preferably, the support assembly comprises a linear bearing fixedly connected with the substrate, and the rotating shaft penetrates through the linear bearing and can rotate around the axis of the rotating shaft in the linear bearing;

and the first stop part and the second stop part are connected with the rotating shaft and respectively butt against two end faces of the linear bearing perpendicular to the axial direction.

Preferably, the centering jig further comprises a locking assembly, the locking assembly is connected with the supporting assembly and sleeved on the rotating shaft, and the locking assembly can selectively abut against the rotating shaft in the radial direction.

Preferably, the centering jig further comprises a positioning plate fixedly connected with the base plate, the midpoint of the positioning plate in the first direction coincides with the midpoint of a connecting line of the two support plates in the first direction, and the positioning plate is provided with a positioning groove.

Preferably, the supporting component further includes a guide sleeve, the guide sleeve is connected with the supporting plate and axially extends along the first direction, the clamping component includes a guide pillar and a clamping plate group, the guide pillar is in sliding fit with the guide sleeve, the clamping plate group is disposed at the first end of the guide pillar, and the elastic component is sleeved on the guide pillar.

Preferably, the clamping assembly further includes a limiting member connected to the second end of the guide pillar, and the limiting member and the clamping plate group are respectively located at two sides of the corresponding supporting plate.

Preferably, the clamping plate groups comprise first surfaces perpendicular to the first direction, the first surfaces of the two clamping plate groups being respectively used for abutting against two surfaces of the member to be clamped perpendicular to the first direction;

the clamping plate groups comprise second surfaces, the second surfaces are parallel to the first direction and the second direction, and the second surfaces of the two clamping plate groups are used for being abutted to the same surface of the piece to be clamped.

Preferably, the substrate is provided with an avoidance hole;

the clamping plate group is arranged on one side of the base plate, the clamping assembly further comprises a shifting block, the shifting block is connected with the clamping plate group and can extend out of the avoiding hole to the other side of the base plate.

The utility model discloses beneficial effect does:

the utility model discloses a centering tool, when using, with two symmetrical clamping components centre gripping respectively treat the holder along the both ends of first direction, because two elastic component are identical, and do not exert external force along the first direction, so two elastic component along the deflection of first direction the same, thereby make the pivot that is located two backup pad midpoints coincide with treat the holder along the midpoint of first direction, do not need the manual measurement to treat the holder along the midpoint of first direction, convenient operation; the whole that pivot and laser emitter constitute is eccentric structure, so this moment under the effect of gravity, pivot and laser emitter can take place the swing around the axis of second direction together, can rotate and stop in the plummet direction until laser emitter's transmitting terminal, and then take place the laser beam along the plummet direction, with mark subaerial and treat the position that the holder corresponds from top to bottom along first direction center, and have under the circumstances of certain skew after treating the holder at the centre setting tool centre gripping, also can guarantee the accuracy of the laser beam direction that laser emitter transmitted, and then guarantee the precision of the laser beam at subaerial position of instructing.

Drawings

Fig. 1 is a schematic structural view of a centering fixture provided in an embodiment of the present invention at a viewing angle;

fig. 2 is an exploded schematic view of a centering jig according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a centering jig according to another embodiment of the present invention.

In the figure:

1-a support assembly; 11-a substrate; 111-avoiding holes; 12-a support plate; 121-mounting holes; 13-guide sleeve; 14-a linear bearing; 15-bearing seats; 16-a positioning plate; 161-positioning groove;

2-a clamping assembly; 21-guide pillars; 22-clamping plate group; 221-a first baffle; 2211-a first surface; 222-a second baffle; 2221-a second surface; 23-a stop; 24-a shifting block;

3-an elastic component; 31-an elastic member;

41-a rotating shaft; 42-a first stop; 43-a second stop; 44-a locking assembly; 441-the sleeve member; 442-moving parts;

51-a swinging member; 52-swing stoppers;

61-a laser emitter; 62-electronic digital display level meter; 63-a positioning element; 64-briquetting; 65-a support frame;

7-a handle;

8-two-dimensional code.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a centering jig, which can conveniently and accurately find the position, corresponding to the middle point of a to-be-clamped piece placed on a bearing surface along a first direction, of the bearing surface up and down. In this embodiment, the detailed description will be given by taking the bearing surface as the ground and the to-be-clamped member as the storage rack body placed on the ground, and using the centering fixture to find the position on the ground corresponding to the middle point of the storage rack body along the first direction.

As shown in fig. 1 and 2, the X direction represents a first direction, the Y direction represents a second direction, and the X direction is perpendicular to the Y direction. The centering jig comprises a supporting component 1, two clamping components 2, two identical elastic components 3, a rotating shaft 41 and a laser emitter 61, wherein the supporting component 1 comprises a substrate 11 and two supporting plates 12 arranged on the substrate 11 along a first direction, the two clamping components 2 are movably connected with the two supporting plates 12 along the first direction respectively and symmetrically arranged relative to the center line of the two supporting plates 12 along the line of the first direction, two ends of each elastic component 3 along the first direction are connected with the supporting plates 12 and the clamping components 2 at the corresponding ends respectively, the rotating shaft 41 extends along a second direction and is rotatably supported on the supporting component 1, the rotating shaft 41 is located at the middle point of the line of the two supporting plates 12 along the first direction, and the laser emitter 61 is connected with the rotating shaft 41 and can swing around the axis of the second direction so that the laser emitter 61 can emit laser beams along the plumb direction.

When the centering jig of the embodiment is used, the two symmetrically-arranged clamping assemblies 2 are respectively clamped at two ends of the storage rack body along the first direction, and because the two elastic assemblies 3 are completely the same and no external force is applied along the first direction, the deformation of the two elastic assemblies 3 along the first direction is the same, so that the rotating shaft 41 at the midpoint of the two supporting plates 12 is coincided with the midpoint of the storage rack body along the first direction; at this moment, the whole body formed by the rotating shaft 41 and the laser emitter 61 is of an eccentric structure, so under the action of gravity, the rotating shaft 41 and the laser emitter 61 can swing together around the axis in the second direction until the emitting end of the laser emitter 61 rotates and stays in the plumb direction, and at this moment, the laser beam emitted by the laser emitter 61 can mark the position, corresponding to the storage rack body up and down along the center in the first direction, on the ground. The centering jig of this embodiment does not need the manual measurement storage frame body along the mid point of first direction, but relies on the same principle that the elastic component 3 deflection is the same under the same stress state, makes pivot 41 directly reach the storage frame body along the center of first direction to can guarantee higher positioning accuracy. And under the condition that the centering jig has certain deflection after clamping the storage rack body, the accuracy of the direction of the laser beam emitted by the laser emitter 61 can be ensured, and the accuracy of the laser beam on the position indicated on the ground is further ensured. In addition, since the elastic member 3 has a certain deformation range, the centering jig can be applied to the centering operation of the magazine body having a size different in the first direction.

Preferably, as shown in fig. 1, the centering jig further comprises a handle 7, and the handle 7 is connected with the base plate 11, so that an operator can conveniently pick and place the centering jig. In the present embodiment, the centering jig includes two handles 7, and the two handles 7 are provided at both ends of the base plate 11 in the first direction. In other embodiments, the specific number of the handles 7 is not limited.

Specifically, in this embodiment, as shown in fig. 1 and fig. 2, the support assembly 1 further includes a bearing seat 15 and a linear bearing 14, the bearing seat 15 is fixed on the base plate 11 and located at a midpoint of a connection line of the two support plates 12 along the first direction, the linear bearing 14 is fixed on the bearing seat 15 and has an axis extending along the second direction, the rotating shaft 41 is inserted through the linear bearing 14 so as to be rotatable around the axis along the second direction, and the laser emitter 61 fixedly connected to the rotating shaft 41 can swing around the axis along the second direction. Preferably, as shown in fig. 2, the centering fixture further includes a first stopper 42 and a second stopper 43, the first stopper 42 and the second stopper 43 are connected to the rotating shaft 41 and respectively abut against two end surfaces of the linear bearing 14 perpendicular to the axial direction, that is, by providing the first stopper 42 and the second stopper 43, the rotating shaft 41 can be prevented from moving in the second direction. Specifically, in the present embodiment, the first stop member 42 is a baffle fixedly connected to one end of the rotating shaft 41, the second stop member 43 is a nut, and the other end of the rotating shaft 41 is provided with a thread, and the nut is in threaded fit with the rotating shaft 41, so that the rotating shaft 41 can be conveniently mounted on the linear bearing 14.

In this embodiment, as shown in fig. 1 and fig. 2, the centering fixture further includes a positioning member 63 and a pressing block 64, wherein the positioning member 63 is fixedly connected to the first stopper 42, and the pressing block 64 fixes the laser emitter 61 on the positioning member 63, so as to achieve the fixed connection between the laser emitter 61 and the rotating shaft 41.

Preferably, as shown in fig. 2, the centering jig further includes an electronic digital display level 62, the electronic digital display level 62 is fixedly connected to the laser emitter 61, and a placement reference surface of the electronic digital display level 62 is perpendicular to the laser beam emitted by the laser emitter 61, so that whether the laser beam emitted by the laser emitter 61 is in the direction of the plumb can be reflected through the horizontal state displayed by the electronic digital display level 62, the operation process of the centering jig is more convenient, and when the laser beam emitted by the laser emitter 61 is not in the direction of the plumb, the centering jig can be conveniently found and adjusted by an operator in time. Specifically, in this embodiment, the centering fixture further includes a supporting frame 65, the supporting frame 65 is fixedly connected to the positioning member 63, and a placing surface for placing the electronic digital display level 62 is disposed on the supporting frame 65, and the placing surface is perpendicular to the laser beam emitted by the laser emitter 61. It should be noted that the electronic digital display level 62 may be any one of the prior art, and is not limited herein.

Preferably, the centering jig further comprises a locking assembly 44, the locking assembly 44 is connected with the support assembly 1 and sleeved on the rotating shaft 41, and the locking assembly 44 can selectively abut against the rotating shaft 41 in the radial direction. The position of the rotating shaft 41 can be locked by the locking assembly 44 when the centering jig is not in use, thereby preventing the laser transmitter 61 from being damaged due to random rotation. Specifically, in this embodiment, the locking assembly 44 includes a sleeve member 441 and a movable member 442, wherein the sleeve member 441 is fixedly connected to the bearing seat 15, an end portion of the rotating shaft 41 penetrates through the sleeve member 441, the movable member 442 radially penetrates through the sleeve member 441, the movable member 442 is in threaded connection with the sleeve member 441, when the movable member 442 is rotated, the movable member 442 moves radially so as to abut against the rotating shaft 41, at this time, the rotating shaft 41 cannot rotate, so as to lock the rotating shaft 41, and when the rotating shaft 41 needs to rotate, the movable member 442 is rotated reversely, so that the movable member 442 is separated from the rotating shaft 41.

After the warehouse rack body is clamped by the two clamping assemblies 2, the rotating shaft 41 and the laser emitter 61 swing around the rotating shaft 41 until the emitting end of the laser emitter 61 stops in the plumb direction, a certain time is needed, if the swinging angle of the laser emitter 61 is too large, the time of the whole swinging process is prolonged, and therefore the centering efficiency is reduced.

Preferably, as shown in fig. 2 and 3, the centering fixture further includes a swinging member 51 and a swinging limiting block 52, a first end of the swinging member 51 is fixedly connected to the rotating shaft 41 to swing around an axis in the second direction, the swinging limiting block 52 is u-shaped and is disposed on the base plate 11, a second end of the swinging member 51 extends into the swinging limiting block 52, and the swinging limiting block 52 can limit the maximum swinging angle of the swinging member 51, so that the total time from the beginning of swinging to the final emission end of the laser emitter 61 stopping in the plumb direction can be reduced, and the centering efficiency can be greatly improved. It should be noted that, the maximum allowable swing angle of the swing member 51 (and the maximum swing angle of the laser emitter 61) can be adjusted by adjusting the distance between the two opposite side walls of the swing stopper 52, and the specific value can be selected according to actual needs, which is not limited herein.

In some use scenarios, the two-dimensional code 8 needs to be adhered to the middle point of the warehousing shelf body along the first direction. Preferably, as shown in fig. 2 and 3, the centering jig further includes a positioning plate 16 fixedly connected to the base plate 11, a midpoint of the positioning plate 16 along the first direction coincides with a midpoint of a connection line of the two support plates 12 along the first direction, a positioning groove 161 is disposed on the positioning plate 16, and the positioning groove 161 can be used as a reference for adhering the two-dimensional code 8 to a midpoint of the warehouse rack body along the first direction, so that the two-dimensional code 8 can be adhered more conveniently.

Preferably, as shown in fig. 1 and 2, the support assembly 1 further includes a guide sleeve 13, the guide sleeve 13 is connected to the support plate 12 and axially extends along a first direction, the clamping assembly 2 includes a guide post 21 and a clamping plate group 22, the guide post 21 is slidably engaged with the guide sleeve 13, and the clamping plate group 22 is disposed at a first end of the guide post 21. Through the cooperation of guide pillar 21 and guide pin bushing 13, can make the motion process of centre gripping subassembly 2 for backup pad 12 more smooth and easy, and guarantee that centre gripping subassembly 2 direction of motion does not take place the incline, and then make respectively with the stress state unanimity of the elastic component 3 of being connected of two backup pads 12, guarantee that the position of pivot 41 can accurately coincide with the middle point of storage frame body along first direction. Specifically, in the present embodiment, as shown in fig. 2, a mounting hole 121 is provided on the support plate 12, and the guide sleeve 13 is inserted through the mounting hole 121 and fixed on the support plate 12 by a fastener such as a bolt.

Further, as shown in fig. 2 and 3, the clamping assembly 2 further includes a limiting member 23 connected to the second end of the guide pillar 21, the limiting member 23 and the clamping plate group 22 are respectively located at two sides of the corresponding supporting plate 12, the limiting member 23 can abut against the end surface of the guide sleeve 13, that is, the limiting member 23 limits the movement range of the whole clamping assembly 2 along the first direction, so as to prevent the guide pillar 21 from coming off from the guide sleeve 13. In this embodiment, the stopper 23 is fixed to the end of the guide post 21 by a fastener such as a bolt or a screw. In the present embodiment, as shown in fig. 1, two clamping plate sets 22 are located on the inner sides of the two supporting plates 12 (i.e. at positions between the two supporting plates 12), correspondingly, the stoppers 23 are located on the outer sides of the two supporting plates 12, and the elastic component 3 is connected between the inner sides of the supporting plates 12 and the clamping plate sets 22. Preferably, the elastic component 3 includes an elastic member 31, the elastic member 31 may be a spring, the spring is sleeved on the guide post 21, and the guide post 21 may guide a deformation direction of the spring, so as to ensure that the elastic component 3 deforms only along the first direction.

Preferably, in the present embodiment, as shown in fig. 2, each clamping assembly 2 includes two guide pillars 21 arranged in parallel, and the two guide pillars 21 are arranged along the second direction, so that the movement direction of the clamping plate group 22 relative to the corresponding support plate 12 is more precise. Further, the elastic assembly 3 includes two elastic members 31, the two elastic members 31 are identical, and two ends of each elastic member 31 along the first direction are respectively connected to the supporting plate 12 and the clamping plate group 22, and are correspondingly sleeved on one guide pillar 21, so as to ensure that the stress of the clamping plate group 22 along the Z direction is more uniform and balanced. Of course, in other embodiments, each clamping assembly 2 may include three or more guide pillars 21, and correspondingly, each elastic assembly 3 may include three or more elastic members 31, which are selectively disposed according to actual needs, and are not limited herein.

Preferably, as shown in fig. 2, the clamping plate groups 22 include first surfaces 2211, the first surfaces 2211 are perpendicular to the first direction (X direction), the first surfaces 2211 of the two clamping plate groups 22 are respectively used for abutting against two surfaces of the storage rack body perpendicular to the first direction, and through the cooperation between the surfaces, it is ensured that the acting force between the two clamping assemblies 2 and the corresponding storage rack body is more uniform and more stable, and further, the stress state of the two sets of elastic assemblies 3 is kept consistent. Further, as shown in fig. 2, the clamping plate groups 22 further include second surfaces 2221, the second surfaces 2221 are parallel to the first direction and the second direction (i.e., parallel to the X-Z plane), and the second surfaces 2221 of the two clamping plate groups 22 are used for abutting against the same surface of the storage rack body, so that the whole centering jig support is more stable.

Specifically, in the present embodiment, as shown in fig. 2, the clamping plate set 22 includes a first baffle 221 and a second baffle 222, the guide pillar 21 is connected to the first baffle 221, the second baffle 222 is connected to a side of the first baffle 221 away from the guide pillar 21, the first surface 2211 is disposed on the first baffle 221, and the second surface 2221 is disposed on the second baffle 222. Optionally, the first baffle 221 and the second baffle 222 are separate structures, and the first baffle 221 and the second baffle 222 are fixedly connected by a fastener such as a bolt. In other embodiments, the first baffle 221 and the second baffle 222 may also be integrally formed, and may be selectively disposed according to actual needs, which is not limited herein.

Preferably, as shown in fig. 2 and 3, a dodging hole 111 is formed in the base plate 11, the clamping plate group 22 is arranged on the lower side of the base plate 11, the clamping assembly 2 further comprises a shifting block 24, the shifting block 24 is connected with the clamping plate group 22 and can extend out of the dodging hole 111 to the upper side of the base plate 11, and through the arrangement of the shifting block 24, an operator can pull the clamping assembly 2 along the first direction more conveniently to clamp the two ends of the storage frame body along the first direction, so that the centering process is more convenient.

Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and for those skilled in the art, there are variations on the specific embodiments and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A centering jig, comprising:

the supporting assembly (1) comprises a base plate (11) and two supporting plates (12) arranged on the base plate (11) along a first direction;

the two clamping components (2) are respectively movably connected with the two supporting plates (12) along the first direction and are symmetrically arranged relative to the middle line of the connecting line of the two supporting plates (12) along the first direction;

two identical elastic assemblies (3), wherein two ends of each elastic assembly (3) along the first direction are respectively connected with the supporting plate (12) and the clamping assembly (2) at the corresponding end;

the rotating shaft (41) extends along a second direction and is rotatably supported on the supporting assembly (1), the rotating shaft (41) is positioned at the midpoint of a connecting line of the two supporting plates (12) along the first direction, and the second direction is perpendicular to the first direction;

and the laser emitter (61) is connected with the rotating shaft (41) and can swing around the axis of the second direction, so that the laser emitter (61) can emit laser beams along the plumb direction.

2. The centering jig of claim 1, further comprising:

a swinging piece (51), wherein a first end of the swinging piece (51) is fixedly connected with the rotating shaft (41) so as to swing around an axis in a second direction;

the U-shaped swinging limiting block (52) is arranged on the base plate (11), the second end of the swinging piece (51) extends into the swinging limiting block (52), and the swinging limiting block (52) can limit the swinging angle of the swinging piece (51).

3. The centering jig according to claim 1, characterized in that the centering jig further comprises an electronic digital display level gauge (62), the electronic digital display level gauge (62) is fixedly connected with the laser emitter (61), and a placement reference surface of the electronic digital display level gauge (62) is perpendicular to a laser beam emitted by the laser emitter (61).

4. A centering fixture according to claim 1, characterized in that said supporting assembly (1) comprises a linear bearing (14) fixedly connected to said base plate (11), said rotating shaft (41) being inserted through said linear bearing (14) and being able to rotate about its own axis inside said linear bearing (14);

and the first stop piece (42) and the second stop piece (43) are connected with the rotating shaft (41) and respectively abut against two end faces, perpendicular to the axial direction, of the linear bearing (14).

5. The centering jig according to claim 1, characterized in that it further comprises a locking assembly (44), said locking assembly (44) being connected to said supporting assembly (1) and being sleeved on said rotating shaft (41), said locking assembly (44) being able to selectively abut radially against said rotating shaft (41).

6. A centering jig according to claim 1 further comprising a positioning plate (16) fixedly connected to the base plate (11), a midpoint of the positioning plate (16) in a first direction coinciding with a midpoint of a line connecting the two support plates (12) in the first direction, the positioning plate (16) being provided with a positioning groove (17).

7. A centering jig according to any one of claims 1 to 6, characterized in that said supporting member (1) further comprises a guide sleeve (13), said guide sleeve (13) being connected to said supporting plate (12) and extending axially along said first direction, said clamping member (2) comprising a guide post (21) and a clamping plate group (22), said guide post (21) being in sliding engagement with said guide sleeve (13), said clamping plate group (22) being arranged at a first end of said guide post (21), said elastic member (3) being fitted over said guide post (21).

8. A centering fixture according to claim 7, characterized in that said clamping assembly (2) further comprises a stop (23) connected to a second end of said guide post (21), said stop (23) and said set of clamping plates (22) being located on either side of the corresponding support plate (12).

9. A centering jig according to claim 7, characterized in that said groups of clamping plates (22) comprise a first surface (2211), said first surface (2211) being perpendicular to said first direction, the first surfaces (2211) of two said groups of clamping plates (22) being intended to abut respectively two surfaces of the piece to be clamped perpendicular to said first direction;

the clamping plate groups (22) comprise second surfaces (2221), the second surfaces (2221) are parallel to the first direction and the second direction, and the second surfaces (2221) of the two clamping plate groups (22) are used for abutting with the same surface of a member to be clamped.

10. A centering fixture according to claim 7, characterized in that said base plate (11) is provided with relief holes (111);

clamping plate group (22) set up one side of base plate (11), clamping component (2) still include shifting block (24), shifting block (24) with clamping plate group (22) are connected, and can certainly dodge hole (111) and stretch out to the opposite side of base plate (11).

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