CN210514607U

CN210514607U - Calibration system and calibration support thereof

Info

Publication number: CN210514607U
Application number: CN201920362874.XU
Authority: CN
Inventors: 赖毕望
Original assignee: Autel Intelligent Technology Corp Ltd
Current assignee: Autel Intelligent Technology Corp Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-05-12
Anticipated expiration: 2029-03-20

Abstract

The utility model relates to a vehicle calibration field discloses a calibration system and demarcation support thereof, and the demarcation support includes base, grudging post subassembly and beam assembly. The grudging post subassembly includes first pole setting and second pole setting, and the one end detachably of first pole setting is installed in the base, and the second pole setting is connected with first pole setting, and first pole setting can be with the length of second pole setting intussuseption or folding in order to reduce the grudging post subassembly. The beam assembly is supported by the riser assembly. The utility model discloses an in the demarcation support, first pole setting detachably install in the base can make base and first pole setting phase separation, conveniently marks loading, the transport of support. In addition, the first vertical rod and the second vertical rod can be overlapped or folded, so that the length of the vertical frame assembly can be reduced, and the loading and the carrying of the calibration support are further facilitated.

Description

Calibration system and calibration support thereof

Technical Field

The invention relates to the technical field of vehicle maintenance and equipment calibration, in particular to a calibration system and a calibration support thereof.

Background

An Advanced Driver Assistance System (ADAS) is an active safety technology that collects environmental data inside and outside a vehicle at the first time by using various sensors mounted on the vehicle, and performs technical processing such as identification, detection, tracking and the like of static and dynamic objects, so that a Driver can perceive a possible danger at the fastest time to draw attention and improve safety. The ADAS uses sensors, such as cameras, radars, lasers, and ultrasonic waves, which detect light, heat, pressure, or other variables used to monitor the state of the vehicle, and are usually located in the front and rear bumpers, side-view mirrors, and the inside of the steering column or on the windshield of the vehicle. In the use process of a vehicle, the physical installation state of the sensor can be changed due to vibration, collision, environment temperature and humidity and the like, so that irregular calibration or calibration is required.

When calibrating or calibrating the sensor, a calibration element is usually mounted on a calibration bracket to calibrate or calibrate the sensor on the vehicle. However, most of the existing calibration supports have large volume, large floor space, complex assembly and difficult relocation.

Disclosure of Invention

The embodiment of the invention aims to provide a calibration system and a calibration bracket thereof, which can solve the technical problem that a calibration element is difficult to move in the prior art.

The embodiment of the invention adopts the following technical scheme for solving the technical problems:

a calibration stand, comprising:

a base;

the stand component comprises a first vertical rod and a second vertical rod, one end of the first vertical rod is detachably mounted on the base, the second vertical rod is connected with the first vertical rod, and the first vertical rod and the second vertical rod can be telescoped or folded to reduce the length of the stand component; and

a beam assembly supported by the stand assembly.

Optionally, the stand assembly includes a base mount mounted to one of the base and the first upright and fastenable to the other such that the second upright is fixed to the base, the base mount also being detachable from the other such that the first upright is detachable from the base.

Optionally, one of the first vertical rod and the base is provided with a first limiting structure, and the other is provided with a second limiting structure, and the first limiting structure and the second limiting structure can be matched with each other to limit the first vertical rod to move relative to the base.

Optionally, the first limiting structure is a limiting groove, the second limiting structure is a limiting rod, and the limiting rod can be clamped in the limiting groove and abut against at least one part of the edge of the limiting groove.

Optionally, the limiting groove is a through hole radially communicating the large hole site and the small hole site, and the limiting rod can pass through the large hole site and then be clamped in the small hole site.

Optionally, the base fixture includes a pulling handle and a snap;

the wrenching handle is pivotally connected to the base and can rotate around a pivot joint;

one end of the fastener is connected to the wrenching handle and can rotate along with the wrenching handle;

the pulling handle is rotated to enable the other end of the fastener to be fastened to or separated from the first vertical rod.

Optionally, the first vertical rod is provided with an inverted hook portion, and the fastener can be fastened to the inverted hook portion, so that the base is fixedly connected with the first vertical rod.

Optionally, the second vertical rod is disposed inside or sleeved outside the first vertical rod, and the second vertical rod can move relative to the first vertical rod along the length direction of the first vertical rod;

the beam assembly is supported by the second upright.

Optionally, the first and second uprights are non-circular in cross-section.

Optionally, one of the first vertical rod and the second vertical rod comprises a guide rail, and the other one of the first vertical rod and the second vertical rod can only move along the length direction of the first vertical rod under the guidance of the guide rail.

Optionally, the stand assembly includes a driving mechanism, the driving mechanism is mounted to the first vertical rod and is configured to drive the second vertical rod to move relative to the first vertical rod along the length direction of the first vertical rod.

Optionally, an end of the first upright remote from the base is pivotally connected to an end of the second upright such that the second upright is foldable relative to the first upright.

Optionally, the one end that the base was kept away from to first pole setting is provided with first hasp spare, the one end of second pole setting is provided with the second hasp spare, first hasp spare with but the mutual hasp of second hasp spare, with the second pole setting is buckled in first pole setting.

Optionally, the stand assembly comprises a third upright connected to the second upright, the third upright and the second upright being telescopically collapsible or foldable to reduce the length of the stand assembly.

Optionally, the cross member assembly comprises a cross member, the cross member being removably mounted to the riser assembly.

Optionally, the beam assembly comprises a mount, the mount being supported by the riser assembly;

the cross beam comprises a connecting part, and the connecting part of the cross beam is detachably arranged in the mounting seat and is supported by the stand assembly through the mounting seat.

Optionally, the mounting is provided on a top surface of the stand assembly.

Optionally, the mounting seat encloses to establish and forms an installation passageway, and the installation passageway is not closed and leaves the breach, the crossbeam install in the installation passageway, the breach is used for conveniently will the crossbeam passes through the breach install in the installation passageway, and conveniently pass through the breach will the crossbeam is followed the installation passageway takes out.

Optionally, the mounting seat includes a first limiting mechanism, and the connecting portion includes a second limiting mechanism adapted to the first limiting mechanism;

the first limiting mechanism is matched with the second limiting mechanism to limit the cross beam in the mounting seat.

Optionally, the mounting seat is provided with a fixing mechanism, and the fixing mechanism presses the cross beam onto the mounting seat, so that the cross beam is pressed onto the bottom surface and one side surface of the mounting seat.

Optionally, the crossbeam includes left crossbeam portion, right crossbeam portion and connecting portion, connecting portion detachably install in the grudging post subassembly, the one end pivotally connected in of connecting portion left crossbeam portion, the other end pivotally connected in of connecting portion right crossbeam portion.

The embodiment of the invention also adopts the following technical scheme for solving the technical problems:

a calibration system comprising a calibration element and a calibration support as described above, the calibration element being loadable from the calibration support.

Compared with the prior art, in the demarcation support of this embodiment, first pole setting detachably install in the base can make base and first pole setting phase separation, makes things convenient for the loading, the transport of demarcation support. In addition, the first vertical rod and the second vertical rod can be overlapped or folded, so that the length of the vertical frame assembly can be reduced, and the loading and the carrying of the calibration support are further facilitated.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a perspective view of a calibration fixture for mounting a multi-line laser according to an embodiment of the present invention;

FIG. 2 is a perspective view of another angle of the calibration stand shown in FIG. 1;

FIG. 3 is a perspective view of the calibration bracket shown in FIG. 1 with the beam assembly of the calibration bracket in a folded condition;

FIG. 4 is a partial perspective view of the calibration bracket shown in FIG. 1;

FIG. 5 is a schematic view of a calibration system aligned to an automobile using a mounted multi-line laser of the calibration fixture shown in FIG. 1;

FIG. 6 is a schematic view of the assembly of a base fixture with an upright, with the upper portions of the base and upright omitted, according to some embodiments;

FIG. 7 is an exploded view of the base fixture of FIG. 6;

FIG. 8 is a schematic view of the assembly of a base fixture with an upright shown in accordance with other embodiments, wherein the base and upright are omitted;

FIG. 9 is a schematic view of the assembly of a base fixture with an upright shown in accordance with further embodiments, wherein the base and upright are omitted;

FIG. 10 is a schematic view of the support base and stop bar shown in FIG. 9;

FIG. 11 is a schematic view of the assembly of a base fixture and an upright shown in accordance with further embodiments, wherein the base and upright are omitted;

FIG. 12 is a schematic view of the support base and stop lever of FIG. 11;

FIG. 13 is an exploded view of the base fixture of FIG. 11;

FIG. 14 is a schematic view of the assembly of a base fixture with an upright shown in accordance with further embodiments, wherein the base and upright are omitted;

FIG. 15 is a schematic view of the assembly of a base fixture with an upright shown in accordance with further embodiments, wherein the base and upright are omitted;

figure 16 is an exploded view of the base fixture of figure 15;

FIG. 17 is a perspective view of the stand assembly of the calibration stand shown in FIG. 1;

FIG. 18 is a perspective view of the stand assembly shown in FIG. 6 with some components omitted;

FIG. 19 is a perspective view of a stand assembly shown with portions of elements omitted, according to some embodiments;

FIG. 20 is a perspective view of a stand assembly according to other embodiments shown with some components omitted;

FIG. 21 is an exploded view of the drive mechanism of the stand assembly shown in FIG. 20;

FIG. 22 is a perspective view of the drive mechanism shown in FIG. 20 in a first state;

FIG. 23 is a perspective view of the drive mechanism shown in FIG. 20 in a second state;

FIG. 24 is a perspective view of the drive mechanism shown in FIG. 20 in a third state;

FIG. 25 is a perspective view of a stand assembly according to still further embodiments;

FIG. 26 is an exploded view of the stand assembly shown in FIG. 25;

FIG. 27 is a perspective view of a stand assembly according to still further embodiments;

FIG. 28 is an exploded view of the stand assembly shown in FIG. 27;

FIG. 29 is a partial cross-sectional view of the riser assembly shown in FIG. 27;

FIG. 30 is a partial schematic view of a stand assembly shown in accordance with some embodiments;

FIG. 31 is a partial schematic view of a stand assembly shown in accordance with further embodiments;

FIG. 32 is an extended perspective view of the stand assembly shown in FIG. 31;

FIG. 33 is a partial cross-sectional view of the riser assembly shown in FIG. 31;

FIG. 34 is a partial cross-sectional view of the riser assembly shown in FIG. 32;

FIG. 35 is another angled partial cross-sectional view of the riser assembly shown in FIG. 32;

FIG. 36 is a partial cross-sectional view at another angle of the riser assembly shown in FIG. 31;

FIG. 37 is a perspective view of the cross-beam assembly of the calibration bracket shown in FIG. 1;

FIG. 38 is a cross-sectional view of the cross-beam assembly shown in FIG. 37;

FIG. 39 is an exploded view of the cross-beam assembly shown in FIG. 37;

fig. 40 is a partially enlarged view of a portion a in fig. 37;

FIG. 41 is an exploded view of an adjustment mechanism of the cross-beam assembly shown in FIG. 37;

FIG. 42 is an exploded view of another angle of the adjustment mechanism shown in FIG. 37;

FIG. 43 is an assembly view of a mount and a beam shown in accordance with some embodiments;

FIG. 44 is a perspective view of the cam handle of the mount shown in FIG. 43;

FIG. 45 is an assembly view of a mount and adjustment mechanism shown in accordance with some embodiments;

FIG. 46 is an assembly view of the mount and adjustment mechanism shown in FIG. 45, with parts omitted;

FIG. 47 is a perspective view of the articulation mechanism of the cross-beam assembly shown in FIG. 37;

FIG. 48 is a perspective view of another angle of the articulating mechanism shown in FIG. 37;

FIG. 49 is a cross-sectional view of the articulating mechanism shown in FIG. 48;

FIG. 50 is a perspective view of an articulation mechanism shown in accordance with some embodiments;

FIG. 51 is a cross-sectional view of the articulating mechanism shown in FIG. 50;

FIG. 52 is a schematic view of a first and second fastener component shown overlapping each other, according to some embodiments;

FIG. 53 is a perspective view of an articulation mechanism shown in accordance with still further embodiments;

FIG. 54 is a perspective view of a locking cam handle of the articulation mechanism shown in FIG. 53;

FIG. 55 is a perspective view of a calibration system according to another embodiment, wherein the calibration system includes a calibration bracket and a calibration element, the calibration element is a mirror and is mounted on the calibration bracket;

FIG. 56 is a perspective view of the calibration system shown in FIG. 55 with the mirror replaced with a pattern plate, the pattern plate being carried by a calibration support;

FIG. 57 is an assembly view of the transom assembly and the riser assembly shown with the transom assembly carrying the first and second mounts for carrying the small indexing elements, in accordance with some embodiments;

FIG. 58 is an alternative angle assembly view of the cross-beam assembly and riser assembly shown in FIG. 57;

FIG. 59 is a further angular assembly view of the cross-beam assembly and the riser assembly shown in FIG. 57, in this condition the calibration brackets are used to carry large calibration elements, such as pattern plates;

fig. 60 is a cross-sectional view of a target mount and a beam shown in accordance with some embodiments.

Detailed Description

In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used in this specification, the terms "upper," "lower," "inner," "outer," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be considered limiting of the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, 2 and 3, an exemplary calibration bracket 100 of the present invention includes a base 10, a stand assembly 20 and a beam assembly 30. The stand assembly 20 comprises a first upright 22 and a second upright 24, the first upright 22 is detachably mounted on the base 10, and the first upright 22 and the second upright 24 can be telescoped or folded to reduce the length of the stand assembly 20.

Since the base 10 is generally heavy and heavy, the first upright 22 is detachably mounted on the base 10, so that the base 10 can be separated from the first upright 22, and the calibration stand 100 can be conveniently loaded and transported. In addition, the first upright 22 and the second upright 24 can be telescoped or folded, which can reduce the length of the stand assembly 20, and further facilitate the loading and carrying of the calibration stand 100. Moreover, when the first upright 22 and the second upright 24 are foldable, the base 10 can be separated from the first upright 22, so that the first upright 22 and the second upright 24 can be more conveniently folded.

The cross beam assembly 30 comprises a cross beam, and the cross beam is detachably mounted on the stand assembly 20, so that the cross beam can be separated from the stand assembly 20, and the loading and the carrying of the calibration support 100 are further facilitated.

The cross beam comprises a first cross beam portion 32, a second cross beam portion 34 and a connecting portion 36, the connecting portion 36 is mounted on the stand assembly 20, one end of the connecting portion 36 is hinged to the first cross beam portion 32, and the other end of the connecting portion 36 is hinged to the second cross beam portion 34. The first beam portion 32 and the second beam portion 34 can each be rotated toward each other relative to the connecting portion 36 to fold the beam assembly 30, and the first beam portion 32 and the second beam portion 34 can also each be rotated away from each other relative to the connecting portion 36 to unfold the beam assembly 30. When the calibrating support is moved, the cross beam is folded, so that the size of the calibrating support 100 can be reduced, and the calibrating support is convenient to assemble and transport.

In the present embodiment, the first beam portion 32 is a left beam portion, and the second beam portion 34 is a right beam portion.

In the embodiment of the present invention, the "installation" includes fixing or limiting a certain element or device to a specific position or place by welding, screwing, clipping, adhering, and the like, the element or device may be fixed or movable in a limited range in the specific position or place, and the element or device may or may not be detachable after being fixed or limited to the specific position or place, which is not limited in the embodiment of the present invention. As shown, the connecting portion 36 is mounted on the stand assembly 20, but the connecting portion 36 may be supported by the stand assembly 20 in other manners, for example, the connecting portion 36 may be mounted on an appropriate side of the stand assembly 20.

In the embodiment of the present invention, the term "support" refers to bearing the weight of a certain element or device so that it does not move downward due to its own weight.

The beam assembly 30 may be used to mount calibration elements, such as a multi-line laser 200, calibration targets, radar reflecting or absorbing devices, etc., to calibrate the vehicle-mounted assisted steering system.

Alternatively, the left and

right beam portions

32, 34 may be rotated toward each other with respect to the connecting portion 36, and they may be folded together downward, or folded together upward, forward, and rearward, for example. Optionally, when the left beam portion 32 and the right beam portion 34 are folded downward, the length of the connecting portion 36 may be relatively short, and the left beam portion 32 and the right beam portion 34 are in a sagging state, so that the beam assembly 30 may not need to be taken off from the stand assembly 20, the occupied space of the calibration support 100 may also be significantly reduced, and the calibration support may be conveniently carried by a vehicle. When the left beam portion 32 and the right beam portion 34 are folded upward, forward, and rearward, a device for rotating the beams may be provided so that the final folding direction of the left beam portion 32 and the right beam portion 34 is downward, or both may be in a drooping state; or the length of the connecting portion 36 can be relatively long, and the left and right folded

beam portions

32 and 34 can be placed against the connecting portion 36 and fixed to the connecting portion 36 by a releasable fixing device. In the latter case, to further reduce the space occupied by the calibration support 100, the cross member assembly 30 may be removed from the stand assembly 20, carried to a desired location, and then mounted on the stand assembly 20.

It will be appreciated by those skilled in the art that the manner in which the beam assembly 30 is folded is not limited to that described above. For example, the beam may be folded to two ends, where there are no connections 36; the cross beam can also be folded into four or more sections. But preferably three sections, since this leaves the beam mid-section unbroken, it is possible to use only one fastening member at the mid-section and to fix the beam stably and evenly to the uprights.

The base 10 includes a base body 12, a roller 14, a height adjuster 16, and a tab 18.

The base body 12 is a triangular claw shape, and includes three claw portions extending in three different directions. The base body 12 may be made of a metallic material.

The rollers 14 are mounted on the bottom surface of the base body 12, the number of the rollers 14 may be three, and each roller 14 is mounted on the end of a corresponding one of the claws for facilitating movement of the base body 12. In this embodiment, the roller 14 is a universal moving roller, so that the base body 12 can move freely back and forth, left and right.

The height adjusting member 16 is mounted to the base body 12 for adjusting the height of the base body 12. In this embodiment, the height adjusting members 16 are adjusting knobs, the number of the adjusting knobs is three, and at least one section of screw rod is arranged below the adjusting knobs, and the screw rod is matched with the screw thread of the through hole at the base body 12, so that the height adjustment can be realized. Each of the height adjusting members 16 is mounted to a corresponding one of the claw portions and is adjacent to a corresponding one of the rollers 14, and the three height adjusting members 16 are distributed in a regular triangle.

The pull ring 18 may be mounted on an upper surface of one of the jaws for facilitating pulling of the calibration support 100.

It is understood that in some other embodiments, the shape of the base body 12 may vary according to actual needs, and is not limited to being triangular claw-shaped, for example, the base body 12 may be rectangular or circular; the number of the rollers 14 and the height adjusting members 16 can be increased or decreased according to actual requirements, for example, for a triangular claw-shaped base body 12, two height adjusting members can be provided, and then a supporting leg with a fixed height is matched to adjust the angle of the base body 12.

In some embodiments, referring to fig. 4, the base body 12 further defines a recess 122, and the two claw portions are respectively located on two opposite sides of the recess 122 and are symmetrical with respect to the recess 122. Referring to fig. 5, when the calibration bracket 100 is aligned with the vehicle, the multi-line laser 200 is mounted on the beam assembly 30, the multi-line laser 200 emits two fan-shaped light rays 210 perpendicular to the ground and perpendicular to each other, and the two fan-shaped light rays 210 pass through the recess 122 to be aligned with the cross-shaped mark 220 disposed on the ground. The recess 122 is formed in the base body 12, so that the structure is simple, and the operation of aligning the calibration bracket 100 with the automobile is facilitated. It will be appreciated that the recess 122 is used in situations where the intersection of two intersecting and perpendicular laser lines is used to locate the calibration support 100. When the base body 12 is in other shapes, a recess or a hole may be similarly disposed at a corresponding position of the base body 12, so that the intersection point of the laser lines for positioning the calibration support 100 can be hit on the ground.

Referring to fig. 3 again, the base 10 further includes a base fixing member 40, the base fixing member 40 can be installed on one of the base 10 and the first vertical rod 22, and the base fixing member 40 can apply a restraining force to the other one to limit the movement of the first vertical rod 22 relative to the base 10, that is, to fix the first vertical rod 22 to the base 10, where the restraining force can be a pulling force or a pushing force. The direction of the constraining force can be set according to actual needs, for example, the constraining force can be arranged in parallel with the base body 11, or can be arranged in an inclined angle with the base body 11.

It will be understood that the number of the base fixing members 40 can be selected according to actual needs, and it is only necessary that all the restraining forces exerted by the base fixing members 40 on the first vertical rod 22 can balance the forces exerted on the first vertical rod 22 and fasten the first vertical rod 22 to the base body 11, that is, the restraining forces act together to limit the movement of the first vertical rod 22 relative to the base body 11, so as to achieve the fixed mounting of the first vertical rod 22 to the base 10.

It will be appreciated that even when a certain amount of external force is applied to the first upright 22, the first upright 22 can still be fastened to the base 10 under the connection of the base fixing member 40, for example, when a calibration element is mounted on the first upright 22, the gravity center of the calibration element is not coincident with the geometric outline center of the supporting surface of the base 10 on which the first upright 22 stands, which may cause the first upright 22 to have a tendency to tilt in a certain direction relative to the base 10, and at this time, the corresponding base fixing member 40 is fixed due to its relative position with the base 10 and the first upright 22, so that the base fixing member 40 can increase its restraining force on the first upright 22 in the opposite direction to balance the force applied to the first upright 22, so that the first upright 22 stands firmly on the base 10.

The detachment of the first upright 22 from the base 10 can be achieved by removing each of the restraining forces applied to the first upright 22, i.e. disengaging the base mount 40 from the first upright 22 or the base 10, i.e. removing the connection between the first upright 22 and the base 10

Referring to fig. 6 and 7, in some embodiments, the base fixing member 40 connects the first vertical rod 22 and the base 10 by a snap-fit manner. The number of the base fixing members 40 is three, and the three base fixing members 40 are regularly distributed by taking the first vertical rod 22 as a center. Since the first upright 22 is a square tube, preferably, two base fixing members 40 are respectively disposed at two adjacent corners of the bottom of the first upright 22 and respectively located on the extension lines of two diagonal lines of the bottom of the first upright 22; the other base fixing member 40 is disposed on the opposite side of the two adjacent corners, perpendicular to the borderline, and located at the midpoint of the borderline. The three base fixing pieces 40 are distributed in an isosceles triangle shape.

Each of the base fixing members 40 is fixedly installed on the base body 12, each of the base fixing members 40 can be fastened to the first vertical rod 22, and each of the base fixing members 40 is fixed with the relative position of the first vertical rod 22 and the base 10, each of the base fixing members 40 respectively applies a pulling force to the first vertical rod 22, and the three pulling forces balance and fasten the first vertical rod 22 to the base body 12. In this embodiment, three of the pulling forces are all disposed parallel to the base body 12, so that the first vertical rod 22 is balanced in force in a direction parallel to the base body 12. When the first vertical rod 22 is acted by external force and has a tendency to move along a certain direction relative to the base body 12, the corresponding one or two base fixing members 40 will increase the pulling force opposite to the certain direction, so as to balance the external force applied to the first vertical rod 22, and make the first vertical rod 22 keep still relative to the base body 12.

Of course, it is understood that the pulling force may also be disposed at an oblique angle with respect to the base body 12, and the base fixing member 40 applies a downward pulling force to the first vertical rod 22, the component of the pulling force being parallel to the base body 12 to balance the force applied by the first vertical rod 22 being parallel to the base body 12, and the component of the pulling force being perpendicular to the base body 12 to make the bottom of the first vertical rod 22 press the base body 12.

The first vertical rod 22 is provided with three inverted hook portions 28, each inverted hook portion 28 is fixedly connected to the bottom of the first vertical rod 22, and one inverted hook portion 28 corresponds to one base fixing member 40.

The inverted hook portion 28 is hook-shaped, and the base fixing member 40 can be fastened to the inverted hook portion 28 to apply a pulling force to the first vertical rod 22, so that the base 10 is fixedly connected to the first vertical rod 22. Preferably, the bent portion of the inverted hook 28 is disposed upward away from the base body 12 to facilitate the base fixing member 40 to snap the inverted hook 28; the bottom of the inverted hook 28 abuts against the base body 12, so that the first upright 22 is not easy to tilt relative to the base body 12.

The base fixing member 40 includes a pivot base 41, a pulling handle 42, a fastening member 43, and a fastening member 44.

The pivot base 41 is fixedly mounted on the base body 12 and is disposed opposite to the corresponding one of the inverted hooks 28. The pivot base 41 is provided with a pivot shaft 411.

The pulling handle 42 has a pivot hole 421, the pivot hole 421 of the pulling handle 42 is pivotally connected to the pivot shaft 411, and the pulling handle can rotate around the pivot shaft 411 relative to the pivot base 41. Adjusting blocks 428 are respectively arranged on two sides of the pulling handle 42, and the adjusting blocks 428 are fixedly connected to the pulling handle 42. The adjusting block 428 is provided with an adjusting hole, and the adjusting hole can change the position of the adjusting block relative to the pivot hole 421 with the rotation of the pulling handle 42.

The fastening member 43 has an Contraband-shaped structure, an open loop end of which is mounted on the pulling handle 42 and can rotate with the pulling handle 42, and a closed loop end of which is used for fastening the inverted hook 28, so that the base fixing member 40 fastens and connects the first vertical rod 22 and the base 10. Two sides of the open loop end of the fastening member 43 are respectively provided with a threaded portion 431, and the two threaded portions 431 respectively pass through the adjusting holes on two sides of the pulling handle 42 and can move along the adjusting holes relative to the adjusting block 428 to adjust the extending length of the fastening member 43 relative to the inverted hook portion 28.

Each of the threaded portions 431 is provided with two of the fastening members 44, respectively, and the two fastening members 44 are located at both sides of one of the adjustment holes, respectively, and are threadedly engaged with the threaded portions 431. Each of the fastening members 44 is rotatable and abuts against one side of the adjustment hole so that the fastening member 43 is fastened to the adjustment block 428; when the corresponding fastener 44 is loosened, the extending length of the fastening member 43 relative to the inverted hook portion 28 can be adjusted, so as to change the tension when the fastening member 43 is fastened to the inverted hook portion 28.

Of course, it is understood that the fastener 43 is not limited to the Contraband-shaped structure, and the fastener 43 may also be other structures having fastening connection with the inverted hook 28, such as an L-shaped structure, a T-shaped structure, a U-shaped structure, or the like; the fastening member 44 may be omitted, and the fastening member 43 is a frame fixedly connected to a screw, the frame is used for being fastened to the inverted hook 28, and the screw is directly connected to the adjusting block 428 by threads, so as to adjust the extending length of the fastening member 43 relative to the inverted hook 28.

The fastening member 43 can rotate with the pulling handle 42 relative to the pivot base 41 to change the position of the fastening member 43 relative to the inverted hook 28. Turning the pulling handle 42 causes the closed loop end of the fastener 43 to be fastened to or detached from the barb 28. Specifically, after the first vertical rod 22 is placed to a predetermined position, one of the fastening members 43 corresponds to one of the inverted hook portions 28. Each of the pulling handles 42 is rotated around a corresponding one of the pivot shafts 411 in a direction away from the first vertical rod 22, so that each of the fastening members 43 is fastened to a corresponding one of the inverted hooks 28, the three fastening members 43 respectively apply different directions of pulling forces to the three inverted hooks 28 to limit the movement of the first vertical rod 22 relative to the base 10, and the bottom surface of the first vertical rod 22 naturally abuts against the base body 12 under the action of its own gravity, so that the first vertical rod 22 is fixed to the base body 12. At this time, the bottom of the pulling handle 42 abuts against the pivot seat 41, so that the pivot seat 41 cannot continue to rotate around the pivot hole 421 in a direction away from the first vertical rod 22, and meanwhile, the vertical distance between the adjusting hole and the base body 12 is smaller than the vertical distance between the pivot hole 421 and the base body 12, so that the fastening member 43 and the inverted hook portion 28 are in a locked state, and even if the inverted hook portion 28 applies a reaction force to the closed loop end of the fastening member 43, the open loop end of the fastening member 43 cannot rotate around the pivot shaft 411, so that the fastening member 43 is separated from the inverted hook portion 28.

The first vertical rod 22 can be detached from the base 10 by rotating the pulling handle 42 about the pivot shaft 411 in a direction toward the first vertical rod 22, so that the fastening member 43 rotates along with the pulling handle 42 to change its position relative to the inverted hook 28, i.e., the fastening member 43 is disengaged from the inverted hook 28.

In this embodiment, the fastening members 43 of the three base fixing members 40 are fastened to the three inverted hooks 28, respectively, so as to fixedly mount the first vertical rod 22 on the base 10; the first vertical rod 22 can be detached from the base 10 by disengaging the fasteners 43 of the three base fasteners 40 from the three inverted hooks 28.

Referring to fig. 8, in some other embodiments, the number of the base fixing members 40 is two, two of the base fixing members 40 are symmetrically disposed on two sides of the first vertical rod 22, and the two first vertical rods 22 are located on the same straight line. Each of the base fixing members 40 is fixedly installed on the base body 12, each of the base fixing members 40 can be fastened to the first vertical rod 22, and each of the base fixing members 40 is fixed with the relative position of the first vertical rod 22 and the base 10, and each of the base fixing members 40 respectively applies a symmetrical pulling force to the first vertical rod 22, so that the first vertical rod 22 can be balanced and fastened to the base 10.

The first vertical rod 22 is provided with two inverted hook portions 28, each inverted hook portion 28 is fixedly connected to the bottom of the first vertical rod 22, and one inverted hook portion 28 corresponds to one base fixing member 40. The bent portion of the inverted hook 28 is disposed upward away from the base body 12, and the bottom of the inverted hook 28 abuts against the base body 12.

Preferably, in order to make the first vertical rod 22 stand on the base 10 stably and prevent the first vertical rod 22 from being unbalanced in force on both sides without the base fixing member 40, a supporting base 21 may be provided on the bottom surface of the first vertical rod 22. The support base 21 is a rectangular flat plate and is fixedly connected to the bottom surface of the first upright 22. The two ends of the supporting base 21 extend to the two sides of the first vertical rod 22 without tensile force, so as to increase the contact area between the first vertical rod 22 and the base body 12, so that the first vertical rod 22 can stably stand on the base 10 and is not easy to topple over relative to the base 10 to the two sides without tensile force.

In this embodiment, the fastening members 43 of the two base fixing members 40 are fastened to the two inverted hooks 28, respectively, so as to fixedly mount the first vertical rod 22 on the base 10; the first vertical rod 22 can be detached from the base 10 by disengaging the fasteners 43 of the two base fasteners 40 from the two inverted hooks 28.

Referring to fig. 9 and 10, in some embodiments, the number of the base fixing members 40 is one, and the base fixing members 40 are disposed on one side of the first vertical rod 22. The base fixing member 40 is fixedly installed on the base body 12, the base fixing member 40 can fasten the first vertical rod 22, and the relative positions of the base fixing member 40 and the first vertical rod 22 and the base 10 are fixed, and the base fixing member 40 applies a pulling force to the first vertical rod 22.

The bottom of the first upright 22 is provided with a support base 21, and the support base 21 is a substantially rectangular flat plate and is fixedly connected to the bottom surface of the first upright 22. The supporting base 21 extends to the periphery of the first vertical rod 22 to increase the contact area between the first vertical rod 22 and the base body 12, so that the first vertical rod 22 can stand on the base body 12 stably, and the first vertical rod 22 is prevented from falling easily when the calibration element is mounted on the base body.

The first vertical rod 22 is provided with an inverted hook portion 28, the inverted hook portion 28 is fixedly connected to the supporting base 21, the inverted hook portion 28 is opposite to the base fixing member 40, and the inverted hook portion 28 is used for being fastened and connected with a fastening member 43 of the base fixing member 40. The bent portion of the barb 28 is disposed upward away from the support base 21.

A limiting structure is arranged between the first vertical rod 22 and the base 10. Specifically, one of the first vertical rod 22 and the base 10 is provided with a first limiting structure, and the other is provided with a second limiting structure, the first limiting structure and the second limiting structure are mutually matched to limit the first vertical rod 22 to move relative to the base 10, so that when the fastener 43 of the base fixing member 40 fastens the inverted hook portion 28, the first vertical rod 22 is firmly erected on the base 10. The number of the base fixing pieces 40 required for fixing the first vertical rod 22 can be correspondingly reduced by arranging the first limiting structure and the second limiting structure which are matched with each other, the positioning between the first vertical rod 22 and the base 10 can be facilitated, and the installation and the disassembly of the first vertical rod 22 can be realized more quickly.

Further, the first limiting structure is a limiting hole 211, and the second limiting structure is a limiting rod 29. The limiting hole 211 is disposed in the supporting base 21, and the limiting rod 29 is fixedly connected to the base 10. In this embodiment, two of the limiting holes 211 are disposed at one side of the supporting base 21, two of the limiting rods 29 are disposed on the base body 12 corresponding to the two limiting holes 211, respectively, and one of the inverted hooks 28 is disposed at the opposite side of the two limiting holes 211 and located at the top of the supporting base 21. The two limiting holes 211 and the inverted hook portion 28 are distributed in an isosceles triangle.

The limiting rod 29 can pass through the limiting hole 211 and then be clamped in the limiting hole 211, when the fastening piece 43 of the base fixing piece 40 fastens the inverted hook portion 28, the pulling force of the base fixing piece 40 on the first vertical rod 22 enables the limiting rod 29 to be tightly abutted against the inner side wall of the limiting hole 211, namely, the base fixing piece 40 is matched with the limiting hole 211 and the limiting rod 29 to limit the first vertical rod 22 to move relative to the base 10, so that the first vertical rod 22 is fastened on the base 10.

Further, the limiting rod 29 is provided with a pressing cap 291, the pressing cap 291 is fixedly connected to a tail end of the limiting rod 29, and the pressing cap 141 is used for abutting against an edge of the limiting hole 211, that is, the pressing cap 291 abuts against an upper surface of the supporting base 21, so as to press the first vertical rod 22 on the base 10, so as to limit the movement of the first vertical rod 22 relative to the base 10 in a direction perpendicular to the base body 12. When the fastening member 43 of the base fixing member 40 fastens the inverted hook 28, the limiting rod 29 abuts against the inner side wall of the limiting hole 211 and the upper surface of the supporting base 21, so that the first vertical rod 22 is fixed to the base 10.

Further, the pressing cap 291 is provided with a first abutting surface 292, the edge of the limiting hole 211 is provided with a second abutting surface 2114, the first abutting surface 292 is matched with the second abutting surface 2114, and the first abutting surface 292 can abut against the second abutting surface 2114, so that the limiting hole 211 and the limiting rod 29 can be tightly connected, and a gap is prevented from occurring between the pressing cap 291 of the limiting rod 29 and the edge of the limiting hole 211 when the base fixing member 40 fastens the inverted hook portion 28. In this embodiment, the first abutting surface 292 and the second abutting surface 2114 are both inverted conical surfaces, and the pressing cap 291 can be tightly attached to the edge of the limiting hole 211, so that the limiting rod 29 can apply pressure on the inclined surface of the first vertical rod 22, and the stress on the first vertical rod 22 can be balanced from the angle of the inclined surface.

In this embodiment, the limiting hole 211 is a through hole having a large hole 2111 radially communicating with a small hole 2112, the small hole 2112 is located away from the inverted hook 28 compared to the large hole 2111, the diameter of the large hole 2111 is larger than that of the small hole 2112, the pressing cap 291 is a circular pressing cap 291, the diameter of the pressing cap 291 is smaller than or equal to that of the large hole 2111 and larger than that of the small hole 2112, and the diameter of the rod of the limiting rod 29 is matched with that of the small hole 2112. The limiting rod 29 can pass through the large hole 2111 and then be clamped in the small hole 2112, and the first abutting surface 292 of the pressing cap 291 abuts against the second abutting surface 2114 of the small hole 2112.

In this embodiment, the two limiting rods 29 are respectively passed through the two large hole portions 2111 and then clamped to the small hole portions 2112, and then the fastening component 43 of the base fixing component 40 is fastened to the inverted hook portion 28, so as to fixedly mount the first vertical rod 22 on the base 10; the first vertical rod 22 can be detached from the base 10 by disengaging the snap-fastener 43 of the base fixing member 40 from the snap-fastener and then disengaging the two limiting rods 29 from the two limiting holes 211, respectively.

Of course, it is understood that in some other embodiments, the base fixing members 40 are fixedly mounted to the first vertical rod 22, the inverted hook portions 28 are fixedly connected to the base body 12, one base fixing member 40 corresponds to one inverted hook portion 28, each base fixing member 40 can be respectively fastened to one corresponding inverted hook portion 28, so that the first vertical rod 22 is fixed to the base body 12, and each base fixing member 40 can also be respectively separated from one corresponding inverted hook portion 28, so that the first vertical rod 22 can be detached from the base body 12.

It is understood that in some other embodiments, the supporting base 21 may be omitted, the limiting hole 211 is directly disposed on the bottom of the first vertical rod 22, and the limiting rod 29 is directly disposed on the base 10, or the limiting hole 211 is directly disposed on the base 10, and the limiting rod 29 is directly disposed on the bottom of the first vertical rod 22; it can be understood that the number of the limiting structures can also be selected according to actual needs, and when the base fixing member 40 is only required to fasten the inverted hook portion 28, all the first limiting structures and the corresponding second limiting structures can be matched with each other, so that the first vertical rod 22 is fastened to the base 10, for example, three limiting rods 29 and one inverted hook portion 28 are arranged at the bottom of the first vertical rod 22, the base 10 is provided with the limiting holes 211 corresponding to the three limiting rods 29 one by one, and the three limiting holes 211 and the inverted hook portion 28 are distributed in a parallelogram shape.

The base fixing member 40 can be mounted to one of the base 10 and the first upright 22, and the base fixing member 40 can apply a restraining force to the other to limit the movement of the first upright 22 relative to the base 10, i.e., to fix the first upright 22 to the base 10, wherein the restraining force can be a pulling force or a pushing force. The direction of the constraining force can be set according to actual needs, for example, the constraining force can be set parallel to the base body 12, or can be set at an inclined angle to the base body 12.

It will be understood that the number of the base fixing members 40 can be selected according to actual requirements, and it is only necessary that all the restraining forces exerted by the base fixing members 40 on the first upright rod 22 can balance the forces exerted on the first upright rod 22 and fasten the first upright rod 22 to the base body 12, that is, the restraining forces act together to limit the movement of the first upright rod 22 relative to the base body 12, so as to achieve the fixed mounting of the first upright rod 22 to the base 10.

The detachment of the first upright 22 from the base 10 can be achieved by removing each of the restraining forces applied to the first upright 22, i.e. disengaging the base mount 40 from the first upright 22 or the base 10, i.e. removing the connection between the first upright 22 and the base 10.

Referring to fig. 11, in some other embodiments, the base fixing member 40a is a push-pull type structure, and the base fixing member 40a connects the first vertical rod 22 and the base 10 in a propping manner.

The number of the base fixing members 40a is one, and the base fixing members 40a are disposed on one side of the first vertical rod 22. The base fixing member 40a is fixedly installed on the base body 12, the base fixing member 40a can tightly support the first vertical rod 22, the relative positions of the base fixing member 40a and the first vertical rod 22 and the base 10 are fixed, and the base fixing member 40a applies a pushing force to the first vertical rod 22.

The supporting base 21 is disposed at the bottom of the first vertical rod 22, and the base 10 is fixedly connected to the bottom surface of the first vertical rod 22.

An abutting structure 24 is arranged on the supporting base 21, and the abutting structure 24 is fixedly connected to the top of the supporting base 21 and is arranged opposite to the base fixing part 40 a.

The supporting base 21 is provided with two limiting holes 211, and the base body 12 is correspondingly provided with two limiting rods 29. One of the stopper holes 211 corresponds to one of the stopper rods 29. The two limiting holes 211 are located on the opposite sides of the abutting structure 24, and the two limiting holes 211 and the abutting structure 24 are distributed in an isosceles triangle shape.

Referring to fig. 12, the limiting hole 211 is a U-shaped through slot, and the slot of the limiting hole 211 is disposed opposite to the abutting structure 24. The limiting rod 29 is provided with a pressing cap 291, the pressing cap 291 is provided with a first abutting surface 292, the edge of the limiting hole 211 is provided with the second abutting surface 2114, the first abutting surface 292 is matched with the second abutting surface 2114, and the first abutting surface 292 can abut against the second abutting surface 2114, so that the limiting hole 211 and the limiting rod 29 can be tightly connected. The first abutting surface 292 and the second abutting surface 2114 are both inverted conical surfaces, and the pressing cap 291 can be tightly attached to the edge of the limiting hole 211, so that the limiting rod 29 can apply pressure on the inclined surface to the first vertical rod 22, and the stress of the first vertical rod 22 can be balanced from the angle of the inclined surface.

Referring to fig. 13 to 15, the base fixing member 40a includes a pivot base 41a, a pulling handle 42a, a pushing shaft 43a and a connecting rod 44 a.

The pivot base 41a is fixedly mounted on the base body 12, a guide hole 411a is formed at the front end of the pivot base 41a, and the guide hole 411a is disposed opposite to the abutting structure 24. The rear end of the pivot base 41a is provided with a pivot shaft 412 a.

The pulling handle 42a has a first pivot hole 421a and a second pivot hole 428a, the first pivot hole 421a and the second pivot hole 428a are disposed in front of and behind each other, and the second pivot hole 428a of the pulling handle 42a is pivotally connected to the pivot shaft 412a and can rotate around the pivot shaft 412a relative to the pivot base 41 a.

The pushing shaft 43a is slidably mounted in the guiding hole 411a and can slide along the guiding hole 411a relative to the pivot seat 41 a. One end of the pushing shaft 43a is opened with a third pivot hole 431a, and the third pivot hole 431a is disposed away from the abutting structure 24.

The front end and the rear end of the connecting rod 44a are respectively provided with a first rotating shaft 441a and a second rotating shaft 442a, and the first rotating shaft 441a and the second rotating shaft 442a are respectively pivotally connected to the third pivot hole 431a of the pushing shaft 43a and the first pivot hole 421a of the pulling handle 42 a. The pulling handle 42a is rotated to slide the pushing shaft 43a along the guiding hole 411a in a certain stroke.

In this embodiment, after the two limiting rods 29 are fastened to the limiting holes 211, the pulling handle 42a is rotated around the pivot shaft 412a in a direction toward the first vertical rod 22, so that the pushing shaft 43a slides in a direction toward the abutting structure 24 along the guide hole 411a, and one end of the pushing shaft 43a abuts against the abutting structure 24, so as to fasten the first vertical rod 22 to the base 10, and at the same time, a vertical distance between a pivot joint of the second rotating shaft 442a of the connecting rod 44a and the first pivot hole 421a of the pulling handle 42a and the base body 12 is smaller than a vertical distance between a pivot joint of the first rotating shaft 441a of the connecting rod 44a and the third pivot hole 431a of the pushing shaft 43a and the base body 12, so that the pushing shaft 43a and the abutting structure 24 are in a locked state, even if the abutting structure 24 applies a reverse pushing force to the pushing shaft 43a, so that the push shaft 43a cannot disengage from the abutment structure 24.

The first upright rod 22 can be detached from the base 10 by rotating the pulling handle about the pivot shaft 412a in a direction away from the first upright rod 22, so that the pushing shaft 43a is disengaged from the abutting structure 24 along the guiding hole 411 a.

It will be appreciated that in some other embodiments, the support base 21 may be omitted, one of the limiting hole 211 and the limiting rod 29 being directly provided at the bottom of the first upright 22, the other being directly provided at the base 10; the abutting structure 24 can be omitted, and the pushing shaft 43a of the base fixing member 40a directly abuts against one side of the first vertical rod 22; of course, the number of the base fixing pieces 40a can also be selected according to actual needs, for example, four base fixing pieces 40a are regularly arranged around the first vertical rod 22, in order to enable the pushing shaft 43a of the base fixing piece 40a to be tightly fitted with the first vertical rod 22, the first vertical rod 22 can be provided with insertion holes which are arranged corresponding to the four pushing shafts 43a one to one, the insertion holes are blind holes, so that when the pushing shaft 43a abuts against the first vertical rod 22, at least part of the pushing shaft 43a is accommodated in the blind holes, so that the first vertical rod 22 is fastened to the base 10, and at this time, the limiting hole 211 and the limiting rod 29 can also be correspondingly omitted.

Referring to fig. 14, in some other embodiments, the base fixing member 40c is an eccentric wrench, so as to replace the base fixing member 40b in the embodiment of the push-pull type structure, and the first vertical rod 22 and the base 10 are connected in a propping manner. Correspondingly, the abutment structure 24 provided on the support base 21 may be omitted. Other technical contents are substantially the same as those of the embodiment of the push-pull type configuration.

The base fixing member 40c is disposed at opposite sides of the two limiting holes 211. The base fixing member 40c includes a supporting portion 41c and a pulling handle 42c, the supporting portion 41c includes a supporting curved surface 411c, the supporting portion 41c is provided with an eccentric hole 412c, the eccentric hole 412c deviates from the geometric outline center of the supporting curved surface 411c, and the pulling handle 42c is fixedly connected to the supporting portion 41 c. The eccentric hole 412c of the abutting portion 41c is pivotally connected to the base body 12, and the abutting curved surface 411c is disposed opposite to the side surface of the supporting base 21, and the abutting portion 41c can rotate around the eccentric hole 412c relative to the base body 12 to change the relative position of the abutting curved surface 411c and the supporting base 21.

In this embodiment, after the two limiting rods 29 are clamped in the limiting holes 211, the pulling handle 42c is rotated around the eccentric hole 412c in the direction toward the first vertical rod 22, so that the abutting curved surface 411c abuts against one side surface of the supporting base 21, and the first vertical rod 22 is fastened to the base 10.

The pulling handle can be rotated around the eccentric hole 412c in a direction away from the first vertical rod 22, so that the curved abutting surface 411c is separated from the supporting base 21, and the first vertical rod 22 can be detached from the base 10.

Referring to fig. 15, in some other embodiments, the base fixing member 40d has a horizontal structure. The bottom surface of the first upright 22 is provided with a support base 21.

The number of the base fixing members 40d is three, and the three base fixing members 40d are regularly arranged around the first vertical rod 22 as a center. The three base fixing members 40d are distributed in an isosceles triangle shape. The supporting base 21 is provided with three fixing holes 211 corresponding to the three base fixing pieces 40d, and the fixing holes 211 are used for being connected with the base fixing pieces 40d, so that the base fixing pieces 40d are fixedly connected with the first vertical rods 22 and the supporting base 21.

It is understood that in some other embodiments, the number of the base fixing members 40d is not limited to three, for example, four base fixing members 40d are respectively disposed on four sides of the first vertical rod 22, and the four base fixing members 40d are distributed in a parallelogram.

Referring to fig. 16, the base fixing member 40d includes a pivoting base 41d, a pulling handle 42d, a connecting rod 43d and a connecting member 43 d.

The pivot base 41d is fixedly mounted on the base body 12, a first pivot shaft 411d is disposed at a front end of the pivot base 41d, and a first pivot hole 412d is disposed at a rear end of the pivot base 41 d.

The front end and the rear end of the side link 44d are respectively provided with a first rotating shaft 441d and a second rotating shaft 442d, the second rotating shaft 442d is pivotally connected to the first pivot hole 412d, and the side link 44d can rotate around the first pivot hole 412d relative to the pivot base 41 d.

A second pivot shaft 431d and a second pivot hole 432d are respectively disposed at the upper and lower sides of one end of the connecting member 43d, the second pivot hole 432d is pivotally connected to the first pivot shaft 411d of the pivot base 41d, and the connecting member 43d can rotate around the first pivot shaft 411d relative to the pivot base 41 d. The other end of the connecting member 43d is provided with a fixing head 433d, the fixing head 433d is fixedly connected to the connecting member 43d, and the fixing head 433d is used for being fastened to the fixing hole 211, so that the first vertical rod 22 is fastened to the base 10. Fixed head 433d with fixed orifices 211 all is the back taper setting. One of the fixing heads 433d is provided corresponding to one of the fixing holes 211.

The pulling handle 42d is provided with a third pivot hole 421d and a fourth pivot hole 428d, the third pivot hole 421d and the fourth pivot hole 428d are disposed in front of and behind each other, the third pivot hole 421d is pivotally connected to the second pivot shaft 431d, and the fourth pivot hole 428d is pivotally connected to the first rotating shaft 441d of the connecting rod. The pulling handle 42d is rotated to move the fixing head 433d up and down relative to the fixing hole 211.

The pivot base 41d, the side link 44d, the connecting member 43d and the pulling handle 42d form a dual-rocker mechanism.

In this embodiment, after the first vertical rod 22 is placed to a predetermined position, one of the fixing heads 433d corresponds to one of the fixing holes 211. Each of the pulling handles 42d is pulled in a direction away from the first upright rod 22, so that each of the connecting members 43d rotates around the first pivot shaft 411d of the corresponding one of the pivot seats 41d, so that the corresponding one of the fixing heads 433d is fastened to the corresponding one of the fixing holes 211 from top to bottom, the three fixing heads 433d respectively apply different directions of constraint force to the three fixing holes 211 to limit the movement of the first upright rod 22 relative to the base, and the bottom surface of the first upright rod 22 naturally abuts against the base body 12 under the action of self gravity, so that the first upright rod 22 is fastened to the base body 12. At this time, the third pivot hole 421d and the fourth pivot hole 428d of the pulling handle 42d are aligned with the first pivot hole 412d of the pivot base 41d, and the mechanism is at the dead point position, so that the fixed head 433d cannot be separated from the fixed hole 211 even if the supporting base 21 applies a large reaction force to the fixed head 433 d.

The first vertical rod 22 can be detached from the base by pulling the pulling handle 42d toward the first vertical rod 22, so that the fixing head 433d is separated from the fixing hole 211 from the bottom to the top.

It can be understood that when there is no first limit structure and no second limit structure disposed between the first vertical rod 22 and the base 10, a positioning structure may be disposed between the first vertical rod 22 and the base, for example, a groove or a concave surface or a positioning hole is disposed on the first vertical rod 22, and the base 10 is disposed with a convex rail or a convex surface or a positioning post, so that the first vertical rod 22 can be quickly placed at a correct position by the positioning structure, and the positioning structure can also play a certain limit role in limiting the first vertical rod 22.

Referring to fig. 17 and 18, the stand assembly 20 may further include a driving mechanism 26, in this embodiment, the first vertical rod 22 is a fixed vertical rod, the second vertical rod 24 is a movable vertical rod, the movable vertical rod 24 is sleeved in the fixed vertical rod 22, the movable vertical rod 24 is movable relative to the fixed vertical rod 22 along the length direction of the fixed vertical rod 22, and the driving mechanism 26 is mounted on the fixed vertical rod 22 and is configured to drive the movable vertical rod 24 to move relative to the fixed vertical rod 22 along the length direction of the fixed vertical rod 22. The beam assembly 30 is mounted to the top surface of the mobile upright 24 so that the center of gravity of the beam assembly 30 is closer to the center of gravity of the upright assembly 20 than in conventional calibration stands, which increases the stability of the calibration stand and allows the use of a smaller footprint of the base body 12. The mode that the movable vertical rod 24 and the fixed vertical rod 22 are sleeved and connected is used, the height of the stand assembly 20 can be reduced to be approximately half of the original height, and the stand assembly 20 can be very suitable for being placed in a rear tail box of a vehicle such as an automobile to be carried by matching with the folding of the cross rod assembly 30.

Optionally, the fixed vertical rod 22 and the movable vertical rod 24 are square tubes, and the movable vertical rod 24 is tightly sleeved in the fixed vertical rod 22, so that the movable vertical rod 24 can only move relative to the fixed vertical rod 22 along the length direction of the fixed vertical rod 22, and the movable vertical rod 24 can be prevented from moving in other directions relative to the fixed vertical rod 22. This configuration is important to achieving the collapsibility of the calibration stand 100 because it is generally necessary to utilize the fixed relative positional relationship between the various components of the calibration stand 100 during calibration, for example, it is possible to mount a laser on the outer surface of the fixed upright 22 that is used to locate the center axis of the vehicle to determine the relative position of the target carried on the beam assembly 30 with respect to the vehicle. Therefore, if the relative position of each component is changed slightly, the calibration precision is affected, or an additional fine adjustment mechanism is required to compensate. If the relative position of the components varies greatly, it may also lead to failure of the added additional fine adjustment mechanism. Thus, in a telescopic manner, relative movements between the mobile upright 24 and the fixed upright 22 other than along the length, such as relative rotations, are to be excluded. One convenient way is for the moving upright 24 to be square with the fixed upright 22, thus ensuring only longitudinal relative movement between the two.

It will be understood that in some other embodiments, the fixed upright 22 and the mobile upright 24 can also be tubes of other shapes, for example, tubes with a cross section of mutually matching polygons, so that the mobile upright 24 can only move relative to the fixed upright 22 along the length of the fixed upright 22, and so that the mobile upright 24 is prevented from moving in other directions relative to the fixed upright 22. Here, "mutually fit" does not necessarily require that the fixed upright 22 and the mobile upright 24 have the same cross-section, for example, the cross-section of the fixed upright 22 arranged outside may be hexagonal, and the cross-section of the mobile upright 24 arranged inside may be quadrangular bordering on the hexagonal, and the same effect may be achieved that the mobile upright 24 can only move relative to the fixed upright 22 in the length direction of the fixed upright 22. The fixed upright 22 and said mobile upright 24 can also have a cross section in the form of mutually cooperating oval cylindrical tubes, the oval cross section also limiting to a certain extent the relative rotation between them. When the cross sections of the fixed vertical rod and the movable vertical rod are non-circular, the pipe wall of the whole fixed vertical rod is used as a guide rail to guide the moving direction of the movable vertical rod.

The fixed vertical rod 22 and the movable vertical rod 24 may also be cylindrical pipes with circular cross sections, and at this time, the fixed vertical rod 22 may be prevented from rotating relative to the movable vertical rod 24 by a guide mechanism, so as to guide the movable vertical rod 24 to stably move relative to the fixed vertical rod 22, or a mechanism for detecting and adjusting the movement of the fixed vertical rod 22 in the length direction relative to the movable vertical rod 24 is additionally arranged at other parts of the calibration bracket 100. A simple guiding mechanism is a guide rail and a slider device cooperating with it, where the fixed upright 22 and said moving upright 24 are provided with a guide rail on one of them and a slider device such as a bump, plastic strip, roller, ball, gear, etc. on the other, where the slider device will be limited to the guide rail and also ensure that only a relative movement in the length direction will occur between the two uprights. The guide rail can be a groove, a linear protrusion, a rack and the like additionally arranged on the pipe wall of the vertical rod, or a groove, a linear protrusion, a groove and the like formed between two linear protrusions and the like formed on the pipe wall of the vertical rod, namely the vertical rod uses a special-shaped pipe wall, and the shape of the pipe wall is provided with the groove, the linear protrusion and the like which can be used as the guide rail. Similarly, the sliding block device can be an additional part additionally arranged on the pipe wall of the vertical rod, and can also be a protruding structure formed by the pipe wall of the vertical rod, and the additional part is not required to be arranged on the pipe wall of the vertical rod. In addition, the mechanism that the rack and the like realize transmission through meshing also has a guiding function, and the description also puts the mechanism into the category of the guide rail. The guiding effect can also be achieved by a gear and rack transmission as described in the following embodiments. Alternatively, the rack may be disposed within the groove guide.

It can be understood that the arrangement positions of the guide rail and the sliding block device can be interchanged, and the guide rail can be arranged on the movable vertical rod, and the sliding block device can be arranged on the fixed vertical rod, and also can be interchanged.

It will be understood that the guiding means are not limited to the fixed upright 22 and the mobile upright 24 having a circular section, but that other sections of the fixed upright 22 and the mobile upright 24 may be provided with guiding means to enhance the guiding action and obtain a more stable or less frictional relative movement. For non-circular cross-sectional shapes, it is also possible to use no guide rails and only linear motion means to obtain a more stable or less frictional relative movement, where the non-circular outer uprights themselves serve as guides.

The drive mechanism 26 includes a rack 260, a housing 261, a handle 262, and a gear reduction assembly. The gear reduction assembly includes a first bevel gear 263, a second bevel gear 264, a first drive gear 265 and a second drive gear 266.

The rack gear 260 is fixedly installed on the moving vertical rod 24, and the rack gear 260 is arranged along the length direction of the moving vertical rod 24. When the base 10 is placed on a horizontal surface, the fixed vertical rod 22, the movable vertical rod 24 and the rack 260 are all vertically arranged.

The housing 261 is fixedly mounted to the stationary upright 22.

The handle 262 is mounted to the housing 261, and the handle 262 is rotatable about a first axis of rotation O1.

The gear speed reduction assembly can enable the position of the movable vertical rod to move more accurately and labor-saving, and the height of the calibration target can be determined accurately. In the gear reduction assembly, the first bevel gear 263 is located within the housing 261 and is fixedly mounted to the handle 262. The rotation axis of the first bevel gear 263 coincides with the rotation axis of the handle 262, and the first bevel gear 263 and the handle 262 are rotatable together about the first rotation axis O1.

The second bevel gear 264 is mounted on the inner wall of the housing 261 to be rotatable about a second rotation axis O2. The first bevel gear 263 and the second bevel gear 264 are meshed, and the diameter of the first bevel gear 263 is smaller than that of the second bevel gear 264.

The first transmission gear 265 is fixedly attached to the second helical gear 264, the rotation axis of the first transmission gear 265 is coincident with the rotation axis of the second helical gear 264, and the first transmission gear 265 and the second helical gear 264 are rotatable together about the second rotation axis O2.

The second transmission gear 266 is mounted on the inner wall of the housing 261 to be rotatable about a third rotation axis O3. The second transmission gear 266 is engaged with the first transmission gear 265 and the rack gear 260, respectively. The second transmission gear 266 is provided with a protruding post 2662 for cooperating with a ratchet (not shown) such that the second transmission gear 266 stops at a predetermined position. The first transmission gear 265 and the second transmission gear 266 are straight gears, and the diameter of the first transmission gear 265 is smaller than that of the second transmission gear 266.

The first rotation axis O1 is perpendicular to the second and third rotation axes O2 and O3, and the first rotation axis O1 is perpendicular to the rack gear 260. The second and third rotation axes O2 and O3 are arranged in parallel, and the second and third rotation axes O2 and O3 are perpendicular to the rack gear 260.

When the handle 262 rotates around the first rotation axis O1, the first bevel gear 263 rotates around the first rotation axis O1, the second bevel gear 264 and the first transmission gear 265 rotate around the second rotation axis O2, and the second transmission gear 266 rotates around the third rotation axis O3. When the second transmission gear 266 rotates around the third rotation axis O3, it drives the rack 260 to ascend or descend along the length direction of the moving vertical rod 24, so that the moving vertical rod 24 ascends or descends relative to the fixed vertical rod 22.

In this embodiment, the first bevel gear 263 is engaged with the second bevel gear 264, the first transmission gear 265 and the second bevel gear 264 are rotatable together around the second rotation axis O2, and the second transmission gear 266 is engaged with the first transmission gear 265 and the rack gear 260, respectively, so as to drive the movable vertical rod 24 to stably move relative to the fixed vertical rod 22. In addition, the diameter of the first bevel gear 263 is smaller than that of the second bevel gear 264, and the diameter of the first transmission gear 265 is smaller than that of the second transmission gear 266, so that the moving vertical rod 24 can be driven to move relative to the fixed vertical rod 22 with a smaller force.

It will be appreciated that in some other embodiments, the first and

second bevel gears

263, 264 may be omitted, the first transmission gear 265 may be fixedly mounted to the handle 262, and the handle 262 may rotate about the second rotation axis O2 to drive the first transmission gear 265 to rotate about the second rotation axis O2.

It will be appreciated that in some other embodiments, the first bevel gear 263, the second bevel gear 264 and the first transmission gear 265 may be omitted, the second transmission gear 266 may be fixedly mounted to the handle 262, and the handle 262 may rotate about the third rotation axis O3 to drive the second transmission gear 266 to rotate about the third rotation axis O3.

Referring to fig. 19, in some embodiments, the first bevel gear 263, the second bevel gear 264, and the first transmission gear 265 may be replaced with a worm mechanism comprising a worm 263a and a worm gear 265 a.

One end of the worm 263a is fixedly mounted on the handle 262, and the rotation axis of the worm 263a coincides with the rotation axis of the handle 262, and the worm 263a and the handle 262 are rotatable together about a first rotation axis O1.

The worm 263a has a cylindrical shape, and an outer surface thereof has a tooth 264a, and the tooth 264a is engaged with the worm wheel 265 a.

The worm gear 265a is fixedly mounted to the second transmission gear 266, the rotation axis of the worm gear 265a coincides with the rotation axis of the second transmission gear 266, and the worm gear 265a and the second transmission gear 266 are rotatable together about a second rotation axis O2. The worm gear 265a has a smaller diameter than the second transmission gear 266, so that the moving upright 24 can be driven with a smaller force to move with respect to the fixed upright 22. The first axis of rotation O1 is perpendicular to the second axis of rotation O2, the second axis of rotation O2 is perpendicular to the rack gear 260.

When the moving upright 24 is moved to a desired position relative to the fixed upright 22, the moving upright 24 can be fixed to the desired position by the self-locking function of the worm mechanism.

It will be appreciated that in some other embodiments, the handle 262 may be replaced with a motor.

It will be appreciated that in some other embodiments, the drive mechanism 26 may be other than a gear box, such as a lead screw drive, a timing belt, etc., as long as it is capable of driving the moving upright 24 to move relative to the fixed upright 22.

In some embodiments, the moving upright 24 is provided with a limiting member 242, the limiting member 242 is located in the fixed upright 22, the inner wall of the fixed upright 22 is provided with a flange near the top end of the fixed upright 22, and when the moving upright 24 moves relative to the fixed upright 22 until the limiting member 242 abuts against the flange, the moving upright 24 stops moving, which can prevent the moving upright 24 from separating from the fixed upright 22. In this embodiment, the limiting member 242 is a collar, which is sleeved on the outer wall of the moving vertical rod 24.

Referring to fig. 20 to 24, in some embodiments, the driving mechanism 26c includes a transmission assembly 260b, a unidirectional rotation assembly 262b, a wrap spring 264b, a first rotation body 266b, a second rotation body 268b, and a hand wheel 269 b. The one-way rotating assembly 262b includes a fixed bracket 2620b and a rotating member 2622 b.

The fixed bracket 2620b is fixedly mounted to the fixed upright 22, the rotating member 2622b is mounted to the fixed bracket 2620b, and the rotating member 2622b is only rotatable about the predetermined axis O4 and in a first rotating direction S1 relative to the fixed bracket 2620 b.

The clasping spring 264b is sleeved on and clasps the rotating member 2622 b.

The first rotator 266b is mounted on the fixed seat 2620b, the first rotator 266b is rotatable about the predetermined axis O4 relative to the fixed seat 2620b, the first rotator 266b is configured to press the holding spring 264b, as shown in fig. 7, when the first rotator 266b presses the holding spring 264b in the first rotation direction S1, the holding spring 264b drives the rotator 2622b to rotate, as shown in fig. 8, when the first rotator 266b presses the holding spring 264b in a second rotation direction S2, the holding spring 264b releases the rotator 2622b and rotates relative to the rotator 2622b, and the second rotation direction S2 is opposite to the first rotation direction S1.

Second rotator 268b is mounted to first rotator 266b, second rotator 268b is rotatable about predetermined axis O4 relative to first rotator 266b between a first position and a second position, the second position being on the side of first rotation direction S1 with respect to first rotator 266b, second rotator 268b is configured to urge first rotator 266b to rotate, when second rotator 268b is rotated to the first position, second rotator 268b is configured to urge first rotator 266b in first rotation direction S1, when second rotator 268b is rotated to the second position, second rotator 268b is configured to urge first rotator 266b in second rotation direction S2, as shown in fig. 9, when second rotator 268b is rotated between the first position and the second position, when the second rotator 268b rotates in the second rotation direction S2, the locking spring 264b abuts against the second rotator 268 b.

The transmission assembly 260b connects the second rotation body 268b and the moving vertical rod 24, when the second rotation body 268b rotates in the first rotation direction S1, the second rotation body 268b drives the moving vertical rod 24 to ascend through the transmission assembly 260b, and when the first rotation body 266b rotates in the second rotation direction S2, the second rotation body 268b drives the moving vertical rod 24 to descend through the transmission assembly 260 b.

The hand wheel 269b is fixedly attached to the second rotation body 268b, and the hand wheel 269b and the second rotation body 268b can rotate together around the predetermined axis O4 with respect to the first rotation body 266 b.

It should be noted that, in the first aspect, the second rotator 268b located at the first position rotates in the first rotation direction S1, the second rotator 268b pushes the first rotator 266b to rotate, the first rotator 266b presses the holding spring 264b, the holding spring 264b holds the rotator 2622b, so that the second rotator 268b, the first rotator 266b, the holding spring 264b and the rotator 2622b rotate together relative to the fixed seat 2620b, and the second rotator 268b rotates in the first rotation direction S1 to lift the movable upright 24 via the transmission assembly 260 b. In the second aspect, the second rotator 268b located at the second position rotates in the second rotation direction S2, the second rotator 268b pushes the first rotator 266b to rotate, the first rotator 266b presses the clasping spring 264b, the clasping spring 264b releases the rotator 2622b, so that the second rotator 268b, the first rotator 266b and the clasping spring 264b rotate together relative to the rotator 2622b, and the second rotator 268b rotates in the second rotation direction S2 to lower the movable upright 24 via the transmission assembly 260 b. In the last aspect, when moving mast 24 has a tendency to descend, moving mast 24 pulls second rotator 268b through driving assembly 260b, causing second rotator 268b to have a tendency to rotate in second rotational direction S2, and is held against second rotator 268b by clasping spring 264b to prevent moving mast 24 from dropping. In summary, the driving mechanism 26c can drive the moving vertical rod 24 to move up and down, and can prevent the moving vertical rod 24 from dropping. The handwheel 269b may be replaced by a motor, as appropriate. By the holding spring 264b abutting against the second rotation body 268b, the beam for mounting the calibration element can be prevented from easily falling.

The drive assembly 260b includes a pull-cord 2600 b. The pulling rope 2600b may be a steel wire, one end of the pulling rope 2600b is wound around the second revolving body 268b, and the other end of the pulling rope 2600b is fixedly mounted to the movable vertical rod 24. When the second rotation body 268b rotates in the first rotation direction S1, one end of the pull rope 2600b is wound around the second rotation body 268b, and the moving vertical rod 24 is pulled to rise relative to the fixed vertical rod 22. Conversely, when the second rotation body 268b rotates in the second rotation direction S2, one end of the pull rope 2600b is unwound from the second rotation body 268b, and the movable vertical rod 24 descends relative to the fixed vertical rod 22 due to its own weight.

It is understood that the transmission assembly 260b is not limited to the form of the pull rope 2600b, and in other embodiments, the transmission assembly 260b includes a gear fixedly mounted to the second rotation body 268b and a rack fixed to the moving upright 24, the gear is engaged with the rack, and the gear and the second rotation body 268b can rotate together to drive the rack to ascend or descend. In other embodiments, the driving component 260b can also be a wire rod component, a chain wheel component, a belt pulley component, or the like, as long as the second rotation body 268b can rotate to move the moving upright 24 up or down by the driving component 260 b.

In this embodiment, the transmission assembly 260b may further include a pulley 2602 b. The pulley 2602b is mounted on the top of the fixed vertical rod 22, the pulley 2602b can rotate around its own rotation axis relative to the fixed vertical rod 22, the other end of the pulling rope 2600b is fixedly mounted on the movable vertical rod 24 via the pulley 2602b, and the pulley 2602b and the pulling rope 2600b form a fixed pulley mechanism. By providing the pulley 2602b, wear of the traction rope 2600b can be avoided, and friction between the traction rope 2600b and the stationary vertical rod 22 is reduced, thereby facilitating rotation of the second rotation body 268 b.

The one-way rotating assembly 262b is a ratchet assembly, the rotating member 2622b is a ratchet, and the ratchet is an internal-engaging ratchet, which is exemplified by the ratchet assembly further comprising a pawl (not shown) and an elastic member (not shown). The whole ratchet wheel is annular, one side in the ring of the ratchet wheel is provided with a ratchet, and the ratchet wheel is sleeved on the fixed support 2620 b. One end of the pawl is mounted on the fixed support 2620b, the pawl can swing relative to the fixed support 2620b, the other end of the pawl abuts against the ratchet teeth of the ratchet wheel, the elastic member is arranged between the pawl and the fixed support 2620b, and the elastic member is used for providing elastic force for enabling the pawl to abut against the ratchet teeth.

It is to be appreciated that the unidirectional rotation assembly 262b is not limited to a ratchet assembly, and in other embodiments, the unidirectional rotation assembly 262b can be a gear assembly, the fixed support 2620b can be a first end-toothed disc, and the rotation member 2622b can be a second end-toothed disc, wherein the gear assembly includes the first end-toothed disc, the second end-toothed disc and a compression spring, the second end-toothed disc is engaged with the first end-toothed disc via a ratchet, and the compression spring presses the first end-toothed disc toward the second end-toothed disc to keep the first end-toothed disc engaged with the second end-toothed disc, and the second end-toothed disc can rotate relative to the first end-toothed disc in only one rotational direction. In other embodiments, the unidirectional rotating assembly 262b may also be a roller brake, as long as the unidirectional rotating assembly 262b can only rotate in one rotational direction.

The clasping spring 264b includes a spiral portion 2640b and an abutment portion. The spiral portion 2640b has elasticity, the spiral portion 2640b spirals around the predetermined axis O4, and the spiral portion 2640b is sleeved on and clasps the rotating member 2622 b.

The abutting portion is connected to and protrudes from the spiral portion 2640b, and the first rotator 266b is configured to press the abutting portion. When the first rotator 266b presses the abutment portion in the first rotational direction S1, the spiral portion 2640b rotates the rotator 2622b, and when the first rotator 266b presses the abutment portion in the second rotational direction S2, the spiral portion 2640b releases the rotator 2622b and rotates with respect to the rotator 2622 b. When the second rotator 268b rotates between the first position and the second rotator 268b rotates in the second rotation direction S2, the abutment portion abuts against the second rotator 268 b. By pressing the contact portions by the first and second rotators 266, 268, the holding spring 264b can be more easily forced, such as pushing the holding spring 264b and the rotator 2622b, for example, releasing the holding spring 264b and releasing the rotator 2622b from the holding spring 264b, and then, for example, contacting the second rotator 268 b.

It is to be understood that the connection manner of the first and

second rotators

266b, 268b and the holding spring 264b is not limited to the form of pressing the contact portion, and the first and

second rotators

266b, 268b may pull the contact portion, so that the contact portion is not limited to the protruding spiral portion 2640b, or the first and

second rotators

266b, 268b may directly press the spiral portion 2640b, and the contact portion may be omitted accordingly, as long as the first and

second rotators

266b, 268b press the holding spring 264b to deform the spiral portion 2640b, and the rotating member 2622b can be released.

In particular, the abutments include a first abutment 2642b and a second abutment 2644 b. The first abutting portion 2642b and the second abutting portion 2644b are connected to and protrude from the spiral portion 2640b, and the first rotator 266b is used for pressing the first abutting portion 2642b or the second abutting portion 2644 b. When the first rotator 266b presses the first abutting portion 2642b in the first rotation direction S1, the spiral portion 2640b rotates the rotator 2622b, and when the first rotator 266b presses the second abutting portion 2644b in the second rotation direction S2, the spiral portion 2640b releases the rotator 2622b and rotates with respect to the rotator 2622 b. When the second rotator 268b rotates to between the first position and the second rotator 268b rotates in the second rotation direction S2, the first abutment 2642b abuts against the second rotator 268 b.

Since the first and

second contact portions

2642b and 2644b are two leading ends of the spiral portion 2640b, and the spiral portion 2640b is spiral in one rotational direction, the first rotary body 266b presses the first contact portion 2642b in the first rotational direction S1 or presses the second contact portion 2644b in the second rotational direction S2, which deforms the spiral portion 2640b and tends to release the rotary member 2622b or the rotary member 2622b from the spiral portion 2640 b. The spiral portion 2640b may release the rotating member 2622b or may have a tendency to release the rotating member 2622b depending on the pressure difference applied to the two fulcrums of the holding spring 264b, wherein one of the fulcrums is the first abutting portion 2642b and the second abutting portion 2644b, and the other fulcrum is the rotating member 2622b, but since the resistance between the rotating member 2622b and the fixed seat 2620b is small, the pressure required to deform the spiral portion 2640b to release the rotating member 2622b is much larger than the resistance, so that the spiral portion 2640b may be pushed to rotate together with the rotating member 2622b relative to the fixed seat 2620b in the first rotation direction S1, and the spiral portion 2640b is not easy to slip relative to the rotating member 2622 b. The first abutting portion 2642b abuts against the second rotator 268b, that is, the second rotator 268b presses the first abutting portion 2642b in the second rotation direction S2, and the helical portion 2640b deforms to further clamp the rotator 2622 b.

In the present embodiment, the second abutment 2644b is located on one side of the first abutment 2642b in the first rotational direction S1.

The first rotating body 266b includes a first rotating body 2660b and a stopper. The first rotating body 2660b is mounted to the fixed seat, and the first rotating body 2660b is rotatable about the preset axis O4 with respect to the fixed seat 2620 b. The first rotating body 2660b defines an arc notch 2662b, the arc notch 2662b has a first end and a second end, and the arc notch 2662b is used for the second rotating body 268b to pass through.

The stopping portion is disposed on a surface of the first rotating body 2660b facing the clasping spring 264 b. When the stopping portion presses the first abutting portion 2642b in the first rotating direction S1, the spiral portion 2640b drives the rotating member 2622b to rotate, and when the stopping portion presses the second abutting portion 2644b in the second rotating direction S2, the spiral portion 2640b releases the rotating member 2622b and rotates relative to the rotating member 2622 b.

Specifically, the stops include a first stop 2664b and a second stop 2666 b. The first and second stopping

portions

2664b and 2666b are disposed on a surface of the first rotating body 2660b facing the locking spring 264b, the first stopping portion 2664b is used for pressing the first abutting portion 2642b, and the second stopping portion 2666b is used for pressing the second abutting portion 2644 b. When the first stopping portion 2664b presses the first abutting portion 2642b in the first rotating direction S1, the spiral portion 2640b drives the rotating member 2622b to rotate, and when the second stopping portion 2666b presses the second abutting portion 2644b in the second rotating direction S2, the spiral portion 2640b releases the rotating member 2622b and rotates relative to the rotating member 2622 b.

In the present embodiment, the first abutting portion 2642b and the second abutting portion 2644b are both located between the first stopping portion 2664b and the second stopping portion 2666b in the first rotating direction S1, and the first abutting portion 2642b is closer to the first stopping portion 2664b and the second abutting portion 2644b is closer to the second stopping portion 2666 b.

In the present embodiment, the arc notch 2662b is located between the first stopping portion 2664b and the second stopping portion 2666b in the first rotating direction S1, and the arc notch 2662b is closer to the first stopping portion 2664 b. The first end is closer to the first stopping portion 2664b, and the second end is closer to the second stopping portion 2666 b.

The second rotation body 268b includes a second rotation body and a stopper rod 2680 b. The second swivel body is mounted to the first swivel body 266b, and the second swivel body is rotatable about the predetermined axis O4 relative to the first swivel body 266 b.

The position-limiting rod 2680b is disposed on a surface of the second rotating body facing the first rotating body 266b, the position-limiting rod 2680b passes through the arc-shaped notch 2662b, the position-limiting rod 2680b is located between the first abutting portion 2642b and the second abutting portion 2644b in the first rotating direction S1, and the position-limiting rod 2680b is used for pushing the first rotating body 266b to rotate. When the second rotating body rotates to the first position, the limiting rod 2680b is located at the first end, the limiting rod 2680b can push the first rotating body 266b towards the first rotating direction S1, when the second rotating body rotates to the second position, the limiting rod 2680b is located at the second end, the limiting rod 2680b can push the first rotating body 266b towards the second rotating direction S2, when the second rotating body rotates between the first position and the second position, and the second rotating body rotates towards the second rotating direction S2, the limiting rod 2680b is located between the first end and the second end, and the first abutting portion 2642b abuts against the limiting rod 2680 b.

It is appreciated that, depending on the actual situation, in some embodiments, the stop rod 2680b may include a first stop rod located within the arc-shaped notch 2662b and a second stop rod passing over the first rotating body 2660b and located between the first abutment 2642b and the second abutment 2644b in the first rotational direction S1, the first stop rod being located at the first end when the second rotating body rotates to the first position, the first stop rod being located at the second end when the second rotating body rotates to the second position, the first stop rod being located between the first end and the second end when the second rotating body rotates to the first position and the second position, the first stop rod abutting 2642b abutting against the second stop rod.

The second swivel body includes a rope shaft 2682b and a baffle. The rope shaft is mounted to the first rotating body 266b, the rope shaft is rotatable around the predetermined axis O4 relative to the first rotating body 266b, and one end of the pulling rope 2600b is wound around the rope shaft 2682 b.

The baffle is disposed at the end of the shaft 2682b, and the cross-sectional dimension of the baffle is larger than the cross-axial dimension of the shaft 2682 b. One end of the pull rope 2600b is restrained on the rope shaft 2682b by the baffle to prevent the pull rope 2600b from being disengaged from the rope shaft 2682 b.

Specifically, the baffles include a first baffle 2684b and a second baffle 2686 b. The first baffle 2684b is disposed at one end of the rope shaft 2682b close to the first rotator 266b, the second baffle 2686b is disposed at the other end of the rope shaft 2682b far from the first rotator 266b, and both the cross-sectional dimension of the first baffle 2684b and the cross-sectional dimension of the second baffle 2686b are larger than the cross-sectional dimension of the rope shaft 2682 b.

The hand wheel 269b is fixedly mounted on the second rotation body 268b, so that the hand wheel 269b and the second rotation body 268b can rotate together around the preset axis O4. Rotation of the second rotor 268b is facilitated by the hand wheel 269 b.

Referring to fig. 25 and 26, in some embodiments, the driving mechanism 26 is omitted, and the stand assembly 20a further includes a fastening mechanism 27 and an elastic body 28.

The fastening mechanism 27 can be mounted at one end of the fixed upright 22 for securing the moving upright 24 to the fixed upright 22. The fastening mechanism 27 includes a fastening ring 272 and a bolt 274, the fastening ring 272 is sleeved on the fixing upright 22, the fastening ring 272 can be formed by bending a metal strip, and the bolt 274 is installed at two ends of the fastening ring 272.

The elastic body 28 is located inside the fixed upright 22 and the mobile upright 24, the elastic body 28 being compressed between the bottom of the fixed upright 22 and the mobile upright 24. The elastic body 28 can be connected with the moving vertical rod 24 at a position at the bottom, top or middle of the moving vertical rod 24, as needed. When the moving upright moves to the bottom closest to the fixed upright, the elastomer is in compression. In this embodiment, the elastic body 28 is a compression spring, and it is understood that in some other embodiments, the elastic body 28 may be other elastic elements, such as a spring, a pneumatic rod, a hydraulic rod, etc.

When the movable vertical rod 24 is required to be lifted relative to the fixed vertical rod 22, the bolt 274 is rotated to loosen the fastening ring 272 from the fixed vertical rod 22, and an upward force is applied to the movable vertical rod 24, so that the movable vertical rod 24 can be lifted along the length direction of the fixed vertical rod 22, and the external force applied to the movable vertical rod 24, for example, the external force applied by an operator, can be reduced by the elastic force of the elastic body 28. When the desired position is reached, the bolts 274 are turned to tighten the fixed upright 22, so that the mobile upright 24 is fixed in the desired position. When the movable vertical rod 24 needs to be lowered relative to the fixed vertical rod 22, the bolt 274 is rotated to make the fastening ring 272 loosen the fixed vertical rod 22, and the movable vertical rod 24 can be lowered along the length direction of the fixed vertical rod 22 under the action of the gravity of the movable vertical rod 24 and the beam assembly 30, so that the lowering speed of the movable vertical rod 24 can be reduced by the elastic force of the elastic body 28, and the movable vertical rod 24 is prevented from being lowered too fast to collide with the fixed vertical rod 24, thereby causing damage.

It will be understood that in some other embodiments, the fastening mechanism 27 can be of other structures as long as it can fix the moving upright 24 at the desired position, for example, the fastening mechanism 27 can be a screw which passes through the fixed upright 22 and is in threaded engagement with the fixed upright 22, and when the moving upright 24 is moved to the desired position relative to the fixed upright 22, the screw is rotated to abut against the moving upright 24, so that the moving upright 24 is fixed at the desired position. The screw is turned so as to disengage the moving upright 24, the moving upright 24 being movable with respect to the fixed upright 22 along the length of the fixed upright 22.

It can be understood that the fixed vertical rod can be used as an inner rod and the movable vertical rod can be used as an outer rod as required, and the driving mechanism is mounted on the fixed vertical rod and used for driving the movable vertical rod to move relative to the fixed vertical rod along the length direction of the fixed vertical rod.

Referring to fig. 27 to 29, in some embodiments, the stand assembly 20c includes a fixed vertical rod 22c, a movable vertical rod 24c and a driving mechanism 26c, one end of the fixed vertical rod 22c is mounted to the base body 12, the movable vertical rod 24c is sleeved on the fixed vertical rod 22c from the other end of the fixed vertical rod 22c, and the driving mechanism 26c passes through the movable vertical rod 24c and is mounted to the fixed vertical rod 22c for driving the movable vertical rod 24c to move relative to the fixed vertical rod 22c along the length direction of the fixed vertical rod 22 c. The beam assembly 30 is mounted to the top surface of the moving upright 24 c. The moving upright 24c is provided with a guide groove 240c, and the guide groove 240c is arranged along the length direction of the moving upright 24 c.

The drive mechanism 26c includes a gear bearing 260c, a lead screw 262c, a drive gear 264c, and a handle 266 c. The handle 266c passes through the guide groove 240c and is slidable along the guide groove 240 c. One end of the handle 266c is provided with a bevel gear 268c, the bevel gear 268c is engaged with the driving gear 264c, and the bevel gear 268c can rotate around a first rotation axis A1 to drive the driving gear 264c to rotate. The driving gear 264c is sleeved on the screw rod 262c, the driving gear 264c is in threaded fit with the screw rod 262c, the driving gear 264c can rotate around a second rotation axis a2 to drive the screw rod 262c to move along the second rotation axis a2, the second rotation axis a1 is overlapped with the central axis of the screw rod 262c, and the first rotation axis a1 and the second rotation axis a2 are perpendicular to each other and intersect with each other. The top end of the screw 262c is fixed on the top of the movable vertical rod 24c, and is used for driving the movable vertical rod 24c to move relative to the fixed vertical rod 22c along the length direction of the fixed vertical rod 22 c. The gear bearing 260c is sleeved on the driving gear 264c, and the gear bearing 260c is fixed on the inner wall of the fixed vertical rod 22c, the driving gear 264c can only rotate around the second rotation axis a2 relative to the gear bearing 260c, and the driving gear 264c cannot move along the second rotation axis a2 relative to the gear bearing 260 c. The bevel gear 268c, the gear bearing 260c, the driving gear 264c and the lead screw 262c are all located inside the fixed upright 22 c.

Rotating the handle 266c causes the bevel gear 268c to rotate about the first axis of rotation a1 to drive the drive gear 268b to rotate about the second axis of rotation a2 relative to the gear bearing 260 c. The driving gear 264c is engaged with the screw rod 262c, and when the driving gear 264c rotates around the second rotation axis a2, the screw rod 262c can be driven to move along the second rotation axis a2, so as to drive the moving vertical rod 24c to move along the length direction of the fixed vertical rod 22c relative to the fixed vertical rod 22 c.

It will be appreciated that the drive mechanism may also be provided with a gear stop mechanism, e.g. a pawl-type stop or the like, so that the moving upright can be stopped in a desired position.

Referring to fig. 30, in some embodiments, one end of the first upright 22 is detachably mounted to the base 10, and the other end is connected to one end of the second upright 24 through a hinge structure or the like, so that the second upright 24 can be folded relative to the first upright 22.

The stand assembly 20 further comprises a fastener structure 23, the fastener structure 23 comprises a first fastener 232 and a second fastener 234, one end of the first vertical rod 22 is hinged to one of the first fasteners 232, one end of the second vertical rod 24 is provided with one of the second fasteners 234, the first fastener 232 and the second fastener 234 can be fastened to each other, and when the second vertical rod 24 is unfolded relative to the first vertical rod 22, the second vertical rod 24 is fastened to the first vertical rod 22.

It is understood that the positions of the third and

fourth fastening members

52 and 54 can be interchanged according to actual needs, that is, one second fastening member 234 is provided at one end of the first vertical rod 22, and one first fastening member 232 is hinged at one end of the second vertical rod 24, so long as one of the first vertical rod 22 and the first vertical rod 24 is hinged at one end to one first fastening member 232 and the other one is provided with one second fastening member 234. It will be appreciated that the buckle arrangement 23 could be replaced with other locking mechanisms, such as snaps, screws, etc., as desired.

Referring to fig. 31 and 32, in some embodiments, the number of the vertical rods can be increased according to actual needs, for example, the third vertical rod 25 and the fourth vertical rod 27 can be increased. The third upright 25 can be nested or folded with the second upright 24, and when the third upright 25 is nested with the second upright 24, the driving between the third upright 25 and the second upright 24 can adopt various driving modes as shown in fig. 18 to 19, so that the third upright 25 can move relative to the second upright 24 along the length direction of the second upright 24. Similarly, the fourth vertical rod 27 can be nested or folded with the third vertical rod 25, and when the fourth vertical rod 27 is nested with the third vertical rod 25, the driving between the fourth vertical rod 27 and the third vertical rod 25 can adopt various driving modes shown in fig. 18 to 19, so that the fourth vertical rod 27 can move relative to the third vertical rod 25 along the length direction of the third vertical rod 25.

Referring to fig. 32, how to drive the third vertical rod 25 and the fourth vertical rod 27 will be described below with the third vertical rod 25 and the second vertical rod 24 telescoped, and the fourth vertical rod 27 and the third vertical rod 25 telescoped, but it should be noted that the following description is only an example.

The driving mechanism 26d is mounted to an end of the second upright 24 adjacent to the first upright 22.

Referring to fig. 33 to 36, the second vertical rod 24 is provided with a first sliding slot 240 and a first bayonet 242, the first bayonet 242 is communicated with the first sliding slot 240, and a cross-sectional dimension of the first bayonet 242 is smaller than a cross-sectional dimension of the first sliding slot 240. The end of the third vertical rod 25 is provided with a first stopping portion 250, and the cross-sectional dimension of the first stopping portion 250 is larger than that of the third vertical rod 25. The first blocking portion 250 is sleeved in the first sliding groove 240, and the third vertical rod 25 is sleeved in the first sliding groove 240. The first stopper 250 abuts against the boundary between the first sliding groove 240 and the first bayonet 242, so that the third vertical rod 25 is prevented from being separated from the second vertical rod 24.

In this embodiment, the third vertical rod 25 is provided with a second sliding groove 252 and a second bayonet 254, the second bayonet 254 is communicated with the second sliding groove 252, and the cross-sectional dimension of the second bayonet 254 is smaller than that of the second sliding groove 252. The fourth vertical rod 27 is provided with a second stopping portion 270, and the cross-sectional dimension of the second stopping portion 270 is larger than that of the fourth vertical rod 27. The second stopping portion 270 is disposed in the second sliding groove 252, and the fourth vertical rod 27 is disposed in the second bayonet 254. The second stopper 270 abuts against the boundary between the second sliding groove 252 and the second bayonet 254, so that the fourth vertical rod 27 is prevented from being separated from the third vertical rod 25.

The drive mechanism 26d includes a first threaded rotating member 260d, a second threaded rotating member 262d, a threaded fixing member 264d, a first beveled gear 266d, a second beveled gear 268d, and a hand wheel 269 d.

The first rotating threaded member 260d is mounted to the second upright 24, and the first rotating threaded member 260d is only rotatable relative to the second upright 24 about a central axis O5, which is substantially parallel to the length of the second upright 24, O5.

The second rotating threaded member 262d has a first threaded structure (not shown) and a second threaded structure (not shown) that are threaded around the central axis O5, and the direction of the first threaded structure coincides with the direction of the second threaded structure, the second rotating threaded member 262d is mounted to the first rotating threaded member 260d through the first threaded structure, the second rotating threaded member 262d is mounted to the second fixing threaded member 264d through the second threaded structure, and the second fixing threaded member 264d is fixedly mounted to the fourth vertical rod 27.

The first threaded rotating member 260d rotates relative to the second upright 24, which in turn rotates the second threaded rotating member 262d relative to one of the first threaded rotating member 260d and the threaded fixed member 264 d. That is, in one instance, the second rotatable threaded member 262d is stationary relative to the first rotatable threaded member 260d while the first rotatable threaded member 260d is rotating relative to the second upright 24, in which case the fixed threaded member 264d is moving relative to the first rotatable threaded member 260d and the second rotatable threaded member 262d, and in another instance, the second rotatable threaded member 262d is stationary relative to the fixed threaded member 264d while the first rotatable threaded member 260d is rotating relative to the second upright 24, in which case both the second rotatable threaded member 262d and the fixed threaded member 264d are moving relative to the first rotatable threaded member 260 d. In actual use, the first threaded rotating member 260d is continuously rotated relative to the second upright 24, and the two situations may alternate. The fourth vertical rod 27 is driven to move relative to the second vertical rod 24 by the first threaded rotating part 260d, the second threaded rotating part 262d and the threaded fixing part 264d together, on one hand, in the process that the fourth vertical rod 27 moves towards the second vertical rod 24, the second threaded rotating part 262d also moves towards the second vertical rod 24, on the other hand, when the second threaded rotating part 262d is arranged in the rod piece, the stroke of the fourth vertical rod 27 cannot be limited, and the fourth vertical rod 27 cannot protrude, so that the stand assembly is more convenient to carry, on the other hand, the three parts are connected through threads, and therefore after the fourth vertical rod 27 moves to a specified position relative to the second vertical rod 24, the driving mechanism 26d can realize self-locking.

The first screw 260d includes a first neck 2600d, a first screw 2602d, and a first stopper 2604d, the first neck 2600d is disposed at one end of the first screw 2602d, the first stopper 2604d is disposed at the other end of the first screw 2602d, the cross-sectional dimension of the first neck 2600d is smaller than the cross-sectional dimension of the first screw 2602d, and the cross-sectional dimension of the first screw 2602d is smaller than the cross-sectional dimension of the first stopper 2604 d.

A mounting partition 244 is provided in the second upright 24, and the mounting partition 244 is substantially horizontal. The first neck 2600d is sleeved on the mounting partition 244, and since the first rotating screw 260d, the second rotating screw 262d and the fixing screw 264d are connected by threads, the first screw 2602d is abutted against the mounting partition 244, so that the first rotating screw 260d can only rotate around the central axis O5 relative to the second vertical rod 24. In addition, the mounting partition 244 can limit the position of the first rotating threaded member 260d, when the first rotating threaded member 260d rotates to make the second rotating threaded member 262d abut against the mounting partition 244, the first rotating threaded member 260d continues to rotate, the second rotating threaded member 262d will keep stationary with the first rotating threaded member 260d, and the fixed threaded member 264d will move toward the second vertical rod 24 until the fixed threaded member 264d also abuts against the mounting partition 244, at which time the first rotating threaded member 260d cannot continue to rotate.

In other embodiments, the second threaded rotating member 262d is disposed within the first threaded rotating member 260d and the first threaded structure is disposed outside of the second threaded rotating member 262 d.

In this embodiment, the first threaded rotating member 260d is sleeved in the second threaded rotating member 262d, and the first threaded structure is disposed in the second threaded structure 262.

The second screw thread rotation member 262d includes a second screw rod part 2620d and a second limit part 2622d, the second limit part 2622d is located the one end of the second screw rod part 2620d, the cross sectional dimension of the second screw rod part 2620d is less than the cross sectional dimension of the second limit part 2622 d. The second screw rod portion 2620d is equipped with first screw 2624d and first storage tank 2626d, and first storage tank 2626d is located the top of first screw 2624d, first screw 2624d with first storage tank 2626d is linked together, and the cross sectional dimension of first screw 2624d is less than the cross sectional dimension of first storage tank 2626d, first helicitic texture locates the pore wall of first screw 2624 d.

The first screw portion 2602d penetrates and is sleeved in the first screw hole 2624d, and the first limiting portion 2604d is accommodated in the first accommodating groove 2626 d. By providing the first stopper portion 2604d at the end of the first screw portion 2602d, during the rotation of the first rotating screw 260d, when the second rotating screw 262d moves until the first stopper portion 2604d abuts against the intersection of the first screw hole 2624d and the first receiving groove 2626d, the first rotating screw 260d continues to rotate, and the second rotating screw 262d will remain stationary with the first rotating screw 260d, so that the fixed screw 264d moves away from the second vertical rod 24.

In other embodiments, the threaded fastener 264d is disposed within the second threaded rotating member 262d, and the second threaded structure is disposed within the second threaded rotating member 262 d.

In this embodiment, the second threaded rotating member 262d is sleeved in the threaded fixing member 264d, and the second threaded structure is disposed outside the second threaded rotating member 262 d.

The threaded fastener 264d is provided with a second screw hole 2640d and a second receiving groove 2642d, the second receiving groove 2642d is located above the second screw hole 2640d, the second screw hole 2640d is communicated with the second receiving groove 2642d, the cross-sectional dimension of the second screw hole 2640d is smaller than the cross-sectional dimension of the second receiving groove 2642d, and the second threaded structure is disposed on the hole wall of the second screw hole 2640 d.

The second screw portion 2620d penetrates through and is sleeved in the second screw hole 2640d, and the second limiting portion 2622d is accommodated in the second accommodating groove 2642 d. By providing the second position-limiting portion 2622d at the end of the second screw portion 2620d, when the second rotating threaded member 262d moves to the position where the second position-limiting portion 2622d abuts on the boundary between the second screw hole 2640d and the second receiving groove 2642d during the rotation of the first rotating threaded member 260d, the first rotating threaded member 260d continues to rotate, and the second rotating threaded member 262d will remain stationary with the fixed threaded member 264d, so that the second rotating threaded member 262d and the fixed threaded member 264d move together away from the second vertical rod 24.

One end of the first journal portion 2600d is connected to the first screw portion 2602d, the first bevel gear 266d is fixedly mounted to the other end of the first journal portion 2600d, a rotation axis of the first bevel gear 266d coincides with the central axis O5, and the first bevel gear 266d and the first screw portion 2602d are rotatable together.

The second beveled gear 268d is mounted to the second upright 24 such that the second beveled gear 268d is rotatable about its axis of rotation relative to the second upright 24, the axis of rotation of the second beveled gear 268d being perpendicular to the central axis O5.

The hand wheel 269d is fixedly installed on the second bevel gear 268d, the hand wheel 269d and the second bevel gear 268d can rotate together, and the first threaded rotating member 260d can be driven to rotate by the hand wheel 269 d.

Referring to fig. 37, 38 and 39, the beam assembly 30 includes a first supporting rod 31, the left beam portion 32, a second supporting rod 33, the right beam portion 34, a mounting seat 35, the connecting portion 36, an adjusting mechanism 37 and a joint mechanism 39. The purpose of the first and

second support rods

31, 33 is to lift the target against falling, especially when the target is large in area and heavy.

One end of the first bar 31 may be pivotably connected to the left beam portion 32 by a hinge mechanism, or the like, and the first bar 31 may rotate relative to the left beam portion 32 to be unfolded to be perpendicular to the left beam portion 32, or may be engaged with the left beam portion 32 and be parallel to the left beam portion 32.

The first supporting rod 31 comprises a first supporting rod body 310 and a first supporting piece 312, one end of the first supporting rod body 310 is hinged to the left cross beam portion 32, the other end of the first supporting rod body 310 is provided with the first supporting piece 312, the first supporting piece 312 is approximately cylindrical and perpendicular to the first supporting rod body 310, an annular first positioning mechanism 3120 is arranged on the outer wall of the first supporting piece 312, and the first positioning mechanism 3120 can be a positioning structure such as a clamping groove and a bump. The side wall of the first supporting rod body 310 is provided with a first clamping groove (not shown).

Similarly, one end of the second lever 33 may be hinged to the right beam portion 34 by a hinge mechanism, or the like, and the second lever 33 may rotate relative to the right beam portion 34 to be unfolded to be perpendicular to the right beam portion 34, and may be engaged with the right beam portion 34 and be parallel to the right beam portion 34. The second supporting rod 33 comprises a second supporting rod body 330 and a second supporting piece 332, one end of the second supporting rod body 330 is hinged to the right cross beam part 34, the other end of the second supporting rod body 330 is provided with the second supporting piece 332, the second supporting piece 332 is approximately cylindrical and perpendicular to the second supporting rod body 330, an annular second positioning mechanism 3320 is arranged on the outer wall of the second supporting piece 332, the second positioning mechanism 3320 can be a positioning structure such as a clamping groove and a convex block, and the first positioning mechanism 3120 and the second positioning mechanism 3320 are located on the same plane. The side wall of the second supporting rod body 330 is provided with a second clamping groove 3300. The first bracket 312 and the second bracket 332 extend in the same direction, and when the first supporting rod 31 is unfolded to be perpendicular to the left beam portion 32 and the second supporting rod 33 is unfolded to be perpendicular to the right beam portion 34, the first engaging groove 3300 is disposed in a back-to-back manner, and the first bracket 312 and the second bracket 332 can be used to support an alignment element such as a large alignment board (usually, a large pattern board).

The left beam portion 32 is provided with a first latch 320 and a first rail 322. First fixture block 320 and first die-pin 31 all connect in the same one side of left crossbeam portion 32, work as when first die-pin 31 rotates to and is parallel with left crossbeam portion 32, first fixture block 320 card is gone into first draw-in groove, will first die-pin 31 joint in left crossbeam portion 32. The first guide rail 322 is disposed on the other side of the left beam portion 32, the first guide rail 322 is disposed parallel to the left beam portion 32, the first guide rail 322 is used for mounting a pendant to mount a calibration element, such as a calibration target, a reflective mirror, a laser, etc., and the pendant can slide along the first guide rail 322.

Similarly, the right beam portion 34 is provided with a second latch 340 and a second rail 342. The second fixture block 340 and the second support rod 33 are both connected to the same side of the right beam portion 34, and when the second support rod 33 rotates to be parallel to the right beam portion 34, the second fixture block 340 is clamped into the second clamping groove 3300, so that the second support rod 33 is clamped to the right beam portion 34. The second rail 342 is disposed on the other side of the right beam portion 34, the second rail 342 is disposed parallel to the right beam portion 34, the second rail 342 is used for mounting a pendant to mount a calibration element, such as a mirror, and the pendant can slide along the second rail 342. The first and

second guide rails

322 and 342 are symmetrically disposed with respect to the connecting portion 36, and the left and

right beam portions

32 and 34 are also symmetrically disposed with respect to the connecting portion 36. When the base 10 is placed on a horizontal plane, the first guide rail 322, the second guide rail 342, the left beam portion 32 and the right beam portion 34 are all horizontally arranged, and the first positioning mechanism 3120 and the second positioning mechanism 3320 are located on the same vertical plane and used for clamping the bottom end of the target plate together.

It is understood that in some other embodiments, the positions of the first latch 320 and the first slot can be interchanged, that is, the first latch 320 is installed on the first bracket rod body 310, and the first slot is installed on the left beam portion 32; similarly, the positions of the second latch 340 and the second latch 3300 can be interchanged, that is, the second latch 340 is installed on the second bracket rod body 330, and the second latch 3300 is installed on the right beam portion 34. Optionally, the first engaging groove and the second engaging groove 3300 are concavely disposed on the corresponding beam portion.

It will be appreciated that in some other embodiments, the first rail 322 and the second rail 342 may be disposed on other faces of the beam, such as a top face. In some other embodiments, the first guide rail 322 and the second guide rail 342 need not be provided, and the calibration element may be directly hung on the cross beam using a hook or the like. The first rail 322 and the second rail 342 may have other shapes, not limited to the shape shown in the figures, for example, they may be one or several groove lines disposed on the top surface of the beam, and the groove lines may be formed by using the outer wall of the beam itself without installing additional rails.

It is understood that the number of the supporting rods is not limited to the above-described embodiments. For example, only one of the support rods may be provided substantially centrally of the connecting portion 36, which may also be desirable to lift a target located substantially in the middle of the beam assembly 30. When the target for calibration is located at other positions, the supporting rod can be arranged at the corresponding position for lifting. The number of the supporting rods can be more than two. In addition, the carrier bars may be provided on carrier bar guides (not shown) provided on the sides or bottom of the beam assembly 30 so that the carrier bars may be moved along the assembled beam assembly 30 to lift targets at the appropriate locations, which may be in different positions.

It can be understood that when the guide rail is used to move the support rod, the support rod can be clamped on the cross beam assembly 30 in a clamping block or clamping groove manner. The support 3303 (see fig. 39) for positioning can likewise remain on the guide rail.

The connecting portion 36 of the cross beam is sleeved in the mounting seat 35, the first surface 360 of the connecting portion 36 is concavely provided with two limiting holes 3604, and the number of the limiting holes 3604 is preferably two, and the two limiting holes 3604 are arranged along the length direction of the connecting portion 36. Correspondingly, a limiting mechanism, such as a limiting column 3524 (see fig. 41), is disposed at a corresponding position of the mounting seat 35 and is matched with the limiting hole 3604. In addition, the connecting portion 36 and the mounting seat 35 may also be provided with other types of limiting mechanisms, for example, a limiting slot 3564 is provided on the mounting seat 35, and a limiting mechanism (not shown in the drawings) adapted to the connecting portion 36 is provided at a corresponding position of the connecting portion 36, so as to more conveniently and accurately place the connecting portion 36 of the cross beam at a predetermined position of the mounting seat 35.

Referring to fig. 40, the connecting portion 36 is provided with a fixing groove 3620, a fixing surface 3624 is provided in the fixing groove 3620, and the fixing groove 3620 is used in cooperation with the fixing rod 354 shown in fig. 18 to fix the beam assembly on the mounting seat 35. Alternatively, securing slots 3620 are provided so that securing surface 3624 is at an angle to the bottom surface of mount 35. the advantages of this arrangement are explained in connection with securing rods 354 in FIG. 17. For example, the securing slot 3620 may be disposed between the second surface 362 and the top surface of the beam, wherein the second surface 362 is disposed parallel to the first surface 360, and the securing surface 3624 is disposed at an angle to the first surface 360 and the second surface 362, for example, the securing surface 3624 is disposed at 45 degrees to the first surface 360 and the second surface 362.

In this embodiment, the left beam portion 32, the right beam portion 34 and the connecting portion 36 are square tubes, so that the weight of the calibration bracket 100 can be reduced, and the connecting portion 36 can be easily and firmly sleeved in the adjusting mechanism 38. It will be appreciated that in some other embodiments, the left and

right beam portions

32, 34 and the connecting portion 36 may be other shapes of tubing, profiles or rods, etc., for example, polygonal or circular tubing or rods. When the beam is made of a tube having another shape, the fixing grooves 3620 may be disposed at a position where the fixing surface 3624 forms an angle with the bottom surface of the mounting seat 35.

Referring to fig. 41 and 42, the mounting seat 35 is used for sleeving the connecting portion 36. The mount 35 includes a retainer 352, a fixing rod 354 and a mounting housing 356.

Alternatively, the mounting seat 35 may be disposed on the adjusting mechanism 37, such that the mounting seat 35 can rotate around the adjusting rotation axis L relative to the stand assembly 20 under the adjustment of the adjusting mechanism 37, so as to adjust the horizontal angle of the mounting seat 35 and the cross beam assembly 30. Preferably, the adjusting mechanism 37 is disposed in a vertical relation to the mounting seat, so as to facilitate the horizontal angle adjustment and the convenient detachment and installation of the cross beam from above. The adjustment rotation axis L is arranged parallel to the fixed upright 22 and the movable upright 24, i.e. when the calibration frame 100 is placed on a horizontal plane, the adjustment rotation axis L is arranged vertically. The mounting seat 35 is provided with a notch 350 for facilitating the placement of the connecting portion 36 into the mounting seat 35 or the removal of the connecting portion 36 from the mounting seat 35.

The retainer 352 is generally hook-shaped to facilitate retaining the connecting portion 36. The retainer 352 has one end fixedly connected to the mounting housing 356, such as mounted on the upper surface or side of the mounting housing 356, and another end surrounding and holding the connecting portion 36 of the beam assembly 20, leaving the gap 350. For example, the holder 352 may have a shape as shown in fig. 18, but may have other shapes, such as a circular ring-shaped hook, a hook of another polygon, and a hook formed by combining a circular ring and a polygon, as long as stable holding of the connecting portion 36 is achieved. The term "substantially hook-shaped" as used herein means that the holder 352 can extend from a certain angle to a certain length, so as to support and hold the connecting portion 36.

The retainer 352 and the mounting housing 356 enclose a mounting channel for receiving the connecting portion 36. The mounting channel communicates with the notch 350. The inner surface of the retainer 352 is provided with two position-limiting posts 3524, and the two position-limiting posts 3524 are located in the installation channel and are used for being inserted into the two position-limiting holes 3604 (see fig. 37) so as to conveniently position the connecting portion 36 in the installation channel. The stop holes 3604 serve to further reduce any displacement of the beam assembly 20 in the horizontal direction relative to the mount 35 during calibration. The retaining posts 3524 may also be provided on the upper surface of the mounting shell 356, or on both the upper surface of the mounting shell 356 and the inner surface of the retainer 352. The limiting columns comprise round, square and strip-shaped limiting columns, and the limiting holes comprise round, square and strip-shaped limiting holes. When the position-limiting posts and the position-limiting holes are substantially in a dot shape, at least two position-limiting posts 3524 are preferably disposed along the length direction of the connecting portion 36 to ensure that the connecting portion 36 does not displace along the length direction. When the limiting posts and the limiting holes are substantially in the shape of long strips, only one pair of limiting posts and limiting holes can be used. It is understood that in some other embodiments, the positions of the retaining hole 3604 and the retaining post 3524 may be interchanged, that is, the retaining hole 3604 is opened in the retainer 352 and communicates with the mounting channel, and the retaining post 3524 is disposed on the first surface 360 (see fig. 39).

Optionally, the fixing rod 354 is disposed on the holder 352, and includes a knob and at least one section of screw, and is matched with the thread of the holder 352, when the connecting portion 36 is sleeved on the mounting seat 35, the central axis of the fixing rod 354 is perpendicular to the fixing surface 3624 at the beam connecting portion 36, and when the fixing rod 354 is rotated, the fixing rod 354 can abut against the fixing surface 3624, so that the connecting portion 36 of the beam assembly 30 is fixed on the mounting seat 35, or alternatively, the fixing rod 354 can be disengaged from the fixing surface 3624 by rotating the fixing rod 354, so that the connecting portion 36 can be removed from the mounting seat 35 through the gap 350.

Optionally, the fixing surface 3624 is at an angle with the bottom surface (i.e. horizontal surface) of the mounting seat 35, and the fixing rod 354 is at an angle with the bottom surface of the mounting seat 35, the angle being greater than 0 degree and smaller than 90 degrees. Optionally, the angle is substantially 45 degrees. In this arrangement, only one fixing rod 354 can be used to apply a pressing force to the connecting portion 36 toward the bottom surface and one side surface of the mounting seat, which is the side surface opposite to the extending direction of the fixing rod 354 itself, so that the fixing seat can fix the connecting portion 36 with high stability, and the beam assembly can be conveniently disassembled and assembled.

It will be appreciated that the mounting block 35 may have other configurations, for example, a notch may not be maintained, and the notch may be blocked by a baffle or the like after the connecting portion 36 is placed in the mounting block 35. The connecting portion 36 may be installed in other manners, for example, the installation seat 35 may be a complete ring structure without a gap for placing the beam, and at this time, the beam may be assembled, and then the installation seat 35 is inserted, and then the beam is screwed and fixed by the fixing rod 354.

It will be appreciated that the bottom or side of the mounting seat 35 against which the connecting portion 36 is pressed may be rounded or otherwise irregular, and that the fixing rod 354 may also be used to press the connecting portion 36 against these surfaces, and that the fixing rod may be in line contact with the surfaces rather than in surface contact with the surfaces, but the pressing effect is not affected.

Optionally, when the mounting base 35 includes the notch 350, the surface of the mounting base 35 facing away from the notch 350 may also be used for mounting a calibration element, such as a multi-line laser 200 (see fig. 1 and 5) or the like, and the multi-line laser 200 and the recess 122 on the base 12 are located on the same side of the surface of the mounting base 35 facing away from the notch 350.

The mounting housing 356 is generally cubic with an opening in one side. The adjustment mechanism 37 is disposed within an opening of the mounting housing 356. The mounting shell 356 is provided with a threaded hole 3562, and a mounting post 3560 is arranged in the mounting shell 356. The adjusting mechanism 37 includes a supporting shaft 371, a first elastic member 372, a rotating member 373, a bearing seat 374, a base 375 and an adjusting lever 376. The adjustment mechanism 37 is used to adjust the angle of the cross-beam assembly 20 in the horizontal direction (i.e., yaw angle).

The support shaft 371 is accommodated in the mounting case 356 and is fixedly mounted to an inner wall of the mounting case 356. The center axis of the support shaft 371 coincides with the adjustment rotation axis L.

One end of the first elastic member 372 is fixed to the mounting post 3560, and the other end of the first elastic member 372 is fixed to the rotating member 373. In this embodiment, the first elastic member 372 is a tension spring.

The rotating member 373 is substantially a cube, and one end of the rotating member 373 is provided with a protrusion 3732, and the protrusion 3732 and the first resilient member 372 are respectively located on two opposite sides of the rotating member 373. The rotating member 373 is sleeved on the bearing seat 374.

The bearing seat 374 is fixedly mounted on a surface of the base 375, and a central axis of the bearing seat 374 coincides with the adjustment rotation axis L. The rotating member 373 is fixedly mounted on the base 375 and sleeved on the bearing seat 374. One end of the support shaft 371 is inserted into the bearing seat 374 so that the support shaft 371 and the mounting case 356 are rotatable together about the adjustment rotation axis L relative to the rotating member 373, the bearing seat 374 and the base 375.

The base 375 is used to be installed on the moving upright 24, and the moving upright 24 can drive the base 375 to ascend or descend. In this embodiment, the base 375 is a cube, and the base 375 covers the opening of the mounting housing 356. The supporting shaft 371, the first elastic element 372 and the rotating element 373 are all accommodated in a cavity formed by the surrounding of the mounting housing 356 and the base 375.

The "cube" described in the present specification includes a case of a thin plate.

The adjusting rod 376 is installed in the threaded hole 3562, and the adjusting rod 376 is rotated so that the adjusting rod 376 abuts against the protrusion 3732, the mounting seat 35 is pushed to rotate around the adjusting rotation axis L relative to the rotating member 373 and the base 375, so that the horizontal angle of the mounting seat 35 and the connecting portion 36 is adjusted, and the first elastic member 372 is stretched. By rotating the adjusting lever 376 in the opposite rotational direction, the mounting seat 35 is pulled by the first elastic member 372 to be rotationally reset about the adjusting rotational axis L with respect to the rotating member 373 and the base 375.

It will be appreciated that in some other embodiments, the base 375 may be omitted and the rotary member 373 and bearing seat 374 may be fixedly mounted directly at the top surface of the moving upright 24.

It will be appreciated that the adjustment mechanism 37 described above may alternatively be used. When the adjustment mechanism 37 is removed, the mounting housing 356 of the mounting block 35 can be removed and the retainer 352 mounted at the top surface of the moving upright 24 or other additional mounting surface. It should be understood that the retainer 352 may also extend to form a bottom surface and surround the lower surface of the connecting portion 36 of the cross-beam assembly 30, i.e., the retainer 352 may have a bottom surface that is mounted on the mounting housing 356.

It will be appreciated that other securing mechanisms may be used to simultaneously compress the connecting portion 36 against the bottom and one side of the mounting block 35. For example, in some embodiments, a cam handle 354a as shown in fig. 43 may be used, the cam handle 354a mounted to the retainer 352, and the cam handle 354a may be rotated relative to the retainer 352 to urge the cam handle 354a against the fixed surface 3624 such that the cam handle 354a compresses the connecting portion 36 against the bottom surface and one side surface of the mount 35, or to disengage the cam handle 354a from the fixed surface 3624 such that the connecting portion 36 may be removed from the mount 35.

Referring to fig. 44, the cam handle 354a includes a cam portion 3542a and a handle portion 3544a, the handle portion 3544a being connected to an end of the cam portion 3542 a. The cam portion 3542a is formed with a shaft hole 3540a, a rotation shaft passes through the shaft hole 3540a, and both ends of the rotation shaft are fixed to the holder 352, so that the cam handle 354 can rotate around the rotation shaft. The cam portion 3542a is a disk-shaped cam, which is a disk-shaped member rotating around a rotating shaft and having a variable diameter, and can rotate around the rotating shaft in a first rotating direction to abut against the fixed surface 3624, and can also rotate around the rotating shaft in a second rotating direction to separate from the fixed surface 3624, wherein the first rotating direction is opposite to the second rotating direction.

Referring to fig. 45 and 46 together, in some embodiments, the adjustment mechanism 37a includes an adjustment worm 370a and an adjustment worm wheel 372 a. The adjustment worm 370a passes through the base 375, the adjustment worm 370a is mounted to the base 375 and is rotatable about a central axis thereof relative to the base 375, and the adjustment worm 370a includes a worm thread 374 a. The adjustment worm wheel 372a is fixed to the mounting housing 356 and is located in a cavity formed by the mounting housing 356 and the base 375, the adjustment worm wheel 372a includes worm gear teeth 376a, and the worm gear teeth 376a are engaged with the worm threads 374 a. When the fixed vertical rod 22 and the movable vertical rod 24 are both vertically arranged, the adjusting worm 370a is horizontally arranged, and the rotation center line of the adjusting worm wheel 372a is vertically arranged.

Turning the adjustment worm 370a, the worm thread 374a drives the worm gear tooth 376a to rotate, so that the adjustment worm wheel 372a rotates around the rotation center line thereof to rotate the mounting shell 356 of the mounting seat 35, thereby adjusting the horizontal angle of the cross beam assembly 30.

It will be appreciated that in some other embodiments, the positions of the adjustment worm 370a and the adjustment worm wheel 372a may be reversed, i.e., the adjustment worm wheel 372a may be secured to the base 375 and the adjustment worm 370a passes through the mounting housing 356.

Referring to fig. 38 again, the number of the joint mechanisms 39 is two, one of the joint mechanisms 39 is connected between the left beam portion 32 and the connecting portion 36, and the other joint mechanism 39 is connected between the right beam portion 34 and the connecting portion 36. In some embodiments, the articulation mechanism 39 is fixed within the wall tubes of the left beam portion 32, the right beam portion 34, and the connecting portion 36. In some embodiments, the joint mechanism 39 is fixed outside the wall pipes of the left beam portion 32, the right beam portion 34 and the connecting portion 36, and is connected to the cross sections of the wall pipes of the left beam portion 32, the right beam portion 34 and the connecting portion 36 by means of clamping, screwing, bonding, and the like.

Referring also to fig. 47, 48 and 49, a first embodiment of the construction of the articulating mechanism 39 is shown. The joint mechanism 39 includes a first fixing member 391, a second fixing member 396, a first rotating shaft 397, a buckle 392, a second rotating shaft 393, a second elastic member 394 and a tightening mechanism 395.

The first fixing member 391 and the second fixing member 396 are hingedly connected together by a first rotating shaft 397. The first fixing member 391 is substantially cubic, and one end thereof is hinged to one end of the second fixing member 396. The first fixing member 391 is provided with a first through hole 3910.

The locking member 392 is received in the first through hole 3910, the second rotating shaft 393 passes through the middle of the locking member 392, and two ends of the second rotating shaft 393 are respectively mounted on the side wall of the first fixing member 391. The locking member 392 can rotate around the second rotating shaft 393, one end of the locking member 392 extends to form a hook 3922, one end of the second elastic member 394 abuts against the other end of the locking member 392, and the other end of the second elastic member 394 abuts against the inner wall of the first fixing member 391. The second elastic member 394 is a compression spring, and is configured to restore elastic deformation so as to push the latch 392 to rotate around the second rotating shaft 393.

The tightening mechanism 395 includes a knob and at least one section of screw, one end of the tightening mechanism 395 passes through the first fixing member 391 from the outside of the first fixing member 391 to abut against the buckle 392, the tightening mechanism 395 and the second elastic member 394 are located on the same side of the central axis of the second rotating shaft 393, and the hook 3922 is located on the other side of the central axis of the second rotating shaft 393.

The second fixed member 396 is also generally cubic and defines a second through-hole 3960. The inner wall of the second through hole 3960 is provided with a snap projection 3962. The first fixing member 391 is fixed inside the connecting portion 36, and the second fixing member 396 is fixed inside the left beam portion 32 or the right beam portion 34 so that the left beam portion 32 or the right beam portion 34 can be engaged with the connecting portion 36.

When the first fixing member 391 and the second fixing member 396 are closed, the first fixing member 391 contacts the second fixing member 396, the first through hole 3910 is communicated with the second through hole 3960, the hook portion 3922 is buckled on the clamping protrusion 3962 under the pushing of the second elastic member 394, the tightening mechanism 395 is rotated, so that the tightening mechanism 395 compresses the clamping protrusion 392, the hook portion 3922 is further locked on the clamping protrusion 3962, and the left beam portion 32 or the right beam portion 34 is stably in an unfolded state relative to the connecting portion 36.

The tightening mechanism 395 is rotated to disengage from the latch 392, such that the first fixing member 391 rotates relative to the second fixing member 396 to disengage the hook 3922 from the protrusion 3962, and the first fixing member 391 is separated from the second fixing member 396, such that the left beam portion 32 or the right beam portion 34 can rotate relative to the connecting portion 36, such that the beam assembly 30 is folded.

In this embodiment, by pushing the second elastic member 394, the hook portion 3922 may be conveniently buckled to the protrusion 3962, so that the hook portion 3922 is buckled with the protrusion 3962 in advance, and then the tightening mechanism 395 compresses the buckle 392, so that the hook portion 3922 is further locked to the protrusion 3962.

It is understood that the tightening mechanism 395 can be pressed against other portions of the locking buckle 392 to further lock the hook 3922 to the locking protrusion 3962, so long as the possibility of the lever pivoted on the second rotating shaft 393 is lost. For example, referring to fig. 26, the tightening mechanism 395 can abut against the hook 3922 from the lower portion of the hook 3922, and at this time, the hook 3922 can be lengthened appropriately so that the tightening mechanism 395 capable of abutting against the hook 3922 can be disposed at the lower portion of the second fixing member 396.

It will be appreciated that in some other embodiments, the positions of the first fixing member 391 and the second fixing member 396 can be interchanged, that is, the first fixing member 391 is fixed inside the left beam portion 32 or the right beam portion 34, and the second fixing member 396 is fixed inside the connecting portion 36.

It is understood that the first fixing member 391 and the second fixing member 396 may be integrally formed with the inner wall of the left beam portion 32, the right beam portion 34 or the connecting portion 36, that is, the first fixing member 391 and the second fixing member 396 may be a part of the inner wall of the left beam portion 32, the right beam portion 34 or the connecting portion 36. The first fixing member 391 and the second fixing member 396, and the first fixing member 391 and the second fixing member 396 may not be connected together through the first rotating shaft, but they are not connected, but the left beam portion 32 or the right beam portion 34 and the outer wall of the connecting portion 36 are connected together through an additional rotating shaft, which also enables the pivotable connection between the left beam portion 32 or the right beam portion 34 and the connecting portion 36.

It is understood that the relative positions of the second resilient member 394 and the tightening mechanism 395 and the second shaft 393 may be varied, i.e., the second resilient member 394 may be closer to the second shaft 393 than the tightening mechanism 395, so long as the catch 392 locks the protrusion 3962.

Referring to fig. 50 and 51 together, a second embodiment of the construction of the joint mechanism 39a is shown. The joint mechanism 39a provided in this second embodiment is substantially the same as the joint mechanism 39 in the previous embodiment, except that one end of the fastener 392a is provided with a hook 3922a and a bump 3924a, two hooks 3922a are located on opposite sides of the bump 3924a, the inner wall of the second through hole 3960 is provided with two locking protrusions 3962a, and the position of each locking protrusion 3962a corresponds to the position of a corresponding hook 3922 a. The knob 395 is replaced with a button 395a, and the button 395a is mounted to the second fixing member 396. The second elastic element 394 is a compression spring compressed between the first fixing element 391 and the locking element 392 a.

When the first fixing member 391 and the second fixing member 396 are closed, the first fixing member 391 contacts the second fixing member 396, the first through hole 3910 is communicated with the second through hole 3960, the second elastic member 394 abuts against the fastener 392a, so that the two hook portions 3922a are fastened to the two locking protrusions 3962a, respectively, and the first fixing member 391 and the second fixing member 396 are fastened to each other, so that the left beam portion 32 or the right beam portion 34 is unfolded relative to the connecting portion 36.

When the button 395a is pressed, the button 395a pushes the bump 3924a to push the latch 392a to rotate around the second rotating shaft 393, the hook 3922a disengages from the catch 3962a, the second elastic element 394 is further compressed, and at this time, the first fixing element 391 can rotate relative to the second fixing element 396, so that the first fixing element 391 is separated from the second fixing element 396, and the left beam 32 or the right beam 34 can rotate relative to the connecting part 36, so that the beam assembly 30 can be folded. The button 395a is lifted to make the button 395a away from the latch 392a, and the second elastic member 394 restores the elastic deformation to push the latch 392a to rotate around the second rotating shaft 393, so that the hook 3922a is fastened to the latch 3962 a.

It will be appreciated that when the clasp, latch, etc. of fig. 45-49 are made of a somewhat resilient, rigid material, the resilient restoring force provided by the spring may be eliminated, and the joint structure shown in fig. 24-28 may be similarly constructed by adjusting the design: utilize the protruding slight deformation of buckle spare, card to realize the block between first mounting and the second mounting, recycle the stereoplasm of the protruding material of buckle spare, card itself and realize that the block can not loosen and take off, recycle buckle spare, card protruding still can take place to deform under great exogenic action and realize the pine between first mounting and the second mounting and take off. Furthermore, the screwing mechanism, the button, etc. can be designed similarly.

Referring to fig. 52, in order to increase the engaging force of the left beam portion 32 and the right beam portion 34 with the connecting portion 36, so that the left beam portion 32 and the right beam portion 34 can carry calibration elements with larger weight, the beams of the calibration bracket 100 may further be provided with locking mechanisms 50, for example, snap structures 50, one of the snap structures 50 is connected between the left beam portion 32 and the connecting portion 36, and the other of the snap structures 50 is connected between the right beam portion 34 and the connecting portion 36.

Each of the fastener structures 50 includes a third fastener member 52 and a fourth fastener member 54. The connecting portion 36 is provided with a third fastener 52, one end of the third fastener 52 is hinged to the connecting portion 36, one end of the third fastener 52 hinged to the connecting portion 36 is provided with a pulling portion 522, the other end of the third fastener 52 is provided with a hook pull rod 524, the left beam portion 32 or the right beam portion 34 is provided with a fourth fastener 54, and the fourth fastener 54 is provided with a fastener portion 544. The hinge joint of the left or

right beam portion

32 or 34 and the connecting portion 36 is located at one side of the connecting portion 36, and the third and

fourth fastening members

52 and 54 are located at the other side of the connecting portion 36. When the left and

right beam portions

32 and 34 are unfolded with respect to the connecting portion 36, the left and

right beam portions

32 and 34 are respectively in contact with the connecting portion 36, and the hook lever 524 is fastened to the buckle portion 544. When the pulling portion 522 is pulled, the hook rod 524 is separated from the snap portion 544, and the third and

fourth snap members

52 and 54 may be separated, so that the left or

right beam portion

32 or 34 may be folded with respect to the connecting portion 36.

It is understood that in some other embodiments, the positions of the third and

fourth fastening members

52 and 54 may be interchanged, that is, the third fastening member 52 is disposed on the left or

right beam portion

32 or 34, and the fourth fastening member 54 is disposed on the connecting portion 36. In some embodiments, the third and

fourth fasteners

52, 54 may be used in conjunction with the articulation mechanism 39, i.e., with the articulation mechanism 39 being located within the inner walls of the left and

right beam portions

32, 34 and the connecting portion 36. In some embodiments, the third and

fourth fastening members

52 and 54 can also be used independently, that is, there is no joint mechanism 39 in the inner walls of the left and

right beam portions

32 and 34 and the connecting portion 36, and a hinge is added at the position where the connection between the left and

right beam portions

32 and 34 and the connecting portion 36 is needed.

It will be appreciated that the use of a locking mechanism such as the snap 50 in conjunction with the articulation mechanism 39 is advantageous in that the snap 50 may provide a temporary fastening between the cross member. Since the cross beams of the calibration stand 100 are generally longer, the left and right

cross beam portions

32, 34 are generally designed to be longer and therefore they are heavier. It is inconvenient for an operator to lift the left or

right beam portion

32, 34 and operate the locking mechanism 50 between it and the connecting portion 36. The presence of the fastener 50 solves this problem, and the operator does not need to lift the left beam portion 32 or the right beam portion 34, and then locks each part of the beam by operating the locking mechanism, so that the two ends of the beam can bear heavier calibration elements.

It is to be understood that the embodiments provided herein are not the only implementation for achieving temporary snap-fit. For example, when the snap member or the snap protrusion itself in the joint mechanism is made of a hard material with certain elasticity, the structure of the spring, the rotating shaft, and the like described in the embodiments is not needed, and the temporary engagement can be realized. At the moment, the knob can be used for tightly pushing the buckling piece and the clamping protrusion to prevent the buckling piece and the clamping protrusion from falling off, and the button can be used for realizing quick separation between the buckling piece and the clamping protrusion.

It will be appreciated that other locking mechanisms may also be used. For example, as shown in figures 53 and 54 for locking mechanism 395b, the locking mechanism 395b includes a mounting bracket 3950b, a locking cam handle 3952b, a top post 3954b and a third resilient member 3956 b. The mounting support 3950b is mounted to the first fixing member 391, the locking cam handle 3952b is mounted to the mounting support 3950b, and the locking cam handle 3952b is rotatable relative to the mounting support 3950b to drive the post 3954b against the catch 392 such that the first fixing member 391 and the second fixing member 396 are fastened. The locking cam handle 3952b is identical to the cam handle 354a shown in fig. 20 and 21, and the structure of the locking cam handle 3952b will not be described in detail. The top post 3954b passes through the first fixing member 391, and has one end for abutting against the locking cam handle 3952b and the other end for abutting against the catch 392 b. The third elastic member 3956b is a compression spring, and is sleeved on the top pillar 3954b, one end of the third elastic member 3956b is fixed on the top pillar 3954b, and the other end of the third elastic member 3956b abuts against the fastener 392.

The locking cam handle 3952b is rotated to push the post 3954b against the catch 392, so that the first anchor 391 and the second anchor 396 are fastened, and the third resilient member 3956b is compressed. When the locking cam handle 3952b is rotated in the opposite direction, the third resilient member 3956b pushes the top post 3954b upward to disengage the catch 392, and the first fixing member 391 and the second fixing member 396 can be separated.

It is understood that in some embodiments, the button 395a of figures 48 and 49 may be replaced with a locking mechanism 395 b.

In this embodiment, the beam assembly 30 is mounted to the top surface of the moving upright 24, which allows the center of gravity of the beam assembly 30 to be closer to the center of gravity of the upright assembly 20 than in a conventional calibration stand, which increases the stability of the calibration stand and allows the use of a smaller footprint of the base body 12. It will be appreciated that in some other embodiments, the beam assembly 30 may be mounted to the stand assembly 20 at different locations according to different requirements, such that the beam assembly 30 is at a suitable height for carrying calibration elements having a relatively low weight, such as radar absorbing/reflecting plates, reflectors, etc.

Referring to fig. 55 and 56 together, another embodiment of the present invention further provides a calibration system 600, which includes a calibration element and the calibration bracket 100 provided in the above embodiment, the calibration element can be mounted on the calibration bracket 100, for example, the calibration element is a reflective mirror 300 and a distance measuring device 400 (see fig. 55), the reflective mirror 300 can be mounted on the first guide rail 322 or the second guide rail 342 through a sliding block or a fixed block, the sliding block or the fixed block is mounted on the first guide rail 322 or the second guide rail 342 and can slide along the first guide rail 322 or the second guide rail 342 together with the reflective mirror 300, and the distance measuring device 400 is fixedly mounted on the beam assembly 30. The reflective mirror 300 may be a target 300, and two targets are mounted on the first guide rail 322 and the second guide rail 342 by a slider or a fixed block. The mirror or target 300 may also be directly mounted to the beam assembly 30 by way of a hook or the like, in which case the first 322 and second 342 guide rails may be eliminated.

The above distance measuring device 400 is used to measure the height of the beam assembly 30 from the ground, and is preferably displayed on the liquid crystal screen of the distance measuring device 400. In one embodiment, distance measuring device 400 is a laser rangefinder. The base 10 is provided with a through hole 120 for allowing the laser of the laser range finder 400 to strike the ground, thereby measuring the height of the beam assembly 30 from the ground.

For another example, the calibration element is a pattern plate 500 (see fig. 56), and the first and

second holders

312 and 332 jointly lift the pattern plate 500 to prevent falling. In addition, the first guide rail 322 may further include a first fixing block 510, the first fixing block 510 may slide along the first guide rail 322, the second guide rail 342 is provided with a second fixing block 520, the second fixing block 520 may slide along the second guide rail 342, the first fixing block 510 and the second fixing block 520 are respectively located at opposite sides of the pattern plate 500, and the first fixing block 510 and the second fixing block 520 cooperatively clamp the pattern plate 500.

In an alternative embodiment, the first and second fixing blocks 510 and 520 are sliders for mounting the reflective mirror 300. A clamping groove is formed in the opposite side edge of the slider to clamp the pattern plate 500, so that a fixed block is formed. It is understood that the first fixing block 510 and the second fixing block 520 may also be magnetic blocks, which attract the pattern plate 500 from the rear side by magnetic attraction, so as to enhance the firmness of the pattern plate 500 mounted on the beam assembly 30.

Referring to fig. 57, 58 and 59, the mounting base 35 includes a base plate 357, the base end of the base plate 357 is connected to the mounting surface of the mounting base 35 by a hinge, etc., and the base plate 357 can rotate up and down relative to the mounting base 35. The backing plate 357 comprises a hanging surface and a supporting surface which are oppositely arranged, the hanging surface of the backing plate 357 is provided with first positioning protrusions 3572, and the two first positioning protrusions 3572 are arranged along the length direction of the beam.

The mounting surface of the mounting seat 35 is provided with a receiving groove 358, and the shape of the receiving groove 358 is matched with the shape of the backing plate 357, so that the backing plate 357 can be clamped in the receiving groove 358.

The mounting surface of the first fixed block 510 is provided with second positioning protrusions 512, and the two second positioning protrusions 512 are arranged along the length direction of the beam. The two second positioning protrusions 512 are used for accurately positioning the target when the target is installed. Optionally, the first fixing block 510 is coated with or includes a magnetic material or is mounted with a magnetic element, or is a magnetic block itself, so as to realize the attraction-type mounting of the target. Optionally, the first fixing block 510 is provided with a third positioning mechanism 514, and the third positioning mechanism 514 may be a positioning structure such as a slot and a bump.

Similarly, the mounting surface of the second fixing block 520 is provided with third positioning protrusions 522, and the two third positioning protrusions 522 are arranged along the length direction of the cross beam. The two third positioning protrusions 522 are used for accurately positioning the target when the target is installed. Optionally, the second fixing block 520 is coated with or includes a magnetic material or is mounted with a magnetic element, thereby achieving a suction-type mounting of the small target. Optionally, the second fixing block 520 is provided with a fourth positioning mechanism 524, the fourth positioning mechanism 524 may be a positioning structure such as a slot and a protrusion, and the third positioning mechanism 514 and the fourth positioning mechanism 524 are disposed opposite to each other.

The pad 357 may be rotatable between a first position and a second position.

In the first position, the pad 357 is tightly fitted into the receiving groove 358, and the mounting surface of the pad 357, the mounting surface of the mounting seat 35, the mounting surface of the first fixing block 510, and the mounting surface of the second fixing block 520 face in the same direction. Wherein the mounting surface of the pad 357 protrudes from the mounting surface of the mounting seat 35, and the mounting surface of the pad 357, the mounting surface of the first fixed block 510, and the mounting surface of the second fixed block 520 are located on the same plane (see fig. 56). In calibrating the vehicle-mounted component, the pad 357, the first fixing block 510, and the second fixing block 520 may be respectively used for mounting one calibration component. In this case, their mounting surfaces are in the same plane, meaning that the surfaces for calibration of the calibration elements (assumed to be designed to have the same thickness) on which they are respectively mounted are in the same plane. Preferably, positioning structures for accurately mounting the calibration elements at predetermined positions of the respective mounting surfaces, such as the first positioning protrusions 3572, the second positioning protrusions 512 and the third positioning protrusions 522, are provided on the mounting surface of the backing plate 357, the mounting surface of the first fixing block 510 and the mounting surface of the second fixing block 520. At this time, the pad 357, the first fixing block 510, and the second fixing block 520 may be independently used to mount a small calibration member having a light weight, for example, a mirror, a small pattern plate, etc. (see fig. 53). Optionally, the back surface of the calibration element may be provided with a positioning structure, such as a limiting hole (not shown), which is adapted to the positioning structure on the mounting surface, and the first positioning protrusion 3572, the second positioning protrusion 512, or the third positioning protrusion 522 may be inserted into the limiting hole to achieve positioning. Optionally, the first positioning protrusion 3572, the second positioning protrusion 512 or the third positioning protrusion 522 may have magnetism to enhance the attraction force to the calibration element.

In the second position, the pad 357 is rotated to be located under the mounting seat 35, and the supporting surface of the pad 357 faces the mounting seat and is flush with the mounting surface. At this time, the calibration stand 100 can be used to carry a large calibration element with a large weight and volume, such as a large target plate (usually a large pattern plate). The bottom side of the large pattern plate is supported by the first positioning mechanism 3120 and the second positioning mechanism 3320, and the left and right sides of the large pattern plate are respectively engaged with the third positioning mechanism 514 and the fourth positioning mechanism 524 (see fig. 54). Since the first and second fixing blocks 510 and 520 have a certain thickness, if the target is to be mounted using the first and

second positioning mechanisms

3120 and 3320 on the sides thereof, the target is necessarily mounted on a plane slightly behind the mounting surfaces of the first and second fixing blocks 510 and 520. The switching of the backing plate 357 between the first and second positions is to adjust for the difference in distance between the target mounting planes in both installations. The back of the pattern plate can not abut against the supporting surface of the mounting seat 35, and practice proves that the large pattern plate can be firmly mounted only by means of the fixing function of the first fixing block 510 and the second fixing block 520 and the bearing function of the supporting rod. Alternatively, the back surface of the pattern plate may abut against the support surface of the mount 35, and the mounting surface of the mount 35 may be coated with a magnetic material or mounted with a magnetic unit, or the mount 35 is made of a magnetic material for attracting the back surface of the large pattern plate. Alternatively, the support surface of the spacer 357 may be coated with a magnetic material or mounted with a magnetic unit, or the spacer 357 is made of a magnetic material for attracting the back surface of the large pattern plate. Alternatively, the support surface of the backing plate 357 and the mounting surface of the mounting seat 35 may have no mounting function, and only the clamping action of the third positioning mechanism 514 and the fourth positioning mechanism 524 and the holding action of the first holder 312 and the second holder 332 can sufficiently support a pattern plate with a larger area.

It is understood that in some other embodiments, the pad 357 may be rotated in any direction such that the pad 357 is engaged with the receiving slot 358 or disengaged from the receiving slot 358 to rotate to the supporting surface of the pad 357 without interfering with the target mounting between the third positioning mechanism 514 and the fourth positioning mechanism 524.

In other embodiments, the magnetic attraction between the mounting surfaces of the first and second mounting

blocks

510 and 520 may be used to mount a large target. Similarly, the lower end of the large target is supported by the first supporting member 312 and the second supporting member 332, and is positioned by the first positioning mechanism 3120 and the second positioning mechanism 3320. Optionally, the pad 357 is in the first position and the magnetic attraction of the pad 357 is used to enhance the attraction force on large targets. Alternatively, the mounting surface of the mounting seat 35 may be a single body, the groove 358 and the pad 357 are not formed thereon, and the mounting surface of the mounting seat 35 is formed to be flush with the mounting surfaces of the first and second fixing blocks 510 and 520. When mounting large targets using magnetic attraction of the mounting surfaces of the first fixture block 510 and the second fixture block 520, all targets are mounted on the same plane for different targets or target combinations used for different vehicle types, which eliminates the need for additional compensation steps or realignment of the racks.

As for the positioning method of the large target plate, the following method can be adopted. In the calibration of most vehicle models, the large target plate is aligned with the central axis of the vehicle, so only how to position the large target plate in the center of the calibration frame will be described. Positioning requirements at other locations may be similarly designed. In one embodiment, locating structures, such as locating protrusions 512, may be provided on the loading surface of one or more of the first fixture block 510, the second fixture block 520, the mount 35, and the backing plate 357 to locate the large target plate. When the large target plate is positioned using the

positioning protrusions

512 and 522 of the first and second fixing blocks 510 and 520, the first and second fixing blocks 510 and 520 may be placed at preset positions on the beam, which may be read by a scale on the beam. In another embodiment, a positioning mechanism (not shown in the drawings) adapted to the first positioning mechanism 3120 and the second positioning mechanism 3320 may be disposed at the bottom of the large target plate, and after the first support rod 31 and the second support rod 32 are put down, the support 3303 is in a fixed position, so that the large target plate can be positioned by the first positioning mechanism 3120 and the second positioning mechanism 3320.

In the case where the large target plate is clamped by the clamping

grooves

514 and 524 of the first fixing block 510 and the second fixing block 520, the mounting plane of the large target plate is not identical to the mounting planes of the other small targets, and a certain distance difference exists. The distance difference can be compensated for using software. The calibration stand 100 can also be pushed in the direction of the vehicle by this distance difference before the calibration of the large target plate, so that the mounting plane of the large target plate is virtually coplanar with the mounting planes of the other small target plates. The method of positioning the calibration support 100 may use any suitable means known or devised in the future.

It is understood that the first positioning mechanism 3120, the second positioning mechanism 3320, the third positioning mechanism 514, and the fourth positioning mechanism 524 may be any configuration of positioning mechanism, such as slots, protrusions, pits, collars, bumps, etc., and are not limited to the slots shown in the drawings. As shown in fig. 36, the

positioning mechanisms

3120, 3320 may also include a beveled cross-section to more securely support the target plate.

It is understood that the number of the support pins included in the calibration stand 100 is not necessarily two, and other numbers are also possible. When the support rod is arranged in the middle of the cross beam of the calibration support 100, there may be only one support rod, and the lower end of the support (corresponding to the

support members

332 and 312 in fig. 36) is additionally designed to be lengthened in the extending direction of the cross beam, so as to support the target well.

It can be understood that when the target is mounted on the mounting surfaces of the first fixing block 510, the second fixing block 520 and the cushion plate 357, the target can be mounted by other means such as hooks besides the magnetic attraction manner.

Referring to fig. 60, in some embodiments, the cross-beam cross-section can be other shapes, such as circular. The target mounting member 35a defines a receiving cavity 350a, the receiving cavity 350a is substantially cylindrical and horizontally disposed, the target mounting member 35a includes a guiding rod 352a, and the guiding rod 352a is horizontally disposed in the receiving cavity. The cross beam 36a is substantially cylindrical, and the outer wall thereof is provided with a guide groove 362a, the guide groove 362a is arranged along the length direction of the cross beam 36a, and the shape thereof is matched with the shape of the guide rod 352a, so that the guide groove 362a can clamp the guide rod 352 a. The diameter of the beam 36a is slightly larger than the width of the opening of the receiving cavity 350a, and the beam 36a can be pushed into the receiving cavity 350a or taken out from the receiving cavity 350a by applying a force to the beam 36 a. Applying force to the beam 36a also causes the beam 36a to slide along its length relative to the target mount 35 a.

The diameter of the beam 36a is slightly larger than the width of the opening of the receiving cavity 350a, and the beam 36a can be mounted in the receiving cavity 350a by pushing the beam 36a into the receiving cavity 350a with a force, and the beam 36a can be more firmly mounted to the target mounting member 35a by the guide groove 362a being clamped to the guide rod 352 a. The guide grooves 362a and the guide rods 352a are disposed along the length of the cross beam 36a, and guide the cross beam 36a to move relative to the target mount 35a along the length thereof, so as to adjust the left-right position of the cross beam 36 a.

It is understood that in some other embodiments, the cross-section of the cross-beam 36a and the cross-section of the receiving cavity 350a may be configured in other shapes, such as an oval shape, a trapezoid shape, etc., as required, as long as the cross-section of the cross-beam 36a and the cross-section of the receiving cavity 350a are adapted such that the cross-beam 36a can be pushed into the receiving cavity 350a or pulled out of the receiving cavity 350a by applying a force to the cross-beam 36 a.

In order to securely mount the cross beam 36a to the mounting seat 35, the contact surface between the mounting seat 35 and the cross beam 36a varies according to the cross section of the cross beam 36a, as long as the contact surface between the mounting seat 35 and the cross beam 36a is adapted to the cross section of the cross beam 36a, so that the cross beam 36a can be securely mounted to the mounting seat 35, for example, the cross section of the cross beam 36a is circular, and the contact surface between the mounting seat 35 and the cross beam 36a is substantially cylindrical. Of course, the contact surface between the mounting seat 35 and the cross beam 36a may not be changed according to the cross section change of the cross beam 36a, and a positioning or limiting structure may be disposed on the contact surface between the mounting seat 35 and the cross beam 36a to prevent the cross beam 36a from rolling, for example, a limiting block is disposed on the contact surface between the mounting seat 35 and the cross beam 36a, and a limiting groove is disposed on the outer wall of the cross beam 36 a.

In some embodiments, the first mount 510 and the second mount 520 shown in fig. 57-59 can employ the structure of the target mount 35a, and correspondingly, the beam shown in fig. 57-59 employs the structure of the beam 36 a.

In the above embodiment, the vertical rod of the calibration bracket can be folded or extended, and the base can be detachably connected with the vertical rod. This will reduce the size of the calibration stand very significantly, making it very suitable for handling, especially transportation in a vehicle. Furthermore, this enables the use of a base with a large size, in particular a base with a large transverse size, which is advantageous for radar calibration, since radar calibration elements are generally heavy and often need to be placed on one side of the cross-beam of the calibration stand, thus requiring the use of a base with a large transverse size, which is not very suitable for transport. The solution in this embodiment solves this problem by separating the base from the first upright and the second upright being telescopically collapsible or foldable, the entire calibration stand can be transported in the vehicle even if the base has a large lateral dimension (e.g. close to 1 meter).

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A calibration support, comprising:

a base;

a beam assembly supported by the stand assembly.

2. Calibration support according to claim 1, characterized in that it comprises a base fixing member mounted to one of said base and said first upright and fastenable to the other so that said second upright is fixed to said base, said base fixing member also being disengageable from the other so that said first upright is detachable from said base.

3. Calibration support according to claim 2, wherein one of the first upright and the base is provided with a first stop structure and the other is provided with a second stop structure, the first stop structure and the second stop structure being mutually engageable to limit the movement of the first upright relative to the base.

4. The calibration support according to claim 3, wherein the first limiting structure is a limiting groove, the second limiting structure is a limiting rod, and the limiting rod can be clamped in the limiting groove and abut against at least a part of the edge of the limiting groove.

5. The calibration support according to claim 4, wherein the limiting groove is a through hole radially communicating the large hole site and the small hole site, and the limiting rod can pass through the large hole site and then be engaged with the small hole site.

6. The calibration support of claim 3, wherein said base fixture comprises a pulling handle and a snap;

7. The calibration support according to claim 6, wherein the first vertical rod is provided with an inverted hook portion, and the fastening member is fastened to the inverted hook portion, so that the base is fixedly connected to the first vertical rod.

8. The calibration support according to claim 1, wherein the second vertical rod is disposed inside or sleeved outside the first vertical rod, and the second vertical rod is movable relative to the first vertical rod along the length direction of the first vertical rod;

the beam assembly is supported by the second upright.

9. The calibration bracket of claim 8, wherein the cross-section of the first upright and the second upright is non-circular.

10. The calibration support according to claim 8, wherein one of the first vertical rod and the second vertical rod comprises a guide rail, and the other of the first vertical rod and the second vertical rod is guided by the guide rail and can move only along the length direction of the first vertical rod.

11. Calibration support according to claim 8, characterised in that the mast assembly comprises a drive mechanism mounted to the first upright for driving the second upright to move relative to the first upright in the length direction of the first upright.

12. Calibration support according to claim 1, characterised in that the end of the first upright remote from the base is pivotally connected to the end of the second upright so that the second upright can be folded with respect to the first upright.

13. The calibration support according to claim 12, wherein a first fastener is disposed at an end of the first vertical rod away from the base, and a second fastener is disposed at an end of the second vertical rod, and the first fastener and the second fastener can be fastened to each other to fasten the second vertical rod to the first vertical rod.

14. Calibration support according to claim 1, characterised in that the stand assembly comprises a third upright, which is connected to the second upright, which third upright and second upright can be telescoped or folded to reduce the length of the stand assembly.

15. Calibration support according to claim 1, wherein the cross-beam assembly comprises a cross-beam, which is detachably mounted to the stand assembly.

16. The calibration support of claim 15, wherein said cross-beam assembly includes a mounting base, said mounting base being supported by said riser assembly;

17. Calibration support according to claim 16, wherein said mounting seat is provided at a top surface of said stand assembly.

18. The calibration support according to claim 16, wherein the mounting seat is defined to form a mounting channel, and the mounting channel is not closed and has a gap, and the cross beam is mounted in the mounting channel, and the gap is used to facilitate mounting the cross beam in the mounting channel through the gap and removing the cross beam from the mounting channel through the gap.

19. The calibration support according to claim 16, wherein the mounting seat includes a first limiting mechanism, and the connecting portion includes a second limiting mechanism adapted to the first limiting mechanism;

20. Calibration support according to claim 16, characterised in that the mounting seat is provided with fixing means which press the cross-beam against the mounting seat so as to press the cross-beam against the bottom and one side of the mounting seat.

21. The calibration support of claim 15, wherein the cross-beam comprises a left cross-beam portion, a right cross-beam portion, and a connecting portion, the connecting portion being detachably mounted to the stand assembly, one end of the connecting portion being pivotally connected to the left cross-beam portion, and the other end of the connecting portion being pivotally connected to the right cross-beam portion.

22. Calibration system, characterized in that it comprises a calibration element and a calibration support according to any one of claims 1 to 21, the calibration element being loadable from the calibration support.