CN215909864U

CN215909864U - Positioning device

Info

Publication number: CN215909864U
Application number: CN202121958834.5U
Authority: CN
Inventors: 龙会林; 马宏伟; 巴金龙; 杨泽豪
Original assignee: China Second Metallurgy Group Co Ltd
Current assignee: China Second Metallurgy Group Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-25
Anticipated expiration: 2031-08-19

Abstract

The utility model relates to a positioning device, which comprises a placing mechanism, a lifting mechanism and a supporting mechanism, wherein the placing mechanism is arranged on the upper portion of the placing mechanism; the lifting mechanism comprises a telescopic component and an adjusting component, the adjusting component is in transmission connection with the telescopic component, and the adjusting component is used for adjusting the extension and the shortening of the telescopic component; the top end of the telescopic assembly is connected with the placing mechanism, the placing mechanism can rotate relative to the telescopic assembly, and the bottom end of the telescopic assembly is connected with the supporting mechanism; the placing mechanism is used for placing the suspended ceiling; the lifting mechanism is used for adjusting the height of the placing mechanism relative to the ground; due to the arrangement, the lifting mechanism is arranged, so that the accuracy of ceiling installation is improved, and the construction quality is ensured; meanwhile, the construction efficiency is improved, and the construction period is shortened.

Description

Positioning device

Technical Field

The utility model relates to the technical field of decoration, in particular to a positioning device.

Background

At present, the keel frame is an important building material in the ceiling construction process of decoration. The keel frame is a building material for supporting and fixing structure, and is used as skeleton and base material in building decoration structure. The skeleton is unevenness and unstable structure, can lead to covering whole gypsum board and skeleton on the skeleton not the natural laminating, but causes the gypsum board self to warp under the effort of self tapping screw and laminates on the skeleton after warping. However, long term stress imbalance can result in deformation cracking of the final gypsum board, thereby resulting in cracking of the top coat paint of the gypsum board.

However, the distance between the keel frames is too large, so that the construction quality of the suspended ceiling is poor; meanwhile, the construction cost is increased, and the construction period is prolonged.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide the positioning device which has the advantages of improving the construction quality of the suspended ceiling, reducing the construction cost and shortening the construction period.

The above object of the present invention is achieved by the following technical solutions: a positioning device comprises a placing mechanism, a lifting mechanism and a supporting mechanism; the lifting mechanism comprises a telescopic component and an adjusting component, the adjusting component is in transmission connection with the telescopic component, and the adjusting component is used for adjusting the extension and the contraction of the telescopic component; the top end of the telescopic assembly is connected with the placing mechanism, the placing mechanism can rotate relative to the telescopic assembly, and the bottom end of the telescopic assembly is connected with the supporting mechanism; the placing mechanism is used for placing the suspended ceiling; the lifting mechanism is used for adjusting the height of the placing mechanism relative to the ground.

Preferably, in the positioning device provided by the present invention, the telescopic assembly includes a first sleeve and a second sleeve, one end of the first sleeve is inserted into the second sleeve, and the first sleeve can slide along the second sleeve; one end of the first sleeve, which is away from the second sleeve, is connected with the placing mechanism, and one end of the second sleeve, which is away from the first sleeve, is connected with the supporting mechanism.

Preferably, in the positioning device provided by the utility model, the adjusting assembly comprises a driving gear and a driven gear set, the driving gear is rotatably connected with a vertical plate on the supporting mechanism, and the driving gear can rotate relative to the vertical plate; the first end of the driven gear assembly is rotatably connected with the vertical plate, the second end of the driven gear assembly is in transmission connection with the first sleeve, and the first end of the driven gear assembly is connected with the driving gear through a chain.

Preferably, in the positioning device provided by the utility model, the driven gear assembly comprises a first gear, a second gear and a rotating shaft, the first gear is positioned on the vertical plate, and one end of the rotating shaft sequentially penetrates through the vertical plate and the first gear to be connected with the second gear; the outer peripheral wall of the first sleeve is provided with a rack extending along the central axis direction of the first sleeve, the rack is meshed with the second gear, and the second gear is used for driving the first sleeve to slide along the extending direction of the second sleeve; the first gear is connected with the driving gear through the rack.

Preferably, in the positioning device provided by the utility model, a handle is arranged on one side of the vertical plate, which is away from the driving gear, one end of the handle penetrates through the vertical plate to be connected with the driving gear, and the handle is used for driving the driving gear to rotate.

Preferably, in the positioning device provided by the present invention, a notch extending along a central axis direction of the second sleeve is formed at a top end of the second sleeve, the notch is arranged corresponding to the rack, and the second gear is engaged with the rack through the notch.

Preferably, in the positioning device provided by the present invention, the placing mechanism includes a placing frame and a rotating rod, the rotating rod is disposed at the bottom end of the placing frame, one end of the rotating rod, which is away from the placing frame, is inserted into the top end of the telescopic assembly, and the rotating rod can rotate relative to the telescopic assembly.

Preferably, in the positioning device provided by the present invention, the placing frame is provided with an adjusting rod, and the adjusting rod is used for adjusting the orientation of the placing frame.

Preferably, in the positioning device provided by the utility model, the adjusting rod is a telescopic rod.

Preferably, in the positioning device provided by the present invention, the support mechanism includes a plurality of inclined rods, a horizontal plate and the vertical plate, the plurality of inclined rods are arranged in an inclined manner with respect to the horizontal plane, the plurality of inclined rods are arranged around the second sleeve at intervals in the circumferential direction, one ends of the plurality of inclined rods are connected to the outer circumferential wall of the second sleeve, the other ends of the plurality of inclined rods are connected to the horizontal plate, and one end of the horizontal plate is connected to the vertical plate.

In conclusion, the beneficial technical effects of the utility model are as follows: the positioning device comprises a placing mechanism, a lifting mechanism and a supporting mechanism; the lifting mechanism comprises a telescopic component and an adjusting component, the adjusting component is in transmission connection with the telescopic component, and the adjusting component is used for adjusting the extension and the shortening of the telescopic component; the top end of the telescopic assembly is connected with the placing mechanism, the placing mechanism can rotate relative to the telescopic assembly, and the bottom end of the telescopic assembly is connected with the supporting mechanism; the placing mechanism is used for placing the suspended ceiling; the lifting mechanism is used for adjusting the height of the placing mechanism relative to the ground; due to the arrangement, the lifting mechanism is arranged, so that the accuracy of ceiling installation is improved, and the construction quality is ensured; meanwhile, the construction efficiency is improved, and the construction period is shortened.

Drawings

Fig. 1 is a schematic overall structure diagram of a positioning device according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a placement frame in the positioning device according to the embodiment of the present invention.

In the figure, 1, a positioning device; 10. a lifting mechanism; 101. a telescoping assembly; 1011. a first sleeve; 1012. a second sleeve; 1013. opening the gap; 1014. a rack; 102. an adjustment assembly; 1021. a driving gear; 1022. a first gear; 1023. a second gear; 1024. a rotating shaft; 1025. a handle; 20. a placement mechanism; 201. placing the frame; 2011. a first connecting rod; 2012. a second connecting rod; 202. a rotating rod; 203. adjusting a rod; 30. a support mechanism; 301. an inclined lever; 302. a horizontal plate; 303. a vertical plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, a positioning apparatus 1 disclosed in the present invention includes a placing mechanism 20, a lifting mechanism 10, and a supporting mechanism 30; the placing mechanism 20 is arranged at the top end of the lifting mechanism 10, the placing mechanism 20 can rotate relative to the lifting mechanism 10, and the supporting mechanism 30 is used for fixing and supporting the lifting mechanism 10; in the using process, the suspended ceiling is placed on the placing mechanism 20, and the suspended ceiling is placed at a specified position by adjusting the lifting mechanism 10; therefore, the construction period is shortened, and the construction efficiency is improved.

The lifting mechanism 10 comprises a telescopic assembly 101 and an adjusting assembly 102, the adjusting assembly 102 is in transmission connection with the telescopic assembly 101, and the adjusting assembly 102 is used for adjusting the extension and the contraction of the telescopic assembly 101; the top end of the telescopic assembly 101 is connected with the placing mechanism 20, the placing mechanism 20 can rotate relative to the telescopic assembly 101, and the bottom end of the telescopic assembly 101 is connected with the supporting mechanism 30; the placing mechanism 20 is used for placing a suspended ceiling; the lifting mechanism 10 is used for adjusting the height of the placing mechanism 20 relative to the ground; by arranging the adjusting assembly 102, the length of the telescopic assembly 101 is adjusted by the adjusting assembly 102 in the using process, so that the accuracy of the mounting position of the suspended ceiling is improved; meanwhile, the ascending of workers is avoided, and the safety of the workers is improved.

Further, in the present embodiment, the telescopic assembly 101 includes a first sleeve 1011 and a second sleeve 1012, one end of the first sleeve 1011 is inserted into the second sleeve 1012, and the first sleeve 1011 can slide along the second sleeve 1012; the end of the first sleeve 1011, which is far away from the second sleeve 1012, is connected with the placing mechanism 20, and the end of the second sleeve 1012, which is far away from the first sleeve 1011, is connected with the supporting mechanism 30; adjustment of the length of the telescopic assembly 101 is thereby facilitated by the first sleeve 1011 sliding along the second sleeve 1012.

Specifically, the central axis of the first sleeve 1011 is parallel to the central axis of the second sleeve 1012, and in some implementations, the central axis of the first sleeve 1011 and the central axis of the second sleeve 1012 are arranged in a common line. The diameter of the first sleeve 1011 is smaller than that of the second sleeve 1012, one end of the first sleeve 1011 is inserted into the second sleeve 1012, and the first sleeve 1011 can slide relative to the second sleeve 1012, so that the length of the telescopic assembly 101 can be adjusted conveniently.

Further, in the present embodiment, the supporting mechanism 30 includes a plurality of inclined rods 301, a horizontal plate 302 and a vertical plate 303, the plurality of inclined rods 301 are arranged obliquely with respect to the horizontal plane, the plurality of inclined rods 301 are arranged at intervals around the circumference of the second sleeve 1012, one ends of the plurality of inclined rods 301 are connected to the outer circumferential wall of the second sleeve 1012, the other ends of the plurality of inclined rods 301 are connected to the horizontal plate 302, and one end of the horizontal plate 302 is connected to the vertical plate 303; by providing a plurality of tilting bars 301, the stability of the positioning device 1 is thereby improved, avoiding toppling over during use.

Specifically, the inclined rod 301 is arranged at the bottom end of the second sleeve 1012, the horizontal plate 302 is parallel to the horizontal plane, and the side of the horizontal plate 302, which is far away from the ground, is connected with the inclined rod 301. Wherein the support mechanism 30 may comprise three tilting levers 301, four tilting levers 301 or five tilting levers 301, etc., in this embodiment, the support mechanism 30 comprises three tilting levers 301, the three tilting levers 301 being arranged at intervals around the circumference of the second sleeve 1012.

The vertical plate 303 is perpendicular to the horizontal plate 302, the vertical plate 303 extends along the central axis of the second sleeve 1012, the vertical plate 303 and the horizontal plate 302 form an L shape, and a preset distance is formed between the vertical plate 303 and the second sleeve 1012, so that the adjustment assembly 102 is conveniently mounted.

Further, one side that horizontal plate 302 deviates from slope pole 301 is provided with a plurality of conical rods, and a plurality of conical rods are the rectangular array and arrange, and the big footpath end of a plurality of conical rods all is connected with horizontal plate 302, and in the use, the path end and the ground contact of a plurality of conical rods have increased the frictional force on supporting mechanism 30 and ground, have further improved positioner 1's stability.

With reference to fig. 1, in the present embodiment, the adjusting assembly 102 includes a driving gear 1021 and a driven gear set, the driving gear 1021 is rotatably connected to the vertical plate 303 of the supporting mechanism 30, and the driving gear 1021 can rotate relative to the vertical plate 303; the first end of the driven gear assembly is rotatably connected with the vertical plate 303, the second end of the driven gear assembly is in transmission connection with the first sleeve 1011, and the first end of the driven gear assembly is connected with the driving gear 1021 through a chain; in use, the driving gear 1021 rotates to drive the chain to rotate, the chain drives the driven gear set to rotate, and the driven gear set drives the first sleeve 1011 to slide along the second sleeve 1012.

In the orientation shown in fig. 1, for example, the first end of the driven gear set is the right end, and the second end of the driven gear set is the left end.

Specifically, the driving gear 1021 is arranged on one side, facing the telescopic assembly 101, of the vertical plate 303, the driven gear set is arranged on one side, facing the telescopic assembly 101, of the vertical plate 303, the driving main wheel and the driven gear set are spaced at a predicted distance, and the chain is sleeved at the first ends of the driving gear 1021 and the driven gear set.

Exemplarily, an electric motor is arranged on one side of the vertical plate 303, which is far away from the driving gear 1021, the output end of the electric motor is parallel to the central axis of the driving gear 1021, and the output end of the electric motor passes through the vertical plate 303 and is connected with the driving gear 1021; in the use, the motor rotates and drives driving gear 1021 and rotate, and driving gear 1021 drives the chain and rotates, and the chain drives driven gear set and rotates, and driven gear set drive first sleeve 1011 slides along second sleeve 1012, from this, uses manpower sparingly, improves the efficiency of construction.

In this embodiment, a handle 1025 is disposed on one side of the vertical plate 303 away from the driving gear 1021, one end of the handle 1025 penetrates through the vertical plate 303 to be connected with the driving gear 1021, and the handle 1025 is used for driving the driving gear 1021 to rotate; in use, the drive gear 1021 is driven to rotate by rotating the handle 1025.

Specifically, the handle 1025 comprises a holding part and a rotating part, one end of the rotating part is connected with the holding part, the rotating part is rod-shaped, the central axis of the rotating part is parallel to that of the driving gear 1021, and one end of the rotating part, which is far away from the holding part, penetrates through the vertical plate 303 and is connected with the driving gear 1021; through setting up the portion of gripping, from this, the staff operation of being convenient for.

In some embodiments, the holding part is sleeved with a rubber sleeve, so that the comfort of workers is improved.

Further, in this embodiment, the driven gear assembly includes a first gear 1022, a second gear 1023, and a rotating shaft 1024, the first gear 1022 is located on the vertical plate 303, and one end of the rotating shaft 1024 passes through the vertical plate 303 and the first gear 1022 in sequence to be connected with the second gear 1023; a rack 1014 extending along the central axis direction of the first sleeve 1011 is arranged on the outer peripheral wall of the first sleeve 1011, the rack 1014 is meshed with a second gear 1023, and the second gear 1023 is used for driving the first sleeve 1011 to slide along the extending direction of the second sleeve 1012; the first gear 1022 is connected with the driving gear 1021 through the rack 1014; by providing the rack 1014, the rack 1014 is engaged with the second gear 1023, the second gear 1023 rotates, the rack 1014 is driven to move, and the second rack 1014 drives the first sleeve 1011 to slide along the second sleeve 1012.

Specifically, the first gear 1022 is located on one side of the vertical plate 303 facing the telescopic assembly 101, a central axis of the first gear 1022 and a central axis of the second gear 1023 are both parallel to a central axis of the driving gear 1021, and the central axis of the first gear 1022 and the central axis of the second gear 1023 are arranged in a collinear manner, in the using process, the first gear 1022 and the second gear 1023 rotate coaxially, the central axis of the rotating shaft 1024 is parallel to the central axis of the first gear 1022, and one end of the rotating shaft 1024 sequentially penetrates through the vertical plate 303 and the first gear 1022 to be connected with the second gear 1023; wherein, the driving gear 1021 rotates and drives the chain to rotate, the chain drives the first gear 1022 to rotate, the first gear 1022 drives the rotating shaft 1024 to rotate, the rotating shaft 1024 drives the second gear 1023 to rotate, and the second gear 1023 drives the rack 1014 to move.

Further, the positioning device 1 provided by this embodiment further includes a limit screw, a threaded hole extending along the radial direction of the second sleeve 1012 is provided on the outer peripheral wall of the second sleeve 1012, the threaded hole is communicated with the inner cavity of the second sleeve 1012, and after the ceiling reaches a specified position, one end of the limit screw is screwed into the threaded hole to abut against the outer peripheral wall of the first sleeve 1011, thereby preventing the first sleeve 1011 from sliding along the second sleeve 1012 under the action of gravity of the ceiling.

With reference to fig. 1, in the present embodiment, a slit 1013 is formed at the top end of the second sleeve 1012 and extends along the central axis direction of the second sleeve 1012, the slit 1013 is disposed corresponding to the rack 1014, and the second gear 1023 is engaged with the rack 1014 through the slit 1013.

Specifically, the gap 1013 is communicated with the inner cavity of the second sleeve 1012, and the second gear 1023 is partially inserted in the gap 1013, so that the second gear 1023 is connected with the rotating shaft 1024.

With continued reference to fig. 1 and fig. 2, in the present embodiment, the placing mechanism 20 includes a placing frame 201 and a rotating rod 202, the rotating rod 202 is disposed at the bottom end of the placing frame 201, one end of the rotating rod 202 departing from the placing frame 201 is inserted into the top end of the telescopic assembly 101, and the rotating rod 202 can rotate relative to the telescopic assembly 101; can rotate telescopic component 101 relatively through placing mechanism 20, from this, be convenient for adjust the angle of placing the furred ceiling on placing mechanism 20, further improved the degree of accuracy of furred ceiling installation.

Specifically, the placing frame 201 is disposed parallel to the horizontal plane, and the placing frame 201 may be rectangular, rhombic, or other polygonal shapes, which is not limited in this embodiment.

In an implementation manner that the placing frame 201 is rectangular, a plurality of first connecting rods 2011 and a plurality of second connecting rods 2012 are arranged inside the placing frame 201, the plurality of first connecting rods 2011 are arranged at intervals along the length direction of the placing frame 201, and two ends of each first connecting rod 2011 are connected with the inner wall of the placing frame 201; a plurality of second connecting rods 2012 are arranged at intervals along the width direction of the placing frame 201, and both ends of the second connecting rods 2012 are connected with the inner wall of the placing frame 201; by providing the first connecting rod 2011 and the second connecting rod 2012, the strength of the placement frame 201 is improved.

Wherein, the axis of bull stick 202 is parallel with the axis of first sleeve 1011, and in some realizable modes, the axis of bull stick 202 and the axis collineation setting of first sleeve 1011, the one end of bull stick 202 with place the frame 201 and be connected, the other end of bull stick 202 is inserted and is located in first sleeve 1011, the bull stick 202 can rotate first sleeve 1011 relatively. In use, the placing frame 201 rotates around the central axis of the rotating shaft 1024.

Further, in this embodiment, the placing frame 201 is provided with an adjusting rod 203, and the adjusting rod 203 is used for adjusting the orientation of the placing frame 201; by providing the adjustment rod 203, it is convenient for the worker to adjust the orientation of the ceiling placed on the placement frame 201.

Specifically, the adjustment rod 203 extends downward along the central axis of the first sleeve 1011. Of course, the adjusting rod 203 may be replaced by a rope as long as the placing frame 201 can be rotated.

Further, in this embodiment, the adjusting rod 203 is a telescopic rod; therefore, the length of the adjusting rod 203 is adjusted according to the height required by the suspended ceiling placed on the placing frame 201, and therefore the bottom end of the adjusting rod 203 is prevented from being abutted against the ground; and also prevents the operator from being unable to reach the adjustment lever 203.

The using process of the positioning device 1 provided by the embodiment is as follows: to wait to install the furred ceiling and place on placing frame 201, and then drive driving gear 1021 rotates through rotating handle 1025, driving gear 1021 drives driven gear group and rotates, driven gear group drive rack 1014 removes, rack 1014 drives first sleeve 1011 and slides along second sleeve 1012, and then the height on the relative ground of installation furred ceiling is treated in the adjustment, will treat that the installation furred ceiling removes to the assigned position, through rotatory stop screw with first sleeve 1011's fixed, then treat the position of installing the furred ceiling and adjust through adjusting pole 203, realize the fixed of furred ceiling position.

The positioning device 1 provided by the application comprises a placing mechanism 20, a lifting mechanism 10 and a supporting mechanism 30; the lifting mechanism 10 comprises a telescopic assembly 101 and an adjusting assembly 102, the adjusting assembly 102 is in transmission connection with the telescopic assembly 101, and the adjusting assembly 102 is used for adjusting the extension and contraction of the telescopic assembly 101; the top end of the telescopic assembly 101 is connected with the placing mechanism 20, the placing mechanism 20 can rotate relative to the telescopic assembly 101, and the bottom end of the telescopic assembly 101 is connected with the supporting mechanism 30; the placing mechanism 20 is used for placing a suspended ceiling; the lifting mechanism 10 is used for adjusting the height of the placing mechanism 20 relative to the ground; due to the arrangement, the lifting mechanism 10 is arranged, so that the accuracy of ceiling installation is improved, and the construction quality is ensured; meanwhile, the construction efficiency is improved, and the construction period is shortened.

The positioning device 1 provided by the utility model has the following advantages: the device has simple structure, easy manufacture and convenient operation.

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

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the scope of the utility model.

Claims

1. A positioning device, characterized by: comprises a placing mechanism, a lifting mechanism and a supporting mechanism;

the lifting mechanism comprises a telescopic component and an adjusting component, the adjusting component is in transmission connection with the telescopic component, and the adjusting component is used for adjusting the extension and the contraction of the telescopic component;

the top end of the telescopic assembly is connected with the placing mechanism, the placing mechanism can rotate relative to the telescopic assembly, and the bottom end of the telescopic assembly is connected with the supporting mechanism;

the placing mechanism is used for placing the suspended ceiling;

the lifting mechanism is used for adjusting the height of the placing mechanism relative to the ground.

2. The positioning device of claim 1, wherein: the telescopic assembly comprises a first sleeve and a second sleeve, one end of the first sleeve is inserted into the second sleeve, and the first sleeve can slide along the second sleeve;

one end of the first sleeve, which is away from the second sleeve, is connected with the placing mechanism, and one end of the second sleeve, which is away from the first sleeve, is connected with the supporting mechanism.

3. The positioning device of claim 2, wherein: the adjusting assembly comprises a driving gear and a driven gear set, the driving gear is rotatably connected with a vertical plate on the supporting mechanism, and the driving gear can rotate relative to the vertical plate;

the first end of the driven gear assembly is rotatably connected with the vertical plate, the second end of the driven gear assembly is in transmission connection with the first sleeve, and the first end of the driven gear assembly is connected with the driving gear through a chain.

4. The positioning device of claim 3, wherein: the driven gear assembly comprises a first gear, a second gear and a rotating shaft, the first gear is positioned on the vertical plate, and one end of the rotating shaft sequentially penetrates through the vertical plate and the first gear to be connected with the second gear;

the outer peripheral wall of the first sleeve is provided with a rack extending along the central axis direction of the first sleeve, the rack is meshed with the second gear, and the second gear is used for driving the first sleeve to slide along the extending direction of the second sleeve;

the first gear is connected with the driving gear through the rack.

5. The positioning device of claim 3, wherein: one side of the vertical plate, which is far away from the driving gear, is provided with a handle, one end of the handle penetrates through the vertical plate to be connected with the driving gear, and the handle is used for driving the driving gear to rotate.

6. The positioning device of claim 4, wherein: the top end of the second sleeve is provided with a notch extending along the central axis direction of the second sleeve, the notch is arranged corresponding to the rack, and the second gear is meshed with the rack through the notch.

7. The positioning device of claim 1, wherein: the placing mechanism comprises a placing frame and a rotating rod, the rotating rod is arranged at the bottom end of the placing frame, one end of the rotating rod, which deviates from the placing frame, is inserted into the top end of the telescopic assembly, and the rotating rod can rotate relative to the telescopic assembly.

8. The positioning device of claim 7, wherein: the placing frame is provided with an adjusting rod, and the adjusting rod is used for adjusting the position of the placing frame.

9. The positioning device of claim 8, wherein: the adjusting rod is a telescopic rod.

10. The positioning device of claim 3, wherein: the supporting mechanism comprises a plurality of inclined rods, a horizontal plate and the vertical plate, the inclined rods are obliquely arranged relative to the horizontal plane, the inclined rods are arranged around the circumferential interval of the second sleeve, one ends of the inclined rods are connected with the circumferential wall of the second sleeve, the other ends of the inclined rods are connected with the horizontal plate, and one end of the horizontal plate is connected with the vertical plate.