CN217750925U - Internal stay device - Google Patents

Abstract

An internal supporting device is used for supporting and fixing a product with an inner cavity. The inner supporting device comprises a supporting shaft extending along a first direction. The internal support device further comprises a connecting piece, a sliding sleeve piece and a plurality of internal support mechanisms. The connecting piece is fixedly connected to one end of the supporting shaft. One end of the connecting piece far away from the supporting shaft is provided with an adsorption hole. The sliding sleeve piece is slidably sleeved on the supporting shaft along the first direction. A plurality of internal stay mechanisms are distributed on the periphery of the supporting shaft at intervals. Each internal stay mechanism includes a first link, a second link, and an internal stay. The inner supporting piece is positioned between the connecting piece and the sliding sleeve piece, one end of the first connecting rod is connected with the connecting piece, the other end of the first connecting rod is connected with one end of the inner supporting piece, which is adjacent to the connecting piece, one end of the second connecting rod is connected with the sliding sleeve piece, and the other end of the second connecting rod is connected with one end of the inner supporting piece, which is adjacent to the sliding sleeve piece. When the inner supporting device extends into the inner cavity, the adsorption hole forms negative pressure for adsorbing and fixing the inner wall of the product, and the inner supporting piece is radially expanded along the supporting shaft and abuts against the inner wall of the product. The inner supporting device can stably support and fix a product with an inner cavity.

Description

Internal stay device

Technical Field

The application relates to the technical field of processing, especially, relate to an internal stay device.

Background

When the outer surface of a product is polished, if a conventional clamping mode from the outer side is adopted, the operations such as polishing and the like are interfered. In addition, particularly for spherical products, there is a problem that the products cannot be stably supported and fixed.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an inner supporting device, which can stably support and fix a product having an inner cavity.

The embodiment of the application provides an internal support device for supporting and fixing a product with an inner cavity. The inner supporting device comprises a supporting shaft extending along a first direction. The internal support device further comprises a connecting piece, a sliding sleeve piece and a plurality of internal support mechanisms. The connecting piece is fixedly connected to one end of the supporting shaft. The one end that the connecting piece kept away from the back shaft is equipped with the absorption hole, the absorption hole is used for communicateing outside vacuum apparatus. The sliding sleeve piece is slidably sleeved on the supporting shaft along the first direction. A plurality of the internal supporting mechanisms are distributed on the periphery of the supporting shaft at intervals. Each internal stay mechanism comprises a first connecting rod, a second connecting rod and an internal stay piece. The inner supporting piece is positioned between the connecting piece and the sliding sleeve piece, one end of the first connecting rod is rotatably connected with the connecting piece, the other end of the first connecting rod is rotatably connected with one end of the inner supporting piece, which is close to the connecting piece, one end of the second connecting rod is rotatably connected with the sliding sleeve piece, and the other end of the second connecting rod is rotatably connected with one end of the inner supporting piece, which is close to the sliding sleeve piece. When the inner supporting device extends into the inner cavity, the adsorption hole forms negative pressure for adsorbing and fixing the inner wall of the product, and the sliding sleeve piece moves relative to the connecting piece so that the first connecting rod and the second connecting rod drive the inner supporting piece to be radially supported along the supporting shaft and abut against the inner wall of the product.

In some embodiments of the present application, the plurality of internal supporting mechanisms are equidistantly and intermittently distributed on the peripheral side of the supporting shaft.

In some embodiments of this application, the back shaft includes the axis body and encircles connect in a plurality of supporting parts of axis body week side and interval arrangement, connecting piece fixed connection in axis body one end, slip external member cup joint with the slidable in the axis body, adjacent two form the holding tank between the supporting part, each internal stay mechanism locates in the holding tank.

In some embodiments of the present application, the axis body is provided with a first end surface, the connecting piece is connected to the first end surface, and each supporting part is close to one end edge of the first end surface stretches out in the first direction the first end surface and the butt the connecting piece is arranged on the periphery side.

In some embodiments of the application, one end of each supporting portion, which is far away from the first end surface, is provided with a sliding groove for the sliding of the sliding sleeve component, and the sliding groove extends towards the connecting piece along the first direction.

In some embodiments of this application, the first terminal surface is concave to be equipped with first spacing groove, the connecting piece is kept away from one side of adsorption holes is equipped with spacing portion, spacing card of spacing portion is held in the first spacing groove.

In some embodiments of the present application, a profiling surface is disposed on a side of the inner support member away from the supporting shaft, and the profiling surface is adapted to the inner wall of the product.

In some embodiments of the present application, the supporting shaft is provided with a first channel, one end of the first channel is communicated with the adsorption hole, and the other end of the first channel is communicated with an external vacuum device.

In some embodiments of this application, the internal stay device still includes link and driving piece, the back shaft is kept away from the one end fixed connection of connecting piece in the link, driving piece fixed connection in link and transmission connection slide the external member.

In some embodiments of the present application, the internal bracing device further comprises a mechanical arm, wherein the mechanical arm is connected with the connecting frame and used for driving the connecting frame to move.

In the internal supporting device, the inner wall of the product is supported and fixed in multiple directions through the matching of the adsorption holes and the internal supporting piece, so that the product is stably supported and fixed. And, stretch into the inner chamber through the internal stay device and support fixed product, can reduce the risk to the interference of product surface.

Drawings

Fig. 1 is a schematic structural diagram of an internal bracing device according to an embodiment of the present application.

Fig. 2 is a schematic view of the structure of the inner supporting mechanism of the inner supporting device according to an embodiment of the present application.

Fig. 3 is a schematic structural view illustrating a retraction mechanism of an internal supporting device according to an embodiment of the present application.

Fig. 4 is a partially disassembled structural schematic diagram of an internal supporting device according to an embodiment of the present application.

Fig. 5 is a schematic structural view of a support shaft in an internal supporting device according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a connecting member in an internal supporting device according to an embodiment of the present application.

Fig. 7 is a cross-sectional view of fig. 3 along section line VII-VII.

Description of the main elements

Internal stay device 100

Support shaft 10

First passage 10a

Shaft body 11

First end surface 111

First limit groove 112

Support part 12

Chute 121

Accommodating tank 13

Connecting piece 20

Adsorption holes 20a

Stopper 21

First connecting arm group 22

Main body 23

First connecting arm 221

Sliding sleeve component 30

Second connection arm group 31

Second connecting arm 311

Inner supporting mechanism 40

First link 41

Second link 42

Inner support 43

Copying surface 431

First connecting groove 432

Second connecting groove 433

Hinge shaft 44

First joint 51

Second joint 52

Suction cup 53

Connecting frame 61

Supporting plate 611

Avoiding hole 611a

Bottom plate 612

Support column 613

Driving member 62

Transmission member 63

Fixed plate 631

Driving rod 632

Robot arm 70

Product 90

Inner cavity 91

Inner wall 91a

First direction Z

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

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 application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "vertical," "horizontal," "left," "right," "top," "bottom," and the like as used herein are for illustrative purposes only and are not intended to limit the present application.

It will be appreciated that when describing the parallel/perpendicular arrangement of two components, the angle between the two components is allowed to have a tolerance of + -10% with respect to standard parallel/perpendicular.

The embodiment of the application provides an internal support device for supporting and fixing a product with an inner cavity. The inner supporting device comprises a supporting shaft extending along the first direction. The internal support device further comprises a connecting piece, a sliding sleeve piece and a plurality of internal support mechanisms. The connecting piece is fixedly connected to one end of the supporting shaft. One end of the connecting piece, which is far away from the supporting shaft, is provided with an adsorption hole which is used for communicating with external vacuum equipment. The sliding sleeve piece is slidably sleeved on the supporting shaft along the first direction. A plurality of internal stay mechanisms are distributed on the periphery of the supporting shaft at intervals. Each internal stay mechanism includes a first link, a second link, and an internal stay. The inner supporting piece is positioned between the connecting piece and the sliding sleeve piece, one end of the first connecting rod is rotatably connected with the connecting piece, the other end of the first connecting rod is rotatably connected with one end of the inner supporting piece, which is adjacent to the connecting piece, one end of the second connecting rod is rotatably connected with the sliding sleeve piece, and the other end of the second connecting rod is rotatably connected with one end of the inner supporting piece, which is adjacent to the sliding sleeve piece. When the inner supporting device stretches into the inner cavity, the adsorption hole forms negative pressure for adsorbing and fixing the inner wall of a product, and the sliding sleeve piece moves relative to the connecting piece so that the first connecting rod and the second connecting rod drive the inner supporting piece to be radially expanded along the supporting shaft and abut against the inner wall of the product.

In the internal supporting device, the inner wall of the product is supported and fixed in multiple directions through the matching of the adsorption holes and the internal supporting piece, so that the product is stably supported and fixed. And, stretch into the inner chamber through the internal stay device and support fixed product, can reduce the risk to the interference of product surface.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, an internal supporting device 100 for supporting and fixing a product 90 having an inner cavity 91 is provided in an embodiment of the present application.

The internal supporting device 100 includes a supporting shaft 10, a connecting member 20, a sliding sleeve member 30, and a plurality of internal supporting mechanisms 40. The support shaft 10 extends along the first direction Z, and the support shaft 10 is used for supporting and connecting the connecting member 20, the sliding sleeve member 30 and the plurality of internal support mechanisms 40. The link 20 is fixedly connected to one end of the support shaft 10. One end of the connecting piece 20 far away from the supporting shaft 10 is provided with a suction hole 20a, and the suction hole 20a is used for communicating with an external vacuum device, so that negative pressure is formed under the action of the external vacuum device. The sliding sleeve member 30 is slidably sleeved on the support shaft 10 along the first direction Z.

The plurality of inner supporting mechanisms 40 are distributed around the supporting shaft 10 at intervals. Each inner support mechanism 40 includes a first link 41, a second link 42, and an inner support 43. The inner support 43 is located between the connecting member 20 and the sliding sleeve member 30. The first link 41 has one end rotatably connected to the link 20 and the other end rotatably connected to one end of the inner stay 43 adjacent to the link 20. The second link 42 has one end rotatably connected to the sliding member 30 and the other end rotatably connected to one end of the inner support 43 adjacent to the sliding member 30.

Referring to fig. 2, when the sliding sleeve 30 slides towards the connecting member 20, the first connecting rod 41 rotates around one end of the connecting member 20, and the other end drives the inner supporting member 43 to move away from the supporting shaft 10 in the radial direction of the supporting shaft 10. Meanwhile, the second link 42 rotates around one end of the connection sliding sleeve member 30, and the other end drives the inner support member 43 to move away from the support shaft 10 in the radial direction of the support shaft 10. The first link 41 and the second link 42 cooperate to drive the inner stay 43 to expand in the radial direction of the support shaft 10.

Referring to fig. 3, when the sliding sleeve 30 slides away from the connecting member 20, the first link 41 rotates around one end of the connecting member 20, and the other end drives the inner supporting member 43 to approach the supporting shaft 10 in the radial direction of the supporting shaft 10. Meanwhile, the second link 42 rotates around one end of the connecting sliding sleeve member 30, and the other end drives the inner supporting member 43 to approach the supporting shaft 10 in the radial direction of the supporting shaft 10. The first link 41 and the second link 42 cooperate to drive the inner stay 43 to contract in the radial direction of the support shaft 10.

In the use process of the internal supporting device 100, at least a part of the internal supporting device 100 extends into the inner cavity 91, and the absorption hole 20a forms negative pressure for absorbing the inner wall 91a of the fixed product 90. The sliding sleeve 30 moves relative to the connecting member 20 (specifically, the sliding sleeve 30 slides towards the connecting member 20), so that the first connecting rod 41 and the second connecting rod 42 drive the inner support 43 to expand along the radial direction of the supporting shaft 10 and abut against the inner wall 91a of the product 90. After the outer surface of the product 90 is processed, the sliding sleeve 30 moves relative to the connecting member 20 (specifically, the sliding sleeve 30 slides away from the connecting member 20), so that the first connecting rod 41 and the second connecting rod 42 drive the inner support member 43 to contract along the radial direction of the supporting shaft 10, so that the inner support device 100 extends out of the inner cavity 91.

In the inner supporting device 100, the suction holes 20a and the inner supporting members 43 are engaged with the inner wall 91a supporting the fixed product 90 in a plurality of directions to stably support the fixed product 90. Moreover, the inner supporting device 100 extends into the inner cavity 91 to support and fix the product 90, so that the risk of interference on the outer surface of the product 90 can be reduced, and the outer surface of the product 90 can be polished conveniently.

Referring to fig. 2 and 3, in some embodiments, the plurality of inner supporting mechanisms 40 are equally spaced and distributed on the periphery of the supporting shaft 10, so that the supporting force of the inner supporting mechanisms 40 on the product 90 is uniformly distributed, and the stability of supporting and fixing is improved. In some embodiments, the number of the inner supporting mechanisms 40 is 3, and the included angle between two adjacent inner supporting mechanisms 40 and the axis of the supporting shaft 10 is 120 °.

Optionally, the number of the inner supporting mechanisms 40 can also be one of 2, 4, 5, 6, and the like.

In some embodiments, the side of the inner strut 43 facing away from the support shaft 10 is provided with a contoured surface 431. The shape-imitating surface 431 is adapted to the inner wall 91a of the product 90, so as to increase the contact area between the shape-imitating surface 431 and the inner wall 91a and improve the stability of the supporting and fixing of the inner support 43.

In some embodiments, the inner wall 91a of the product 90 is spherical and the contoured surface 431 extends in an arc shape that fits the spherical surface.

In some embodiments, the inner wall 91a of the product 90 is planar and the contoured face 431 extends in a planar manner.

In some embodiments, the inner wall 91a of the product 90 is cylindrical and the contoured surface 431 extends in an arc shape that fits the cylindrical surface.

Referring to fig. 4 and 5, in some embodiments, the supporting shaft 10 includes a shaft body 11 and a plurality of supporting portions 12 connected around the shaft body 11 and spaced apart from each other. The shaft body 11 extends in a first direction Z, which is an axial direction of the shaft body 11. In some embodiments, the shaft body 11 is provided with a first end surface 111. The first end surface 111 is concavely provided with a first limit groove 112. The receiving grooves 13 are formed between two adjacent supporting portions 12, the receiving grooves 13 extend along the first direction Z, and each receiving groove 13 is used for receiving a corresponding inner supporting mechanism 40. One end of each support portion 12 adjacent to the first end surface 111 protrudes from the first end surface 111 in the first direction Z so as to abut against the circumferential side of the link 20, improving the stability of the connection between the link 20 and the support shaft 10. In some embodiments, an end of each supporting portion 12 away from the first end surface 111 is provided with a sliding slot 121 for sliding the sliding sleeve 30, and the sliding slot 121 extends toward the connecting member 20 along the first direction Z.

Referring to fig. 6, the connecting member 20 is fixedly connected to one end of the shaft 11. The connector 20 includes a main body 23 and a stopper 21 located at one end of the main body 23. The main body 23 is substantially cylindrical, and the stopper 21 faces the first end surface 111. The peripheral side of the main body 23 abuts against the portion of the support portion 12 extending from the first end surface 111, and the limiting portion 21 is limited and held in the first limiting groove 112 to improve the connection stability between the connecting member 20 and the support shaft 10. The suction hole 20a is provided on the side of the body 23 away from the stopper 21.

In some embodiments, the portion of the main body portion 23 on the peripheral side corresponding to the receiving slot 13 is provided with the first connecting arm set 22. Each first connecting arm set 22 extends into the receiving slot 13 to limit the position of the connecting element 20. Each of the first link arm groups 22 includes two first link arms 221 spaced apart from each other, and one end of the first link 41 is rotatably connected between the two first link arms 221 through a hinge shaft 44.

Referring to fig. 4 again, the sliding sleeve 30 is slidably sleeved on the shaft 11. In some embodiments, the sliding sleeve member 30 is provided with a second connecting arm set 31 near the end-to-end portion corresponding to the receiving groove 13. Each second connecting arm set 31 extends into the receiving slot 13 to limit the sliding direction of the sliding sleeve set 30. Each of the second link arm sets 31 includes two second link arms 311 arranged at intervals, and one end of the second link 42 is rotatably connected between the two second link arms 311 through the hinge shaft 44.

The first connecting arm set 22 and the second connecting arm set 31 are located in the receiving groove 13 to limit the sliding sleeve component 30 from moving along the first direction Z relative to the connecting component 20, so as to reduce the risk of the first connecting rod 41 and the second connecting rod 42 deviating from the inner supporting component 43, and further facilitate the forced rotation of the first connecting rod 41 and the second connecting rod 42.

Specifically, when the internal support mechanism 40 is in the contracted state (see fig. 3), the first link 41, the second link 42 and the internal support 43 are all accommodated in the accommodating groove 13, so that the internal support device 100 extends into the inner cavity 91. When the inner support mechanism 40 is in the expanded state, the first link 41, the second link 42, and the inner support 43 protrude from the accommodating groove 13 so as to support the fixed inner wall 91a.

In some embodiments, the inner support 43 is provided at both ends thereof with a first connecting groove 432 and a second connecting groove 433, respectively, the first link 41 is rotatably connected at one end thereof to the first connecting groove 432 through a hinge shaft 44, and the second link 42 is rotatably connected at one end thereof to the second connecting groove 433 through a hinge shaft 44.

Referring to fig. 4 and 7, in some embodiments, the internal supporting device 100 further includes a first connector 51. The first joint 51 is connected to the shaft body 11 and communicates with one end of the first passage 10a away from the adsorption hole 20a, so as to facilitate a sealing connection between the first passage 10a and an external vacuum device.

In some embodiments, the internal stay device 100 further includes a second joint 52. The second joint 52 is provided at a junction of the first passage 10a and the adsorption hole 20a, for improving communication stability of the first passage 10a and the adsorption hole 20 a.

In some embodiments, the internal support device 100 further comprises a suction cup 53,. The suction cup 53 is disposed in the suction hole 20a and communicates with the second joint 52 to improve the stability of suction.

Referring again to fig. 2, in some embodiments, the internal stay device 100 further includes a connecting frame 61 and a driving member 62. One end of the support shaft 10 away from the connecting member 20 is fixedly connected to the connecting frame 61, the driving member 62 is fixedly connected to the connecting frame 61 and is in transmission connection with the sliding sleeve member 30, and the driving member 62 is used for driving the sliding sleeve member 30 to slide.

Specifically, the connecting frame 61 includes a support plate 611, a bottom plate 612, and a support column 613. The support plate 611 and the base plate 612 are spaced apart in the first direction Z, and the support column 613 is supportingly coupled between the support plate 611 and the base plate 612. The end of the supporting shaft 10 away from the connecting member 20 is fixedly connected to the side of the supporting column 613 away from the base plate 612, and the driving member 62 is connected to the side of the base plate 612 facing the supporting plate 611.

In some embodiments, the internal supporting device 100 further comprises a transmission member 63, wherein the transmission member 63 is connected between the driving member 62 and the sliding sleeve member 30, so as to drivingly connect the driving member 62 and the sliding sleeve member 30. Specifically, the transmission member 63 includes a fixed plate 631 and transmission rods 632 spaced apart on both sides of the fixed plate 631. The fixing plate 631 is located between the supporting plate 611 and the bottom plate 612, and the transmission member 63 is drivingly connected to the fixing plate 631. Each of the transmission levers 632 extends from the fixing plate 631 in the first direction Z toward the slider member 30 and passes through the support plate 611, and the two transmission levers 632 are connected to both sides of the slider member 30 at intervals. The driving member 62 drives the fixed plate 631 and the transmission rod 632 to move along the first direction Z, and further drives the sliding member 30 to move along the first direction Z. The stability of the transmission can be increased by the two transmission rods 632.

In some embodiments, the support plate 611 is provided with an escape hole 611a corresponding to the transmission rod 632, and the transmission rod 632 passes through the escape hole 611a to be connected to the sliding sleeve member 30.

Referring again to fig. 1, in some embodiments, the internal bracing apparatus 100 further comprises a robotic arm 70. The mechanical arm 70 is connected to the connecting frame 61, and is used for driving the connecting frame 61 to move, and the supporting shaft 10, the connecting member 20, the sliding sleeve member 30 and the plurality of internal supporting mechanisms 40 to move synchronously, so as to drive the product 90 to move conveniently.

In summary, in the inner supporting device 100, the suction holes 20a and the inner supporting members 43 are engaged with the inner wall 91a supporting the fixed product 90 in multiple directions, so as to stably support the fixed product 90. Moreover, the inner supporting device 100 extends into the inner cavity 91 to support and fix the product 90, so that the risk of interference on the outer surface of the product 90 can be reduced, and the outer surface of the product 90 can be polished conveniently.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications to the above embodiments are within the scope of the present disclosure as long as they are within the spirit and scope of the present application.

Claims (10)

1. The utility model provides an internal stay device for support fixed product that has an inner chamber, internal stay device includes the back shaft that extends the setting along first direction, its characterized in that: the internal stay device still includes:

the connecting piece is fixedly connected to one end of the supporting shaft, and one end, far away from the supporting shaft, of the connecting piece is provided with an adsorption hole which is used for being communicated with external vacuum equipment;

the sliding sleeve piece is slidably sleeved on the supporting shaft along the first direction;

the inner supporting mechanisms are distributed on the periphery of the supporting shaft at intervals, each inner supporting mechanism comprises a first connecting rod, a second connecting rod and an inner supporting piece, the inner supporting pieces are located between the connecting pieces and the sliding sleeve pieces, one end of each first connecting rod is rotatably connected with the connecting piece, the other end of each first connecting rod is rotatably connected with one end, close to the connecting piece, of each inner supporting piece, one end of each second connecting rod is rotatably connected with the sliding sleeve piece, and the other end of each second connecting rod is rotatably connected with one end, close to the sliding sleeve piece, of each inner supporting piece;

when the inner supporting device extends into the inner cavity, the adsorption hole forms negative pressure for adsorbing and fixing the inner wall of the product, and the sliding sleeve piece moves relative to the connecting piece so that the first connecting rod and the second connecting rod drive the inner supporting piece to be radially supported along the supporting shaft and abut against the inner wall of the product.

2. The internal stay device of claim 1, wherein: a plurality of the internal stay mechanism is equidistantly distributed on the peripheral side of the supporting shaft.

3. The internal stay device of claim 1 or 2, wherein: the back shaft includes the axis body and encircles connect in a plurality of supporting parts of axis body week side and interval arrangement, connecting piece fixed connection in axis body one end, smooth external member cup joint with slidable in the axis body, adjacent two form the holding tank between the supporting part, each internal stay mechanism locates in the holding tank.

4. The internal stay device of claim 3, wherein: the axis body is equipped with first terminal surface, the connecting piece connect in first terminal surface, each the supporting part is close to the one end of first terminal surface is followed first direction stretches out first terminal surface and butt connecting piece week side.

5. The internal stay device of claim 4, wherein: one end, far away from the first end face, of each supporting portion is provided with a sliding groove for the sliding of the sliding sleeve piece, and the sliding groove extends towards the connecting piece along the first direction.

6. The internal stay device of claim 4 wherein: the first end face is concavely provided with a first limiting groove, one side, away from the adsorption hole, of the connecting piece is provided with a limiting part, and the limiting part is clamped in the first limiting groove in a limiting mode.

7. The internal stay device of claim 1, wherein: and a profiling surface is arranged on one side of the inner supporting piece, which deviates from the supporting shaft, and is used for being matched with the inner wall of the product.

8. The internal stay device of claim 1, wherein: the back shaft is provided with a first channel, one end of the first channel is communicated with the adsorption hole, and the other end of the first channel is communicated with external vacuum equipment.

9. The internal stay device of claim 1, wherein: the inner supporting device further comprises a connecting frame and a driving piece, the supporting shaft is far away from one end of the connecting piece and fixedly connected with the connecting frame, and the driving piece is fixedly connected with the connecting frame and is in transmission connection with the sliding sleeve piece.

10. The internal stay device of claim 9, wherein: the inner supporting device further comprises a mechanical arm, and the mechanical arm is connected with the connecting frame and used for driving the connecting frame to move.

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