CN113954008B

CN113954008B - Upper carrier with jacking function

Info

Publication number: CN113954008B
Application number: CN202111345420.XA
Authority: CN
Inventors: 陈灿华; 邓春华; 赵杨国; 周海涛
Original assignee: World Precision Manufacturing Dongguan Co Ltd
Current assignee: Guangdong Ward Precision Technology Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-11-08
Anticipated expiration: 2041-11-12
Also published as: CN113954008A

Abstract

The invention discloses an upper carrier with a jacking function, which comprises a carrier body, a jacking column and a jacking linkage mechanism for driving the jacking column to stretch out and contract, wherein an accommodating cavity is arranged in the carrier body, the jacking column and the jacking linkage mechanism are arranged in the accommodating cavity, the jacking columns are multiple and are respectively arranged on the periphery of the bottom surface of the carrier body, the jacking column can stretch out and draw back along the vertical direction, the jacking column is provided with a first position which is retracted into the accommodating cavity and a second position which stretches out of the bottom surface of the carrier body downwards, the jacking linkage mechanism is positioned in the middle of the accommodating cavity, and the jacking linkage mechanism is used for linking the jacking column to be switched between the first position and the second position. Compared with the prior art, the upper carrier with the jacking function has the advantages that by means of the jacking column and the jacking linkage mechanism, under the linkage action of the jacking linkage mechanism, the jacking column can be switched between the first position retracted into the accommodating cavity and the second position extending downwards out of the bottom surface of the carrier body, so that the upper carrier can be suitable for state change on an assembly line.

Description

Upper carrier with jacking function

Technical Field

The invention relates to the field of tablet personal computer assembling equipment, in particular to an upper carrier with a jacking function.

Background

With the development of science and technology and the advancement of humanity, the tablet personal computer is increasingly popular with consumers in recent years due to the portability similar to a mobile phone and the strong function similar to a computer.

In the assembly process of the tablet computer, one process is required to assemble the glass panel on the middle frame. However, the glass panel is not immediately attached to the middle frame after reaching the middle frame, and the glass panel and the middle frame can be attached to each other only after processes such as wire burying and the like are finished.

In the existing assembly line, an upper carrier corresponding to a glass panel is arranged, and a lower carrier corresponding to a middle frame is arranged. Generally, before the glass panel and the middle frame are completely assembled, the glass panel is assembled on the upper carrier, and the middle frame is assembled on the lower carrier; and then, the glass panel is required to be supported above the middle frame, other assembling procedures are firstly completed, and then the glass panel is assembled on the middle frame in a fitting manner. In the prior art, an external mechanism is usually required to support the glass panel on the middle frame, so that the assembly line is too high in manufacturing cost and complicated in structure.

However, in the prior art, there is no way to temporarily install a jacking mechanism in the upper carrier or the lower carrier so that the upper carrier and the glass panel can be lifted and lowered relative to the lower carrier to satisfy different conditions.

Therefore, there is a need for a lift-up upper carrier capable of ascending and descending relative to a lower carrier to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide an upper carrier with a jacking function, which can be relatively lowered and can be lifted and lowered.

In order to achieve the above object, the upper carrier with a jacking function of the present invention includes a carrier body, a jacking column and a jacking linkage mechanism for driving the jacking column to extend and contract, wherein a receiving cavity is provided in the carrier body, the jacking column and the jacking linkage mechanism are provided in the receiving cavity, the jacking columns are provided in a plurality and respectively provided around the bottom surface of the carrier body, the jacking column can extend and retract in the up-down direction, the jacking column has a first position retracted into the receiving cavity and a second position extending downward from the bottom surface of the carrier body, the jacking linkage mechanism is located in the middle of the receiving cavity, and the jacking linkage mechanism links the jacking column to switch between the first position and the second position.

Compared with the prior art, the upper carrier with the jacking function has the advantages that by means of the jacking column and the jacking linkage mechanism, under the linkage action of the jacking linkage mechanism, the jacking column can be switched between the first position retracted into the containing cavity and the second position extending downwards out of the bottom surface of the carrier body, so that the upper carrier can be suitable for state change on an assembly line.

Preferably, the jacking linkage mechanism comprises a pivoting center block and a plurality of linkage rods, the pivoting center block is located in the accommodating cavity and can rotate around a vertically arranged pivoting center line, the linkage rods are respectively arranged on the periphery of the pivoting center block and abut against the outer side face of the pivoting center block, the linkage rods are arranged in a sliding manner along the length direction of the linkage rods, the length direction of the linkage rods is the radial direction passing through the center of the pivoting center block, and the rotation of the pivoting center block drives the linkage rods to slide; the bottom surface of the tail end of the linkage rod is in abutting connection with the top surface of the jacking column, and the movement of the linkage rod drives the jacking column to do telescopic motion in the vertical direction; when the linkage rod moves in the direction away from the pivoting central block, the linkage rod is linked with the jacking column to extend downwards to the second position; when the linkage rod moves along the direction close to the pivoting center block, the linkage rod links the jacking column to retract upwards and inwards to the first position.

Preferably, a plurality of slide rails are fixedly arranged in the accommodating cavity, the slide rails are located below the linkage rods in a one-to-one correspondence manner, a slide block is connected below the linkage rods, and the linkage rods are slidably arranged on the slide rails through the slide block so as to slide relative to the carrier body.

Preferably, the jacking linkage mechanism further includes a first elastic member, one end of the first elastic member is fixedly disposed on the accommodating cavity, the other end of the first elastic member is connected to the linkage rod, and the first elastic member constantly has a tendency of driving the linkage rod to move in a direction close to the pivot center block, so that the jacking column constantly retracts to the first position.

Preferably, the bottom surface of the tail end of the linkage rod is an inclined surface, the left side and the right side of the inclined surface are respectively adjacent to a plane, the inclined surface is arranged from high to low along the direction close to the pivot center block, and the top surface of the jacking column is in rolling contact with the inclined surface.

Preferably, the jacking column comprises a jacking column body, a first roller and a roller, the first roller is sleeved on the roller in a rolling manner, the roller is horizontally connected to the top of the jacking column body, and an avoiding space for the first roller to be arranged is arranged at the top of the jacking column body.

Preferably, the lifting column further comprises a second elastic member, the second elastic member is sleeved on the lifting column body, and the second elastic member constantly has a tendency of driving the lifting column to move upwards so as to be located at the first position.

Preferably, the outer side surface of the pivot center block is an arc concave surface and an arc convex surface which are alternately arranged, and the arc concave surface and the arc convex surface are centrosymmetrically distributed around the pivot center line; the jacking linkage mechanism further comprises a self-locking assembly, the self-locking assembly is arranged between two adjacent linkage rods, and the outer side surface of the self-locking assembly abuts against the arc-shaped convex surface or the arc-shaped concave surface; when the linkage rod is abutted against the arc-shaped convex surface, the self-locking assembly is abutted against the arc-shaped concave surface; when the linkage rod is abutted against the arc-shaped concave surface, the self-locking assembly is abutted against the arc-shaped convex surface.

Preferably, the self-locking assembly includes a third roller, a guide post, a connecting block, a third elastic member and a fixing seat, the fixing seat is fixedly located in the accommodating cavity, the guide post penetrates through the fixing seat and can slide relative to the fixing seat, one end of the guide post is fixedly connected with the connecting block, the third elastic member is sleeved on the guide post, the third elastic member is abutted between the fixing seat and the connecting block, the third roller is pivoted on the connecting block, the third roller is arranged in a rolling manner around a vertical pivot center line, and the third roller is abutted against the arc-shaped convex surface or the arc-shaped concave surface in a rolling manner.

Preferably, the included angle between the central lines of the two adjacent arc-shaped concave surfaces is 90 °, the included angle between the central lines of the two adjacent arc-shaped convex surfaces is 90 °, and the included angle between the central lines of the two adjacent arc-shaped convex surfaces and the central line of the arc-shaped concave surface is 45 °.

Drawings

Fig. 1 is a schematic view of a vertical structure in which an upper carrier and a lower carrier having a jacking function are spaced apart from each other in an up-down direction according to the present invention.

Fig. 2 is a schematic view of a three-dimensional structure of the upper carrier and the lower carrier with jacking function of the present invention after they are tightly adhered along the up-down direction.

Fig. 3 isbase:Sub>A sectional view taken along section linebase:Sub>A-base:Sub>A in fig. 2.

Fig. 4 is an enlarged schematic view at B in fig. 3.

Fig. 5 is a schematic top view of the top carrier with a jacking function with the top surface hidden according to the present invention.

Fig. 6 is a schematic perspective view of a jacking linkage mechanism of the upper carrier with jacking function according to the present invention.

Fig. 7 is a schematic perspective view of another viewing angle of the jacking linkage mechanism of the upper carrier with jacking function according to the present invention.

Fig. 8 is an enlarged schematic view at C in fig. 6.

Fig. 9 is a schematic perspective view of the self-locking assembly of the jacking linkage mechanism of the upper carrier with jacking function according to the present invention.

Fig. 10 is a schematic perspective view of a vacuum apparatus of an upper carrier with a jacking function according to the present invention.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

Referring to fig. 1 to 2, a state that the upper carrier 100 with a jacking function is spaced from and attached to the corresponding lower carrier 200 along the vertical direction is shown. It can be understood that the bottom surface of the upper carrier 100 is used for bearing the glass panel, the lower carrier 200 is used for bearing the middle frame, and when the upper carrier 200 and the lower carrier 200 are tightly attached, the glass panel is assembled on the middle frame; before the assembly of the glass panel and the middle frame, the upper carrier 100 of the present invention has a jacking function and is supported on the lower carrier 200, so as to perform other processes.

Referring to fig. 2 to 4, the upper carrier 100 with a jacking function of the present invention includes a carrier body 1, a jacking post 2, and a jacking linkage mechanism 3 for driving the jacking post 2 to extend and retract. The carrier body 1 is internally provided with an accommodating cavity 11, the jacking columns 2 and the jacking linkage mechanisms 3 are arranged in the accommodating cavity 11, the jacking columns 2 are multiple and are respectively arranged on the periphery of the bottom surface of the carrier body 1, the jacking columns 2 can stretch along the vertical direction, the jacking columns 2 are provided with first positions which retract in the accommodating cavity 11 and second positions which stretch out of the bottom surface of the carrier body 1, the jacking linkage mechanisms 3 are positioned in the middle of the accommodating cavity 11, and the jacking columns 2 are linked by the jacking linkage mechanisms 3 and are switched between the first positions and the second positions.

Referring to fig. 1, 3 and 4, the lower carrier 200 has a positioning pin 201 disposed opposite to the lifting column 2, and a groove 202 for supporting the lifting column 2 is disposed at the top of the positioning pin 201. When the lifting column 2 is in the second position, the lifting column 2 is supported in the groove 202.

Referring to fig. 5 and 6, the lifting linkage mechanism 3 includes a pivot center block 31 and a linkage rod 32. The pivot center blocks 31 are located in the accommodating cavities 11, the pivot center blocks 31 can rotate around a vertically arranged pivot center line, and the number of the linkage rods 32 is four, and the linkage rods are respectively arranged on the periphery of the pivot center blocks 31 and are abutted against the outer side faces of the pivot center blocks 31. It is understood that, in other embodiments, the number of the linkage bars 32 may be three, five or six, and therefore, the invention is not limited thereto. The linkage rod 32 is arranged in a sliding manner along the length direction of the linkage rod, the length direction of the linkage rod 32 is the radial direction passing through the center of the pivot center block 31, and the linkage rod 32 is driven to slide by the rotation of the pivot center block 31. The bottom surface of the end of the linkage rod 32 is connected with the top surface of the jacking column 2 in an abutting mode, and the movement of the linkage rod 32 drives the jacking column 2 to do telescopic motion in the vertical direction. When the linkage lever 32 moves in a direction away from the pivot central block 31, the linkage lever 32 links the lifting column 2 to extend downwards to a second position; when the linkage 32 moves in a direction approaching the pivot center block 31, the linkage 32 moves the lifting column 2 to retract upward and inward to the first position. Preferably, in the embodiment, the pivot center block 31 only needs to rotate along one direction to link the linkage rod 32 to extend and retract so as to move the jacking column 2 between the first position and the second position, so that the switching time of the power source does not need to be waited, and the influence of the torque on the pivot center block 31 is reduced; of course, in other embodiments, the pivot center block 31 needs to be rotated to move the linkage rod 32 to extend and retract so that the lifting column 2 moves between the first position and the second position.

Referring to fig. 7, a plurality of slide rails 41 are fixedly disposed in the accommodating cavity 11, the slide rails 41 are disposed below the linkage rod 32 in a one-to-one correspondence manner, a slider 42 is connected below the linkage rod 32, and the linkage rod 32 is slidably disposed on the slide rails 41 through the slider 42 to slide relative to the carrier body 1. By means of the sliding block 42 and the sliding rail 41, the linkage 32 can slide, and a guiding function is provided for the sliding of the linkage 32, so that the stability and the reliability of the sliding of the linkage 32 are ensured.

Referring to fig. 6 to 8, the lifting linkage mechanism 3 further includes a first elastic member 33, one end of the first elastic member 33 is fixedly disposed on the bottom wall of the accommodating cavity 11, the other end of the first elastic member 33 is connected to the linkage rod 32, and the first elastic member 33 constantly has a tendency to drive the linkage rod 32 to move along a direction close to the pivot center block 31, so that the lifting column 2 is constantly retracted to the first position. That is, when the pivot center block 31 is driven to rotate without an external force, the first elastic member 33 constantly drives the linkage 32 to approach the pivot center block 31, so that the jacking pillars 2 are retracted.

Referring to fig. 4, 6 to 8, the bottom surface of the end of the linking rod 32 is an inclined surface 321, the left and right sides of the inclined surface 321 are respectively adjacent to a plane 322, the inclined surface 321 is disposed from high to low along the direction close to the pivot center block 31, and the top surface of the lifting column 2 is in rolling contact with the inclined surface 321. Therefore, when the linkage 32 slides in a direction away from the pivot center block 31, the inclined surface 321 presses against the top surface of the lifting column 2, and the lifting column 2 is pressed to descend. When the linkage 32 approaches the pivot center block 31, the inclined surface 321 leaves the gradually lifting column 2, the lifting column 2 finally abuts against the plane 322, and the lifting column 2 is lifted to the first position. Specifically, the jacking column 2 includes a jacking column body 21, a first roller 22 and a roller 23. The first roller 22 is sleeved on the roller 23 in a rolling manner, the roller 23 is horizontally connected to the top of the jacking column body 21, and an avoiding space 24 for the first roller 22 to be arranged is arranged at the top of the jacking column body 21. With the first roller 22, when the slope 321 presses the jack-up post 2, the first roller 22 rolls on the slope 321, thereby reducing friction. The jacking post 2 further comprises a second elastic member 25, the second elastic member 25 is sleeved on the jacking post body 21, and the second elastic member 25 constantly has a tendency of driving the jacking post 2 to move upwards so as to be located at the first position. With the aid of the second elastic member 25, initially, the second elastic member 25 drives the jacking-post 2 to be at the first position, when the jacking-post 2 is linked by the linking rod 32 to descend to the second position, the second elastic member 25 is pressed, and when the inclined surface 321 is away from the top surface of the jacking-post 2, the second elastic member 25 resets to drive the jacking-post 2 to move upward to the first position.

Referring to fig. 5 and 6, the outer side surface of the pivot center block 31 is provided with arc concave surfaces 311 and arc convex surfaces 312 which are alternately arranged, and the arc concave surfaces 311 and the arc convex surfaces 312 are distributed around the pivot center line in a central symmetry manner. With the alternating arrangement of the arc concave 311 and the arc convex 312, when the linking rod 32 contacts the arc concave 311, the linking rod 32 moves towards the direction close to the pivot center block 31, so as to link the lifting column 2 to lift; when the linkage 32 contacts the arc-shaped convex surface 312, the linkage 32 is pushed away from the pivot central block 31, thereby linking the lifting column 2 to descend. The jacking linkage mechanism 3 further comprises a self-locking assembly 34, the self-locking assembly 34 is arranged between two adjacent linkage rods 32, and the outer side surface of the self-locking assembly 34 abuts against the arc-shaped convex surface 312 or the arc-shaped concave surface 311; when the linkage rod 32 abuts against the arc-shaped convex surface 312, the self-locking component 34 abuts against the arc-shaped concave surface 311; when the linking rod 32 abuts against the arc-shaped concave surface 311, the self-locking assembly 34 abuts against the arc-shaped convex surface 312. Preferably, with the arc concave 311, when the linkage 32 is located in the concave, if the power source for rotating the pivot center block 31 is removed, the arc concave 311 locks the current position of the linkage 32 and cannot slide, so as to lock the current position of the lifting column 2, i.e. the first position. When unlocking is required, the power for pivoting the pivot center block 31 can enable the linkage 32 to be switched from the contact of the arc concave surface 311 to the contact of the arc convex surface 312. When the self-locking assembly 34 is located in the concave surface, if the power source for rotating the pivot center block 31 is removed, the arc-shaped concave surface 311 locks the current position of the self-locking assembly 34 and cannot slide, so that the current position of the jacking column 2, namely the second position, is locked. When unlocking is required, the self-locking assembly 34 can be switched from the contact of the arc concave surface 311 to the contact of the arc convex surface 312 by the power for pivoting the pivot center block 31. Therefore, the arc convex surface 312 and the arc concave surface 311 are alternately arranged, so that the purpose of self-locking can be achieved. In addition, the pivot center block 31 can link the linkage rod 32 to slide only by keeping intermittent rotation in one direction without reversing rotation, so that the stability of the power source can be kept, and the problem of life reduction caused by torque is avoided.

Referring to fig. 6, the head end of the linking rod 32 is connected to the second roller 323, the second roller 323 is disposed in a rolling manner around a vertical pivot line, and the second roller 323 contacts against the arc-shaped concave surface 311 or the arc-shaped convex surface 312 in a rolling manner. The position of the linkage 32 can be switched conveniently and rapidly by the second roller 323.

Referring to fig. 9, the self-locking assembly 34 includes a third roller 341, a guiding column 342, a connecting block 343, a third elastic member 344, and a fixing seat 345. The fixing base 345 is fixedly located in the accommodating cavity 11, the guiding post 342 penetrates through the fixing base 345 and can slide relative to the fixing base 345, one end of the guiding post 342 is fixedly connected with the connecting block 343, the third elastic member 344 is sleeved on the guiding post 342, the third elastic member 344 abuts between the fixing base 345 and the connecting block 343, the third roller 341 is pivoted on the connecting block 343, the third roller 341 is arranged in a rolling manner around a vertical pivot center line, and the third roller 341 abuts against the arc-shaped convex surface 312 or the arc-shaped concave surface 311 in a rolling manner. The self-locking assembly 34 can be switched conveniently and rapidly by the third roller 341. By virtue of the slidable guide column 342, the guide column 342 can slide when the third roller 341 switches between the arc-shaped convex surface 312 and the arc-shaped concave surface 311. By means of the third elastic member 344, the guide column 342 is constantly made to have a tendency to approach the pivot center block 31, when the third roller 341 contacts the arc-shaped convex surface 312, the guide column 342 moves in a direction away from the pivot center block 31, and the third elastic member 344 is also compressed to accumulate elastic potential energy; when the third roller 341 contacts the arc-shaped concave surface 311, the third elastic member 344 drives the guide post 342 to move toward the pivot center block 31, so that the third roller 341 is locked in the arc-shaped concave surface 311.

Referring to fig. 5 and 6, an included angle between the center lines of two adjacent curved concave surfaces 311 is 90 °, an included angle between the center lines of two adjacent curved convex surfaces 312 is 90 °, and an included angle α between the center lines of two adjacent curved convex surfaces 312 and the center line of curved concave surface 311 is 45 °. That is, the pivot center block 31 is turned 45 degrees to switch and lock the current position of the jack-up post 2. Of course, in other embodiments, the included angle α between the center line passing through two adjacent arc convex surfaces 312 and the center line passing through the arc concave surface 311 may be 30 °, 36 °, 60 °, 90 °, and is not limited thereto.

Referring to fig. 5 and 10, the upper carrier 100 with a lifting function further includes four vacuum devices 5, and the four vacuum devices 5 are disposed in the receiving cavity 11. A vacuum device 5 is disposed between two adjacent linkage bars 32. Specifically, the linkage rods 32 are respectively arranged in the front, the back, the left and the right, and the vacuum devices 5 are respectively positioned in the southeast, the northeast, the southwest and the northwest directions of the accommodating cavity 11. The space layout enables the structure to be more compact and saves more space for accommodating the cavity 11. The glass panel is thus sucked at the bottom surface by means of the vacuum device 5.

The operation principle of the upper carrier 100 with the lifting function according to the present invention will be described with reference to the accompanying drawings: if the initial position of the lifting column 2 is protruded from the bottom surface of the carrier body 1, the pivot center block 31 rotates 45 °, the linkage rod 32 rolls from the collision of the arc convex surface 312 to the collision of the arc concave surface 311, the linkage rod 32 moves towards the direction close to the pivot center block 31 and is locked at the position, and after the inclined surface 321 at the tail end of the linkage rod 32 leaves the collision pressure on the lifting column 2, the lifting column 2 resets under the action of the second elastic member 25 and moves upwards, so as to be retracted into the accommodating cavity 11; when the jacking column 2 needs to be switched from the first position to the second position, the pivoting center block 31 rotates 45 degrees, the linkage rod 32 is switched from the contact of the arc-shaped concave surface 311 to the contact of the arc-shaped convex surface 312, the linkage rod 32 slides along the direction far away from the pivoting center block 31, the inclined surface 321 at the tail end of the linkage rod 32 presses against the jacking column 2, and therefore the jacking column 2 moves downwards to the second position; meanwhile, the self-locking assembly 34 contacts the arc concave 311 to lock the position of the linkage 32.

Compared with the prior art, the upper carrier 100 with the jacking function of the invention utilizes the jacking column 2 and the jacking linkage mechanism 3, and under the linkage action of the jacking linkage mechanism 3, the jacking column 2 can be switched between a first position retracted in the accommodating cavity 11 and a second position extending downwards out of the bottom surface of the carrier body 1, so that the upper carrier 100 can be suitable for the state change on an assembly line.

The above disclosure is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, so that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.

Claims

1. An upper carrier with a jacking function is characterized by comprising a carrier body, a jacking column and a jacking linkage mechanism for driving the jacking column to stretch out and contract, wherein an accommodating cavity is formed in the carrier body, the jacking column and the jacking linkage mechanism are arranged in the accommodating cavity, the jacking columns are multiple and are respectively arranged on the periphery of the bottom surface of the carrier body, the jacking column can stretch out and draw back along the up-down direction, the jacking column is provided with a first position retracted into the accommodating cavity and a second position extending out of the bottom surface of the carrier body downwards, the jacking linkage mechanism is positioned in the middle of the accommodating cavity, and the jacking linkage mechanism is used for linking the jacking column to switch between the first position and the second position; the jacking linkage mechanism comprises a pivoting center block and a plurality of linkage rods, the pivoting center block can rotate around a vertically arranged pivoting center line, the linkage rods are respectively arranged on the periphery of the pivoting center block and abut against the outer side face of the pivoting center block, the linkage rods are arranged in a sliding manner along the length direction of the linkage rods, and the rotation of the pivoting center block drives the linkage rods to slide; the bottom surface of the tail end of the linkage rod is in abutting connection with the top surface of the jacking column, and the linkage rod moves to drive the jacking column to do telescopic motion in the vertical direction.

2. The upper carrier with the jacking function according to claim 1, wherein the pivot center block is located in the accommodating cavity, and the length direction of the linkage rod is a radial direction passing through the center of the pivot center block; when the linkage rod moves in the direction away from the pivoting central block, the linkage rod is linked with the jacking column to extend downwards to the second position; when the linkage rod moves along the direction close to the pivot center block, the linkage rod links the jacking column to retract upwards to the first position.

3. The upper carrier with the jacking function as claimed in claim 1, wherein a plurality of slide rails are fixed in the accommodating cavity, the slide rails are correspondingly located below the linkage rods, a slide block is connected below the linkage rods, and the linkage rods are slidably located on the slide rails through the slide blocks so as to slide relative to the carrier body.

4. The upper carrier with the jacking function as claimed in claim 1, wherein the jacking linkage mechanism further comprises a first elastic member, one end of the first elastic member is fixedly disposed on the accommodating cavity, the other end of the first elastic member is connected to the linkage rod, and the first elastic member has a tendency to drive the linkage rod to move along a direction close to the pivot center block, so that the jacking column is retracted to the first position.

5. The upper carrier with the jacking function as claimed in claim 1, wherein the bottom surface of the end of the linkage is an inclined surface, the left and right sides of the inclined surface are respectively adjacent to a plane, the inclined surface is arranged from high to low along the direction close to the pivot center block, and the top surface of the jacking pillar is in rolling contact with the inclined surface.

6. The upper carrier with the jacking function as claimed in claim 5, wherein the jacking column includes a jacking column body, a first roller and a roller, the first roller is rotatably sleeved on the roller, the roller is horizontally connected to the top of the jacking column body, and an avoiding space for the first roller to be disposed is disposed at the top of the jacking column body.

7. The upper carrier with jacking function as claimed in claim 6, wherein the jacking-post further comprises a second elastic member, the second elastic member is sleeved on the jacking-post body, and the second elastic member has a tendency to urge the jacking-post to move upwards to be in the first position.

8. The upper carrier with the jacking function according to claim 1, wherein the outer side surfaces of the pivot center block are arc-shaped concave surfaces and arc-shaped convex surfaces which are alternately arranged, and the arc-shaped concave surfaces and the arc-shaped convex surfaces are distributed in central symmetry around the pivot center line; the jacking linkage mechanism further comprises a self-locking assembly, the self-locking assembly is arranged between two adjacent linkage rods, and the outer side surface of the self-locking assembly abuts against the arc-shaped convex surface or the arc-shaped concave surface; when the linkage rod abuts against the arc-shaped convex surface, the self-locking assembly abuts against the arc-shaped concave surface; when the linkage rod is abutted against the arc-shaped concave surface, the self-locking assembly is abutted against the arc-shaped convex surface.

9. The upper carrier with the jacking function according to claim 8, wherein the self-locking assembly comprises a third roller, a guide post, a connecting block, a third elastic member and a fixing seat, the fixing seat is fixedly located in the accommodating cavity, the guide post is arranged on the fixing seat in a penetrating manner and can slide relative to the fixing seat, one end of the guide post is fixedly connected with the connecting block, the third elastic member is sleeved on the guide post, the third elastic member abuts between the fixing seat and the connecting block, the third roller is pivoted on the connecting block, the third roller is arranged in a rolling manner around a vertical pivoting center line, and the third roller is in rolling contact with the arc-shaped convex surface or the arc-shaped concave surface.

10. The upper carrier with the jacking function as claimed in claim 8, wherein an included angle between the center lines of two adjacent arc-shaped concave surfaces is 90 °, an included angle between the center lines of two adjacent arc-shaped convex surfaces is 90 °, and an included angle between the center lines of two adjacent arc-shaped convex surfaces and the center line of arc-shaped concave surface is 45 °.