CN211951175U

CN211951175U - Screw type switching pivot device

Info

Publication number: CN211951175U
Application number: CN202020468446.8U
Authority: CN
Inventors: 刘杰
Original assignee: Xinliangang Electronic Technology Chongqing Co ltd
Current assignee: Xinliangang Electronic Technology Chongqing Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-11-17
Anticipated expiration: 2030-04-02

Abstract

The utility model discloses a screw type switching pivot device, which comprises a first pivot, a second pivot, a limiting component and a torsion component; the first pivot is provided with a first shaft limiting and guiding section, and the outer surface of the first shaft limiting and guiding section is provided with a first shaft limiting and guiding groove; a second shaft limiting guide section is arranged on the second pivot, and a second shaft limiting guide groove is formed in the outer surface of the second shaft limiting guide section; the limiting assembly comprises a limiting connecting seat, the limiting connecting seat is provided with a limiting guide rod, a limiting sliding block is connected onto the limiting guide rod, and the upper end and the lower end of the limiting sliding block are simultaneously abutted to the groove bottom of the first shaft limiting guide groove and the groove bottom of the second shaft limiting guide groove respectively; the torsion assembly can be in interference fit with the first pivot and the second pivot. The utility model discloses a cooperation between spacing sliding block and the spacing direction recess of primary shaft and the spacing direction recess of secondary shaft can carry out the multistage formula to primary shaft and secondary shaft and switch the rotation and rotate the large-angle rotation work in order to realize this pivot ware.

Description

Screw type switching pivot device

Technical Field

The utility model belongs to the technical field of the electronic equipment mechanical technique and specifically relates to a pivot ware is switched to screw.

Background

In an existing electronic device, for example, a notebook computer, a screen end that can be opened and closed relative to a system end is usually designed on the system end, so that the screen end can be opened when the electronic device is in a working state, and the screen end can be closed when the electronic device is stored and carried. To accomplish the above operations, for example, a notebook computer is taken as an example, a dual-axis pivot device is used to connect the system end and the display end, but the existing dual-axis pivot device has the following disadvantages: 1. the existing double-shaft pivot device can generate double-shaft displacement change in the process of turning over to 360 degrees from a closed state, and particularly when the existing double-shaft pivot device is turned over to about 180 degrees, the whole pivot device can protrude out of the surface of a notebook computer, so that the notebook computer is difficult to be flatly placed on a desktop. 2. In the conventional dual-axis pivot device, a plurality of interlocking components are usually provided to perform switching operation in order to complete the turning of 0 ° to 360 °, which complicates the components and further affects the stability of the operation of the entire pivot device.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's above-mentioned problem, providing the screw switches pivot ware, through spacing sliding block and the spacing direction recess of primary shaft and the spacing direction recess of secondary shaft between cooperation (slip and put into), can carry out the multistage formula to primary shaft and secondary shaft and switch the rotation and rotate the wide-angle rotation work in order to realize this pivot ware.

The purpose of the utility model is mainly realized through the following technical scheme:

the screw type switching pivot device comprises a first pivot, a second pivot arranged in parallel with the first pivot, a limiting component and a torsion component;

the first pivot is provided with a first shaft limiting and guiding section, and the outer surface of the first shaft limiting and guiding section is axially provided with a first shaft limiting and guiding groove;

a second shaft limiting guide section is arranged on the second pivot, and a second shaft limiting guide groove is axially arranged on the outer surface of the second shaft limiting guide section;

the limiting assembly comprises a limiting connecting seat, the upper end and the lower end of the limiting connecting seat are respectively connected to the first pivot and the second pivot, the limiting connecting seat is provided with a limiting guide rod arranged in parallel with the first pivot, a limiting sliding block is connected onto the limiting guide rod, and the upper end and the lower end of the limiting sliding block are simultaneously abutted to the groove bottom of the first shaft limiting guide groove and the groove bottom of the second shaft limiting guide groove respectively;

when the first pivot is rotated and the second pivot is still, the first shaft limiting guide groove can drive the limiting sliding block to axially move relative to the limiting guide rod along the second shaft limiting guide groove;

when the second pivot is rotated and the first pivot is static, the second shaft limit guide groove can drive the limit sliding block to axially move relative to the limit guide rod along the first shaft limit guide groove;

the torsion assembly can be in interference fit with the first pivot and the second pivot.

The utility model discloses in, when rotating first pivot or second pivot, torsion component is used for providing interference and output torsion for first pivot and second pivot can steady rotation and location. The limiting assembly is used for controlling the rotation angles of the first pivot and the second pivot, and particularly, during the rotation process, the limiting sliding block can generate corresponding axial movement through the embedded cooperation between the limiting sliding block and the first spiral groove or the second spiral groove, so that the rotation of the first pivot and the second pivot is locked or released in each stage, and the pivot device can complete the segmented switching type rotation from 0 degrees to 360 degrees. Wherein, spacing guide bar then can lead the axial displacement of spacing sliding block, avoids it to produce unexpected skew.

In addition, the rotating axes of the first pivot and the second pivot are positioned in the limiting assembly and the torsion assembly, so that when the screen end is turned over to a specific angle relative to the system end, the pivot device and the electronic equipment can be in a flat state, and the electronic equipment can be conveniently and stably placed on a desktop.

Furthermore, two ends of the first shaft limiting and guiding groove axially penetrate through two ends of the first shaft limiting and guiding section respectively, and a central angle corresponding to an area covered by the first shaft limiting and guiding groove along the circumferential direction of the first shaft limiting and guiding section is larger than or equal to 180 degrees;

two ends of the second shaft limiting guide groove axially penetrate through two ends of the second shaft limiting guide section respectively, and a central angle corresponding to an area covered by the second shaft limiting guide groove along the circumferential direction of the second shaft limiting guide section is larger than or equal to 180 degrees.

Therefore, the pivot device can ensure that the pivot device can rotate for 360 degrees.

In order to facilitate the rotation of the first pivot and the second pivot, further, the groove bottoms of the first shaft limiting guide groove and the second shaft limiting guide groove are both arranged in a cambered surface manner;

the upper end face and the lower end face of the limiting sliding block are respectively matched with the groove bottom face of the first shaft limiting guide groove and the groove bottom face of the second shaft limiting guide groove.

The utility model discloses in, through the cooperation of the face between the cambered surface, the relative spacing direction recess of primary shaft and the slip of the spacing direction recess of secondary shaft of the spacing sliding block of being convenient for, simultaneously, do and avoid spacing sliding block to break away from spacing direction recess of primary shaft and the spacing direction recess of secondary shaft.

In order to improve the operation stability of the pivot device, the first pivot further comprises a screen end connecting section, a first shaft limiting parallel section, a first shaft limiting guide section, a first shaft limiting connecting section, a first shaft torsion interference section and a first shaft locking section which are sequentially connected, the outer diameters of the first shaft limiting parallel section and the first shaft limiting connecting section are smaller than the outer diameters of the screen end connecting section and the first shaft limiting guide section, and a first shaft nut is in threaded fit with the first shaft locking section;

the second pivot comprises a system end connecting section, a second shaft limiting parallel section, a second shaft limiting guide section, a second shaft limiting connecting section, a second shaft torsion interference section and a second shaft locking section which are sequentially connected, the outer diameters of the second shaft limiting parallel section and the second shaft limiting connecting section are smaller than those of the system end connecting section and the second shaft limiting guide section, and a second shaft nut is in threaded fit with the second shaft locking section.

The utility model discloses in, screen end linkage segment accessible screen end connecting piece links to each other with the screen end, and system end linkage segment accessible system end connecting piece links to each other with the system end. Through the arrangement of the first pivot and the second pivot, the position deviation of the limiting assembly and the torsion assembly in the operation process can be effectively avoided.

Furthermore, the limiting connecting seat also comprises a limiting parallel plate and a limiting connecting plate;

the upper end and the lower end of the limiting parallel plate are respectively connected to the first shaft limiting parallel section and the second shaft limiting parallel section;

the upper end and the lower end of the limit connecting plate are respectively connected to the second shaft limit parallel section and the second shaft limit connecting section;

and two ends of the limiting guide rod are respectively connected with the limiting parallel plate and the limiting connecting plate.

The utility model discloses in, spacing parallel plate and spacing connecting plate both can realize the support to spacing sliding block, can provide firm axial positioning effect to the relative rotation between first pivot and second pivot again.

Furthermore, a first parallel plate clamping hole in interference fit with the first shaft limiting parallel section and a second parallel plate clamping hole in interference fit with the second shaft limiting parallel section are formed in the limiting parallel plates.

The utility model discloses in, spacing parallel plate can be for first pivot and second pivot produce the interference and output torsion.

Further, the torsion assembly includes a torsion plate assembly including a plurality of torsion plates having a first shaft torsion plate inclusion hole capable of interference fit with the first pivot shaft and a second shaft torsion plate inclusion hole capable of interference fit with the second pivot shaft.

The utility model discloses in, torsion board subassembly can produce for first pivot and second pivot and interfere and output torsion, causes the strength output and the recovery of first pivot and second pivot control rotation effect.

Furthermore, the torsion assembly further comprises an elastic sheet assembly, the elastic sheet assembly comprises a first shaft elastic sheet group in interference fit with the first pivot, and the first shaft elastic sheet group comprises a plurality of first elastic torsion sheets;

the torsion assembly further comprises a second shaft elastic sheet set in interference fit with the second pivot, and the second shaft elastic sheet set comprises a plurality of second elastic torsion sheets.

The utility model discloses in, first axle elastic sheet group can provide location torsion for the tip of first pivot, and second axle elastic sheet group can provide location torsion for the tip of second pivot, so can make the pivot ware produce steady rotation effect.

Further, a spacer plate assembly is included, the spacer plate assembly being located between the torsion plate assembly and the elastic plate assembly;

the partition plate assembly comprises a partition plate, and the upper end and the lower end of the partition plate are respectively connected to the first pivot shaft and the second pivot shaft.

The utility model discloses in, through baffle plate assembly's setting, can reduce the influence each other between torsion plate assembly and the elastic sheet subassembly.

Further, the diaphragm assembly includes two of the diaphragms;

the partition plate assembly further comprises a first packing gasket connected to the first pivot and a second packing gasket connected to the second pivot, and the first packing gasket and the second packing gasket are located between the two partition plates.

The utility model discloses following beneficial effect has:

1. the utility model discloses a cooperation (slip and putting into) between spacing sliding block and the spacing direction recess of primary shaft and the spacing direction recess of secondary shaft can carry out the multistage formula to primary shaft and secondary shaft and switch over the big-angle rotation work of rotation in order to realize this pivot ware, and it both can simplify the component element of pivot ware, also can improve the stability of operation.

2. The rotating axes of the first pivot and the second pivot are positioned in the limiting assembly and the torsion assembly, so that when the screen end is turned over to a specific angle relative to the system end, the pivot device and the electronic equipment can be in a flat state, and the electronic equipment can be conveniently and stably placed on a desktop.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings required for describing the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some of the embodiments described in the present application, and that other drawings can be derived from the following drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a screw type switching pivot device according to an embodiment of the present invention when closed;

fig. 2 is a schematic structural view of a screw type switching pivot device according to an embodiment of the present invention when closed;

fig. 3 is a schematic structural view of a screw-type switching pivot device according to an embodiment of the present invention, when the pivot device is opened by 90 °;

fig. 4 is a schematic structural view of an embodiment of the screw-type switching pivot device according to the present invention, when the pivot device is opened by 90 °;

fig. 5 is a schematic structural view of a screw-type switching pivot device according to an embodiment of the present invention, when the pivot device is opened by 180 degrees;

fig. 6 is a schematic structural view of an embodiment of the screw-type switching pivot of the present invention when the pivot is opened by 180 degrees;

fig. 7 is a schematic structural view of an embodiment of the screw-type switching pivot device according to the present invention, when the pivot device is opened by 270 °;

fig. 8 is a schematic structural view of an embodiment of the screw-type switching pivot of the present invention when the pivot is opened by 270 °;

fig. 9 is a schematic structural view of an embodiment of the screw-type switching pivot device according to the present invention, when the pivot device is opened by 360 degrees;

fig. 10 is a schematic structural view of an embodiment of the screw-type switching pivot of the present invention when the pivot is opened by 360 degrees;

fig. 11 is a schematic structural view of an embodiment of the first pivot and the second pivot of the screw-type switching pivot device according to the present invention;

fig. 12 is a schematic structural view of an embodiment of the first pivot and the second pivot of the screw-type switching pivot device according to the present invention;

fig. 13 is a schematic structural view of an embodiment of a parallel plate for limiting in the screw-type switching pivot device according to the present invention;

fig. 14 is a schematic structural diagram of an embodiment of a torsion plate in the screw-type switching pivot device according to the present invention.

Wherein, the part names corresponding to the reference numbers are as follows: 10. a first pivot shaft 11, a first shaft limit guide section 111, a first shaft limit guide groove 112, a first shaft first translation guide section 113, a first shaft spiral guide section 114, a first shaft second translation guide section 12, a screen end connecting section 13, a first shaft limit parallel section 14, a first shaft torsion interference section 15, a first shaft locking section 16, a first shaft limit connecting section 17, a first shaft nut 18, a screen end connecting piece 20, a second pivot shaft 21, a second shaft limit guide section 211, a second shaft limit guide groove 22, a system end connecting section 23, a second shaft limit parallel section 24, a second shaft torsion interference section 25, a second shaft locking section 26, a second shaft limit connecting section 27, a second shaft nut 28, a system end connecting piece 31, a limit parallel plate 311, a first parallel plate clamp hole 312, a second parallel plate clamp hole, 32. the limiting connecting plate 33, the limiting guide rod 34, the limiting sliding block 51, the torsion plate 52, the first shaft torsion plate wrapping hole 53, the second shaft torsion plate wrapping hole 54, the first elastic torsion plate 55, the second elastic torsion plate 61, the partition plate 62, the first packing gasket 63 and the second packing gasket.

Detailed Description

In order to make those skilled in the art better understand the present invention, the technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be apparent that the embodiments described below are only some, but not all embodiments of the present invention. Based on the embodiments recorded in the present invention, all other embodiments obtained by those skilled in the art without creative efforts are all within the scope of the present invention.

Example 1

As shown in fig. 1 to 14, the screw-type switching pivot device includes a first pivot 10, a second pivot 20 parallel to the first pivot 10, a limiting component and a torsion component;

the first pivot 10 is provided with a first shaft limiting and guiding section 11, and the outer surface of the first shaft limiting and guiding section 11 is axially provided with a first shaft limiting and guiding groove 111;

a second shaft limiting guide section 21 is arranged on the second pivot 20, and a second shaft limiting guide groove 211 is axially arranged on the outer surface of the second shaft limiting guide section 21;

the limiting assembly comprises a limiting connecting seat, the upper end and the lower end of the limiting connecting seat are respectively connected to the first pivot 10 and the second pivot 20, the limiting connecting seat is provided with a limiting guide rod 33 which is arranged in parallel with the first pivot 10, a limiting sliding block 34 is connected onto the limiting guide rod 33, and the upper end and the lower end of the limiting sliding block 34 are simultaneously abutted to the groove bottom of the first shaft limiting guide groove 111 and the groove bottom of the second shaft limiting guide groove 211 respectively;

when the first pivot 10 is rotated and the second pivot 20 is stationary, the first shaft limit guide groove 111 can drive the limit slide block 34 to move axially along the second shaft limit guide groove 211 relative to the limit guide rod 33;

when the second pivot 20 is rotated and the first pivot 10 is stationary, the second axle limit guide groove 211 can drive the limit slide block 34 to move axially along the first axle limit guide groove 111 relative to the limit guide rod 33;

the torsion assembly is capable of interference engagement with both the first pivot 10 and the second pivot 20.

Preferably, two ends of the first shaft limiting and guiding groove 111 axially penetrate two ends of the first shaft limiting and guiding section 11 respectively, and a central angle corresponding to an area covered by the first shaft limiting and guiding groove 111 along the circumferential direction of the first shaft limiting and guiding section 11 is greater than or equal to 180 degrees;

two ends of the second shaft limiting guide groove 211 axially penetrate through two ends of the second shaft limiting guide section 21 respectively, and a central angle corresponding to an area covered by the second shaft limiting guide groove 211 along the circumferential direction of the second shaft limiting guide section 21 is larger than or equal to 180 degrees.

In the present embodiment, the meandering shape of the first shaft limit guide groove 111 and the second shaft limit guide groove 211 may be designed according to a preset switching stage. If the first pivot 20 is rotated to 90 degrees in a first stage (the maximum angle of the two shafts can be opened at this stage is 90 degrees), the second pivot 10 is rotated to 180 degrees in a second stage (the maximum angle of the two shafts can be opened at this stage is 270 degrees), and the third pivot is rotated to 90 degrees in a third stage (the maximum angle of the two shafts can be opened at this stage is 360 degrees), the first shaft limit guide groove 111 can comprise the first shaft first translation guide section 112, the first shaft spiral guide section 113, and the first shaft second translation guide section 114 which are connected in sequence, the second shaft limit guide groove 211 can comprise the second shaft first spiral guide section 222, the second shaft translation guide section 223, and the second shaft second spiral guide section 214 which are connected in sequence, wherein the second shaft first spiral guide section 222 faces the axial region covered by the first shaft first translation guide section 112, and the second shaft translation guide section 223 faces the axial region covered by the first shaft spiral guide section 113, the second shaft second helical guide section 214 is directly opposite the axial area covered by the first shaft second translational guide section 114.

In use, the first pivot 10 may be connected to the screen side and the second pivot 20 may be connected to the system side. As shown in fig. 1 and 2, the zero position is shown, that is, the screen end and the system end are in the closed state. In this state, the upper and lower ends of the limit slider 34 abut against the groove bottom of the first shaft first translational guide section 112 and the groove bottom of the second shaft first helical guide section 222, respectively, and at this time, the limit slider 34 releases the rotation of the second pivot shaft 20 and locks the rotation of the first pivot shaft 10, so that the second pivot shaft 20 can be rotated by 90 °, as shown in fig. 3 and 4. In this process, the second shaft first spiral guiding section 222 drives the limit sliding block 34 to move axially relative to the limit guiding rod 33, and the first shaft first translational guiding section 112 also provides translational guiding for the movement of the limit sliding block 34. When the top end of the limit slide block 34 reaches the end of the first shaft first translational guide section 112 and the bottom end of the limit slide block 34 reaches the end of the second shaft first helical guide section 222, the limit slide block 34 locks the rotation of the second pivot 20 and releases the rotation of the first pivot 10, and then the first pivot 10 can be rotated 180 °. In the process of rotating the first pivot 10 by 90 ° as shown in fig. 5 and 6 and by 180 ° as shown in fig. 7 and 8, the first shaft spiral guide section 113 will drive the limit slider 34 to move axially relative to the limit guide rod 33, and the second shaft translational guide section 223 can also provide translational guide for the movement of the limit slider 34. When the top end of the limit sliding block 34 reaches the end point of the first shaft spiral guiding section 113 and the bottom end of the limit sliding block 34 reaches the end point of the second shaft translational guiding section 223, the limit sliding block 34 will release the rotation of the second pivot 20 and lock the rotation of the first pivot 10, at this time, the second pivot 20 can be rotated by 90 °, as shown in fig. 9 and 10, in this process, the second shaft second spiral guiding section 214 will drive the limit sliding block 34 to move axially relative to the limit guiding rod 33, the first shaft second translational guiding section 114 can also provide translational guiding for the movement of the limit sliding block 34, and thus, the pivot device can complete the 360 ° turning operation.

Example 2

This example is further defined on the basis of example 1 as follows: the groove bottoms of the first shaft limiting guide groove 111 and the second shaft limiting guide groove 211 are both arranged in a cambered surface;

the upper end face and the lower end face of the limit sliding block 34 are respectively adapted to the groove bottom face of the first shaft limit guide groove 111 and the groove bottom face of the second shaft limit guide groove 211.

Example 3

This example is further defined on the basis of example 1 as follows: the first pivot 10 comprises a screen end connecting section 12, a first shaft limiting parallel section 13, a first shaft limiting guide section 11, a first shaft limiting connecting section 16, a first shaft torsion interference section 14 and a first shaft locking section 15 which are sequentially connected, the outer diameters of the first shaft limiting parallel section 13 and the first shaft limiting connecting section 16 are smaller than the outer diameters of the screen end connecting section 12 and the first shaft limiting guide section 11, and a first shaft nut 17 is in threaded fit with the first shaft locking section 15;

the second pivot 20 comprises a system end connecting section 22, a second shaft limiting parallel section 23, a second shaft limiting guide section 21, a second shaft limiting connecting section 26, a second shaft torsion interference section 24 and a second shaft locking section 25 which are sequentially connected, the outer diameters of the second shaft limiting parallel section 23 and the second shaft limiting connecting section 26 are smaller than the outer diameters of the system end connecting section 22 and the second shaft limiting guide section 21, and a second shaft nut 27 is in threaded fit with the second shaft locking section 25.

Preferably, the limit connecting base further comprises a limit parallel plate 31 and a limit connecting plate 32;

the upper end and the lower end of the limiting parallel plate 31 are respectively connected to the first shaft limiting parallel section 13 and the second shaft limiting parallel section 23;

the upper end and the lower end of the limit connecting plate 32 are respectively connected to the second shaft limit parallel section 23 and the second shaft limit connecting section 26;

the two ends of the limit guide rod 33 are respectively connected with the limit parallel plate 31 and the limit connecting plate 32.

Preferably, the parallel plate 31 is provided with a first parallel plate clamping hole 311 in interference fit with the first shaft limiting parallel section 13 and a second parallel plate clamping hole 312 in interference fit with the second shaft limiting parallel section 23.

In this embodiment, the first parallel plate clipping hole 311 and the second parallel plate clipping hole 312 can both penetrate through the side end of the position-limiting parallel plate 31.

Example 4

This embodiment is further defined by any of embodiments 1 through 3 as follows: the torsion assembly comprises a torsion plate assembly including a plurality of torsion plates 51, the torsion plates 51 having first axle torsion plate packet apertures 52 capable of interference fit with the first pivot axle 10 and second axle torsion plate packet apertures 53 capable of interference fit with the second pivot axle 20.

In this embodiment, the first shaft torsion plate packet hole 52 may extend through the top end of the torsion plate 51, and the second shaft torsion plate packet hole 53 may extend through the bottom end of the torsion plate 51.

Preferably, the torsion assembly further comprises an elastic sheet assembly, the elastic sheet assembly comprises a first shaft elastic sheet group in interference fit with the first pivot 10, and the first shaft elastic sheet group comprises a plurality of first elastic torsion sheets 54;

the torque assembly further includes a second shaft elastic sheet set in interference fit with the second pivot 20, and the second shaft elastic sheet set includes a plurality of second elastic torque sheets 55.

In this embodiment, the cross section of the area of the first pivot 10 in interference fit with the first shaft elastic sheet group may be set to be non-circular; the cross-section of the region of the second pivot 20 in interference fit with the set of second shaft blades may be provided as non-circular.

Preferably, a spacer assembly is further included, the spacer assembly being located between the torsion plate assembly and the elastic plate assembly;

the partition plate assembly comprises a partition plate 61, and the upper end and the lower end of the partition plate 61 are respectively connected to the first pivot shaft 10 and the second pivot shaft 20.

Preferably, the baffle plate assembly comprises two of the baffle plates 61;

the partition plate assembly further comprises a first packing pad 62 connected to the first pivot 10 and a second packing pad 63 connected to the second pivot 20, and the first packing pad 62 and the second packing pad 63 are located between the two partition plates 61.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of the ordinary skilled person say, do not deviate from the utility model discloses a other embodiments that reach under the technical scheme all should be contained the utility model discloses a within the scope of protection.

Claims

1. The pivot ware is switched to screw, its characterized in that: comprises a first pivot (10), a second pivot (20) arranged in parallel with the first pivot (10), a limiting component and a torsion component;

the first pivot (10) is provided with a first shaft limiting guide section (11), and the outer surface of the first shaft limiting guide section (11) is provided with a first shaft limiting guide groove (111) along the axial direction;

a second shaft limiting guide section (21) is arranged on the second pivot (20), and a second shaft limiting guide groove (211) is formed in the outer surface of the second shaft limiting guide section (21) along the axial direction of the second shaft limiting guide section;

the limiting assembly comprises a limiting connecting seat, the upper end and the lower end of the limiting connecting seat are respectively connected to the first pivot (10) and the second pivot (20), the limiting connecting seat is provided with a limiting guide rod (33) arranged in parallel with the first pivot (10), a limiting sliding block (34) is connected onto the limiting guide rod (33), and the upper end and the lower end of the limiting sliding block (34) are simultaneously and respectively abutted against the groove bottom of the first shaft limiting guide groove (111) and the groove bottom of the second shaft limiting guide groove (211);

when the first pivot (10) is rotated and the second pivot (20) is static, the first shaft limit guide groove (111) can drive the limit sliding block (34) to move axially along the second shaft limit guide groove (211) relative to the limit guide rod (33);

when the second pivot (20) is rotated and the first pivot (10) is static, the second shaft limit guide groove (211) can drive the limit sliding block (34) to move axially along the first shaft limit guide groove (111) relative to the limit guide rod (33);

the torsion assembly can be in interference fit with the first pivot (10) and the second pivot (20).

2. The screw-type switching pivot of claim 1, wherein: two ends of the first shaft limiting and guiding groove (111) axially penetrate through two ends of the first shaft limiting and guiding section (11) respectively, and a central angle corresponding to an area covered by the first shaft limiting and guiding groove (111) along the circumferential direction of the first shaft limiting and guiding section (11) is larger than or equal to 180 degrees;

two ends of the second shaft limiting guide groove (211) axially penetrate through two ends of the second shaft limiting guide section (21) respectively, and a central angle corresponding to an area covered by the second shaft limiting guide groove (211) along the circumferential direction of the second shaft limiting guide section (21) is larger than or equal to 180 degrees.

3. The screw-type switching pivot of claim 1, wherein: the groove bottoms of the first shaft limiting guide groove (111) and the second shaft limiting guide groove (211) are both arranged in a cambered surface manner;

the upper end face and the lower end face of the limiting sliding block (34) are respectively matched with the groove bottom face of the first shaft limiting guide groove (111) and the groove bottom face of the second shaft limiting guide groove (211).

4. The screw-type switching pivot of claim 1, wherein: the first pivot (10) comprises a screen end connecting section (12), a first shaft limiting parallel section (13), a first shaft limiting guide section (11), a first shaft limiting connecting section (16), a first shaft torsion interference section (14) and a first shaft locking section (15) which are sequentially connected, the outer diameters of the first shaft limiting parallel section (13) and the first shaft limiting connecting section (16) are smaller than those of the screen end connecting section (12) and the first shaft limiting guide section (11), and a first shaft nut (17) is in threaded fit with the first shaft locking section (15);

the second pivot (20) comprises a system end connecting section (22), a second shaft limiting parallel section (23), a second shaft limiting guide section (21), a second shaft limiting connecting section (26), a second shaft torsion interference section (24) and a second shaft locking section (25) which are sequentially connected, the outer diameters of the second shaft limiting parallel section (23) and the second shaft limiting connecting section (26) are smaller than the outer diameters of the system end connecting section (22) and the second shaft limiting guide section (21), and a second shaft nut (27) is in threaded fit with the second shaft locking section (25).

5. The screw-type switching pivot of claim 4, wherein: the limiting connecting seat further comprises a limiting parallel plate (31) and a limiting connecting plate (32);

the upper end and the lower end of the limiting parallel plate (31) are respectively connected to the first shaft limiting parallel section (13) and the second shaft limiting parallel section (23);

the upper end and the lower end of the limit connecting plate (32) are respectively connected to the second shaft limit parallel section (23) and the second shaft limit connecting section (26);

two ends of the limiting guide rod (33) are respectively connected with the limiting parallel plate (31) and the limiting connecting plate (32).

6. The screw-type switching pivot of claim 5, wherein: and the limiting parallel plates (31) are provided with first parallel plate clamping holes (311) in interference fit with the first shaft limiting parallel sections (13) and second parallel plate clamping holes (312) in interference fit with the second shaft limiting parallel sections (23).

7. The screw-type switching pivot tool according to any one of claims 1 to 6, characterized in that: the torsion assembly includes a torsion plate assembly including a plurality of torsion plates (51), the torsion plates (51) having first shaft torsion plate inclusion holes (52) capable of interference fit with the first pivot shaft (10) and second shaft torsion plate inclusion holes (53) capable of interference fit with the second pivot shaft (20).

8. The screw-type switching pivot of claim 7, wherein: the torsion assembly further comprises an elastic sheet assembly, the elastic sheet assembly comprises a first shaft elastic sheet set in interference fit with the first pivot (10), and the first shaft elastic sheet set comprises a plurality of first elastic torsion sheets (54);

the torsion assembly further comprises a second shaft elastic sheet group in interference fit with the second pivot (20), and the second shaft elastic sheet group comprises a plurality of second elastic torsion sheets (55).

9. The screw-type switching pivot of claim 8, wherein: the partition plate assembly is positioned between the torsion plate assembly and the elastic plate assembly;

the partition plate assembly comprises a partition plate (61), and the upper end and the lower end of the partition plate (61) are respectively connected to the first pivot shaft (10) and the second pivot shaft (20).

10. The screw-type switching pivot of claim 9, wherein: the baffle plate assembly comprises two baffle plates (61);

the partition plate assembly further comprises a first packing gasket (62) connected to the first pivot (10) and a second packing gasket (63) connected to the second pivot (20), and the first packing gasket (62) and the second packing gasket (63) are located between the two partition plates (61).