CN113968363A

CN113968363A - Mounting base for mounting extravehicular tool

Info

Publication number: CN113968363A
Application number: CN202111232451.4A
Authority: CN
Inventors: 范子琦; 于洋; 朱恺旻; 郝宏大; 常冬林; 孙振业; 黄伦伦
Original assignee: Beijing Institute of Spacecraft Environment Engineering
Current assignee: Beijing Institute of Spacecraft Environment Engineering
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-01-25
Anticipated expiration: 2041-10-22
Also published as: CN113968363B

Abstract

The application provides a mounting base for installing extravehicular instrument includes: a base body; one end of the base body is an insertion end, and the insertion end is provided with an insertion hole for installing an extravehicular tool along the axial direction of the base body; a pair of clamping grooves are formed in the end face of the insertion end along a first radial direction, and clamping holes are formed in the side walls of the clamping grooves; the tool outside the cabin is provided with a lug which is inserted into the clamping groove, and the lug is provided with a top bead which is clamped into the clamping hole; a pair of bolt through holes are formed in the side wall of the base body along the second radial direction, and a pair of bolts used for correspondingly extending into or out of the bolt through holes are arranged on the tool outside the cabin. The application provides a mounting base for installing extravehicular instrument simple structure, the installation of being convenient for is dismantled, has the function of preventing floating in the rail before the locking.

Description

Mounting base for mounting extravehicular tool

Technical Field

The present disclosure relates generally to the field of space station extra-cabin maintenance techniques, and more particularly to an installation base for installing extra-cabin tools.

Background

In recent years, China is accelerating the construction of space stations, and since the on-track operation time of the space stations is required to be as long as 15 years, and part of extravehicular equipment can be out of order during the on-track operation time, the on-track maintenance and replacement of the extravehicular equipment are required. Space station extravehicular maintenance requires the use of extravehicular tools, necessitating a mounting base for the installation of extravehicular tools.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a mounting base for mounting an extra-cabin tool that solves the above-mentioned technical problems.

The application provides a mounting base for installing extravehicular instrument includes: a base body; one end of the base body is an insertion end, and the insertion end is provided with an insertion hole for installing the extravehicular tool along the axial direction of the base body;

a pair of clamping grooves is formed in the end face of the insertion end along a first radial direction, and clamping holes are formed in the side walls of the clamping grooves; the tool outside the cabin is provided with a lug which is inserted into the clamping groove, and the lug is provided with a top bead which is clamped into the clamping hole;

the base body is provided with a pair of bolt through holes along a second radial direction on the side wall, and the extravehicular tool is provided with a pair of bolts correspondingly extending into or out of the bolt through holes.

According to the technical scheme provided by the embodiment of the application, the first radial direction and the second radial direction are perpendicular to each other.

According to the technical scheme that this application embodiment provided, the base body other end is the stiff end, the fixing base is installed to the stiff end, be equipped with a plurality of on the fixing base be used for with general cabin body fixed connection's fixed orifices.

According to the technical scheme that this application embodiment provided, follow on the base body lateral wall and be on a parallel with base body axis direction just corresponds the fixed orifices is equipped with dodges and leads to the groove.

According to the technical scheme provided by the embodiment of the application, the extravehicular tool comprises:

an extravehicular tool body;

one end of the sleeve can be inserted into the insertion hole, and the other end of the sleeve is fixedly connected with the extravehicular tool body;

wherein the bolt is mounted on the sleeve through a transmission assembly; the transmission assembly is used for driving the lock tongue to extend into or extend out of the lock tongue through hole when acting; the lug is mounted on the side wall of the sleeve and is positioned between the lock tongue and the extravehicular tool body.

According to the technical scheme provided by the embodiment of the application, the transmission assembly is installed in the sleeve and comprises:

the driving rod is arranged along the axial direction of the sleeve;

a U-shaped member having two extending portions and a connecting portion; the connecting part is fixedly connected with the end part of the driving rod; a connecting rod is hinged to each of the two extending parts; each connecting rod is fixedly connected with one lock tongue; the lock tongues are arranged along the second radial direction; a first spring is arranged between the two lock tongues;

the side wall of the sleeve is provided with a mounting hole corresponding to the bolt through hole, and the end part of the bolt extends out of the mounting hole; when the driving rod rotates, the driving rod is used for driving the two lock tongues to move away from or approach to each other along the second radial direction.

According to the technical scheme provided by the embodiment of the application, a first adjusting hole is formed in the side wall of the sleeve and far away from the mounting hole; the end, far away from the U-shaped piece, of the driving rod is coaxially provided with a twisting sleeve, a shifting rod for driving the twisting sleeve to rotate is fixedly mounted on the side wall of the twisting sleeve, and the other end of the shifting rod extends out of the first adjusting hole.

According to the technical scheme provided by the embodiment of the application, the torsion sleeve is provided with a plurality of ball grooves along the circumferential direction; a second adjusting hole is formed in the side wall of the sleeve, a fixing sleeve is mounted in the second adjusting hole, and a pin matched and locked with the ball groove is arranged in the fixing sleeve; a second spring is arranged between the pin and the fixed sleeve;

when the twisting sleeve rotates to a first state, the pin can be inserted into the ball groove;

when the twisting sleeve rotates to the second state, the pin can slide out of the ball groove.

According to the technical scheme provided by the embodiment of the application, the side wall of the sleeve is rotatably connected with a shifting sheet;

when the shifting piece rotates to a first position, the shifting piece is far away from the pin;

when the plectrum rotates to the second position, the plectrum with the pin is kept away from ball groove one end butt to the restriction twist reverse the cover and rotate.

According to the technical scheme that this application embodiment provided, the cover is equipped with solid fixed ring on the sleeve pipe lateral wall, the lug is installed gu fixed ring is last, gu fixed ring with install the stiffening rib between the sleeve pipe lateral wall.

The beneficial effect of this application lies in: when the base is used, the base body is fixed on a cabin body or a mechanical arm, the tool outside the cabin is inserted into the insertion hole, at the moment, the convex block on the tool outside the cabin can be inserted into the clamping groove on the base body along the same trend, meanwhile, the top bead on the convex block is clamped into the clamping hole, friction force is provided between the top bead and the clamping hole, and the tool outside the cabin is prevented from drifting out of the base body before being quickly assembled and locked. And after the tool is installed in place, the lock tongue on the tool outside the cabin is inserted into the lock tongue through hole to realize locking.

The application provides a mounting base for installing extravehicular instrument, simple structure, the installation of being convenient for is dismantled, has the in-orbit before the locking and prevents floating the function.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural view of a mounting base for mounting an extra-cabin tool provided herein;

FIG. 2 is a schematic view of an assembled structure of the mounting base and the extravehicular tool shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the overboard tool of FIG. 2;

FIG. 4 is a schematic view of the mounting arrangement within the sleeve 13 shown in FIG. 3;

fig. 5 is a schematic view of the mounting structure of the locking bolt 14 shown in fig. 4;

FIG. 6 is a schematic view of the U-shaped member 15 of FIG. 4;

FIG. 7 is a schematic view of the mounting arrangement of the pin 24 shown in FIG. 4;

fig. 8 is a cross-sectional structural view of the harness 23 of fig. 7;

fig. 9 is a schematic structural view of the pull tab 27 shown in fig. 7, which is provided with a first engaging groove 31 and a second engaging groove 32.

Reference numbers in the figures:

1. a base body; 2. an insertion hole; 3. a card slot; 4. a clamping hole; 5. a bump; 6. a top bead; 7. a bolt through hole; 8. a latch bolt; 9. a fixed seat; 10. a fixing hole; 11. avoiding the through groove; 13. a sleeve; 14. a drive rod; 15. a U-shaped piece; 151. an extension portion; 152. a connecting portion; 16. a connecting rod; 17. a first spring; 18. mounting holes; 19. a first adjustment aperture; 20. a torsion sleeve; 21. a deflector rod; 22. a second adjustment aperture; 23. fixing a sleeve; 24. a pin; 25. a second spring; 26. a ball groove; 27. a shifting sheet; 28. a plug pin head; 29. a fixing ring; 30. reinforcing ribs; 31. a first clamping groove; 32. a second clamping groove; 33. and (5) clamping the beads.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Please refer to fig. 1, which is a mounting base for mounting an outboard tool provided by the present application, comprising: a base body 1; one end of the base body 1 is an insertion end, and the insertion end is provided with an insertion hole 2 used for installing the extravehicular tool along the axial direction of the base body 1;

a pair of clamping grooves 3 is formed in the end face of the insertion end along a first radial direction, and clamping holes 4 are formed in the side walls of the clamping grooves 3; the extravehicular tool is provided with a bump 5 which is inserted into the clamping groove 3, and the bump 5 is provided with a top bead 6 which is clamped into the clamping hole 4;

a pair of bolt through holes 7 is formed in the side wall of the base body 1 along the second radial direction, and a pair of bolts 8 used for correspondingly extending into or out of the bolt through holes 7 are arranged on the tool outside the cabin.

In particular, the extravehicular tool may be a foot restraint.

Specifically, the base body 1 is a cylindrical metal structural member; preferably, the base body 1 comprises a first cylinder 101 and a second cylinder 102 which are coaxially arranged; the insertion end is the end of the first cylinder 101 far away from the second cylinder 102; the bolt through hole 7 is arranged on the side wall of the first cylinder 101, and the outer diameter of the second cylinder 102 is smaller than that of the first cylinder 101;

specifically, two bolt through holes 7 are formed and are symmetrically arranged along the second radial direction; in this embodiment, the bolt through hole 7 is a rectangular through hole, and in other embodiments, it may also be a circular through hole, a polygonal through hole, or the like.

Specifically, two of the clamping grooves 3 are symmetrically arranged along the first radial direction; in this embodiment, the slot 3 is a square through hole, but in other embodiments, it may also be a circular through hole, a polygonal through hole, or the like.

Specifically, the clamping hole 4 is a hemispherical hole.

It is understood that the first radial direction and the second radial direction are radial directions of the base body 1, which are perpendicular to the axial direction of the base body 1; an included angle is formed between the first radial direction and the second radial direction, and the included angle is 0-180 degrees; preferably, the included angle is 90 degrees, that is, the first radial direction is perpendicular to the second radial direction, so that the lock tongue 8 and the projection 5 jointly limit the extravehicular tool to rotate along the axis of the extravehicular tool, and the positioning effect is better.

Specifically, the insertion hole 2 is arranged along the central axis of the base body 1, so that the insertion end face forms a regular annular end face, which is convenient for symmetrically arranging the clamping grooves 3;

the working principle is as follows: during use, the base body 1 is fixed on a cabin body or a mechanical arm, the tool outside the cabin is inserted into the insertion hole 2, at the moment, the lug 5 on the tool outside the cabin can be inserted into the clamping groove 3 on the base body 1 along the trend, meanwhile, the ejecting bead 6 on the lug 5 is clamped into the clamping hole 4, friction force is provided between the ejecting bead 6 and the clamping hole 4, and the tool outside the cabin is prevented from drifting out of the base body 1 before being quickly assembled and locked. After the tool is installed in place, the lock tongue 8 on the tool outside the cabin is inserted into the lock tongue through hole 7 to realize locking.

The installation base for installing the tool outside the cabin has the advantages of simple structure, convenient installation and disassembly, on-rail float prevention function before locking,

wherein, in a preferred embodiment, the 1 other end of base body is the stiff end, fixing base 9 is installed to the stiff end, be equipped with a plurality of on the fixing base 9 be used for with general cabin body fixed connection's fixed orifices 10.

Specifically, the fixing seat 9 has a circular mounting surface, and the fixing holes 10 are uniformly distributed on the circular mounting surface around the base body 1; in this embodiment, the fixing seat 9 and the base body 1 are an integral structure, and in other embodiments, the fixing seat 9 and the base body 1 may also be a split structure.

Specifically, the number of the fixing holes 10 is 12, and 6 fixing holes distributed randomly are selected for installation by screws during installation, so that installation at any angle with a division value of 30 degrees can be realized according to requirements.

Example 2

On the basis of embodiment 1, in this embodiment, an avoiding through groove 11 is formed in the side wall of the base body 1 along a direction parallel to the axis of the base body 1 and corresponding to the fixing hole 10.

Specifically, as shown in fig. 1, the avoiding through groove 11 is a semicircular groove; the avoiding through groove 11 is arranged corresponding to the fixing hole 10, namely the avoiding through groove 11 and the corresponding fixing hole 11 are positioned on the same straight line, so that a screw can be conveniently detached by a tool when the base body 1 is installed;

preferably, 12 avoiding through grooves 11 and 12 fixing holes 10 are arranged; wherein 6 dodging of even cloth are led and are led spraying colour sign in the logical groove 11, and every symmetrical a set of dodging logical groove 11 uses a colour sign, and the colour sign is used for equipment to install the angle when on the base body 1 is counterpointed.

Example 3

On the basis of embodiment 1, in this embodiment, as shown in fig. 2 and 3, the extravehicular tool includes:

an extravehicular tool body;

one end of the sleeve 13 can be inserted into the insertion hole 2, and the other end of the sleeve is fixedly connected with the extravehicular tool body;

wherein the bolt 8 is mounted on the sleeve 13 through a transmission assembly; when the transmission assembly acts, the transmission assembly is used for driving the bolt 8 to extend into or out of the bolt through hole 7; the lug 5 is mounted on the side wall of the sleeve 13 and is located between the bolt 8 and the tool body.

The working principle is as follows: when the anti-floating device is used, the sleeve 13 is inserted into the insertion hole 2, the lug 5 can be inserted into the clamping groove 3 on the base body 1 in a proper manner, and the top bead 6 on the lug 5 is clamped with the clamping hole 4, so that the anti-floating effect on the rail is realized; meanwhile, the driving assembly can be driven to act, so that the lock tongue 8 can extend into the lock tongue through hole 7, and the stopper is clamped and fixed with the base body 1. Through setting up drive assembly for can be convenient for control the stretching into or the state of stretching out of spring bolt 8, be convenient for carry out the fast-assembling joint, the installation or the dismantlement process is comparatively convenient.

In a preferred embodiment, as shown in fig. 4-6, the transmission assembly is mounted within the sleeve 13, the transmission assembly comprising:

a drive rod 14 provided along the axial direction of the sleeve 13;

a U-shaped member 15 having two extending portions 151 and one connecting portion 152; the connecting part 152 is fixedly connected with the end part of the driving rod 14; a connecting rod 16 is hinged on each of the two extending parts 151; each connecting rod 16 is fixedly connected with one lock tongue 8; the lock tongues 8 are arranged along the second radial direction; a first spring 17 is arranged between the two lock tongues 8;

a mounting hole 18 is formed in the side wall of the sleeve 13 and corresponds to the bolt through hole 7, and the end of the bolt 8 extends out of the mounting hole 18; when the driving rod 14 rotates, the driving rod is used for driving the two lock tongues 8 to move away from or close to each other along the second radial direction.

It will be appreciated that said second radial direction is perpendicular to the axial direction of said driving rod 14;

preferably, the first spring 17 is located in the U-shaped opening of the U-shaped member 15 formed by the two extending portions 151 and the connecting portion 152;

preferably, said connecting rods 16 are arranged along said second radial direction;

the working principle is as follows: as the driving rod 14 is connected with the U-shaped part 15, the extending parts 151 of the U-shaped part 15 are hinged with the connecting rods 16, and each connecting rod 16 is fixedly connected with one bolt 8; such that:

when the driving rod 14 is driven to rotate along the axis thereof, the two connecting rods 16 are away from each other in the second radial direction, and then the two locking tongues 8 can be driven to be away from each other, so that the locking tongues 8 extend into the locking tongue through holes 7 to realize locking.

When the driving rod 14 is rotated reversely, the two connecting rods 16 approach each other in the second radial direction, so that the latch 8 extends out of the latch through hole 7, and the locking is released.

Through the structure, the two lock tongues 8 can be conveniently driven to extend out of or extend out of the lock tongue through hole 7, so that the installation operation of astronauts is facilitated;

in a preferred embodiment, a first adjusting hole 19 is formed in the side wall of the sleeve 13 and far away from the mounting hole 8; a torsion sleeve 20 is coaxially arranged at one end of the driving rod 14, which is far away from the U-shaped member 15, a shift lever 21 for driving the torsion sleeve 20 to rotate is fixedly installed on the side wall of the torsion sleeve 20, and the other end of the shift lever 21 extends out of the first adjusting hole 19. The torsion sleeve 20 and the shifting lever 21 are arranged, so that the shifting lever 21 can be directly shifted to drive the torsion sleeve 20 to rotate, and further drive the driving rod 14 to rotate, and the operation is convenient.

In a preferred embodiment, a bolt head 28 is mounted at one end of the sleeve 13 far away from the tool body outside the cabin, and the bolt head 28 is of a conical structure. Through the arrangement of the conical plug head 28, a guiding effect is achieved, and the sleeve 13 can be conveniently and accurately inserted into the base body 1.

In a preferred embodiment, the sleeve 13 is sleeved with a fixing ring 29, the bump 5 is mounted on the fixing ring 18, and a reinforcing rib 30 is mounted between the fixing ring 29 and the sleeve 13. By arranging the fixing ring 18 and the reinforcing ribs 30, the structural strength is improved, and the service life of the device is prolonged.

Example 4

On the basis of embodiment 3, in this embodiment, as shown in fig. 3 to 8, the torsion sleeve 20 is provided with a plurality of ball grooves 26 along the circumferential direction thereof; a second adjusting hole 22 is formed in the side wall of the sleeve 13, a fixing sleeve 23 is installed in the second adjusting hole 22, and a pin 24 used for being matched and locked with the ball groove 26 is arranged in the fixing sleeve 23; a second spring 25 is arranged between the pin 24 and the fixed sleeve 23;

when the twist sleeve 20 is rotated to the first state, the pin 24 can be inserted into the ball groove 26;

when the twist sleeve 20 is rotated to the second position, the pin 24 can slide out of the ball groove 26.

Specifically, the second spring 25 is sleeved on the pin 24, one end of the second spring 25 is fixedly connected with the side wall of the pin 24, and the other end of the second spring 25 is fixed inside the fixing sleeve 23;

specifically, one end of the pin 24 close to the ball groove 26 is of a hemispherical structure, so that the pin 24 can conveniently slide out under the action of the rotation of the torsion sleeve 20 in cooperation with the ball groove 26.

When the torsion sleeve 20 is rotated to the first state, the torsion sleeve 20 has a ball groove 26 which is located at one side close to the pin 24 and is coaxial with the pin 24, and at this time, the second spring 25 is in a natural state and the pin 24 is inserted into the ball groove 26, so that locking is realized.

When the twisting sleeve 20 rotates to the second state, the pin 24 is not collinear with all the ball grooves 26 close to one side thereof, that is, when the twisting sleeve 20 rotates from the first state to the second state, under the action of the side walls of the ball grooves 26 and the end portions of the pin 24, the pin 24 drives the second spring 25 to contract towards the inside of the fixed sleeve 23, and the end portion of the pin 24 abuts against the side wall of the twisting sleeve 20.

During the process of rotating the twisting sleeve 20, the twisting sleeve 20 is switched between the first state and the second state, so that the pin 24 can be inserted into the ball groove 26 at the adaptive position, and the locking of the rotating position of the twisting sleeve 20 is realized. The adaptive position refers to a rotation position of the torsion sleeve 20 corresponding to the bolt 8 extending into or out of the bolt through hole 7.

In a preferred embodiment, a pull tab 27 is rotatably connected to the sidewall of the sleeve 13;

when the pick 27 is rotated to the first position, the pick 27 is away from the pin 24;

when the shifting piece 27 rotates to the second position, the shifting piece 27 abuts against one end of the pin 24 far away from the ball groove 26 to limit the rotation of the torsion sleeve 20.

Preferably, when said pin 24 is inserted into said ball groove 26, its other end is flush with the end of said fixing sleeve 23; when the pick 27 is rotated to the second position, it abuts against the end of the sleeve 23 and at the same time abuts against the end of the pin 24.

The working principle is as follows:

when the pin 24 is inserted into the ball groove 26 of the adaptive position, in order to avoid the external force from rotating the twisting sleeve 20 by mistake, the shifting piece 27 is rotated to the second position, so that the shifting piece 27 is abutted against one end of the pin 24 far away from the ball groove 26, and the pin 24 is limited between the ball groove 26 and the shifting piece 27, thereby realizing secondary locking of the twisting sleeve 20 and preventing the extravehicular tool from being separated from the base body 1 due to mistaken collision of the shifting rod 21 in the operation process of a astronaut.

When the position of the twisting sleeve 20 needs to be adjusted, the shifting piece 27 can be rotated to a first position, the shifting piece 27 is far away from the pin 24, and at the moment, when the twisting sleeve 20 is rotated, the pin 24 can move to the side far away from the ball groove 26, so that the locking is released.

In a preferred embodiment, as shown in fig. 3 and 9, a clamping bead 33 is disposed on a side wall of the sleeve 13, and a first clamping groove 31 and a second clamping groove 32 are disposed on one side of the shifting piece 27 close to the side wall;

when the shifting piece 27 rotates to the first position, the first clamping groove 31 is matched and clamped with the clamping bead 33;

when the shifting piece 27 rotates to the second position, the second clamping groove 32 is clamped with the clamping bead 33 in a matching manner.

Specifically, the first engaging groove 31 and the second engaging groove 32 are hemispherical engaging grooves. Through the structure, the limiting clamping of the shifting piece 27 at the first position and the second position is realized.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A mounting base for mounting an extravehicular tool, comprising: a base body (1); one end of the base body (1) is an insertion end, and the insertion end is provided with an insertion hole (2) used for installing the tool outside the cabin along the axial direction of the base body (1);

a pair of clamping grooves (3) is formed in the end face of the insertion end along a first radial direction, and clamping holes (4) are formed in the side walls of the clamping grooves (3); the extravehicular tool is provided with a bump (5) which is inserted into the clamping groove (3), and the bump (5) is provided with a top bead (6) which is clamped into the clamping hole (4);

the base body (1) is provided with a pair of bolt through holes (7) along a second radial direction on the side wall, and the extravehicular tool is provided with a pair of bolts (8) which correspondingly extend into or out of the bolt through holes (7).

2. The mounting base for mounting an extra-vehicular tool of claim 1, wherein the first radial direction and the second radial direction are mutually perpendicular.

3. The mounting base for mounting the extravehicular tool is characterized in that the other end of the base body (1) is a fixed end, a fixed seat (9) is mounted on the fixed end, and a plurality of fixing holes (10) for fixedly connecting with a general cabin body are formed in the fixed seat (9).

4. The mounting base for mounting an extravehicular tool according to claim 3, characterized in that an avoiding through groove (11) is formed in the side wall of the base body (1) along a direction parallel to the axis of the base body and corresponding to the fixing hole (10).

5. The mounting base for mounting an extravehicular tool as set forth in claim 1, wherein the extravehicular tool comprises:

an extravehicular tool body;

one end of the sleeve (13) can be inserted into the insertion hole (2), and the other end of the sleeve is fixedly connected with the extravehicular tool body;

wherein the bolt (8) is mounted on the sleeve (13) through a transmission assembly; the transmission assembly is used for driving the lock tongue (8) to extend into or out of the lock tongue through hole (7) when acting; the lug (5) is arranged on the side wall of the sleeve (13) and is positioned between the lock tongue (8) and the extravehicular tool body.

6. Mounting base for mounting an extra-cabin tool according to claim 5, characterized in that the transmission assembly is mounted inside the bushing (13), the transmission assembly comprising:

a drive rod (14) disposed along an axial direction of the sleeve (13);

a U-shaped member (15) having two extensions (151) and a connecting portion (152); the connecting part (152) is fixedly connected with the end part of the driving rod (14); a connecting rod (16) is hinged on each of the two extending parts (151); each connecting rod (16) is fixedly connected with one lock tongue (8); the lock tongues (8) are arranged along the second radial direction; a first spring (17) is arranged between the two lock tongues (8);

a mounting hole (18) is formed in the side wall of the sleeve (13) and corresponds to the bolt through hole (7), and the end of the bolt (8) extends out of the mounting hole (18); when the driving rod (14) rotates, the driving rod is used for driving the two lock tongues (8) to move away from or approach each other along the second radial direction.

7. Mounting base for mounting an extra-cabin tool according to claim 6, characterised in that the side wall of the bushing (13) and remote from the mounting hole (8) is provided with a first adjustment hole (19); one end, far away from the U-shaped piece (15), of the driving rod (14) is coaxially provided with a twisting sleeve (20), a shifting rod (21) used for driving the twisting sleeve (20) to rotate is fixedly installed on the side wall of the twisting sleeve (20), and the other end of the shifting rod (21) extends out of the first adjusting hole (19).

8. Mounting base for mounting an extra-cabin tool according to claim 7, characterised in that the torsion sleeve (20) is provided with a number of ball grooves (26) along its circumference; a second adjusting hole (22) is formed in the side wall of the sleeve (13), a fixing sleeve (23) is installed in the second adjusting hole (22), and a pin (24) which is matched and locked with the ball groove (26) is arranged in the fixing sleeve (23); a second spring (25) is arranged between the pin (24) and the fixed sleeve (23);

when the twist sleeve (20) is rotated to a first state, the pin (24) can be inserted into the ball groove (26);

when the twist sleeve (20) is rotated to a second state, the pin (24) can slide out of the ball groove (26).

9. The mounting base for mounting an extra-vehicular tool according to claim 8, characterized in that a paddle (27) is rotatably connected to a side wall of the sleeve (13);

when the pick (27) is rotated to a first position, the pick (27) is moved away from the pin (24);

when the shifting piece (27) rotates to the second position, the shifting piece (27) is abutted to one end, far away from the ball groove (26), of the pin (24) so as to limit the rotation of the torsion sleeve (20).

10. The mounting base for mounting an extra-cabin tool according to any one of claims 5 to 9, characterized in that a fixing ring (29) is sleeved on the side wall of the sleeve (13), the projection (5) is mounted on the fixing ring (18), and a reinforcing rib (30) is mounted between the fixing ring (29) and the side wall of the sleeve (13).