CN116101519B - Locking device for rotary matching linear displacement motion and space load - Google Patents

Abstract

The invention relates to a locking device for rotary matching linear displacement movement and a space load, wherein the locking device comprises a driving mechanism, a mechanism shell, a rotary limiting column, a spring, a locking disc and a limiting piece, wherein the driving end of the driving mechanism is connected with one axial end of the mechanism shell and drives the mechanism shell to do axial linear movement, and an annular limiting plate is arranged in the mechanism shell; the rotary limiting column is arranged in the annular limiting plate of the mechanism shell in a penetrating way and can axially move in the mechanism shell; the two axial ends of the rotary limiting column are an operation end and a limiting end, a spring is sleeved on the rotary limiting column, and the two ends of the spring are abutted against the operation end and the annular limiting plate; the limiting end penetrates through the annular limiting plate and can be limited on one side surface of the annular limiting plate; the locking disc is movably connected to the peripheral side of the other axial end of the mechanism shell, the limiting piece is fixed on the locking disc and is abutted to the end face of the other axial end of the mechanism shell, a first through hole is formed in the middle of the limiting piece, and the peripheral side of the operating end is limited in the first through hole and can axially slide along the first through hole.

Description

Locking device for rotary matching linear displacement motion and space load

Technical Field

The invention relates to the technical field of space stations, in particular to a locking device for rotary matching linear displacement movement and a space load.

Background

The space station is successfully changed from the construction period to the full-scale investment period, and the experimental concept led by the basic demonstration is gradually changed to the deep exploration direction when the basic supporting equipment is perfected. As research goes deep, experimental conditions will become severe, which also means that a simple single institution design may not completely cover the existing working conditions, and the development is now going to be diversified and customized. The structural mechanism is a carrier and a premise of all scientific experiments, and the implementation of functions such as linear guide, butt locking, rotary positioning and the like is indistinguishable from the design of the mechanism. Along with the complex diversification of experimental requirements, the style and function of the mechanism are also changed to meet the experimental requirements. There is a need for a locking device that captures an experimental object without precise docking, but within a certain range.

The traditional locking mechanism has complex configuration, large occupied volume and high processing precision requirement, has weak pertinence to different working conditions, such as structural rigidity, transmission precision, transmission efficiency, transmission torque and the like, and does not have requirements in all scenes, and in this case, resource waste is caused by the patterned design;

the locking mechanism is generally designed in an electromechanical integrated manner, the coupling is strong, and an operator can hardly solve the problem and replace the problem under the condition that the locking mechanism is out of order, so that the failure of key components can seriously affect the whole system.

Disclosure of Invention

The invention provides a locking device and a space load for rotationally matching with linear displacement motion in order to solve one or more of the technical problems.

The technical scheme for solving the technical problems is as follows: the locking device comprises a driving mechanism, a mechanism shell, a rotary limiting column, a spring, a locking disc and a limiting piece, wherein the driving end of the driving mechanism is connected with one axial end of the mechanism shell and drives the mechanism shell to do axial linear motion, and an annular limiting plate is arranged in the mechanism shell; the rotary limiting column is arranged in the annular limiting plate of the mechanism shell in a penetrating way and can axially move in the mechanism shell;

the two axial ends of the rotary limiting column are an operation end and a limiting end respectively, a spring is sleeved on the rotary limiting column, and the two ends of the spring are respectively abutted against the operation end and the annular limiting plate; the limiting end penetrates through the annular limiting plate and can be limited on one side surface of the annular limiting plate at an initial position and a set position;

the locking disc is movably connected to the circumferential side of the other end of the mechanism shell in the axial direction, the limiting piece is fixed to the locking disc and abuts against the end face of the other end of the mechanism shell in the axial direction, a first through hole used for the operation end to penetrate out is formed in the middle of the limiting piece, and the circumferential side of the operation end is limited in the first through hole and can axially slide along the first through hole.

The beneficial effects of the invention are as follows: the invention provides a small-sized and light locking device, which can reduce the use cost; locking and unlocking can be performed within a certain tolerance range, and the modular design can support on-orbit replacement. The axial operation end of the manual or electric operation rotary limiting column can be used for unlocking, so that the reliability is high, and the unlocking and separating operation can be still completed in a fault mode.

On the basis of the technical scheme, the invention can be improved as follows.

Further, the locking disc comprises two butted half discs, a second through hole for accommodating the operation end is formed after the two half discs are butted, an annular limiting step is arranged in the second through hole, an annular flange edge is arranged at the other axial end of the mechanism shell, and the flange edge is arranged on the annular limiting step;

the limiting sheets are fixedly connected to the two semi-discs, and the flange edges are pressed and connected to the annular limiting steps through the limiting sheets.

The beneficial effects of adopting the further scheme are as follows: the flange edge is matched with the annular limiting step, the limiting piece can be used for limiting the locking disc in a movable mode on the flange edge, and the locking disc can rotate relative to the mechanism shell through pressing the operating end.

Further, the operation end of the rotation limiting column is provided with a tool connector, the tool connector penetrates through the second through hole, and the periphery of the tool connector is limited in the first through hole and can axially slide along the first through hole.

The beneficial effects of adopting the further scheme are as follows: the tool connector is arranged, so that the tool or an electric operation rotary limit column can be conveniently used for pressing or rotating.

Further, the limiting piece comprises two half pieces which are in butt joint, a first through hole for accommodating the operation end is formed after the two half pieces are in butt joint, and the two half pieces are respectively fixed on the locking disc.

The beneficial effects of adopting the further scheme are as follows: through setting up two half, conveniently be connected fixedly with the locking dish, also make things convenient for the holistic dismouting of locking subassembly.

Further, be equipped with first spacing arch in the first through-hole, be equipped with first spacing groove on the week lateral wall of the operation end of rotatory spacing post, first spacing protruding adaptation sets up in the first spacing groove and can follow first spacing groove axial slip.

The beneficial effects of adopting the further scheme are as follows: the first limiting protrusion is matched with the first limiting groove, so that the rotation limiting column can be conveniently utilized to drive the limiting piece and the locking disc to rotate.

Further, be equipped with the spacing arch of second on the week lateral wall of the spacing end of rotatory spacing post, be equipped with the spacing groove of second on the side of annular limiting plate, the spacing protruding of second is in the initial position and rotate can the adaptation spacing after setting for the position in the spacing inslot of second.

The beneficial effects of adopting the further scheme are as follows: the second limiting protrusion is matched with the second limiting groove, so that the limiting end of the rotary limiting column and the limiting fixing of the annular limiting plate can be facilitated.

Further, the second spacing protruding is followed two of the circumference interval arrangement of the spacing end of rotatory spacing post, the second spacing groove is followed the circumference interval arrangement of annular limiting plate is three, and the spacing distance of two adjacent second spacing protruding is the same with the spacing distance of two adjacent second spacing grooves.

The beneficial effects of adopting the further scheme are as follows: the initial position of the rotary limiting column and the rotary limiting column at the set position can be positioned by utilizing the corresponding second limiting groove and the corresponding second limiting protrusion, and the structure is stable and reliable.

Further, the drive mechanism includes a mounting bracket for mounting on the stator and a linear motor for the drive mechanism housing, the linear motor being mounted within the mounting bracket.

The utility model provides a space load, includes foretell locking device, still includes stator and float, the stator has and holds the chamber, the float activity sets up in the chamber holds of stator, the float has 5 position covers of float limit, the float limit cover has the locking hole, mechanism's casing and locking dish on can pass the locking hole, and works as locking dish can laminate on the inside wall of float limit cover under actuating mechanism's drive after rotating to the settlement position.

The beneficial effects of the invention are as follows: the driving mechanism is matched with the float limiting cover, so that the floats can be captured by the stator within a certain range, and accurate guiding is not needed.

0, the driving mechanism is also provided with a micro switch and an electric control mechanism, and the electric control mechanism is divided into two parts

The micro switch is electrically connected with the driving mechanism; a contact disc is arranged on the float limiting cover, and the contact disc is arranged corresponding to the micro switch;

the driving mechanism is used for controlling the locking disc to axially move along the mechanism shell; the touch disc is used for triggering the micro switch when the locking disc is attached to the inner side wall of the float limiting cover, and the electric control mechanism is used for receiving a triggered signal of the micro switch and controlling the driving mechanism to stop running.

The beneficial effects of adopting the further scheme are as follows: the micro switch and the electric control mechanism are adopted, the micro switch is matched with the touch disc, the feedback is obvious, and the locking and unlocking states can be judged under the invisible condition.

Drawings

FIG. 1 is a schematic view of a three-dimensional exploded structure of a locking device of the present invention rotationally coupled with linear displacement movement;

FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;

FIG. 3 is a schematic perspective view of a locking device according to the present invention with a linear displacement motion in combination with rotation;

FIG. 4 is a schematic diagram showing a second perspective structure of the locking device of the present invention in rotation with linear displacement;

FIG. 5 is a schematic diagram showing the front view of the locking device of the present invention in rotation coupled with linear displacement movement;

FIG. 6 is a schematic bottom view of the mechanism housing and locking assembly of the present invention;

FIG. 7 is a schematic cross-sectional view of the mechanism housing and locking assembly of the present invention;

FIG. 8 is a schematic diagram of a cross-sectional structure of a housing and locking assembly of the present invention;

FIG. 9 is a schematic view of a horizontal assembly structure of a locking plate of the present invention;

FIG. 10 is a schematic view of the vertical structure of the locking plate of the present invention;

FIG. 11 is a schematic view of the locking plate of the present invention locked against the inside wall of the float limiting cover;

fig. 12 is a schematic diagram of the unlocking structure of the locking disc and the float limiting cover of the present invention.

In the drawings, the list of components represented by the various numbers is as follows:

11. a mounting bracket; 12. a linear motor; 13. a micro-switch; 14. an electric control mechanism;

20. a locking assembly; 21. a mechanism housing; 22. rotating the limit column; 221. the second limiting bulge; 23. a spring; 24. a half-disc;

25. a half piece; 251. the first limiting protrusion;

26. an annular limiting plate; 27. an annular limit step; 271. the second limit groove; 28. a flange edge; 29. a tool connector; 291. a first limit groove;

4. a float limiting cover; 41. a touch panel; 42. a locking hole; 5. and a connecting seat.

Detailed Description

The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.

As shown in fig. 1 to 12, the locking device for rotationally matching with linear displacement movement in this embodiment includes a driving mechanism, a mechanism housing 21, a rotation limiting post 22, a spring 23, a locking disc and a limiting piece, wherein a driving end of the driving mechanism is connected with one axial end of the mechanism housing 21 and drives the mechanism housing 21 to perform axial linear movement, and an annular limiting plate 26 is arranged in the mechanism housing 21; the rotation limiting post 22 is sleeved in an annular limiting plate 26 of the mechanism shell 21 and can axially move in the mechanism shell 21;

the two axial ends of the rotation limiting column 22 are an operation end and a limiting end respectively, a spring 23 is sleeved on the rotation limiting column 22, and the two ends of the spring 23 are respectively abutted against the operation end and the annular limiting plate 26; the limiting end penetrates through the annular limiting plate 26 and can be limited on one side surface of the annular limiting plate 26 at an initial position and a set position;

the locking disc is movably connected to the circumferential side of the other axial end of the mechanism housing 21, the limiting piece is fixed to the locking disc and abuts against the end face of the other axial end of the mechanism housing 21, a first through hole for the operation end to penetrate out is formed in the middle of the limiting piece, and the circumferential side of the operation end is limited in the first through hole and can axially slide along the first through hole.

The locking assembly of the embodiment can perform linear motion under the driving of the driving mechanism. The working process of the mechanism shell and the locking component is that the rotation limiting post 22 moves along the axial direction of the mechanism shell 21 by pressing the operation end, the spring is extruded, and the limiting ends of the rotation limiting post 22 and the annular limiting plate 26 are released; then the rotation limiting column 22 is rotated again, so that the rotation limiting column 22 drives the limiting sheets and the locking discs which are mutually limited to synchronously rotate, the rotation limiting column 22 rotates from an initial position to a set position, then the operation end is loosened, the limiting end of the rotation limiting column 22 is limited on the annular limiting plate 26 at the set position under the action of the spring, and the locking assembly 20 formed by combining the limiting sheets and the locking discs can be separated from the locking hole 42 in the floater after rotating for a set angle from the original direction; similarly, when the locking assembly 20 is required to be restored to the initial position, the operating end is pressed again, rotated reversely to the initial position, and the limiting end of the rotation limiting post 22 is limited to the initial position of the annular limiting plate 26.

Further, as shown in fig. 1 to 3, the locking disc of the present embodiment includes two half discs 24 that are abutted, a second through hole for accommodating the operation end is formed after the two half discs 24 are abutted, an annular limiting step 27 is disposed in the second through hole, an annular flange edge 28 is disposed at the other axial end of the mechanism housing 21, and the flange edge 28 is disposed on the annular limiting step 27; the limiting pieces are fixedly connected to the two half discs 24, and the flange edges 28 are pressed on the annular limiting steps 27 by the limiting pieces. The flange edge is matched with the annular limiting step, the limiting piece can be used for limiting the locking disc in a movable mode on the flange edge, and the locking disc can rotate relative to the mechanism shell through pressing the operating end.

As shown in fig. 1 and 2, the operation end of the rotation limiting post 22 of the present embodiment is provided with a tool connector 29, the tool connector 29 passes through the second through hole, and the circumferential side of the tool connector 29 is limited in the first through hole and can slide axially along the first through hole. The tool connector is arranged, so that the tool or an electric operation rotary limit column can be conveniently used for pressing or rotating.

As shown in fig. 1 and 2, the limiting plate of this embodiment includes two half plates 25 that are abutted, a first through hole for accommodating the operating end is formed after the two half plates 25 are abutted, and the two half plates 25 are respectively fixed on the locking disc. By arranging two half pieces, the locking device is convenient to connect and fix with the locking disc, and is also convenient for the whole disassembly and assembly of the locking assembly 20.

Wherein, be equipped with the mounting groove on the side that two half-discs 24 deviate from mechanism casing 21, the mounting groove is located around the second through-hole, can install two half-discs 25 respectively in corresponding mounting groove, and every half-disc 25 is fixed with two half-discs 24, and the fixed connection is carried out two half-discs and two half-discs to the fixed mode that can utilize the cross like this. The half piece is driven to rotate by the operation end of the rotation limiting column and drives the locking disc to rotate.

As shown in fig. 1 and 2, a first limiting protrusion 251 is disposed in the first through hole in the present embodiment, a first limiting groove 291 is disposed on a peripheral side wall of the operating end of the rotation limiting post 22, and the first limiting protrusion 251 is adaptively disposed in the first limiting groove 291 and can slide along the first limiting groove 291 in an axial direction. The first limiting protrusion is matched with the first limiting groove, so that the rotation limiting column can be conveniently utilized to drive the limiting piece and the locking disc to rotate.

As shown in fig. 1 and 6, a second limiting protrusion 221 is disposed on a peripheral sidewall of the limiting end of the rotation limiting post 22 in the present embodiment, a second limiting groove 271 is disposed on a side surface of the annular limiting plate 26, and the second limiting protrusion 221 can be adapted to be limited in the second limiting groove 271 after being at an initial position and rotated to a set position. The second limiting protrusion is matched with the second limiting groove, so that the limiting end of the rotary limiting column and the limiting fixing of the annular limiting plate can be facilitated.

As shown in fig. 6, the second limiting protrusions 221 are two second limiting grooves 271 that are arranged at intervals along the circumferential direction of the limiting end of the rotation limiting post 22, and the second limiting grooves 271 are three second limiting protrusions 221 that are arranged at intervals along the circumferential direction of the annular limiting plate 26, and the spacing distance between two adjacent second limiting protrusions 221 is the same as the spacing distance between two adjacent second limiting grooves 271. The initial position of the rotary limiting column and the rotary limiting column at the set position can be positioned by utilizing the corresponding second limiting groove and the corresponding second limiting protrusion, and the structure is stable and reliable. By arranging the three second limiting grooves 271, the clockwise locking and anticlockwise unscrewing can be designed, and only two gears are designed, so that misoperation can be prevented, and the position state can be identified under the invisible condition. When locking and unlocking, the safety is released first to perform the next operation.

The main function of the rotary limiting column is to axially slide by matching with a first limiting groove in the mechanism shell so as to realize positioning between an initial position and a set position.

As shown in fig. 1 to 5, the driving mechanism of the present embodiment includes a mounting bracket 11 for mounting on a stator and a linear motor 12 for driving a mechanism housing, the linear motor 12 being mounted in the mounting bracket 11. Specifically, the driving end of the linear motor 12 is provided with a connecting seat 5, and the mechanism housing 21 is fixed on the connecting seat 5.

The working principle of the locking device of the embodiment is that when the on-track universal tool is pressed, the tool connector drives the rotary limiting column to conduct linear motion, and after reaching the travel position, the tool connector rotates clockwise and anticlockwise as required to reach the set position of the rotary limiting column. And at the same time, the locking disc is released from the limit state and rotates along with the tool connector to enter a locking state or an unlocking state. After the operation is finished, the spring drives the tool connector to return to the initial position and enter the limiting state again. The lock core type design can not be separated from the floats due to the fact that the motor is blocked in a fault mode (attaching position), and only the moment during rotation is needed to be increased.

The embodiment provides a small-sized and light-weight locking device, which can reduce the use cost; locking and unlocking can be performed within a certain tolerance range, and the modular design can support on-orbit replacement. The axial operation end of the manual or electric operation rotary limiting column can be used for unlocking, so that the reliability is high, and the unlocking and separating operation can be still completed in a fault mode.

The embodiment also provides a space load, including foretell locking device, still include stator and float, the stator has the chamber of holding, the float activity sets up in the chamber of holding of stator, the float has float limiting cover 4, float limiting cover 4 has locking hole 42, mechanism housing 21 and locking dish on it can pass locking hole 42, and when locking dish is rotated to the drive of settlement position after can laminating on the inside wall of float limiting cover 4 under actuating mechanism's drive. By means of the drive mechanism, the floats can be caught by the stator within a certain range, and precise guiding is not required.

The locking hole 42 may be a rectangular hole, and the locking assembly may be a strip with a size smaller than that of the rectangular hole, and may enter the locking hole 42 or be limited in the locking hole 42 after being rotated.

As shown in fig. 1 and 3, the driving mechanism of the embodiment is further provided with a micro switch 13 and an electric control mechanism 14, and the electric control mechanism 14 is electrically connected with the micro switch 13 and the driving mechanism respectively; a contact disc 41 is arranged on the float limiting cover 4, and the contact disc 41 is arranged corresponding to the micro switch 13; the driving mechanism is used for controlling the locking disc to axially move along the mechanism shell 21; the touch disc 41 is used for triggering the micro switch 13 when the locking disc is attached to the inner side wall of the float limiting cover 4, and the electric control mechanism 14 is used for receiving the triggered signal of the micro switch 13 and controlling the driving mechanism to stop running. The micro switch and the electric control mechanism are adopted, the micro switch is matched with the touch disc, the feedback is obvious, and the locking and unlocking states can be judged under the invisible condition.

The float limiting cover has the function of limiting the movement range of the float and controlling the movement range within 10mm < 3 >; the contact disc can ensure that the float can be tightly attached to the locking disc on the stator after the contact disc is locked to the position.

The micro switch 13 can be fixed on the driving mechanism through an adjusting component, the adjusting component can be an adjusting block, a long hole is formed in the adjusting block, and the micro switch 13 can be installed in the long hole, so that the position of the micro switch 13 can be adjusted. The main function of the adjusting block is to adjust the height of the micro switch to perform initial calibration of the pretightening force.

The space load in this embodiment has three states, namely, a locking-attaching state, a locking-floating state and an unlocking state, and in the locking-attaching state, as shown in fig. 9 and 11, the locking disc may enter the locking hole 42 of the float limiting cover 4, be limited in the locking hole 42 after rotating, and attach to the inner side wall of the float limiting cover 4. In the locked-floating state, the locking disc can enter the locking hole 42 of the float limiting cover 4 and is limited in the locking hole 42 after rotating, and is not attached to the inner side wall of the float limiting cover 4. The distance exists between the stator and the floater, the floater can move within the range of 10mm3, and the floater cannot be completely separated. In the unlocked state, as shown in fig. 10 and 12, the locking disk can be moved into and out of the locking hole 42 of the float limiting cover 4. When in an unlocking state, the locking disc is in a vertical state and can be completely separated.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (8)

1. The locking device is characterized by comprising a driving mechanism, a mechanism shell, a rotary limiting column, a spring, a locking disc and a limiting piece, wherein the driving end of the driving mechanism is connected with one axial end of the mechanism shell and drives the mechanism shell to do axial linear motion, and an annular limiting plate is arranged in the mechanism shell; the rotary limiting column is arranged in the annular limiting plate of the mechanism shell in a penetrating way and can axially move in the mechanism shell;

the two axial ends of the rotary limiting column are an operation end and a limiting end respectively, a spring is sleeved on the rotary limiting column, and the two ends of the spring are respectively abutted against the operation end and the annular limiting plate; the limiting end penetrates through the annular limiting plate and can be limited on one side surface of the annular limiting plate at an initial position and a set position;

the locking disc is movably connected to the circumferential side of the other axial end of the mechanism shell, the limiting piece is fixed on the locking disc and is abutted to the end face of the other axial end of the mechanism shell, a first through hole for the operation end to penetrate out is formed in the middle of the limiting piece, and the circumferential side of the operation end is limited in the first through hole and can axially slide along the first through hole;

the locking disc comprises two butted half discs, a second through hole for accommodating the operation end is formed after the two half discs are butted, an annular limiting step is arranged in the second through hole, an annular flange edge is arranged at the other end of the mechanism shell in the axial direction, and the flange edge is arranged on the annular limiting step; the limiting sheets are fixedly connected to the two half discs, and the flange edges are pressed on the annular limiting steps by the limiting sheets;

the limiting piece comprises two butted half pieces, a first through hole for accommodating the operation end is formed after the two half pieces are butted, and the two half pieces are respectively fixed on the locking disc.

2. The locking device for rotationally matching linear displacement according to claim 1, wherein the operation end of the rotation limiting post is provided with a tool connector, the tool connector penetrates through the second through hole, and the circumference of the tool connector is limited in the first through hole and can axially slide along the first through hole.

3. The locking device for rotary matching linear displacement according to claim 1, wherein a first limiting protrusion is arranged in the first through hole, a first limiting groove is arranged on the peripheral side wall of the operation end of the rotary limiting column, and the first limiting protrusion is adapted to be arranged in the first limiting groove and can slide along the axial direction of the first limiting groove.

4. The locking device for rotationally matching with linear displacement according to claim 1, wherein a second limiting protrusion is arranged on the peripheral side wall of the limiting end of the rotational limiting column, a second limiting groove is arranged on one side surface of the annular limiting plate, and the second limiting protrusion can be adaptively limited in the second limiting groove after being at an initial position and rotated to a set position.

5. The locking device for rotationally matched linear displacement according to claim 4, wherein the second limiting protrusions are two second limiting grooves which are circumferentially spaced along the limiting end of the rotational limiting column, the second limiting grooves are three second limiting protrusions which are circumferentially spaced along the annular limiting plate, and the spacing distance between every two adjacent second limiting protrusions is the same as the spacing distance between every two adjacent second limiting grooves.

6. A rotationally coupled linear displacement locking device according to claim 1, wherein the drive mechanism comprises a mounting bracket for mounting to the stator and a linear motor for driving the mechanism housing, the linear motor being mounted within the mounting bracket.

7. A space load comprising the locking device of any one of claims 1 to 6, further comprising a stator and a float, wherein the stator has a receiving cavity, the float is movably disposed in the receiving cavity of the stator, the float has a float limiting cover, the float limiting cover has a locking hole, the mechanism housing and a locking disc thereon can pass through the locking hole, and when the locking disc rotates to a set position, the locking disc can be attached to an inner side wall of the float limiting cover under the driving of a driving mechanism.

8. The space load according to claim 7, wherein the driving mechanism is further provided with a micro switch and an electric control mechanism, and the electric control mechanism is electrically connected with the micro switch and the driving mechanism respectively; a contact disc is arranged on the float limiting cover, and the contact disc is arranged corresponding to the micro switch;

the driving mechanism is used for controlling the locking disc to axially move along the mechanism shell; the touch disc is used for triggering the micro switch when the locking disc is attached to the inner side wall of the float limiting cover, and the electric control mechanism is used for receiving a triggered signal of the micro switch and controlling the driving mechanism to stop running.