Guiding constraint structure suitable for zero-gravity environment

Abstract

The invention relates to a guiding and restraining structure suitable for a zero-gravity environment. The guiding and restraining structure comprises a limiting and restraining assembly and a positioning bush. The limiting and restraining assembly comprises an oblique cone guide frame and a limiting reed; the oblique cone guide frame is a transversely-arranged U-shaped frame, and a cone-shaped guide opening is formed in the U-shaped frame. Height guide limiting surfaces are arranged on the inner walls of the 'L'-shaped parts on the two sides of the U-shaped frame; the limiting reed is a U-shaped piece, and the two sides of the U-shaped piece are each provided with a semicircular protrusion. The middle of the positioning bush is of a hollow columnar structure, the upper portion and the lower portion of the hollow columnar structure are both of annular structures, the two opposite sides of the outer edge of the annular structure on the upper portion are flattened, two symmetrical vertical grooves are machined in the outer wall of the hollow columnar structure, and the grooves are matched with the semicircular protrusions of the limiting reed in size. And the grooves and the corresponding flattening parts are positioned on the same side. According to the invention, the technical problem that an astronaut cannot realize rapid and reliable connection and separation of two operation objects in an extravehicular environment is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of space maintenance and relates to a guiding and restraining structure suitable for a zero-gravity environment. Background Art

[0002] With the development of my country's aerospace technology, space maintenance missions in the extravehicular environment involving astronauts will increase day by day.

[0003] In view of the increase in maintenance tasks for extravehicular equipment on the space station, maintenance tools need to be easy to operate, achieve rapid guidance, and provide constraint and fixation functions, so that the two objects being operated can achieve a rapid constraint relationship, making it convenient for astronauts to quickly carry out connection and separation operations in orbit.

[0004] Since there is no gravity outside the vehicle, astronauts can quickly carry out connection and separation operations in orbit. This requires solving the structural form of two object guidance and constraints that astronauts need to easily operate while wearing spacesuits outside the vehicle, and solving the technical problem of achieving fast and reliable connection and separation of the two operating objects. Summary of the invention

[0005] The technical problem solved by the present invention is: to overcome the shortcomings of the existing technology, to propose a guidance and constraint structure suitable for a zero-gravity environment, to solve the technical problem of astronauts realizing the rapid and reliable connection and separation of two operation objects in an extravehicular environment, and to improve the work efficiency of astronauts in an extravehicular environment by reducing the difficulty of extravehicular operations.

[0006] The solution of the present invention is:

[0007] A guiding constraint structure suitable for a zero-gravity environment, comprising a limit constraint component and a positioning bushing;

[0008] The limit constraint assembly includes an oblique cone guide frame and a limit spring; the oblique cone guide frame is a horizontally placed U-shaped frame, and the "|" parts on both sides of the opening end of the U-shaped frame are respectively integrated with inclined surfaces expanding outward to form a cone-shaped guide opening; height guide limit surfaces are arranged on the inner walls of the "|" parts on both sides of the U-shaped frame;

[0009] The limit spring piece is a U-shaped piece, and a semicircular protrusion is designed on each of the "|" parts on both sides of the U-shaped piece. The two semicircular protrusions are symmetrically positioned and the protrusions are opposite in direction. The limit spring piece is fixed inside the oblique cone guide frame and is located below the height guide limit surface.

[0010] The positioning bushing adopts an integrated design, with a hollow cylindrical structure in the middle, and circular ring structures above and below the hollow cylindrical structure. The inner hollow circle diameter of the circular ring structure is the same as the inner diameter of the hollow cylindrical structure, and the two opposite sides of the outer edge of the upper circular ring structure are flattened; two symmetrical vertical grooves are processed on the outer wall of the hollow cylindrical structure, and the grooves match the size of the semicircular protrusions of the limiting spring sheet, and the grooves and the corresponding flattened parts are located on the same side.

[0011] Preferably, a mounting hole is designed at the root of the limiting spring piece, and the limiting spring piece is mounted on the oblique cone guide frame through the mounting hole.

[0012] Preferably, in practical applications, when it is necessary to connect two operation objects, the limit constraint component is fixed on one operation object, and the positioning bushing is fixed on the other operation object.

[0013] Preferably, the oblique cone guide frame provides a guiding function with 2 degrees of freedom.

[0014] Preferably, the positioning bushing is formed by splicing two parts of the same structure, and the cross-section of the positioning bushing is an "I" shape.

[0015] Preferably, the hollow cylindrical structure in the middle of the positioning bushing is a height limit section. When connected, the upper annular structure is located above the height guide limit surface of the oblique cone guide frame, and the hollow cylindrical structure is slidably matched with the lower surface of the height guide limit surface of the oblique cone guide frame.

[0016] Preferably, there is a gap between the hollow columnar structure and the lower surface of the height guide limit surface of the oblique cone guide frame.

[0017] Preferably, the central angle corresponding to the flattened portion on each side of the upper circular ring structure is 90°.

[0018] The beneficial effects of the present invention compared with the prior art are:

[0019] (1) The present invention effectively realizes the rapid positioning of two operation objects through a unique oblique cone guide structure;

[0020] (2) The present invention effectively realizes the connection between the two operating objects through a unique limit constraint structure, and provides a constraint force through the spring limit matching to prevent the two operating objects from floating away; at the same time, the two operating objects can be separated after overcoming the spring deformation constraint force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a guidance constraint structure suitable for a zero-gravity environment;

[0022] Figure 2 It is a schematic diagram of the structure of the limit constraint component;

[0023] Figure 3 The width guide limit surface form and dimension drawing of the oblique cone guide frame;

[0024] Figure 4 It is the form and dimension drawing of the height guide limit surface of the oblique cone guide frame;

[0025] Figure 5 The form and size of the limit spring;

[0026] Figure 6 Schematic diagram of positioning bushing composition

[0027] Figure 7 This is the dimension drawing of the positioning bushing;

[0028] Figure 8 It is a schematic diagram of the matching of the positioning bushing and the limit constraint assembly;

[0029] Fig. 9 It is a schematic diagram of the limiting action surface of the positioning bushing and the limiting constraint assembly. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] The present invention proposes a guidance constraint structure suitable for a zero-gravity environment, which is an important guarantee for ensuring that astronauts can quickly and reliably connect and separate two objects when wearing space suits outside the cabin. It can enable astronauts to quickly and reliably connect and separate two objects in a zero-gravity environment outside the cabin, thereby improving work efficiency and reducing the difficulty of extravehicular operations.

[0032] The invention discloses a guiding constraint structure suitable for a zero-gravity environment, which consists of two parts: a position limiting constraint component and a positioning bushing.

[0033] 1) Limit constraint components

[0034] The limit constraint assembly is composed of an oblique cone guide frame and a limit spring;

[0035] The oblique cone guide frame is a horizontal U-shaped frame. The "|" parts on both sides of the U-shaped frame opening are respectively designed with outward-expanding inclined surfaces to form a conical guide opening; height guide limit surfaces are set on the inner walls of the "|" parts on both sides of the U-shaped frame. The oblique cone guide frame provides a two-degree-of-freedom guiding function. Two outward inclined surfaces are used at the guide opening to achieve width direction guidance, and a downward inclined cone surface is set at the guide opening to achieve height direction guidance. The oblique cone guide frame achieves two-degree-of-freedom direction guidance through the specific structural forms of the width guide limit surface and the height guide limit surface.

[0036] The limiting spring piece is a U-shaped piece. On each side of the "|" part of the U-shaped piece, a semi-circular protrusion is designed. The two semi-circular protrusions are symmetrically positioned and have opposite protrusion directions. The limiting spring piece is fixed inside the inclined cone guide frame and is located below the height guiding limiting surface. The limiting function is achieved by the deformation elasticity of the limiting spring piece matching with the limiting groove of the positioning bushing. An installation hole is designed at the root of the limiting spring piece and is installed on the inclined cone guide frame.

[0037] 2) Positioning bushing.

[0038] The positioning bushing is formed by splicing two "I"-shaped semi-circular parts with the same structure. After splicing, the middle part is a hollow cylindrical structure, and both the upper and lower parts of the hollow cylindrical structure are circular ring structures. The inner diameter of the hollow circle of the circular ring structure is the same as the inner diameter of the hollow cylindrical structure. The two opposite sides of the outer edge of the upper circular ring structure are flattened. Two symmetrical vertical grooves are machined on the outer wall of the hollow cylindrical structure. The grooves match the dimensions of the semi-circular protrusions of the limiting spring piece, and the grooves and the corresponding flattened parts are on the same side. Among them, the middle area of the "I" shape is the height guiding limiting surface, which slides and matches with the height guiding limiting surface of the inclined cone guide frame; the planes on both sides of the upper end surface of the "I" shape are the width guiding limiting surfaces, which slide and match with the width guiding limiting surfaces of the inclined cone guide frame; the limiting groove in the middle of the "I" shape is used for limiting matching with the semi-circular protrusions designed on both sides of the limiting spring piece, and the semi-circular protrusions are constrained in the limiting groove by the elasticity of the spring piece.

[0039] Embodiment:

[0040] The structural form of this embodiment consists of two parts: a limiting and constraining component and a positioning bushing, as Figure 1 shown.

[0041] 1) Limiting and constraining component

[0042] The limiting and constraining component consists of an inclined cone guide frame and a limiting spring piece, as Figure 2 shown.

[0043] The inclined cone guide frame realizes the direction guiding of two degrees of freedom through the specific structural form of the width guiding limiting surface and the height guiding limiting surface; the width guiding limiting surface uses two outer inclined surfaces for guiding, the maximum opening size is 51 mm, the final guiding surface is 30 mm, and the width guiding limiting surface has a 60° deflection angle. As Figure 3 shown.

[0044] The height guiding limiting surface uses one inclined cone inclined surface for guiding, the minimum surface is 2.5 mm, and the final guiding surface is 10.5 mm. As Figure 4 shown.

[0045] The limit spring is designed as a "U"-shaped piece. A semicircular protrusion of R1.6 is designed on both sides of the "U". The distance between the two sides of the "U" is 25mm, which matches the limit groove of the positioning bushing; the root of the limit spring is designed with a mounting hole, which is installed on the oblique cone guide frame, such as Figure 5 shown.

[0046] 2) Positioning bushing.

[0047] The positioning bushing is formed by splicing two "I"-shaped semicircular parts of the same structure, where the middle area of ​​the "I" shape has a control dimension of 13.5mm as the height limit surface, which slides and matches with the height guide limit surface of 10.5mm of the oblique cone guide frame, and a 3.5mm gap is reserved; the plane control dimensions of 30mm on both sides of the upper end face of the "I" shape are the width limit surfaces, which slide and match with the width guide limit surface of 30mm of the oblique cone guide frame; the middle of the "I" shape is a cylinder with a diameter of 25mm, and a limit groove is set on the side of the width guide limit surface. The limit groove is formed by splicing two parts and is triangular in shape with a groove depth of 1.5mm. A semicircle of R1.6 is designed on both sides of the limit spring for limit matching, and the semicircular protrusion is constrained in the limit groove through the elasticity of the spring. Figure 6 , Figure 7 shown.

[0048] 3) Operation process

[0049] A guide constraint structure suitable for a zero-gravity environment is fixed on two operating objects, respectively, the limit constraint component is fixed on the first operating object, and the positioning bushing is fixed on the second operating object. Figure 8 shown.

[0050] Under the action of force F1, the "I"-shaped middle area of ​​the positioning bushing is inserted into the guide opening of the oblique cone guide frame, such as Fig. 9 As shown in (a), under the matching of the width guide limit surface and the height guide limit surface of the oblique cone guide frame, the semicircular protrusion on the side of the limit spring 2 enters the limit groove of the positioning bushing, and finally realizes the guide constraint of the two operation objects, as shown in FIG. Fig. 9 As shown in (b).

[0051] Under the action of force F2, the limiting groove of the positioning bushing moves outward, and the limiting groove shape compresses the semicircular protrusions on both sides of the limiting spring piece to lift up. When the semicircular protrusions on both sides of the compressed limiting spring piece leave the limiting groove, the positioning bushing can be pushed out of the oblique cone guide frame, and finally the separation of the two operation objects is realized, such as Fig. 9 As shown in (c).

[0052] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A guidance and restraint structure suitable for a zero-gravity environment, characterized in that: It includes a limit restraint component and a positioning bushing; The limit constraint assembly includes an oblique cone guide frame and a limit spring; the oblique cone guide frame is a horizontally placed U-shaped frame, and the "|" parts on both sides of the opening end of the U-shaped frame are respectively integrated with inclined surfaces expanding outward to form a cone-shaped guide opening; the inner walls of the "|" parts on both sides of the U-shaped frame are provided with height guide limit surfaces; The limit spring piece is a U-shaped piece, and a semicircular protrusion is designed on each "|" part of the two sides of the U-shaped piece. The two semicircular protrusions are symmetrically positioned and the protrusions are opposite in direction. The limit spring piece is fixed inside the oblique cone guide frame and is located below the height guide limit surface. The positioning bushing adopts an integrated design, with a hollow cylindrical structure in the middle, and an annular structure above and below the hollow cylindrical structure. The inner hollow circle diameter of the annular structure is the same as the inner diameter of the hollow cylindrical structure, and the two opposite sides of the outer edge of the upper annular structure are flattened; Two symmetrical vertical grooves are processed on the outer wall of the hollow columnar structure. The grooves match the size of the semicircular protrusions of the limiting spring sheet, and the grooves and the corresponding flattened parts are located on the same side.

2. The guiding and restraining structure suitable for a zero-gravity environment according to claim 1, characterized in that: A mounting hole is designed at the root of the limiting spring piece, and the limiting spring piece is mounted on the oblique cone guide frame through the mounting hole.

3. The guiding and restraining structure suitable for a zero-gravity environment according to claim 1, characterized in that: In actual applications, when it is necessary to connect two operation objects, the limit constraint component is fixed on one operation object, and the positioning bushing is fixed on the other operation object.

4. The guiding and restraining structure suitable for a zero-gravity environment according to claim 1, characterized in that: The oblique cone guide frame provides a guiding function with 2 degrees of freedom.

5. The guiding and restraining structure suitable for a zero-gravity environment according to claim 1, characterized in that: The positioning bushing is formed by splicing two parts of the same structure, and the cross section of the positioning bushing is an "I" shape.

6. The guiding and restraining structure suitable for a zero-gravity environment according to claim 5, characterized in that: The hollow cylindrical structure in the middle of the positioning bushing is the height limit section. When connected, the upper annular structure is located above the height guide limit surface of the oblique cone guide frame, and the hollow cylindrical structure is slidably matched with the lower surface of the height guide limit surface of the oblique cone guide frame.

7. The guiding and restraining structure suitable for a zero-gravity environment according to claim 6, characterized in that: There is a gap between the hollow columnar structure and the lower surface of the height guide limit surface of the oblique cone guide frame.

8. The guiding and restraining structure suitable for a zero-gravity environment according to claim 1, characterized in that: The central angle corresponding to the flattened portion on each side of the upper circular ring structure is 90°.

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