CN110873090A

CN110873090A - Strong-connection weak unlocking device

Info

Publication number: CN110873090A
Application number: CN201911043162.2A
Authority: CN
Inventors: 张玺; 魏一; 彭小波
Original assignee: Beijing Interstellar Glory Space Technology Co Ltd
Current assignee: Beijing Interstellar Glory Space Technology Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-03-10

Abstract

The invention provides a strong connection weak unlocking device, which comprises: the first connecting piece is provided with a driving port and a plurality of first grooves; the second connecting piece is provided with a plurality of second grooves, and the second grooves are matched with the first grooves to form locking grooves; the locking body is arranged in the locking groove; the piston is movably arranged in a cavity defined by the first connecting piece and the second connecting piece and is provided with a locking position for connecting the first connecting piece and the second connecting piece and an unlocking position for unlocking the first connecting piece and the second connecting piece, at least part of the outer surface of the piston forms the bottom of the second groove, when the piston is positioned at the locking position, the locking body is limited in the locking groove, and when the driving device drives the piston to move to the unlocking position through the driving port, the locking body leaves the locking groove.

Description

Strong-connection weak unlocking device

Technical Field

The invention relates to the technical field of spacecraft connection and separation structures, in particular to a strong connection weak unlocking device.

Background

In the technical field of spacecraft launching, connecting and unlocking devices occupy an important position. The connecting and unlocking device is used as a key component in the launching stage of the spacecraft, and directly influences whether the space mission can be successfully completed. Such as opening and closing of an automatic machine, interstage separation, solar wing unfolding of a satellite, antenna unfolding and the like.

Most of the traditional initiating explosive devices are driven by the initiating explosive devices, pollution and large impact exist, and the bearing capacity, the unlocking capacity and the impact response are in proportional relation with the explosive amount of the initiating explosive system. The prior art discloses a pneumatic connection unlocking device for the connection, the unblock of two objects, include: the device comprises a cylinder body, a piston assembly, a locking nut, a reset elastic element, a cylinder cover, a connecting and transition screw rod, a pressure plate screw, a cylinder cover screw and a positioning pin; the cylinder block includes: a chamber in which the air inlet nozzle and the piston assembly move linearly; the piston assembly includes: the device comprises a piston, a left sealing ring, a right sealing ring, a multifunctional elastic element, an unlocking and separating push rod and a pressing plate; wherein the piston comprises: the left cylindrical boss, the left cavity, the right cylindrical boss and the inner boss; the outer cylindrical surfaces of the left cylindrical boss and the right cylindrical boss are provided with annular grooves, the left sealing ring is embedded in the annular groove of the left cylindrical boss, and the right sealing ring is embedded in the annular groove of the right cylindrical boss; the multifunctional elastic element and the unlocking and separating push rod are sequentially positioned in the left cavity, the center of the pressing plate is provided with a guide hole for the movement of the unlocking and separating push rod, and the pressing plate is positioned in the right cavity and axially constrained in the piston through a pressing plate screw; the piston assembly, the locking nut and the elastic resetting element are sequentially positioned in a cavity of the cylinder body, 2 positioning pins are axially arranged on the cylinder cover and the cylinder body for positioning and are fixedly connected through a cylinder cover screw, and the piston assembly, the locking nut and the elastic resetting element are restrained in the cylinder body; the screw rod of the connection transition is a double-thread screw rod, one end of the screw rod penetrates through a central hole of the cylinder cover to be connected and locked with the locking nut, and the other end of the screw rod is used for installing the connecting nut of the two objects. The unlocking and separating push rod is matched with the locking nut through a conical surface.

The pneumatic connection unlocking device in the prior art can be used for solving the problem of connection unlocking of two objects with large connecting force and small unlocking force, but when the pneumatic connection unlocking device is locked, the acting force of the elastic element and the multifunctional elastic element needs to be reset to enable the piston to carry out circumferential limiting on the locking nut, the screw rod is locked with the locking nut through the cylinder cover to limit the axial movement of the screw rod; when unlocking, the piston is required to drive the push rod to move to exert axial force and lateral expansion force on the locking nut, so that the locking nut is laterally separated, and then the screw can lose the locking effect of the locking nut. The multifunctional unlocking device has the advantages that the number of parts is large, the structure is complex, in the unlocking and separating process, the unlocking force can be normally unlocked only by overcoming the acting force of the reset elastic element, the multifunctional elastic element and the locking nut, and the required unlocking force is large. And because the push rod is matched with the locking nut through the conical surface, the push rod is easy to be blocked, so that the normal separation cannot be realized.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect of complicated structure of the connection unlocking device in the prior art, and to provide a strong connection weak unlocking device with simple structure.

In order to solve the above technical problem, the present invention provides a strong connection weak unlocking apparatus, including:

the first connecting piece is provided with a driving port and a plurality of first grooves;

the second connecting piece is provided with a plurality of second grooves, and the second grooves are matched with the first grooves to form locking grooves;

the locking body is arranged in the locking groove;

the piston is movably arranged in a cavity defined by the first connecting piece and the second connecting piece and is provided with a locking position for connecting the first connecting piece and the second connecting piece and an unlocking position for unlocking the first connecting piece and the second connecting piece, at least part of the outer surface of the piston forms the bottom of the second groove, when the piston is positioned at the locking position, the locking body is limited in the locking groove, and when the driving device drives the piston to move to the unlocking position through the driving port, the locking body leaves the locking groove.

And in the movable direction of the piston, an elastic piece is arranged between the piston and the first connecting piece and/or between the piston and the second connecting piece.

And a mounting groove is formed in the piston, one end of the elastic piece is arranged in the mounting groove, and the other end of the elastic piece is abutted to the inner wall of the second connecting piece.

The longitudinal section of the first groove is triangular, and the longitudinal section of the second groove is rectangular.

The piston include with the first section of the inner wall contact of first connecting piece, with the second section of the inner wall contact of second connecting piece, lie in on the piston first section with surface between the second section is equipped with first annular, the piston removes extremely during the unblock position, the retainer is located in the first annular.

The first section is connected with the inner wall of the first connecting piece in a sealing mode.

And a second annular groove is formed in the first section, and an annular sealing element is clamped in the second annular groove.

And the second connecting piece is provided with an exhaust port communicated with the cavity.

The driving port is provided with an internal thread.

The locking body is spherical.

The first grooves are annular, the size of the second grooves is matched with that of the lock position bodies, and a plurality of second connecting pieces are arranged in the circumferential direction; or the second groove is annular, the size of the first groove is adaptive to that of the lock position body, and a plurality of first connecting pieces are arranged in the circumferential direction; or the sizes of the first groove and the second groove are both adapted to the lock position body, and a plurality of grooves are arranged in the circumferential direction.

The technical scheme of the invention has the following advantages:

1. according to the strong connection weak unlocking device provided by the invention, when the lock position body is limited in the lock position groove, the outer surface of the piston forms the groove bottom of the second groove, the lock position body cannot leave the lock position groove under the limitation of the piston, the lock position body is simultaneously positioned in the first groove and the second groove, the first connecting piece and the second connecting piece are connected through the lock position body, strong connecting force can be realized, when unlocking is needed, the driving device drives the piston to move to the unlocking position, the lock position body leaves the lock position groove, the unlocking force can realize unlocking only by driving the piston to move, the structure is simple, the unlocking is convenient, and the required unlocking force is small.

2. According to the strong connection weak unlocking device provided by the invention, the elastic piece is arranged between the piston and the first connecting piece and/or between the piston and the second connecting piece in the movable direction of the piston, the acting force of the elastic piece can keep the piston at the locking position, when the driving device drives the piston to move, the piston can be driven to move only by overcoming the elastic force of the elastic piece, and the required unlocking force is small.

3. According to the strong connection weak unlocking device provided by the invention, the piston is provided with the mounting groove, one end of the elastic piece is arranged in the mounting groove, and the other end of the elastic piece is abutted against the inner wall of the second connecting piece, so that the elastic piece is convenient to mount.

4. According to the strong connection weak unlocking device provided by the invention, the longitudinal section of the first groove is triangular, and the longitudinal section of the second groove is rectangular, so that the first groove and the second groove can be conveniently machined on the first connecting piece and the second connecting piece respectively, and the locking body can be conveniently clamped in the locking groove.

5. The invention provides a strong connection weak unlocking device, wherein a piston comprises a first section and a second section, the first section is in contact with the inner wall of a first connecting piece, the second section is in contact with the inner wall of a second connecting piece, a first annular groove is formed in the outer surface of the piston between the first section and the second section, when the piston moves to an unlocking position, a locking body is positioned in the first annular groove, the structure is simple and compact, and due to the fact that the piston is in contact with the inner walls of the first connecting piece and the second connecting piece at the same time, when a driving device is a gas driving device, gas can directly act on the end portion of the piston to push the piston to move, and the unlocking efficiency is higher.

6. According to the strong connection weak unlocking device provided by the invention, the first section is connected with the inner wall of the first connecting piece in a sealing manner, the sealing effect is better, the external energy source can be ensured to be sealed in the piston and the first connecting piece, and other components can not be polluted.

7. According to the strong connection weak unlocking device provided by the invention, the first section is provided with the second annular groove, and the annular sealing element is clamped in the second annular groove, so that the annular sealing element is convenient to mount.

8. According to the strong connection weak unlocking device provided by the invention, the second connecting piece is provided with the exhaust port communicated with the cavity, so that when the annular sealing element fails, external energy can be prevented from being exhausted through the exhaust hole, the smooth moving process of the piston is ensured, and normal separation and unlocking are realized.

9. According to the strong connection weak unlocking device provided by the invention, the driving port is provided with the internal thread, so that the strong connection weak unlocking device can be conveniently connected with a driving device such as an initiating device or a driving air source.

10. According to the strong connection weak unlocking device provided by the invention, the locking body is spherical, the locking body is simple in structure and low in cost.

11. According to the strong connection weak unlocking device provided by the invention, the first groove is annular, the size of the second groove is matched with that of the lock position body, and a plurality of second connecting pieces are arranged in the circumferential direction; or the second groove is annular, the size of the first groove is adaptive to that of the lock position body, and a plurality of first connecting pieces are arranged in the circumferential direction; or the sizes of the first groove and the second groove are matched with the locking body, and a plurality of locking bodies are arranged in the circumferential direction, so that the locking bodies can be prevented from moving in the locking grooves.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a strong link weak unlocking device provided in a first embodiment of the present invention;

description of reference numerals:

1-a first connector; 2-a drive port; 3-a first groove; 4-a second connector; 5-a second groove; 6-a retainer; 7-a piston; 8-an elastic member; 9-mounting grooves; 10-an annular seal; 11-an exhaust port; 71-first section; 72-a second segment; 73-first ring groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a specific embodiment of a strong connection weak unlocking device, as shown in fig. 1, comprising a first connecting member 1, a second connecting member 4, a locking body 6, a piston 7, and an elastic member 8.

The first connecting piece 1 is provided with a driving port 2, the first connecting piece 1 is provided with a plurality of first grooves 3, the second connecting piece 4 is provided with a plurality of second grooves 5, the second grooves 5 are matched with the first grooves 3 to form locking grooves, and the locking bodies 6 are arranged in the locking grooves. In the present embodiment, the first groove 3 is annular, the second groove 5 has a size corresponding to the locking body 6, and a plurality of grooves are provided in the circumferential direction of the second link 4.

The piston 7 is movably arranged in a cavity enclosed by the first connecting piece 1 and the second connecting piece 4 and is provided with a locking position for connecting the first connecting piece 1 with the second connecting piece 4 and an unlocking position for unlocking the first connecting piece 1 with the second connecting piece 4, at least part of the outer surface of the piston 7 forms the bottom of the second groove 5, when the piston 7 is positioned at the locking position, the locking body 6 is limited in the locking groove, and when the driving device drives the piston 7 to move to the unlocking position through the driving port 2, the locking body 6 leaves the locking groove.

As shown in fig. 1, an elastic member 8 is provided between the piston 7 and the second link 4 in the movable direction of the piston 7. Of course, in alternative embodiments, the spring 8 may also be arranged between the piston 7 and the first connecting part 1, or both the spring 8 between the piston 7 and the first connecting part 1 and the spring 8 between the piston 7 and the second connecting part 4. The acting force of the elastic part 8 can keep the piston 7 at the locking position, the structure is stable, when the driving device drives the piston 7 to move, the piston 7 can be driven to move only by overcoming the elastic force of the elastic part 8, and the required unlocking force is small.

In order to facilitate the installation of the elastic element 8, a mounting groove 9 is formed in the piston 7, one end of the elastic element 8 is arranged in the mounting groove 9, and the other end of the elastic element abuts against the inner wall of the second connecting element 4.

In the present embodiment, the first grooves 3 have a triangular longitudinal section, and the second grooves 5 have a rectangular longitudinal section, wherein the longitudinal section is in the direction of the cross section in fig. 1, but in other alternative embodiments, the longitudinal section of the first grooves 3 may have other shapes such as a rectangular shape and a trapezoidal shape.

Piston 7 include with the first section 71 of the inner wall contact of first connecting piece 1, with the second section 72 of the inner wall contact of second connecting piece 4, lie in on the piston 7 first section 71 with surface between the second section 72 is equipped with first annular 73, piston 7 moves to when the unblock position, position of lock body 6 is in first annular 73. Because the piston 7 is simultaneously contacted with the inner walls of the first connecting piece 1 and the second connecting piece 4, when the driving device is a gas driving device, gas can directly act on the end part of the piston 7 to push the piston 7 to move, and the unlocking efficiency is higher.

In this embodiment, the first section 71 is connected to the inner wall of the first connecting member 1 in a sealing manner, so that the sealing effect is good, and it can be ensured that the external energy source is sealed inside the piston 7 and the first connecting member 1, and other components are not polluted. Of course, in an alternative embodiment, there is a gap between the first segment 71 and the inner wall of the first connecting member 1, which does not cause contamination of other components when the driving device directly pushes the piston 7 to move by using a gas driving or driving member.

Specifically, as shown in fig. 1, a second annular groove is formed in the first section 71, the annular sealing element 10 is clamped in the second annular groove, and the annular sealing element 10 is conveniently mounted in the second annular groove.

With further reference to fig. 1, the second connecting member 4 is provided with an exhaust port 11 communicating with the cavity, so that when the annular sealing member 10 fails, external energy can be discharged through the exhaust hole, thereby ensuring that the moving process of the piston 7 is smooth and the separation and unlocking are normal.

In order to be connected with driving devices such as an initiating device or a driving air source and the like conveniently, the driving port 2 is provided with internal threads, and the driving port 2 can be in threaded connection with the driving devices.

In a preferred embodiment, the retainer 6 is spherical.

This weak unlocking device of strong connection is at the during operation, the lock position body 6 is restricted when locking the inslot, because the surface of piston 7 forms the tank bottom in second groove 5, receive the restriction of piston 7, the lock position body 6 can not leave the unlocking groove, the lock position body 6 is located first groove 3 and second inslot 5 simultaneously, first connecting piece 1, second connecting piece 4 passes through lock position body 6 and connects, can realize stronger engaging force, when needing the unblock, drive arrangement drive piston 7 removes to the unblock position, lock position body 6 leaves the unlocking groove, the unblock power only need drive piston 7 and remove and just can realize the unblock, moreover, the steam generator is simple in structure, the unblock is convenient, required unblock power is little. The driving device can be a fire device or a gas driving device.

As a first alternative embodiment of the above embodiment, the second groove 5 is annular, the first groove 3 is sized to the retainer 6, and a plurality of grooves are provided in the circumferential direction of the first connector 1.

As a second alternative embodiment of the above embodiment, the first groove 3 and the second groove 5 are each sized to the retainer 6, and are provided in plurality in the circumferential direction.

As a third alternative embodiment of the above embodiment, the elastic member 8 is not provided, and since at least part of the outer surface of the piston 7 forms the bottom of the second groove 5, the piston 7 is in surface contact with the second connecting member 4, and when the driving device drives the piston 7 to move, the piston can be unlocked only by overcoming the friction force between the piston 7 and the second connecting member 4, and the required unlocking force is small.

As a fourth alternative to the above embodiment, the piston 7 is only in contact with the second connecting member 4, and the first ring groove 73 is not provided thereon, and the capture body 6 falls into the cavity when the piston 7 is moved to the unlocking position.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A strong connection weak unlocking apparatus comprising:

the device comprises a first connecting piece (1), wherein a driving port (2) is formed in the first connecting piece (1), and a plurality of first grooves (3) are formed in the first connecting piece (1);

the second connecting piece (4) is provided with a plurality of second grooves (5), and the second grooves (5) are matched with the first grooves (3) to form locking grooves;

the locking body (6) is arranged in the locking groove;

the piston (7) is movably arranged in a cavity defined by the first connecting piece (1) and the second connecting piece (4), and is provided with a locking position for connecting the first connecting piece (1) and the second connecting piece (4) and an unlocking position for unlocking the first connecting piece (1) and the second connecting piece (4), at least part of the outer surface of the piston (7) forms the bottom of the second groove (5), when the piston (7) is positioned at the locking position, the locking body (6) is limited in the locking groove, and when the driving device drives the piston (7) to move to the unlocking position through the driving port (2), the locking body (6) leaves the locking groove.

2. Strong connection weak unlocking device according to claim 1 characterized in that an elastic member (8) is provided between said piston (7) and said first connecting member (1) and/or between said piston (7) and said second connecting member (4) in the movable direction of said piston (7).

3. A strong connection weak unlocking device according to claim 2 characterized in that said piston (7) is provided with a mounting groove (9), one end of said elastic member (8) is arranged in said mounting groove (9), and the other end abuts against the inner wall of said second connecting member (4).

4. A strong connection weak unlocking means according to claim 2, characterized in that the longitudinal section of said first groove (3) is triangular and the longitudinal section of said second groove (5) is rectangular.

5. A strong connection weak unlocking device according to claim 2, characterized in that said piston (7) comprises a first section (71) in contact with the inner wall of said first connecting member (1), a second section (72) in contact with the inner wall of said second connecting member (4), said piston (7) having a first annular groove (73) on its outer surface between said first section (71) and said second section (72), said retainer (6) being located in said first annular groove (73) when said piston (7) is moved to said unlocking position.

6. A strong connection weak unlocking device according to claim 5 characterized in that said first section (71) is sealingly connected to the inner wall of said first connecting member (1).

7. A strong connection weak unlocking device according to claim 6 characterized in that said first section (71) is provided with a second annular groove, and the annular sealing member (10) is snapped into said second annular groove.

8. A strong connection weak unlocking device according to any of claims 1-7 characterized in that said second connecting member (4) is provided with an air vent (11) communicating with said cavity.

9. A strong connection weak unlocking device according to any of the claims 1-7 characterized in that said driving port (2) is provided with an internal thread.

10. A strong connection weak unlocking device according to any of claims 1-7 characterized in that said retainer (6) is ball-shaped.

11. A strong connection weak unlocking device according to any of claims 1-7 characterized in that said first slot (3) is ring-shaped, said second slot (5) is sized to fit said locking body (6), and is provided in plurality in the circumferential direction of said second connecting member (4); or the second groove (5) is annular, the size of the first groove (3) is adapted to the size of the locking body (6), and a plurality of grooves are arranged in the circumferential direction of the first connecting piece (1); or the sizes of the first groove (3) and the second groove (5) are both adapted to the locking body (6), and a plurality of locking bodies are arranged in the circumferential direction.