A fuse-type split nut compression release mechanism

Abstract

The present invention proposes a fuse-type split nut compression and release mechanism, which mainly includes a split nut, a compression ball block, a limiting sleeve, a compression screw, a spring, a fuse device and a fuse rope; the mechanism uses the fuse device, the limiting sleeve and the compression ball block to constrain the split nut as a whole, utilizes the threaded meshing of the compression screw and the split nut and adopts the loading nut to achieve compression, and when unlocking, the fuse device fuses the fuse rope to melt the limiting sleeve under the action of the spring to release the constraint of the split nut, and then releases the connection between the compression screw and the split nut to achieve unlocking. The present invention has the advantages of small impact, light weight, convenient installation, reliable compression and release, good processing technology and economy, etc.

Description

Technical Field

[0001] The invention relates to the technical field of compression and release mechanisms, and in particular to a fuse-type split-flap nut compression and release mechanism. Background Art

[0002] Currently, aerospace products are in a compressed state before launch. Compression is used to meet the compression strength requirements before and during launch, and the release process after entering orbit requires small impact and reliable release. Currently, most compression and unlocking solutions use pyrotechnics such as explosive bolts or separation nuts. These products have a relatively large impact on the products during the unlocking process and are difficult to reuse, especially during ground tests, which has high economic costs. Summary of the invention

[0003] The purpose of the present invention is to provide a fuse-type split nut compression and release mechanism to solve the problem that the compression and release mechanism of aerospace products has a large impact when unlocking and cannot be reused.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: to provide a fuse-type split-petal nut compression and release mechanism for separating aerospace products from a parent spacecraft after entering orbit;

[0005] It includes: a main base 1, a fuse device 2, a sleeve thrust spring 3, a limiting sleeve 4, a spherical washer 5, a connecting screw 6, a screw spring 7, a loading nut 8, a fixing nut 9, a screw spring seat 10, a screw spring seat screw 11, a damping block 12, a damping head cover 13, a damping head cover screw 14, an adapter seat 15, an outer spring limiting seat 16, an outer spring limiting seat screw 17, an upper top block 18, a petal nut 19, a pressing ball block 20, a lower top block 21, a lower top block spring 22, a lower top block spring seat 23, a lower top block spring seat screw 24, a single-hole ball crown block 25, a hollow bolt 26, a hollow bolt locking nut 27, and a fuse rope 28;

[0006] The upper top block 18 is installed at the inner top end of the main base 1, the pressing ball block 20 and the split nut 19 are installed together at the inner middle end of the main base 1, the lower top block 21 is installed at the middle and lower end of the main base 1, the lower top block spring 22 is installed at the lower end of the main base 1 and is located below the lower top block 21, and the lower top block spring seat 23 is installed at the ground part of the main base 1 through the lower top block spring seat screw 24, and compresses the lower top block spring 22;

[0007] The sleeve thrust spring 3 is installed on the outside of the main base 1, the limiting sleeve 4 is installed on the outside of the main base 1 and located above the sleeve thrust spring 3, and the outer spring limiting seat 16 is installed on the top of the main base 1;

[0008] The connecting screw 6 passes through the spherical washer 5, the adapter seat 15, the outer spring limit seat 16 in sequence and is threadedly connected with the split nut 19;

[0009] The loading nut 8 is threadedly connected to the connecting screw 6, and the fixing nut 9 is installed on the connecting screw 6 and presses the loading nut 8;

[0010] The screw spring 7 passes through the lower end of the connecting screw 6 and is installed on the adapter seat 15; the upper end of the screw spring 7 is installed on the screw spring seat 10;

[0011] The screw spring seat 10 is mounted on the connecting screw 6 and fixed by the screw spring seat screw 11;

[0012] The shock absorbing block 12 is mounted on the upper end of the interior of the shock absorbing head cover 13, and the shock absorbing head cover 13 is mounted on the adapter 15 and fixed by the shock absorbing head cover screw 14;

[0013] The fuse device 2 is installed in the grooves on both sides of the main base 1;

[0014] The fuse rope 28 passes through the holes on both sides of the bottom end of the main base 1 and the inner hole of the fuse device 2, then passes through the hollow bolt 26, and finally passes through the hole ball crown block 25 and is tied;

[0015] The hollow bolt locking nut 27 is installed on the hollow bolt 26; the hollow bolt 26 is installed on the limiting sleeve 4;

[0016] The fuse rope 28 is knotted and fixed on the single-hole ball crown block 25, so that the limiting sleeve 4 compresses the thrust spring 3 and constrains it on the boss of the main base 1; the limiting sleeve 4 radially constrains the pressing ball block 20, so that the pressing ball block 20 compresses and constrains the petal nut 19, so that the petal nut 19 has a threaded connection function;

[0017] After the fuse device 2 is powered on and heated, the fuse rope 28 is melted. At this time, the limit sleeve 4 moves upward under the action of the thrust spring 3, and moves to the outer spring limit seat 16 to stop. At this time, the clamping ball block 20 enters the hole designed in the limit sleeve 4, and the split nut 19 loses the radial constraint of the clamping ball block 20; at this time, the lower top block spring 22 pushes the lower top block 21, so that the split nut 19 is radially separated under the action of the lower top block 21 and the upper top block 18, and the connection between the connecting screw 6 and the split nut 19 fails, realizing the unlocking function.

[0018] Furthermore, when the limiting sleeve 4 is located at the lower end of the main base 1, it can radially constrain the compression ball block 20 and compress the split nut 19, so that the split nut 19 can be threadedly engaged with the connecting screw 6, thereby allowing the adapter seat 15 to be compressed with the outer spring limit seat 16 under the action of the loading nut 8.

[0019] Furthermore, when the fusible split nut compression and release mechanism is tightened, the limiting sleeve 4 is positioned on the lower end boss of the main base 1 under the action of the fuse rope 28; the clamping force of the fuse rope 28 on the limiting sleeve 4 can be adjusted by loading the hollow bolt 26, and after the clamping force is appropriately adjusted, the hollow bolt locking nut 27 is used to tighten the hollow bolt 26.

[0020] Furthermore, the fuse device 2 adopts a redundant backup design. When the fuse device 2 is powered on and deheated, one or two fuse ropes 28 are broken, causing the limit sleeve 4 to move upward to the lower end of the outer spring limit seat 16 under the action of the thrust spring 3, and the compression ball block 20 enters the preset hole of the limit sleeve 4, and the split nut 19 loses radial constraint; the split nut 19 is radially separated under the action of the lower top block spring 22, the lower top block 21 and the upper top block 18, and the connecting screw 6 and the split nut 19 are unlocked.

[0021] Furthermore, after the connecting screw 6 and the split nut 19 are unlocked, the connecting screw 6 is lifted under the action of the screw spring 7, so that the connecting screw 6 is completely separated from the main base 1.

[0022] Furthermore, the upper top block 18 is installed in the main base 1, and the upper end of the main base 1 is designed with a pin hole to cooperate with the pin on the upper end of the upper top block 18 to prevent the upper top block 18 from rotating after installation; the lower top block 21 is installed with the main base 1 by groove cooperation, so that the lower top block 21 can only move up and down inside the main base 1 and cannot rotate; the mating surfaces of the upper top block 18 and the lower top block 21 with the split nut 19 are both flat.

[0023] Furthermore, the clamping ball block 20 and the split nut 19 adopt a groove curved surface to cooperate, which not only prevents the clamping ball block 20 from rotating, but also increases the area of ​​the fitting surface; the clamping ball block 20 and the limiting sleeve 4 adopt a groove curved surface to cooperate, increasing the area of ​​the fitting surface.

[0024] The beneficial effects achieved by the fuse-type split-petal nut compression and release mechanism provided by the present invention are:

[0025] (1) The fusible split nut compression and release mechanism provided by the present invention is a fusible split nut compression and release mechanism, which uses a fusible rope to compress the split nut, and then the split nut and the screw are connected to achieve threaded connection compression, and a fusible device is used to melt the fusible rope to achieve the split nut to lose its constraint, and then the spring force is used to open the split nut to complete unlocking;

[0026] (2) The clamping release mechanism adopts a redundant design of the fuse device to improve the reliability of unlocking; the knot point design on the fuse rope prevents the fuse rope from falling out of the connection hole after melting and generating excess;

[0027] (3) The tensioning force of the fuse rope of the compression release mechanism is designed to be adjustable, and the tensioning force of the fuse rope is adjusted by a hollow bolt to prevent insufficient tension of the fuse rope;

[0028] (4) The impact of the clamping release mechanism when unlocking is small and can be reused in ground tests;

[0029] (5) The present invention has the advantages of reliable clamping / unlocking, simple control, convenient installation, good processing technology and economy. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 1 A schematic diagram of the disassembly of the compression and release mechanism of the fusible split-petal nut provided by the present invention;

[0032] Figure 2 A cross-sectional view of the compression state of the compression release mechanism of the fuse-type split-petal nut provided by the present invention;

[0033] Figure 3 A cross-sectional view of the release state of the compression release mechanism of the fuse-type split-petal nut provided by the present invention;

[0034] Figure 4 This is an appearance diagram of the compression and release mechanism of the fusible split nut provided by the present invention.

[0035] Reference numerals:

[0036] 1- Main base 2- Fuse device 3- Sleeve thrust spring

[0037] 4-Limiting sleeve 5-Spherical washer 6-Connecting screw

[0038] 7-screw spring 8-loading nut 9-fixing nut

[0039] 10-screw spring seat 11-screw spring seat screw 12-shock absorber block

[0040] 13-Vibration-damping head cover 14-Vibration-damping head cover screw 15-Adapter

[0041] 16-External spring limit seat 17-External spring limit seat screw 18-Upper top block

[0042] 19-Split nut 20-Compression ball block 21-Lower top block

[0043] 22-lower top block spring 23-lower top block spring seat 24-lower top block spring seat screw

[0044] 25-single hole ball crown block 26-hollow bolt 27-hollow bolt locking nut

[0045] 28-Fuse rope. DETAILED DESCRIPTION

[0046] The fuse-type split nut compression and release mechanism proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0047] The present invention provides a compression and release mechanism of a fusible split-petal nut, comprising: a main base 1, a fuse device 2, a sleeve thrust spring 3, a limiting sleeve 4, a spherical washer 5, a connecting screw 6, a screw spring 7, a loading nut 8, a fixing nut 9, a screw spring seat 10, a screw spring seat screw 11, a damping block 12, a damping head cover 13, a damping head cover screw 14, an adapter seat 15, an outer spring limiting seat 16, an outer spring limiting seat screw 17, an upper top block 18, a split-petal nut 19, a compression ball block 20, a lower top block 21, a lower top block spring 22, a lower top block spring seat 23, a lower top block spring seat screw 24, a single-hole ball crown block 25, a hollow bolt 26, a hollow bolt locking nut 27, and a fusible rope 28;

[0048] The upper top block 18 is installed at the inner top of the main base 1, the compression ball block 20 and the compression split nut 19 are installed at the inner middle end of the main base 1, the lower top block 21 is installed at the middle and lower end of the main base 1, the lower top block spring 22 is installed at the lower end of the main base 1 and below the lower top block 21, and the lower top block spring seat 23 is installed at the bottom of the main base 1 by the lower top block spring seat screw 24, and the lower top block spring 22 is compressed;

[0049] The sleeve thrust spring 3 is installed on the outside of the main base 1, the limiting sleeve 4 is installed on the outside of the main base 1 and above the sleeve thrust spring 3, and the outer spring limiting seat 16 is installed on the top of the main base 1;

[0050] The connecting screw 6 passes through the spherical washer 5, the adapter seat 15, the outer spring limit seat 16 and is threadedly connected with the split nut;

[0051] The loading nut 8 is threadedly connected and installed with the connecting screw 6, and then the fixing nut 9 is also installed on the connecting screw 6 to press the loading nut 8;

[0052] The screw spring 7 passes through the connecting screw 6 and its lower end is mounted on the adapter seat 15; its upper end is mounted on the screw spring seat 10;

[0053] The screw spring seat 10 is installed on the connecting screw 6 and fixed by the screw spring seat screw 11;

[0054] The shock absorbing block 12 is mounted on the inner upper end of the shock absorbing head cover 13, and the shock absorbing head cover 13 is mounted on the adapter 15 and fixed by the shock absorbing head cover screw 14;

[0055] The fuse device 2 is installed in the grooves on both sides of the main base 1;

[0056] The fuse rope 28 passes through the threading holes of the main base 1 at both ends and the inner hole of the fuse device 2, then passes through the hollow bolt 26, and finally the single-hole spherical cap block 25 and is tied;

[0057] The hollow bolt locking nut 27 is installed on the hollow bolt 26 ; the hollow bolt 26 is installed on the limiting sleeve 4 .

[0058] Example 1

[0059] Please refer to Figure 1-4 The multi-point clamping and single-point unlocking release mechanism provided in this embodiment includes a main base 1, a fuse device 2, a sleeve thrust spring 3, a limiting sleeve 4, a spherical washer 5, a connecting screw 6, a screw spring 7, a loading nut 8, a fixing nut 9, a screw spring seat 10, a screw spring seat screw 11, a shock absorbing block 12, a shock absorbing head cover 13, a shock absorbing head cover screw 14, an adapter seat 15, an outer spring limiting seat 16, an outer spring limiting seat screw 17, an upper top block 18, a petal nut 19, a clamping Ball block 20, lower top block 21, lower top block spring 22, lower top block spring seat 23, lower top block spring seat screw 24, single-hole ball crown block 25, hollow bolt 26, hollow bolt locking nut 27, fuse rope 28; the clamping and releasing mechanism provided by the present invention has the advantages of reliable clamping / unlocking, small unlocking impact, simple control, convenient installation, reusability, good processing technology and economy, etc., and is specifically a clamping and releasing mechanism that realizes clamping and releasing through a fuse rope and a petal nut.

[0060] The main base 1 is installed on the star body; the upper top block 18 is installed in the main base 1, and then the petal nut 19 is installed, and then the lower top block 21 is installed, and then the lower top block spring 22 is installed, and then the lower top block spring seat 23 is installed into the lower end of the main base 1 and fixed.

[0061] The fuse device 2 is installed into the card slot of the main base 1;

[0062] The sleeve thrust spring 3 is installed on the main base 1, and then the limiting sleeve 4 is installed on the main base 1, and the pressing ball block 20 is installed at the same time;

[0063] The hollow bolt locking nut 27 is installed on the hollow bolt 26, and then the hollow bolt 26 is installed on the limiting sleeve 4 and ensure that all the threads enter the threaded holes; the fuse rope 28 is installed on the main base 1 and the limiting sleeve 4, and the two ends of the fuse rope 28 are passed through the hollow bolt 26 and the single-hole ball crown block 25 and then a pulling force is applied to ensure that the lower end of the limiting sleeve 4 is pressed tightly against the boss of the main base 1, and then the fuse rope 28 is tied and fixed.

[0064] The outer spring limit seat 16 is installed on the main base 1;

[0065] The connecting screw 6 and the split nut 19 are threadedly connected to the set depth; the adapter seat 15 passes through the connecting screw 6 and is connected with the outer spring limit seat 16 by the taper sleeve; the spherical washer 5 passes through the connecting screw 6 and is matched with the adapter seat 15; then the loading nut 8 and the fixing nut 9 are installed on the connecting screw 6 at the same time;

[0066] The screw spring 7 passes through the connecting screw 6 and is installed in the groove of the adapter seat 15, and then the screw spring seat 10 is installed on the top of the connecting screw 6 and fixed with the screw spring seat screw 11;

[0067] The shock absorbing block 12 is installed at the upper end of the inner part of the shock absorbing head cover 13, and then the shock absorbing head cover 13 is installed on the adapter 15; the adapter 15 is connected to the separation load;

[0068] The working principle of the compression and release mechanism of the fusible split nut provided by the present invention is as follows:

[0069] like Figure 2 As shown in , in the compression state: the connecting screw 6 presses the adapter seat 15 onto the outer spring limit seat 16, and the outer spring limit seat 16 is fixedly connected to the main base 1.

[0070] like Figure 3 As shown in the figure, the unlocked state: the fuse rope 28 is melted, the limit sleeve 4 moves up to the outer spring limit seat 16 under the action of the sleeve thrust spring 3, and the compression ball block 20 releases the constraint on the split nut 19; the split nut 19 is separated under the action of the lower top block spring 22, and the threaded connection between the connecting screw 6 and the split nut 19 fails; the connecting screw 6 is pulled out under the action of the screw spring 7; the adapter seat 15 is out of contact with the outer spring limit seat 16.

[0071] In summary, the present invention provides a compression release mechanism for a fusible split nut, which is a compression release mechanism combining a fuse device with a split nut, which is not only reusable, but also has a small impact when unlocking. The present invention has the advantages of reliable compression / unlocking, small unlocking impact, simple control, convenient installation, reusability, good processing technology and economy, etc.

[0072] When the compression and release mechanism of the fusible split-petal nut provided by the present invention is used to compress small and medium-sized aerospace products before launching them into orbit, it is energized to fuse and unlock after entering orbit, thereby achieving the purpose of separating the small aerospace products from the mother spacecraft.

[0073] The contents not described in detail in this specification belong to the prior art known to those skilled in the art. It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A fuse-type split-petal nut compression and release mechanism, used to separate aerospace products from the parent spacecraft after entering orbit; It is characterized in that include: Main base (1), fuse device (2), sleeve thrust spring (3), limiting sleeve (4), spherical washer (5), connecting screw (6), screw spring (7), loading nut (8), fixing nut (9), screw spring seat (10), screw spring seat screw (11), shock-absorbing block (12), shock-absorbing head cover (13), shock-absorbing head cover screw (14), adapter seat (15), outer spring limiting seat (16), outer spring limiting seat screw (17), upper top block (18), split nut (19), pressing ball block (20), lower top block (21), lower top block spring (22), lower top block spring seat (23), lower top block spring seat screw (24), single-hole ball crown block (25), hollow bolt (26), hollow bolt locking nut (27), and fuse rope (28); The upper top block (18) is installed at the inner top end of the main base (1); the compression ball block (20) compresses the split nut (19) and is installed together at the inner middle end of the main base (1); the lower top block (21) is installed at the middle and lower end of the main base (1); the lower top block spring (22) is installed at the lower end of the main base (1) and is located below the lower top block (21); the lower top block spring seat (23) is installed at the ground part of the main base (1) through the lower top block spring seat screw (24) and compresses the lower top block spring (22); The sleeve thrust spring (3) is mounted on the outside of the main base (1), the limiting sleeve (4) is mounted on the outside of the main base (1) and is located above the sleeve thrust spring (3), and the outer spring limiting seat (16) is mounted on the top of the main base (1); The connecting screw (6) passes through the spherical washer (5), the adapter seat (15), the outer spring limit seat (16) in sequence and is threadedly connected with the split nut (19); The loading nut (8) is threadedly connected to the connecting screw (6), and the fixing nut (9) is installed on the connecting screw (6) and presses the loading nut (8); The screw spring (7) passes through the lower end of the connecting screw (6) and is mounted on the adapter seat (15); the upper end of the screw spring (7) is mounted on the screw spring seat (10); The screw spring seat (10) is mounted on the connecting screw (6) and fixed by the screw spring seat screw (11); The shock absorbing block (12) is mounted on the upper end of the interior of the shock absorbing head cover (13), and the shock absorbing head cover (13) is mounted on the adapter seat (15) and fixed by the shock absorbing head cover screw (14); The fuse device (2) is installed in the grooves on both sides of the main base (1); The fuse rope (28) passes through the threading holes on both sides of the bottom end of the main base (1) and the inner hole of the fuse device (2), then passes through the hollow bolt (26), and finally passes through the single-hole spherical cap block (25) and is tied into a knot; The hollow bolt locking nut (27) is mounted on the hollow bolt (26); the hollow bolt (26) is mounted on the limiting sleeve (4); The fuse rope (28) is knotted and fixed on the single-hole spherical crown block (25), so that the limiting sleeve (4) compresses the thrust spring (3) and is constrained on the boss of the main base (1); the limiting sleeve (4) radially constrains the pressing ball block (20), so that the pressing ball block (20) compresses and constrains the petal nut (19), thereby making the petal nut (19) have a threaded connection function; After the fuse device (2) is powered on and heated, the fuse rope (28) is melted, and at this time the limit sleeve (4) moves upward under the action of the thrust spring (3) and moves to the outer spring limit seat (16) to stop. At this time, the clamping ball block (20) enters the hole designed in the limit sleeve (4), and the split nut (19) loses the radial constraint of the clamping ball block (20); at this time, the lower top block spring (22) pushes the lower top block (21), so that the split nut (19) is radially separated under the action of the lower top block (21) and the upper top block (18), and the connection between the connecting screw (6) and the split nut (19) fails, thereby realizing the unlocking function.

2. The fuse-type split nut compression and release mechanism according to claim 1, characterized in that: When the limiting sleeve (4) is located at the lower end of the main base (1), it can radially constrain the compression ball block (20) and compress the split nut (19), so that the split nut (19) can be threadedly engaged with the connecting screw (6), thereby enabling the adapter seat (15) to be compressed with the outer spring limiting seat (16) under the action of the loading nut (8).

3. The fuse-type split nut compression and release mechanism according to claim 2, characterized in that: When the fuse-type split-flap nut compression release mechanism is compressed, the limit sleeve (4) is located on the lower end boss of the main base (1) at the lower limit of the action of the fuse rope (28); the compression force of the fuse rope (28) on the limit sleeve (4) can be adjusted by adjusting the loading hollow bolt (26); after the compression force is appropriately adjusted, the hollow bolt locking nut (27) is used to compress the hollow bolt (26).

4. The fuse-type split nut compression and release mechanism according to claim 1, characterized in that: The fuse device (2) adopts a redundant backup design. When the fuse device (2) is powered on and heated, the fuse ropes (28) at one or two locations thereof are broken, causing the limit sleeve (4) to move upward to the lower end of the outer spring limit seat (16) under the action of the thrust spring (3), and the compression ball block (20) enters the preset hole of the limit sleeve (4), and the split nut (19) loses radial constraint; the split nut (19) is radially separated under the action of the lower top block spring (22), the lower top block (21) and the upper top block (18), and the connecting screw (6) and the split nut (19) are unlocked.

5. The fuse-type split nut compression and release mechanism according to claim 4, characterized in that: After the connecting screw (6) and the split nut (19) are unlocked, the connecting screw (6) is lifted under the action of the screw spring (7), so that the connecting screw (6) is completely separated from the main base (1).

6. The fuse-type split nut compression and release mechanism according to any one of claims 1 to 5, characterized in that: The upper top block (18) is installed in the main base (1); the upper end of the main base (1) is designed with a pin hole that cooperates with the pin on the upper end of the upper top block (18) to prevent the upper top block (18) from rotating after installation; the lower top block (21) is installed with the main base (1) by groove cooperation, so that the lower top block (21) can only move up and down inside the main base (1) and cannot rotate; the mating surfaces of the upper top block (18) and the lower top block (21) with the split nut (19) are both plane cooperation.

7. The fuse-type split nut compression and release mechanism according to any one of claims 1 to 5, characterized in that: The clamping ball block (20) and the split nut (19) are matched with a grooved curved surface, which not only prevents the clamping ball block (20) from rotating, but also increases the area of ​​the matching surface; the clamping ball block (20) and the limiting sleeve (4) are matched with a grooved curved surface, which increases the area of ​​the matching surface.

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