Double-end fixed type hot knife unlocking device

Abstract

The application provides a double-end fixed type hot knife unlocking device, and belongs to the technical field of hot knife unlocking. It is used for fusing a rope connecting a component to be unlocked and an outer shell, and comprises a base fixed in the inner part of the outer shell and a mounting seat arranged outside the outer shell. The base is provided with a servo rotating mechanism connected with the mounting seat. In the process of rope binding, the rope is only needed to be wound in an S shape around two hot knives. The servo rotating mechanism can automatically tighten the rope. In the later process of fusing the rope, the servo rotating mechanism can also drive the hot knife to actively act, so as to accelerate the cutting speed of the rope. The limiting seat can prevent the rope from falling off the hot knife. The supporting rod can prevent the hot knife assembly from being bent and deformed due to excessive pressure received by the hot knife in the process of tightening. The rope pressing assembly can press different sizes of ropes, so that the rope can be kept at a fixed position on the hot knife, thereby facilitating the fusing of the rope by the hot knife in the later process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hot knife unlocking, and relates to a double-end fixed type hot knife unlocking device. BACKGROUND

[0002] The on-orbit component unlocking device is widely applied to on-orbit separation of a satellite, on-orbit solar sail deployment, on-orbit antenna deployment, on-orbit load deployment and other on-orbit component unlocking scenarios. In the prior art, the traditional unlocking device mainly realizes unlocking through a pyrotechnic product, for example, generates instantaneous high-pressure gas by igniting gunpowder to break off a bolt and push a split nut, so as to realize on-orbit unlocking of the on-orbit component. However, the traditional pyrotechnic unlocking device has problems of excessive impact generated by unlocking, high price, large occupied volume and long supply cycle;

[0003] The hot knife unlocking device is beneficial to high-temperature melting of a rope to realize unlocking of the on-orbit component, and can solve the above problems. In the prior art, when the rope is used to fix the on-orbit component, external equipment needs to be used to realize tightening of the rope, and the roping process is relatively complicated. SUMMARY

[0004] The application aims at the above problems, and provides a double-end fixed type hot knife unlocking device.

[0005] To achieve the above object, the application adopts the following technical scheme:

[0006] A double-end fixed type hot knife unlocking device for melting a rope connecting a component to be unlocked and a shell body, comprising a base fixed in the shell body and a mounting seat arranged outside the shell body, a servo rotating mechanism connected with the mounting seat is arranged on the base, two hot knife assemblies are symmetrically arranged on the mounting seat, the hot knife assembly comprises a fixing seat fixed on the mounting seat and a hot knife fixed on the fixing seat, the rope for fixing the component to be unlocked is arranged in an S shape around the two hot knives, a limiting seat is arranged at the end of the hot knife away from the fixing seat, a supporting rod is further arranged between the two limiting seats, and a rope pressing assembly is arranged on the limiting seat.

[0007] In the double-end fixed type hot knife unlocking device, the servo rotating mechanism comprises a servo motor, a transmission component and a rotating shaft, the outer end of the rotating shaft is detachably connected with the mounting seat, the rotating shaft is power-connected with the servo motor through the transmission component, the base is fixedly connected with a motor seat, and the servo motor is fixed on the motor seat.

[0008] In the double-end fixed type hot knife unlocking device, the transmission component comprises an output gear fixed on the inner end of the rotating shaft and an input gear fixed on the output shaft of the servo motor, and the input gear and the output gear are engaged.

[0009] In the double-end fixed type hot knife unlocking device, the base is detachably fixed on the inner wall of the outer shell through a plurality of bolts; the outer end of the rotating shaft is fixedly connected with a connecting plate; and the connecting plate is detachably connected with the mounting seat through a plurality of bolts.

[0010] In the double-end fixed type hot knife unlocking device, the rope pressing assembly comprises a limiting pressing plate, a plurality of limiting rods are fixedly connected on the limiting pressing plate and inserted into the limiting seat and slidably connected with the limiting seat, and springs are sleeved on the limiting rods at the outer side of the limiting seat and abut against the limiting pressing plate and the limiting seat at both ends.

[0011] In the double-end fixed type hot knife unlocking device, the limiting seat is provided with limiting rod mounting grooves corresponding to the limiting rods, limiting sliding grooves are symmetrically arranged on the two sides of the limiting rod mounting grooves, and limiting sliding blocks are fixedly connected at both ends of the limiting rods and inserted into the limiting sliding grooves.

[0012] In the double-end fixed type hot knife unlocking device, the cross section of the limiting pressing plate is in the shape of a ring, and the hot knife passes through the hollow part of the limiting pressing plate.

[0013] In the double-end fixed type hot knife unlocking device, the mounting seat is provided with a protective cover, the fixing seat in the hot knife assembly is arranged in the protective cover, and the protective cover is provided with a hot knife hole corresponding to the hot knife and a wire hole corresponding to the wire.

[0014] In the double-end fixed type hot knife unlocking device, the fixing seat and the limiting seat are provided with groove bodies for filling a glue fixing layer, and the glue fixing layer is filled between the hot knife and the fixing seat and the limiting seat.

[0015] The glue fixing layer is made of high-temperature resistant insulating glue.

[0016] In the double-end fixed type hot knife unlocking device, the fixing seat and the limiting seat are made of ceramic.

[0017] Compared with the prior art, the double-end fixed type hot knife unlocking device has the following advantages:

[0018] 1. In the rope binding process, the rope is wound around the two hot knives in an S shape, and the servo rotating mechanism can automatically tighten the rope. In the later stage of melting and breaking the rope, the servo rotating mechanism can also drive the hot knife to actively act, thereby accelerating the cutting speed of the rope. The limiting seat can prevent the rope from falling off the hot knife, and the supporting rod can prevent the hot knife assembly from being bent and deformed due to excessive pressure received during the tightening process. The rope pressing assembly can press different sizes of ropes, so that the ropes can be kept in a fixed position on the hot knife, thereby facilitating the melting and breaking of the ropes by the hot knife in the later stage.

[0019] 2, the rope is S-shaped around two hot knives, and the servo motor drives the rotating shaft to rotate through the transmission component, so that the two hot knives on the mounting seat can be driven to rotate along the rotating shaft, so that the rope can be wound on the two hot knives to tighten the rope.

[0020] Other advantages, objects, and features of the application will be apparent from the following specification and claims. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram provided by the application;

[0022] Figure 2 is a sectional view of the hot knife assembly;

[0023] Figure 3 is Figure 1 is an enlarged schematic view of A in

[0024] Figure 4 is a schematic diagram of the external structure of the hot knife assembly.

[0025] In the figure, the shell 1, the base 2, the mounting seat 3, the servo rotating mechanism 4, the hot knife assembly 5, the fixed seat 6, the hot knife 7, the rope 8, the limiting seat 9, the rope pressing assembly 10, the servo motor 11, the transmission component 12, the rotating shaft 13, the output gear 14, the input gear 15, the connecting plate 16, the limiting pressing plate 17, the limiting rod 18, the spring 19, the limiting rod mounting groove 20, the limiting sliding groove 21, the limiting sliding block 22, the shield 23, the wire 24, the glue solid layer 25, and the supporting rod 30. DETAILED DESCRIPTION

[0026] As Figures 1-4 shown, a double-end fixed type hot knife unlocking device for melting the rope 8 connecting the component to be unlocked and the shell 1, including the base 2 fixed inside the shell 1 and the mounting seat 3 arranged outside the shell 1, the base 2 is provided with the servo rotating mechanism 4 connected with the mounting seat 3, the mounting seat 3 is symmetrically provided with two hot knife assemblies 5, the hot knife assembly 5 includes the fixed seat 6 fixed on the mounting seat 3 and the hot knife 7 fixed on the fixed seat 6, the rope 8 for fixing the component to be unlocked is S-shaped around the two hot knives 7, the hot knife 7 away from the fixed seat 6 is provided with the limiting seat 9, the supporting rod 30 is arranged between the two limiting seats 9, and the limiting seat 9 is provided with the rope pressing assembly 10.

[0027] In the present application, the outer shell is a satellite shell, and the component to be unlocked is fixed on the outer shell by a rope. During the roping process, the rope is wound in an S shape around two hot knives 7. The servo rotating mechanism 4 can automatically tighten the rope. When the rope is later melted and cut, the servo rotating mechanism 4 can also drive the hot knife to actively act, thereby accelerating the cutting speed of the rope. The limiting seat can prevent the rope from falling off the hot knife. The supporting rod can prevent the hot knife assembly from being bent and deformed due to excessive pressure received during the tightening process. The rope compression assembly 10 can compress ropes of different sizes and keep the rope in a fixed position on the hot knife, thereby facilitating the later melting and cutting of the rope by the hot knife.

[0028] Specifically, the servo rotating mechanism 4 includes a servo motor 11, a transmission component 12, and a rotating shaft 13. The outer end of the rotating shaft 13 is detachably connected to the mounting seat 3. The rotating shaft 13 is power-connected to the servo motor 11 through the transmission component 12. The base 2 is fixedly connected with a motor seat. The servo motor 11 is fixed on the motor seat. After the rope is wound in an S shape around the two hot knives 7, the servo motor drives the rotating shaft to rotate through the transmission component, which can drive the two hot knives on the mounting seat to rotate along the rotating shaft, thereby enabling the rope to be wound around the two hot knives to tighten the rope.

[0029] Specifically, the transmission component 12 includes an output gear 14 fixed on the inner end of the rotating shaft 13 and an input gear 15 fixed on the output shaft of the servo motor 11. The input gear 15 and the output gear 14 are engaged.

[0030] Preferably, the base 2 is detachably fixed on the inner wall of the outer shell 1 by a plurality of bolts. The outer end of the rotating shaft 13 is fixedly connected with a connecting plate 16. The connecting plate 16 and the mounting seat 3 are detachably connected by a plurality of bolts.

[0031] Specifically, the rope compression assembly 10 includes a limiting pressure plate 17. A plurality of limiting rods 18 are fixedly connected to the limiting pressure plate 17 and inserted into and slidably connected with the limiting seat 9. The limiting rods 18 are sleeved with springs 19 on the outer side of the limiting seat 9. The ends of the springs 19 abut against the limiting pressure plate 17 and the limiting seat 9, respectively. The limiting seat 9 is provided with limiting rod installation grooves 20 corresponding to the limiting rods 18. The limiting rod installation grooves 20 are symmetrically provided with limiting sliding grooves 21 on both sides. The ends of the limiting rods 18 are fixedly connected with limiting sliding blocks 22 inserted into the limiting sliding grooves 21. After the rope is wound around the hot knife, the limiting pressure plate can push the rope to the side of the fixing seat and limit the rope under the action of the spring.

[0032] Specifically, the limiting pressure plate 17 has a circular ring shape in cross-section. The hot knife 7 passes through the hollow part of the limiting pressure plate 17.

[0033] Specifically, the mounting seat 3 is provided with a cover 23, the fixing seat 6 in the hot knife assembly 5 is arranged in the cover 23, and the cover 23 is provided with a hot knife hole corresponding to the hot knife 7 and a wire hole corresponding to the wire 24.

[0034] Specifically, the fixing seat 6 and the limiting seat 9 are provided with a groove for filling the glue fixing layer 25, and the glue fixing layer 25 is filled between the hot knife 7 and the fixing seat 6 and the limiting seat 9.

[0035] Specifically, the glue fixing layer 25 is made of high-temperature-resistant insulating glue.

[0036] Specifically, the fixing seat 6 and the limiting seat 9 are made of ceramic.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0038] Although the housing 1, the base 2, the mounting seat 3, the servo rotating mechanism 4, the hot knife assembly 5, the fixing seat 6, the hot knife 7, the rope 8, the limiting seat 9, the rope pressing assembly 10, the servo motor 11, the transmission component 12, the rotating shaft 13, the output gear 14, the input gear 15, the connecting plate 16, the limiting pressing plate 17, the limiting rod 18, the spring 19, the limiting rod mounting groove 20, the limiting sliding groove 21, the limiting sliding block 22, the cover 23, the wire 24, the glue fixing layer 25, and the support rod 30 are used more frequently herein, the use of these terms is only for more convenient description and explanation of the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A double-end fixed type hot knife unlocking device for fusing a rope (8) connecting a component to be unlocked and an outer housing (1), comprising a base (2) fixed inside the outer housing (1) and a mounting seat (3) arranged outside the outer housing (1), characterized in that, The base (2) is provided with a servo rotating mechanism (4) connected with the mounting seat (3), the mounting seat (3) is provided with two hot knife assemblies (5) symmetrically, the hot knife assembly (5) comprises a fixed seat (6) fixed on the mounting seat (3) and a hot knife (7) fixed on the fixed seat (6), a rope (8) for fixing the component to be unlocked is arranged in S shape around the two hot knives (7), the hot knife (7) is provided with a limiting seat (9) at the end away from the fixed seat (6), a supporting rod (30) is further arranged between the two limiting seats (9), the limiting seat (9) is provided with a rope pressing assembly (10). The servo rotating mechanism (4) comprises a servo motor (11), a transmission component (12) and a rotating shaft (13), the outer end of the rotating shaft (13) is detachably connected with the mounting seat (3), the rotating shaft (13) is power-connected with the servo motor (11) through the transmission component (12), the base (2) is fixedly connected with a motor seat, and the servo motor (11) is fixed on the motor seat. The rope pressing assembly (10) comprises a limiting pressing plate (17), a plurality of limiting rods (18) are fixedly connected with the limiting pressing plate (17) and inserted into the limiting seat (9) and slidably connected with the limiting seat (9), the limiting rod (18) is sleeved with a spring (19) at the outer side of the limiting seat (9), and the two ends of the spring (19) abut against the limiting pressing plate (17) and the limiting seat (9) respectively. The shell body (1) is a satellite shell body, the component to be unlocked is fixed on the shell body (1) through the rope (8), the rope (8) is arranged in S shape around the two hot knives (7) in the process of being bound, the servo rotating mechanism (4) automatically tightens the rope (8), the servo rotating mechanism (4) drives the hot knife (7) to actively act when the rope (8) is melted and broken, the limiting seat (9) prevents the rope (8) from falling off the hot knife (7), the supporting rod (30) prevents the hot knife (7) from being bent and deformed due to excessive pressure in the tightening process, and the rope pressing assembly (10) tightens the rope (8) of different sizes and keeps the rope (8) at the fixed position on the hot knife (7).

2. The double-ended fixed style hot knife unlock device of claim 1, wherein, The transmission component (12) comprises an output gear (14) fixed in the inner end of the rotating shaft (13) and an input gear (15) fixed on the output shaft of the servo motor (11), and the input gear (15) and the output gear (14) are engaged.

3. The double-ended fixed style hot knife unlock device of claim 1, wherein, The base (2) is detachably fixed on the inner wall of the shell body (1) through a plurality of bolts, the outer end of the rotating shaft (13) is fixedly connected with a connecting plate (16), and the connecting plate (16) and the mounting seat (3) are detachably connected through a plurality of bolts.

4. The double-ended fixed style hot knife unlock device of claim 1, wherein, The limiting seat (9) is provided with a limiting rod mounting groove (20) corresponding to the limiting rod (18), limiting sliding grooves (21) are symmetrically arranged on the two sides of the limiting rod mounting groove (20), and limiting sliding blocks (22) are fixedly connected with the two ends of the limiting rod (18) and inserted into the limiting sliding grooves (21).

5. The double-ended fixed hot knife unlock device of claim 1, wherein, The cross section of the limiting pressing plate (17) is circular ring shape, and the hot knife (7) passes through the hollow part of the limiting pressing plate (17).

6. The double-ended fixed hot knife unlocking device according to any one of claims 1-3, wherein, The mounting seat (3) is provided with a cover (23), the fixing seat (6) in the hot knife assembly (5) is arranged in the cover (23), and the cover (23) is provided with a hot knife hole corresponding to the hot knife (7) and a wire hole corresponding to the wire (24).

7. The double-ended fixed hot knife unlocking device according to any one of claims 1-3, wherein, The fixing seat (6) and the limiting seat (9) are provided with a groove for filling the glue fixing layer (25), and the glue fixing layer (25) is filled between the hot knife (7) and the fixing seat (6) and the limiting seat (9). The glue fixing layer (25) is made of high-temperature-resistant insulating glue.

8. The double-ended fixed style hot knife unlock device of claim 1, wherein, The fixing seat (6) and the limiting seat (9) are made of ceramic.

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