Double-end fixed type hot knife unlocking device

Abstract

The invention provides a double-end fixed type heat knife unlocking device, and belongs to the technical field of heat knife unlocking. The fusing device is used for fusing a rope for connecting a part to be unlocked and an outer shell, and comprises a base fixed in the outer shell and a mounting seat arranged outside the outer shell, and a servo rotating mechanism connected with the mounting seat is arranged on the base. In the rope binding process, the rope only needs to be wound around the two heat knives in an S shape, the rope can be automatically bound through the servo rotating mechanism, when the rope is fused in the later period, the servo rotating mechanism can also drive the heat knives to act actively, the cutting speed of the rope is increased, the limiting base can prevent the rope from falling off from the heat knives, and the rope binding efficiency is improved. The supporting rod can prevent the heat knife assembly from being bent and deformed due to the fact that the pressure borne by the heat knife in the tightening process is too large, the rope pressing assembly can press ropes of different sizes, the ropes are kept at the fixed positions on the heat knife, and the ropes can be fused conveniently through the heat knife in the later period.

Description

Technical Field

[0001] The invention belongs to the technical field of hot knife unlocking, and relates to a double-end fixed hot knife unlocking device. Background Art

[0002] On-board component unlocking devices are widely used in on-board component unlocking scenarios such as satellite orbital separation, on-board solar panels deployment, on-board antenna deployment, and on-board payload deployment. In the prior art, traditional unlocking devices mainly use pyrotechnics to achieve unlocking. For example, gunpowder ignition generates instantaneous high-pressure gas to break bolts and push split nuts, thereby achieving on-orbit unlocking of on-board components. However, traditional pyrotechnic unlocking devices have problems such as excessive impact caused by unlocking, high price, large volume occupied, and long delivery cycle;

[0003] The hot knife unlocking device is conducive to high-temperature melting of ropes to achieve unlocking of on-board components, which can solve the above-mentioned problems. In the prior art, when using ropes to fix on-board components, external equipment is required to tighten the ropes, and the rope tying process is relatively cumbersome. Summary of the invention

[0004] The object of the present invention is to provide a double-end fixed hot knife unlocking device in view of the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A double-end fixed hot knife unlocking device, used for melting the rope connecting the part to be unlocked and the outer shell, comprising a base fixed inside the outer shell and a mounting seat arranged outside the outer shell, the base is provided with a servo rotating mechanism connected to the mounting seat, 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 part to be unlocked is arranged in an S shape around the two hot knives, a limiting seat is provided at one end of the hot knife away from the fixing seat, a support rod is also provided between the two limiting seats, and a rope clamping assembly is provided on the limiting seat.

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

[0008] In the above-mentioned double-end fixed hot knife unlocking device, the transmission component includes an output gear fixed to the inner end of the rotating shaft and an input gear fixed to the output shaft of the servo motor, and the input gear and the output gear are meshed.

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

[0010] In the above-mentioned double-end fixed hot knife unlocking device, the rope clamping assembly includes a limit pressure plate, and the limit pressure plate is fixed with a number of limit rods inserted into the limit seat and slidably connected to the limit seat. The limit rod is located on the outer side of the limit seat and is sleeved with a spring, and the two ends of the spring are respectively against the limit pressure plate and the limit seat.

[0011] In the above-mentioned double-end fixed hot knife unlocking device, a limit rod installation groove corresponding to the limit rod is arranged in the limit seat, and limit slide grooves are symmetrically arranged on both sides of the limit rod installation groove. Limit slide blocks inserted into the limit slide grooves are fixedly connected to both ends of the limit rod.

[0012] In the above-mentioned double-end fixed hot knife unlocking device, the cross-section of the limiting pressure plate is circular, and the hot knife passes through the hollow part of the limiting pressure plate.

[0013] In the above-mentioned double-end fixed hot knife unlocking device, a shield is provided on the mounting seat, the fixing seat in the hot knife assembly is provided in the shield, and the shield is provided with a hot knife hole corresponding to the hot knife and a wire hole corresponding to the wire.

[0014] In the above-mentioned double-end fixed hot knife unlocking device, a groove for filling the adhesive layer is provided in the fixing seat and the limiting seat, and the adhesive layer is filled between the hot knife and the fixing seat and the limiting seat;

[0015] The adhesive layer is made of high temperature resistant insulating adhesive.

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

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. During the rope bundling process, the rope only needs to be wound around two hot knives in an S shape. The rope can be automatically tightened by the servo rotating mechanism. When the rope is melted later, the servo rotating mechanism can also drive the hot knife to actively move and speed up the cutting speed of the rope. The limit seat can prevent the rope from falling off the hot knife. The support rod can prevent the hot knife from receiving excessive pressure during the tightening process, which may cause the hot knife assembly to bend and deform. The rope clamping assembly can clamp ropes of different sizes to keep the rope in a fixed position on the hot knife, so that the rope can be melted by the hot knife later.

[0019] 2. After the rope is wound around two hot knives in an S shape, the servo motor drives the rotating shaft through the transmission component to drive the two hot knives on the mounting seat to rotate along the rotating shaft, so that the rope can be wound around the two hot knives to tighten the rope.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram provided by the present invention;

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

[0023] Figure 3 yes Figure 1 The enlarged schematic diagram of point A in the middle;

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

[0025] In the figure, the outer shell 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 limit seat 9, the rope clamping 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 limit pressure plate 17, the limit rod 18, the spring 19, the limit rod mounting groove 20, the limit slide groove 21, the limit slide block 22, the protective cover 23, the wire 24, the adhesive layer 25, and the support rod 30. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 4 As shown, a double-end fixed hot knife unlocking device is used for melting a rope 8 connecting a part to be unlocked and an outer shell 1, comprising a base 2 fixed inside the outer shell 1 and a mounting seat 3 arranged outside the outer shell 1, the base 2 is provided with a servo rotating mechanism 4 connected to the mounting seat 3, two hot knife assemblies 5 are symmetrically arranged on the mounting seat 3, the hot knife assembly 5 comprises a fixing seat 6 fixed on the mounting seat 3 and a hot knife 7 fixed on the fixing seat 6, the rope 8 for fixing the part to be unlocked is S-shaped and wound around the two hot knives 7, a limiting seat 9 is provided at one end of the hot knife 7 away from the fixing seat 6, a support rod 30 is also provided between the two limiting seats 9, and a rope clamping assembly 10 is provided on the limiting seat 9.

[0027] In the present invention, the outer shell is a satellite shell, and the part to be unlocked is fixed to the outer shell by a rope. During the rope binding process, the rope only needs to be wound around two hot knives 7 in an S shape. The rope can be automatically tightened by the servo rotating mechanism 4, and when the rope is melted later, the servo rotating mechanism 4 can also drive the hot knife to actively move, thereby accelerating the cutting speed of the rope. The limit seat can prevent the rope from falling off the hot knife, and the support rod can prevent the hot knife from receiving excessive pressure during the tightening process, causing the hot knife assembly to bend and deform. The rope clamping assembly 10 can clamp ropes of different sizes to keep the rope in a fixed position on the hot knife, so that the rope can be melted by the hot knife later.

[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 connected to the servo motor 11 through the transmission component 12. The base 2 is fixed with a motor seat, and the servo motor 11 is fixed on the motor seat. After the rope is wound around the two hot knives 7 in an S shape, 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, so that the rope can be wound around the two hot knives to tighten the rope.

[0029] Specifically, the transmission component 12 includes an output gear 14 fixed to the inner end of the rotating shaft 13 and an input gear 15 fixed to the output shaft of the servo motor 11 , and the input gear 15 is meshed with the output gear 14 .

[0030] Preferably, the base 2 is detachably fixed to 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, and the connecting plate 16 and the mounting seat 3 are detachably connected by a plurality of bolts.

[0031] Specifically, the rope clamping assembly 10 includes a limiting pressure plate 17, on which a plurality of limiting rods 18 inserted into the limiting seat 9 and slidably connected to the limiting seat 9 are fixedly connected, and the limiting rod 18 is provided with a spring 19 on the outer portion of the limiting seat 9, and the two ends of the spring 19 are respectively against the limiting pressure plate 17 and the limiting seat 9, and the limiting seat 9 is provided with a limiting rod installation groove 20 corresponding to the limiting rod 18, and the limiting rod installation groove 20 is symmetrically provided with limiting slide grooves 21 on both sides, and the two ends of the limiting rod 18 are fixedly connected with limiting sliders 22 inserted into the limiting slide grooves 21. After the rope is wound on the hot knife, the limiting pressure plate can push the rope to one side of the fixed seat under the action of the spring and limit the rope.

[0032] Specifically, the cross section of the limiting pressure plate 17 is in the shape of a circular ring, and the hot knife 7 passes through the hollow portion of the limiting pressure plate 17 .

[0033] Specifically, a shield 23 is provided on the mounting seat 3 , and the fixing seat 6 in the hot knife assembly 5 is provided in the shield 23 . The shield 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, a groove for filling the adhesive layer 25 is provided in the fixing seat 6 and the limiting seat 9, and the adhesive layer 25 is filled between the hot knife 7 and the fixing seat 6 and the limiting seat 9;

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

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

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0038] Although this article uses the outer shell 1, base 2, mounting seat 3, servo rotating mechanism 4, hot knife assembly 5, fixing seat 6, hot knife 7, rope 8, limit seat 9, rope clamping assembly 10, servo motor 11, transmission component 12, rotating shaft 13, output gear 14, input gear 15, connecting plate 16, limit pressure plate 17, limit rod 18, spring 19, limit rod mounting groove 20, limit slide groove 21, limit slider 22, shield 23, wire 24, adhesive layer 25, support rod 30 and the like more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A double-ended fixed hot knife unlocking device, used for melting a rope (8) connecting a part to be unlocked and an outer shell (1), comprising a base (2) fixed inside the outer shell (1) and a mounting seat (3) arranged outside the outer shell (1), characterized in that: The base (2) is provided with a servo rotating mechanism (4) connected to the mounting seat (3); the mounting seat (3) is symmetrically provided with two hot knife assemblies (5); the hot knife assembly (5) comprises a fixing seat (6) fixed on the mounting seat (3) and a hot knife (7) fixed on the fixing seat (6); a rope (8) for fixing the part to be unlocked is arranged in an S shape around the two hot knives (7); a limiting seat (9) is provided at one end of the hot knife (7) away from the fixing seat (6); a support rod (30) is also provided between the two limiting seats (9); and a rope clamping assembly (10) is provided on the limiting seat (9).

2. The double-end fixed hot knife unlocking device according to claim 1, characterized in that: 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 to the mounting seat (3); the rotating shaft (13) is dynamically connected to the servo motor (11) via the transmission component (12); a motor seat is fixedly connected to the base (2); and the servo motor (11) is fixed to the motor seat.

3. The double-end fixed hot knife unlocking device according to claim 2, characterized in that: The transmission component (12) comprises an output gear (14) fixed to the inner end of the rotating shaft (13) and an input gear (15) fixed to the output shaft of the servo motor (11), and the input gear (15) and the output gear (14) are meshed.

4. The double-end fixed hot knife unlocking device according to claim 2, characterized in that: The base (2) is detachably fixed to the inner wall of the outer shell (1) by means of a plurality of bolts; a connecting plate (16) is fixedly connected to the outer end of the rotating shaft (13), and the connecting plate (16) and the mounting seat (3) are detachably connected by means of a plurality of bolts.

5. The double-end fixed hot knife unlocking device according to any one of claims 1 to 4, characterized in that: The rope clamping assembly (10) comprises a limit pressure plate (17), and a plurality of limit rods (18) are fixedly connected to the limit pressure plate (17) and inserted into the limit seat (9) and slidably connected to the limit seat (9). The limit rods (18) are located on the outer side of the limit seat (9) and are sleeved with a spring (19), and the two ends of the spring (19) are respectively against the limit pressure plate (17) and the limit seat (9).

6. The double-end fixed hot knife unlocking device according to claim 5, characterized in that: The limit seat (9) is provided with a limit rod installation groove (20) corresponding to the limit rod (18), and limit slide grooves (21) are symmetrically provided on both sides of the limit rod installation groove (20), and limit sliding blocks (22) inserted into the limit slide grooves (21) are fixedly connected to both ends of the limit rod (18).

7. The double-end fixed hot knife unlocking device according to claim 5, characterized in that: The cross section of the limiting pressure plate (17) is in the shape of a circular ring, and the hot knife (7) passes through the hollow part of the limiting pressure plate (17).

8. The double-end fixed hot knife unlocking device according to any one of claims 1 to 4, characterized in that: The mounting seat (3) is provided with a shield (23), the fixing seat (6) in the hot knife assembly (5) is arranged in the shield (23), and the shield (23) is provided with a hot knife hole corresponding to the hot knife (7) and a wire hole corresponding to the wire (24).

9. The double-end fixed hot knife unlocking device according to any one of claims 1 to 4, characterized in that: A groove body for filling the adhesive layer (25) is arranged inside the fixing seat (6) and the limiting seat (9), and the adhesive layer (25) is filled between the hot knife (7) and the fixing seat (6) and the limiting seat (9); The adhesive layer (25) is made of high temperature resistant insulating adhesive.

10. The double-end fixed hot knife unlocking device according to claim 5, characterized in that: The fixing seat (6) and the limiting seat (9) are made of ceramics.

Images