Hot knife device
By designing a simplified hot knife device, the sliding combination of the slide chute and guide block is used to solve the problem of many parts and easy damage in the existing hot knife device, the accuracy of cutting ropes and the reliability of the device are achieved, and the risk of spacecraft failure is avoided.
Patent Information
- Application Number
- CN202422199459.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-06
AI Technical Summary
When used in spacecraft, existing hot knife devices have many parts and complex structures, which are prone to damage, and the cutting ropes are not accurate enough, which may lead to the problem of not being able to release the spacecraft.
A heat knife device including a base, a compression spring, a guide block and a heating assembly is designed. The sliding fit of the slide chute and a guide block is used to achieve stable movement of the heating assembly, reduce parts, improve the accuracy of cutting ropes, and improve the safety and reliability of the device through the limiting part and the circular storage hole.
The hot knife device has a simple structure, is not easy to damage, and has accurate cutting of ropes, which reduces the risk of spacecraft being unable to release and improves service life and reliability.
Smart Images
Figure CN223187685U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of aviation equipment, and in particular to a hot knife device. Background Art
[0002] Compression release devices are common in the aerospace industry, primarily used to unlock components on spacecraft that need to be separated or deployed. Currently, the main types of unlocking devices used in compression release devices include pyrotechnics and non-pyrotechnics. Pyrotechnics have a large unlocking impact and are relatively expensive. Non-pyrotechnics primarily include motors, electromagnetics, paraffin wax, thermal fuses, and SMAs. Thermal fuses utilize a hot knife device mounted on the device that compresses and retracts the rope, melting the rope to achieve unlocking. Existing hot knife devices generally have many parts and a complex structure, making them susceptible to damage after prolonged use. Utility Model Content
[0003] The purpose of this application is to provide a hot knife device to address at least one technical problem involved in the background technology.
[0004] In order to achieve the above objectives, this application adopts the following technical solutions:
[0005] The present application provides a hot knife device, comprising a base, a compression spring, a guide block and a heating assembly, the base comprising a bottom plate and a slide groove and a stop block installed on the bottom plate, the slide groove extends in a first direction, one end of the slide groove is fixed to the stop block in the first direction, the guide block and the slide groove slide together in the first direction, one end of the compression spring is fixed to the guide block, and the other end of the compression spring is fixed to the stop block, the heating assembly comprises an insulating seat and a heating wire installed on the insulating seat, the insulating seat is fixed to the guide block, the heating wire comprises a cutting portion, and the cutting portion is located at one end of the insulating seat away from the stop block in the first direction.
[0006] Optionally, a limiting portion is provided at one end of the sliding slot away from the stop block in the first direction, and the limiting portion is used to abut against the guide block to keep the compression spring in a compressed state.
[0007] The beneficial effect of this technical solution is that: in this way, the guide block and the limiting part are in a state of pressure contact, which makes it difficult for the guide block and the base to shake relative to each other, and is in a stable and compact state, thereby making it difficult for the guide block and the base to shake relative to each other and cause wear, further reducing the probability and frequency of damage to the hot knife device.
[0008] Optionally, a circular receiving hole is formed on the stop block, the circular receiving hole is arranged toward the guide block, and one end of the compression spring is located in the circular receiving hole.
[0009] The beneficial effect of this technical solution is that: in this way, the compression spring is engaged with the circular receiving hole, so that the cooperation between the compression spring and the stop block is not easy to fail, the safety and reliability of the hot knife device are improved, and the probability and frequency of damage to the hot knife device are further reduced.
[0010] Optionally, the base includes two slide grooves installed on the bottom plate, the two slide grooves are arranged opposite to each other in the second direction, the guide block is slidably engaged with the two slide grooves, the first direction and the second direction are perpendicular to each other, and the first direction and the second direction are parallel to the bottom plate.
[0011] The beneficial effect of this technical solution is that the movement of the guide block is guided by two slide grooves, which improves the stability of the guide block and the heating component installed on the guide block in moving on the base, makes the guide block less likely to fall off the base, and improves the accuracy of the hot knife device in cutting the rope.
[0012] Optionally, the base also includes two bosses installed on the bottom plate, and in the first direction, the two bosses are located in the middle of the bottom plate, and in the second direction, a gap is left between the two bosses, and the gap is slidably engaged with the guide block. A mounting through hole is formed on both bosses, and the mounting through hole passes through the base in a third direction, and the third direction is perpendicular to the base.
[0013] The beneficial effect of this technical solution is that: in this way, the base can be easily connected to the outside world through the two bosses and the two mounting through holes, thereby facilitating the fixing of the hot knife device to the outside world.
[0014] Optionally, in the second direction, the heating assembly is located between two of the mounting through holes.
[0015] The beneficial effect of this technical solution is that it avoids the heating component from blocking the installation through hole, making it easier for workers to insert tools into the installation through hole to act on the connector in the installation through hole.
[0016] Optionally, the notches of the two slide grooves are arranged opposite to each other, and the guide block includes a main body and four lugs fixed to the main body. Two lugs are provided on each of the two main bodies in the second direction, and lugs are provided on both sides of each boss in the first direction. The distance between the two lugs in the first direction is greater than the size of the boss.
[0017] The beneficial effect of this technical solution is that, when the boss is set, the guide block can still move within a certain range in the first direction, and a part of the boss can be extended into the slide groove, making the layout of the various parts on the base more compact and reducing the space occupied by the base.
[0018] Optionally, the heating assembly further comprises a hot wire seat, which is installed on both sides of the insulating seat in the second direction, the end of the hot wire seat away from the block is the hot wire mating end, and the hot wire mating end protrudes from the insulating seat in the first direction, the heating wire overlaps with both hot wire mating ends, the first direction and the second direction are perpendicular to each other, and the first direction and the second direction are both parallel to the base plate.
[0019] The beneficial effect of this technical solution is that: when the heating wire is overlapped with the two hot wire mating ends, the cutting part is separated from the insulating seat in the first direction, forming an avoidance space for the movement of the cutting part when the rope squeezes the cutting part, thereby enabling the rope cutting to proceed smoothly.
[0020] Optionally, a semicircular notch is formed at one end of the bottom plate away from the stop block in the first direction, and the semicircular notch faces away from the stop block.
[0021] The beneficial effect of this technical solution is that the position of the end of the base plate away from the block in the first direction corresponds to the position of the cutting part, and the provision of a semicircular notch on the base plate forms an avoidance space for the movement of the cutting part when the rope squeezes the cutting part, thereby avoiding interference of the base with the rope and enabling rope cutting to proceed smoothly.
[0022] Optionally, the heating assembly further includes two rivets correspondingly installed on the two hot wire mating ends, an opening is formed at the hot wire mating end, the opening is oriented away from the block, and in the third direction, the rivet is inserted into the opening from one side of the hot wire mating end, and the heating wire overlaps with both rivets.
[0023] The beneficial effect of this technical solution is that compared with the direct overlap between the hot wire mating end and the heating wire, the direct overlap contact area between the rivet and the heating wire is smaller, so that a larger length of the cutting part is in a suspended state, which increases the range in which the cutting part can be used to cut the rope and improves the success rate of cutting the rope.
[0024] Optionally, the heating assembly further includes two hot wire fixing screws, which are located on both sides of the insulating seat in the second direction, and are connected to the two hot wire seats one by one to fix the two ends of the heating wire one by one on the two hot wire seats and keep the heating wire in a tensioned state.
[0025] The beneficial effect of this technical solution is that: in this way, the heating wire can be stably and firmly fixed on the heating wire seat and the insulating seat, and the cutting part is in a tensioned state, so as to improve the success rate of cutting the rope.
[0026] The technical solution provided by this application can achieve at least one of the following beneficial effects:
[0027] The hot knife device provided by the present application is installed on a device for compressing and shrinking the rope when in use, so that the cutting part of the heating wire is placed toward the rope. When the rope needs to be cut, the heating wire is energized to heat the heating wire, and the rope is moved toward the cutting part and contacted with the cutting part to cut the rope, or the hot knife device is moved toward the rope to contact the rope through the cutting part to cut the rope. During the contact with the rope, the compression spring may be compressed within a certain range. After the rope is cut, the compression spring drives the heating component to return to its initial position and prepare for the next cutting. The hot knife device provided by the present application has fewer parts and a relatively simple structure, and is not prone to frequent damage. In addition, the movement of the heating component is guided by the sliding cooperation of the slide groove and the guide block, so that the rope cutting is relatively accurate, and the problem of being unable to release the spacecraft due to cutting the rope is not prone to occur.
[0028] The additional technical features and advantages of this application will be more clearly explained in the following description, or can be understood through the specific practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] To more clearly illustrate the technical solutions of the specific embodiments of this application, the following briefly introduces the drawings required for describing the specific embodiments. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.
[0030] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the hot knife device provided in the present application;
[0031] Figure 2 A schematic diagram of the three-dimensional structure of an embodiment of the base provided in the present application;
[0032] Figure 3 A schematic diagram of the three-dimensional structure of an embodiment of the heating assembly provided in the present application;
[0033] Figure 4 A schematic diagram of the three-dimensional structure of an implementation scheme of the guide block provided in an embodiment of the present application.
[0034] Reference numerals:
[0035] 01. Base; 02. Compression spring;
[0036] 03. Guide block; 04. Heating assembly;
[0037] 05. Boss; 06. Notch;
[0038] 07. Round storage hole; 08. Installation through hole;
[0039] 09. Semicircular notch; 10. Bottom plate;
[0040] 11. Stopper; 12. Slide;
[0041] 13. Cutting part; 14. Heating wire;
[0042] 15. Rivets; 16. Hot wire fixing screws;
[0043] 17. Crimp point; 18. Cable fixing screw;
[0044] 19. Positive wire; 20. Negative wire;
[0045] 21. Insulation seat; 22. Threaded hole;
[0046] 23. Card slot; 24. Lug. DETAILED DESCRIPTION
[0047] The following will clearly and completely describe the technical solution of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.
[0048] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0050] like Figures 1 to 3 As shown, the present application provides a hot knife device, including a base 01, a compression spring 02, a guide block 03 and a heating component 04, the base 01 includes a bottom plate 10 and a slide groove 12 and a stop block 11 installed on the bottom plate 10, the slide groove 12 extends in a first direction, one end of the slide groove 12 is fixed to the stop block 11 in the first direction, the guide block 03 and the slide groove 12 slide together in the first direction, one end of the compression spring 02 is fixed to the guide block 03, and the other end of the compression spring 02 is fixed to the stop block 11, the heating component 04 includes an insulating seat 21 and a heating wire 14 installed on the insulating seat 21, the insulating seat 21 is fixed to the guide block 03, the heating wire 14 includes a cutting portion 13, and the cutting portion 13 is located at the end of the insulating seat 21 away from the stop block 11 in the first direction.
[0051] The hot knife device provided by the present application is installed on the device for compressing and shrinking the rope when in use, so that the cutting part 13 of the heating wire 14 is placed toward the rope. When the rope needs to be cut, the heating wire 14 is energized to heat the heating wire 14, and the rope is moved toward the cutting part 13 and contacts the cutting part 13 to cut the rope, or the hot knife device is moved toward the rope to contact the rope through the cutting part 13 to cut the rope. In the process of contact with the rope, the compression spring 02 may be compressed within a certain range. After the rope is cut, the compression spring 02 drives the heating component 04 to return to its initial position and prepare for the next cutting. The hot knife device provided by the present application has fewer parts and a relatively simple structure, and is not prone to frequent damage. In addition, the sliding cooperation of the slide groove 12 and the guide block 03 is used to guide the movement of the heating component 04, so that the rope cutting is relatively accurate, and it is not easy to have the problem of being unable to release the spacecraft due to cutting the rope.
[0052] Optionally, a limiter is provided at one end of the slideway 12 in the first direction, away from the stopper 11. The limiter is configured to abut against the guide block 03 to compress the compression spring 02. This creates a pressure-contact state between the guide block 03 and the limiter, preventing relative movement between the guide block 03 and the base 01, maintaining a stable and compact state. This further reduces relative movement between the guide block 03 and the base 01, which can lead to wear and tear, further reducing the probability and frequency of damage to the hot knife device.
[0053] Optionally, a circular receiving hole 07 is formed on the stopper 11, the circular receiving hole 07 being disposed toward the guide block 03, with one end of the compression spring 02 positioned within the circular receiving hole 07. This allows the compression spring 02 to engage with the circular receiving hole 07, making the fit between the compression spring 02 and the stopper 11 less susceptible to failure, thereby improving the safety and reliability of the hot knife device and further reducing the probability and frequency of damage to the hot knife device. In this embodiment of the present application, preferably, a slot 23 for engaging with the compression spring 02 is also provided on one end of the guide block 03 and the insulating seat 21 near the stopper 11. The compression spring 02 engages with the slot 23, further improving the safety and reliability of the hot knife device.
[0054] Optionally, the base 01 includes two slide grooves 12 mounted on the bottom plate 10. The two slide grooves 12 are arranged relative to each other in the second direction. The guide block 03 slidably engages with both slide grooves 12. The first direction and the second direction are perpendicular to each other, and both the first direction and the second direction are parallel to the bottom plate 10. The two slide grooves 12 guide the movement of the guide block 03, thereby improving the stability of the guide block 03 and the heating assembly 04 mounted on the guide block 03 while moving on the base 01, making it less likely for the guide block 03 to fall off the base 01, and improving the accuracy of the hot knife device in cutting the rope.
[0055] Optionally, the base 01 further includes two bosses 05 mounted on the bottom plate 10. In the first direction, the two bosses 05 are located in the middle of the bottom plate 10. In the second direction, a gap is left between the two bosses 05, which slidably engages with the guide block 03. Mounting holes 08 are formed on both bosses 05. The mounting holes 08 extend through the base 01 in a third direction perpendicular to the base 01. Thus, the two bosses 05 and the two mounting holes 08 facilitate connection of the base 01 to the outside world, thereby facilitating the fixing of the hot knife device to the outside world.
[0056] Optionally, in the second direction, the heating assembly 04 is located between the two mounting holes 08. In this way, the heating assembly 04 is prevented from blocking the mounting holes 08, making it easier for a worker to insert a tool into the mounting holes 08 to act on the connectors therein.
[0057] Optionally, the notches of the two chutes 12 are arranged relative to each other, and the guide block 03 includes a main body and four lugs 24 fixed to the main body. In the second direction, two lugs 24 are provided on each of the two sides of the main body, and in the first direction, lugs 24 are provided on both sides of each of the bosses 05. In the first direction, the distance between the two lugs 24 is greater than the size of the boss 05. In this way, when the boss 05 is provided, the guide block 03 can still move within a certain range in the first direction, and a part of the boss 05 can be extended into the chute 12, making the layout of the various parts on the base 01 more compact and reducing the space occupied by the base 01. In the embodiment of the present application, preferably, a through hole is provided on the insulating seat 21, and a threaded hole 22 is provided on the main body of the guide block 03, and a bolt passes through the through hole on the insulating seat 21 and is threadedly connected to the threaded hole 22 on the guide block 03. In the embodiment of the present application, the insulating seat 21 is made of non-conductive heat-insulating material. Preferably, a notch 06 is provided on the side wall of the slide 12, through which the lug 24 can enter and exit the slide 12. Two notches 06 are provided on each side of the slide 12, and the two notches 06 are located on both sides of the corresponding boss 05 in the first direction.
[0058] Optionally, the heating assembly 04 further includes a hot wire holder 25, which is installed on both sides of the insulating seat 21 in the second direction. The end of the hot wire holder 25 away from the block 11 is the hot wire mating end. In the first direction, the hot wire mating end protrudes from the insulating seat 21. The heating wire 14 overlaps with both of the hot wire mating ends. The first direction and the second direction are perpendicular to each other, and both the first direction and the second direction are parallel to the bottom plate 10. In this way, when the heating wire 14 overlaps with both of the hot wire mating ends, the cutting portion 13 is separated from the insulating seat 21 in the first direction, forming an escape space for the movement of the cutting portion 13 when the rope squeezes the cutting portion 13, thereby enabling the rope cutting to proceed smoothly. In the embodiment of the present application, preferably, a right-angled groove is formed on both sides of the insulating seat 21 in the second direction, and the hot wire holder 25 is installed in the right-angled groove.
[0059] In the embodiment of the present application, a semicircular notch 09 is preferably formed on the end of the base plate 10 away from the stopper 11 in the first direction, with the semicircular notch 09 facing away from the stopper 11. The position of the end of the base plate 10 away from the stopper 11 in the first direction corresponds to the position of the cutting portion 13. The provision of the semicircular notch 09 creates a clearance space on the base plate 10 for the cutting portion 13 to move when the rope presses against the cutting portion 13, thereby preventing interference between the base 01 and the rope and enabling smooth rope cutting.
[0060] Optionally, the heating assembly 04 further includes two rivets 15 mounted in a one-to-one correspondence at the two hot wire mating ends. An opening is formed at each hot wire mating end, the opening facing away from the block 11. In the third direction, the rivets 15 are inserted into the opening from one side of the hot wire mating end, and the heating wire 14 overlaps both rivets 15. Compared to directly overlapping the hot wire mating end and the heating wire 14, the direct overlapping contact area between the rivets 15 and the heating wire 14 is smaller, allowing a greater length of the cutting portion 13 to remain suspended, thereby increasing the range over which the cutting portion 13 can cut the rope and improving the success rate of rope cutting.
[0061] Optionally, the heating assembly 04 further includes two hot wire fixing screws 16, which are located on both sides of the insulating seat 21 in the second direction. The two hot wire fixing screws 16 are connected to the two hot wire seats 25 in a one-to-one correspondence, so as to fix the two ends of the heating wire 14 in a one-to-one correspondence on the two hot wire seats 25 and put the heating wire 14 in a tensioned state. In the embodiment of the present application, the tensioned state refers to the state in which the heating wire 14 is under tension. In this way, the heating wire 14 can be stably and securely fixed to the hot wire seat 25 and the insulating seat 21, and the cutting portion 13 is in a tensioned state, thereby improving the success rate of cutting the rope.
[0062] In the embodiment of the present application, preferably, the positive wire 19 and the negative wire 20 are respectively crimped to the two ends of the heating wire 14 through the crimping points 17, and cable fixing screws 18 are installed on both sides of the insulating seat 21 in the second direction, and the positive wire 19 and the negative wire 20 are respectively fixed on both sides of the insulating seat 21 by two cable fixing screws 18.
[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. Hot knife device, characterized in that, The cam is connected to the guide block and the heating element is installed on the bottom plate. The cam extends in a first direction, and one end of the cam is fixed to the stop block in the first direction. The guide block and the cam slide in cooperation with each other in the first direction. One end of the compression spring is fixed to the guide block, and the other end of the compression spring is fixed to the stop block. The heating element includes an insulating seat and a heating wire installed on the insulating seat. The insulating seat is fixed to the guide block. The heating wire includes a cutting portion. In the first direction, the cutting portion is located at one end of the insulating seat away from the stop block.
2. The hot knife device according to claim 1, characterized in that A limiting portion is provided at one end of the sliding slot away from the stop block in the first direction, and the limiting portion is used to abut against the guide block to keep the compression spring in a compressed state.
3. The hot knife device according to claim 2, characterized in that A circular receiving hole is formed on the stop block, the circular receiving hole is arranged toward the guide block, and one end of the compression spring is located in the circular receiving hole.
4. The hot knife device according to claim 2, characterized in that The base includes two slide grooves installed on the bottom plate, the two slide grooves are arranged opposite to each other in the second direction, the guide block is slidably engaged with the two slide grooves, the first direction and the second direction are perpendicular to each other, and the first direction and the second direction are parallel to the bottom plate.
5. The hot knife device according to claim 4, characterized in that The base also includes two bosses mounted on the bottom plate, and in the first direction, the two bosses are both located in the middle of the bottom plate, and in the second direction, a gap is left between the two bosses, and the gap is slidably engaged with the guide block, and mounting through holes are formed on the two bosses, and the mounting through holes pass through the base in a third direction, and the third direction is perpendicular to the base.
6. The hot knife device according to claim 5, characterized in that In the second direction, the heating assembly is located between the two mounting through holes.
7. The hot knife device according to claim 5, characterized in that The notches of the two slide grooves are arranged opposite to each other, and the guide block includes a main body and four lugs fixed to the main body. Two lugs are provided on each of the two sides of the main body in the second direction, and lugs are provided on both sides of each boss in the first direction. The distance between the two lugs in the first direction is greater than the size of the boss.
8. The hot knife device according to any one of claims 1 to 7, characterized in that The heating assembly also includes a hot wire seat, which is installed on both sides of the insulating seat in the second direction. The end of the hot wire seat away from the block is the hot wire mating end. In the first direction, the hot wire mating end protrudes from the insulating seat. The heating wire overlaps with the two hot wire mating ends. The first direction and the second direction are perpendicular to each other, and the first direction and the second direction are parallel to the bottom plate.
9. The hot knife device according to claim 8, characterized in that The heating assembly also includes two rivets installed one-to-one at the two hot wire mating ends, an opening is formed at the hot wire mating end, the opening is oriented away from the block, and in a third direction, the rivet is inserted into the opening from one side of the hot wire mating end, the heating wire overlaps with the two rivets, and the third direction is perpendicular to the base plate.
10. The hot knife device according to claim 8, characterized in that The heating assembly also includes two hot wire fixing screws, which are located on both sides of the insulating seat in the second direction. The two hot wire fixing screws are connected to the two hot wire seats one by one to fix the two ends of the heating wire on the two hot wire seats one by one and keep the heating wire in a tensioned state.