Aerospace vehicle thermal insulation and sealing elastic internal support structure knitting machine

Abstract

This invention discloses a knitting machine for a thermal insulation and sealing elastic inner support structure for aerospace vehicles, comprising: a frame, a knitting cylinder, a knitting toothed plate, a needle feed cam, multiple needles, a gantry, an elastic structure support, and a drafting mechanism. The drafting mechanism is disposed on the frame and is used to clamp and pull the knitted elastic structure and the mesh sleeve wrapped around the elastic structure. This invention relates to the field of knitting machine technology. By installing the gantry on the knitting toothed plate and rotating it synchronously, the special metal wire is fed in a follow-up manner, enabling the special metal wire to enter the knitting area evenly and stably, effectively solving the problem of uneven knitting of special metal wire. Through the cooperation of the knitting toothed plate, the needle feed cam, and the needles, the regular up-and-down reciprocating motion of the needles on the fixed needle cylinder is achieved. At the same time, the knitting toothed plate drives the gantry to rotate around the elastic structure support to feed the wire, ensuring that the metal wire is always evenly wrapped around the elastic structure support during the knitting process.

Description

Technical Field

[0001] This invention relates to the field of knitting machine technology, specifically to a knitting machine for a thermal insulation and sealing elastic internal support structure for aerospace vehicles. Background Technology

[0002] In the manufacturing process of aerospace vehicles, thermally insulating and sealing elastic structures are among the key components. These are typically formed by weaving special metal wires (such as high-temperature alloy wires and stainless steel wires) into a mesh and wrapping it around an elastic mandrel. Existing weaving equipment has several shortcomings in processing such structures. First, the weaving process suffers from poor stability. Due to the high hardness and brittle surface of the special metal wires, traditional fixed wire guide mechanisms are prone to severe friction and tension fluctuations during high-speed weaving, leading to uneven weaving, inconsistent mesh density, and localized loosening. Second, the woven mesh tube is not perfectly shaped, making it difficult to form a regular circular cross-section. Especially without internal support, the mesh tube is easily flattened or deformed, failing to meet the stringent requirements of aerospace products for a complete circumferential structure. Third, existing equipment lacks effective wire breakage monitoring methods. When the metal wire runs out or breaks unexpectedly, the equipment cannot promptly stop and alarm, resulting in a high scrap rate and even equipment damage.

[0003] Therefore, there is an urgent need for a weaving device that can stably weave special metal wires, ensure the complete circular shape of the mesh, and have an automatic stop function in case of wire breakage, in order to solve the problems existing in the current technology. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a knitting machine for aerospace vehicle thermal insulation and sealing elastic internal support structure, which solves the problems of poor stability, incomplete mesh shape, and failure to promptly alarm when weaving special metal wires using existing knitting devices.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a knitting machine for a thermal insulation and sealing elastic internal support structure for aerospace vehicles, comprising: frame; A knitting syringe, the knitting syringe being disposed on the frame; A braiding toothed plate, which is rotatably mounted on the frame and arranged around the braiding needle cylinder; A needle-feeding cam is disposed on the braiding toothed plate and rotates synchronously with the braiding toothed plate; Multiple needles are mounted on the knitting cylinder and arranged around the circumference of the knitting cylinder, with one end of each needle engaging with the track of the needle feed triangle. A gantry is mounted on the braided toothed plate and rotates synchronously with the braided toothed plate. The gantry is provided with a first magnetic eye for guiding special metal wires. An elastic structural support is provided, which extends through the knitting needle cylinder, and is used to support the inside of the knitted mesh during the knitting process; A drawing mechanism, which is disposed on the frame, is used to clamp and draw the woven net and the elastic structural support wrapped inside the net.

[0006] In some embodiments, the drawing mechanism includes a pair of drawing shafts that can rotate in opposite directions, with bushings fitted on the drawing shafts, the bushings clamping the elastic structural support and a mesh sleeve wrapped around the elastic structural support.

[0007] In some embodiments, the drawing mechanism further includes: A drawing motor, which is mounted on the frame; A sprocket pair is disposed between the output end of the drafting motor and one of the pair of drafting shafts, for driving one of the pair of drafting shafts to rotate; A transmission gear pair is connected to a pair of drawing shafts to enable the two drawing shafts to rotate synchronously in opposite directions.

[0008] In some embodiments, it also includes: A braiding motor, which is mounted on the frame; A synchronous belt pulley pair, which is connected to the output end of the braiding motor; A drive shaft is rotatably mounted on the frame via a bearing housing, and one end of the drive shaft is connected to the synchronous pulley pair; A transmission bevel gear, wherein the transmission bevel gear is disposed at the end of the transmission shaft away from the synchronous belt pulley pair; The braided toothed disc is provided with meshing teeth that mesh with the transmission bevel gear.

[0009] In some embodiments, a boom is also included, one end of which is supported and connected to the elastic structure, and the other end is rotatably connected to the gantry via a bearing.

[0010] In some embodiments, a shuttle rod mounted on the frame is also included, the shuttle rod having a magnet for assisting the needle in opening and a second magnetic eye for guiding the special metal wire.

[0011] In some embodiments, a guide wire disposed on the shuttle rod is further included, the guide wire being used to control the position of the special metal wire entering the padding yarn of the knitting needle cylinder.

[0012] In some embodiments, the yarn feeding path of the braiding device is provided with a yarn breakage stop device and / or a wire breakage stop device to trigger a stop when the metal wire breaks or is exhausted.

[0013] In some embodiments, the device further includes a wire feeding bracket disposed on the outside of the frame and a wire feeding rod disposed inside the frame; The wire feeding bracket is equipped with a thread guide roller, and the wire feeding rod is equipped with a thread guide bearing. The special metal wire enters the gantry after passing through the yarn breakage stop device, the thread guide roller, the yarn breakage stop device, and the thread guide bearing in sequence.

[0014] In some embodiments, the system further includes an electrical control housing, which is mounted on the frame via a threaded connector and is electrically connected to the drawing mechanism.

[0015] (III) Beneficial Effects The beneficial effects of this invention are: The aerospace vehicle heat insulation and sealing elastic internal support structure knitting machine of the present invention realizes the follow-up feeding of special metal wires by installing the gantry on the knitting tooth plate and rotating it synchronously. This greatly reduces the relative friction and tension fluctuation between the metal wire and the guide element, so that the special metal wire can enter the knitting area evenly and stably, effectively solving the problem that special metal wires are not easy to knit evenly.

[0016] By setting up an elastic structure support that runs through the knitting needle cylinder, internal support is provided for the mesh during the knitting process, ensuring that the knitted mesh always maintains a regular circular cross-section. This prevents the mesh tube from being flattened or deformed, guarantees the integrity of the product's circumferential structure, and meets the stringent requirements of the aerospace field for sealed elastic structures.

[0017] By coordinating the braiding toothed plate, the needle feed triangle, and the needle, the regular up-and-down reciprocating motion of the needle on the fixed syringe is achieved, providing the basic action for the braiding of metal wire. At the same time, the braiding toothed plate drives the gantry to rotate around the elastic structure support to feed the wire, so that the braiding action is coordinated with the internal support, ensuring that the metal wire is always evenly wrapped around the outside of the elastic structure support during the braiding process.

[0018] By setting up yarn breakage automatic stop devices and / or wire breakage automatic stop devices on the wire feeding path, the machine can be stopped and alarmed in time when the metal wire is used up or accidentally broken, thus avoiding the generation of waste products and equipment damage, and improving production reliability and safety.

[0019] Furthermore, by using the rotational connection between the hanger and the gantry, along with the clamping of the elastic structural support by the stretching mechanism, an anti-rotation structure with upper suspension and lower clamping is achieved, ensuring that the elastic structural support remains circumferentially stationary during operation. This further guarantees the weaving accuracy. The device has a reasonable structural design and stable operation, making it suitable for the high-quality production of special metal wire braided composite structures for aerospace applications. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the wire feeding bracket of the present invention.

[0022] Figure 3 This is a schematic diagram of the gantry structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the woven part of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the braided motor of the present invention.

[0025] Figure 6 This is a schematic diagram of the drawing mechanism of the present invention.

[0026] Figure 7 This is a schematic diagram of the working process of the present invention.

[0027] In the diagram: 1. Frame; 2. Knitting cylinder; 3. Knitting gear; 4. Needle feed cam; 5. Needle; 6. Gantry; 7. Elastic structural support; 8. Drafting mechanism; 801. Drafting shaft; 802. Bushing; 803. Drafting motor; 804. Sprocket pair; 805. Transmission gear pair; 9. Knitting motor; 10. Synchronous belt pulley pair; 11. Transmission shaft; 12. Bearing housing; 13. Transmission bevel gear; 14. Suspension rod; 15. Shuttle rod; 16. Magnet; 17. First thread guide magnet; 18. Second thread guide magnet; 19. Thread stopper; 20. Key seat; 21. Yarn breakage stopper; 22. Yarn breakage stopper; 23. Yarn feed bracket; 24. Yarn feed rod; 25. Thread guide wheel; 26. Thread guide bearing; 27. Electrical control box. Detailed Implementation

[0028] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The aerospace-grade heat-insulating and sealing elastic internal support structure knitting machine proposed in this invention uses a knitting toothed disc, a needle feed cam, and a fixed knitting cylinder to drive the needles in a regular up-and-down reciprocating motion, providing a stable foundation for the knitting of metal wires. Based on this, a gantry is fixedly installed on the knitting toothed disc and rotates synchronously with it, keeping the special metal wires relatively stationary with the needles before entering the knitting zone. This significantly reduces the relative friction and tension fluctuations between the metal wires and the guide elements, solving the problem of uneven knitting of special metal wires. Simultaneously, by setting an elastic structural support that penetrates the knitting cylinder, internal radial support is provided for the mesh during knitting, ensuring the mesh maintains a regular circular cross-section and preventing the mesh tube from being flattened or deformed, thus guaranteeing the integrity of the product's circumferential structure. Furthermore, yarn breakage automatic stop devices and / or filament breakage automatic stop devices are installed on the yarn feeding path to provide timely alarm and stop when the metal wire breaks or runs out, preventing waste and equipment damage. These technical means work together to solve the technical problems of poor stability, incomplete mesh tube shape, and inability to promptly alarm when filaments break in existing knitting devices.

[0030] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0031] Example 1: Please refer to Figure 1 , Figure 3 as well as Figure 4 The present invention provides a technical solution: a braiding device for a thermal insulation and sealing elastic structure of aerospace vehicles, comprising a frame 1, a braiding cylinder 2, a braiding tooth plate 3, a needle feed triangle 4, multiple needles 5, a gantry 6, an elastic structure support 7, and a drafting mechanism 8.

[0032] The frame 1 is a welded integral structure main chassis with high rigidity and good vibration resistance. It has an internal middle support plate for functional area division. The frame 1 is also equipped with an electrical control box 27 through threaded connectors. The electrical control box 27 is used for the electrical control of the whole machine.

[0033] The knitting needle cylinder 2 has a cylindrical structure with needle grooves on its surface along the circumference. The knitting needle cylinder 2 is fixedly installed on the support plate of the frame 1 and remains stationary during equipment operation.

[0034] The braiding toothed disc 3 is an annular toothed disc, which is rotatably mounted on the braiding disc of the frame 1 via bearings and surrounds the braiding needle cylinder 2. The braiding toothed disc 3 is provided with meshing teeth for receiving power input.

[0035] The needle travel triangle 4 is a part with a cam curve that has high and low undulations. It is fixedly installed on the braiding toothed plate 3 by the key seat 20 and rotates synchronously with the braiding toothed plate 3.

[0036] Multiple needles 5 are knitting needles with pins. Each needle 5 is installed in the needle groove of the knitting needle cylinder 2, and the pin end of the needle 5 is engaged with the track of the needle feed triangle 4.

[0037] The gantry 6 is a gantry-shaped support structure, which is fixedly installed on the braided toothed plate 3 and rotates synchronously with the braided toothed plate 3. The gantry 6 is equipped with a first wire guide magnetic eye 17 for guiding special metal wires.

[0038] The elastic structure support 7 is set through the knitting needle cylinder 2 along the axial direction. During the knitting process, it supports the inside of the knitted mesh to ensure the circular cross-section of the mesh.

[0039] The stretching mechanism 8 is located at the downstream end of the frame 1 and is used to clamp and stretch the woven elastic structure and the mesh sleeve wrapped around it.

[0040] During operation, the knitting motor 9 drives the knitting toothed disc 3 to rotate at a constant speed. The needle feed cam 4 and the mast 6 rotate synchronously with the knitting toothed disc 3. The needles of the needle 5 enter the track of the needle feed cam 4. Since the needle cylinder is fixed while the needle feed cam 4 rotates, the change in the height of the track forces the needle 5 to make regular reciprocating motions of rising and falling in the needle groove. The special metal wire enters the first thread guide magnetic eye 17 of the mast 6 through the wire feeding path and is guided to the knitting area. During the up and down movement of the needle 5, the metal wire is hooked into a net and directly wrapped around the outer surface of the elastic structure support 7. Since the mast 6 rotates with the toothed disc, the path of the metal wire from the exit of the mast 6 to the needle 5 is relatively stationary, reducing friction and tension fluctuations.

[0041] Please see Figure 6 In some embodiments, the stretching mechanism 8 includes a pair of stretching shafts 801 that can rotate in opposite directions. A bushing 802 is fitted on the stretching shaft 801. The bushing 802 is made of polyurethane and has a high coefficient of friction and good elasticity. It clamps the elastic structure support 7 and the mesh sleeve wrapped around it, and provides axial traction force and circumferential clamping force by relying on friction.

[0042] In some embodiments, the drafting mechanism 8 further includes a drafting motor 803, a sprocket pair 804, and a transmission gear pair 805. The drafting motor 803 is mounted on a drafting motor support of the frame 1. The sprocket pair 804 is disposed between the output end of the drafting motor 803 and one of the drafting shafts 801 in a pair, for driving the drafting shaft 801 on that side to rotate. The transmission gear pair 805 is connected to the ends of the pair of drafting shafts 801, for enabling the two drafting shafts 801 to rotate synchronously in opposite directions. A sprocket guard may be provided on the outside of the sprocket pair 804 for safety protection. A tension knob is connected to the clamping mechanism of the drafting shaft 801 for adjusting the clamping force between the shaft pairs.

[0043] Please see Figure 5 In some embodiments, the braiding machine further includes a braiding motor 9, a synchronous pulley pair 10, a drive shaft 11, a bearing housing 12, and a drive bevel gear 13. The braiding motor 9 is mounted on a braiding motor support at the lower part of the frame 1. The synchronous pulley pair 10 is connected to the output end of the braiding motor 9. The drive shaft 11 is rotatably mounted on the frame 1 via the bearing housing 12. One end of the drive shaft 11 is connected to the synchronous pulley pair 10, and the other end is provided with a drive bevel gear 13. The meshing teeth on the braiding toothed disc 3 mesh with the drive bevel gear 13. When the braiding motor 9 rotates, it drives the braiding toothed disc 3 to rotate at a uniform speed through the synchronous pulley pair 10, the drive shaft 11, and the drive bevel gear 13.

[0044] In some embodiments, a hanger rod 14 is also included. One end of the hanger rod 14 is fixedly connected to the upper end of the elastic structural support 7, and the other end is rotatably connected to the gantry 6 through a bearing. During operation, the polyurethane bushing 802 of the stretching mechanism 8 clamps the lower end of the elastic structural support 7. The static friction torque generated by the clamping force overcomes the friction torque transmitted by the upper bearing, keeping the elastic structural support 7 and the hanger rod 14 stationary, forming an anti-rotation structure with the upper suspension and lower clamp.

[0045] In some embodiments, a shuttle rod 15 is also included, which is mounted on the frame 1. The shuttle rod 15 is located on the side of the knitting needle cylinder 2 and is provided with a magnet 16 for assisting the needle 5 in opening the needle and a second thread guide magnet 18 for guiding the special metal wire. The magnet 16 assists the needle 5 in opening the needle cord and ensures that the needle hook can accurately hook the metal wire.

[0046] In some embodiments, a guide wire 19, i.e., a yarn guide, is also provided on the shuttle rod 15. The guide wire 19 is used to control the position of the special metal wire entering the yarn pad of the knitting cylinder 2, ensuring that the metal wire is accurately fed into the needle hook when the needle 5 rises to its highest point.

[0047] In some embodiments, a yarn breakage stop device 22 and / or a filament breakage stop device 21 are provided on the yarn feeding path of the braiding device. The yarn breakage stop device 22 is a mechanical tension sensing switch, and the filament breakage stop device 21 is an electronic tension sensor. Both can be used to trigger a stop and alarm when the metal wire breaks or runs out.

[0048] Please see Figure 2 In some embodiments, the system further includes a wire feeding bracket 23 located outside the frame 1 and a wire feeding rod 24 located inside the frame 1. The wire feeding bracket 23 is equipped with a thread guide wheel 25, and the wire feeding rod 24 is equipped with a thread guide bearing 26. The complete wire feeding path of the special metal wire is as follows: after being drawn from the bobbin, the wire passes through the yarn breakage stop device 22 and the thread guide wheel 25 on the wire feeding bracket 23 outside the box, enters the interior of the frame 1, then passes through the yarn breakage stop device 21 and the thread guide bearing 26 on the wire feeding rod 24 inside the box, then enters the first thread guide magnetic eye 17 of the gantry 6, and finally enters the weaving area through the second thread guide magnetic eye 18 of the shuttle rod 15.

[0049] Please see Figure 7 The working process of this device is as follows: During threading, the special metal wire is drawn out from the spool and passes through the yarn breakage stop device 22 and the thread guide wheel 25 on the yarn feeding bracket 23 outside the box in sequence, enters the machine frame 1, then passes through the yarn breakage stop device 21 and the thread guide bearing 26 on the yarn feeding rod 24 inside the box, then enters the first thread guide magnetic eye 17 of the gantry 6, and finally enters the weaving area through the second thread guide magnetic eye 18 of the shuttle rod 15.

[0050] Before starting, adjust the clamping force of the stretching mechanism 8 according to the product specifications using the tension knob.

[0051] Start the braiding motor 9 and the drafting motor 803. The braiding motor 9 drives the braiding tooth plate 3 to rotate through the synchronous belt pulley pair 10, the transmission shaft 11 and the bevel gear. The needle feed triangle 4 and the mast 6 rotate synchronously with the tooth plate. The needle 5 moves up and down reciprocating under the action of the needle feed triangle 4 track.

[0052] When the mast 6 rotates with the toothed plate, the metal wire passes through the first thread guide magnetic eye 17 of the mast 6 and enters the second thread guide magnetic eye 18 of the shuttle rod 15. Under the control of the wire stop 19, it is accurately inserted into the needle hook of the needle 5. The magnet 16 on the shuttle rod 15 assists the needle 5 to open, so that the metal wire is hooked by the needle hook.

[0053] The reciprocating motion of the needle 5 weaves the metal wire into a mesh, which is directly wrapped around the outer surface of the elastic structure support 7.

[0054] At the same time, the stretching motor 803 drives one side of the stretching shaft 801 to rotate through the sprocket pair 804, and the two stretching shafts 801 rotate synchronously in opposite directions through the transmission gear pair 805. The bushing 802 clamps the elastic structure support 7 and the outer net sleeve, and the finished product is continuously pulled downward by friction.

[0055] During the weaving process, the lower end of the elastic structure support 7 is held still by the stretching mechanism 8, while the upper end hanger 14 is rotatably connected to the gantry 6 through the bearing, without generating circumferential constraints, and the whole structure forms an anti-rotation state of being suspended above and clamped below.

[0056] When the metal wire runs out or breaks accidentally, the yarn breakage stop device 22 or the wire breakage stop device 21 detects the loss of tension, immediately triggers a shutdown and alarm to prevent the generation of waste products.

[0057] Once the weaving is complete, turn off the motor and stop operation.

[0058] This device enables stable weaving of special metal wires, ensuring the circular integrity of the mesh sleeve, and has a reliable self-stop function in case of wire breakage. It is suitable for high-quality production of thermal insulation and sealing elastic structures for aerospace vehicles.

[0059] Example 2: The main difference between this example and Example 1 is that the yarn breakage stop device 22 and the yarn breakage stop device 21 set on the yarn feeding path adopt different configurations: Specifically, in this embodiment, only a yarn breakage stop device 22 is provided on the yarn feeding path. The yarn breakage stop device 22 is a mechanical tension sensing switch used to trigger a stop and alarm when the metal wire breaks or runs out. This embodiment does not include a yarn breakage stop device 21.

[0060] Other structures in this embodiment, such as the drawing mechanism 8 (including the drawing shaft 801, bushing 802, drawing motor 803, sprocket pair 804, and transmission gear pair 805), the braiding transmission mechanism (including the braiding motor 9, synchronous belt pulley pair 10, transmission shaft 11, and transmission bevel gear 13), the hanging rod 14, the shuttle rod 15, and the wire stop 19, are all the same as in Embodiment 1, and their working process and beneficial effects are also the same as in Embodiment 1, and will not be described again here.

[0061] Example 3: The main difference between this example and Example 1 is that the yarn breakage stop device 22 and the yarn breakage stop device 21 set on the yarn feeding path adopt different configurations: Specifically, in this embodiment, only a yarn breakage stop device 21 is provided on the yarn feeding path. The yarn breakage stop device 21 is an electronic tension sensor used to trigger a stop and alarm when the metal wire breaks or runs out. This embodiment does not include a yarn breakage stop device 22.

[0062] Other structures in this embodiment, such as the drawing mechanism 8 (including the drawing shaft 801, bushing 802, drawing motor 803, sprocket pair 804, and transmission gear pair 805), the braiding transmission mechanism (including the braiding motor 9, synchronous belt pulley pair 10, transmission shaft 11, and transmission bevel gear 13), the hanging rod 14, the shuttle rod 15, and the wire stop 19, are all the same as in Embodiment 1, and their working process and beneficial effects are also the same as in Embodiment 1, and will not be described again here.

[0063] Example 4: The main difference between this example and Example 1 is that the bushing on the drawing shaft 801 is made of a different material: Specifically, in this embodiment, a rubber bushing is fitted on the drawing shaft 801. The rubber bushing has a high coefficient of friction and good elasticity, clamping the elastic structure support 7 and the mesh sleeve wrapped around it, and providing axial traction force and circumferential clamping force by relying on friction.

[0064] Other structures in this embodiment, such as the yarn breakage stop device 22 and yarn breakage stop device 21 on the yarn feeding path, the braiding motor 9, the synchronous belt pulley pair 10, the transmission shaft 11, the transmission bevel gear 13, the hanging rod 14, the shuttle rod 15, the wire stop 19, etc., are the same as those in Embodiment 1, and their working process and beneficial effects are also the same as those in Embodiment 1, and will not be described again here.

[0065] Example 5: The main difference between this example and Example 1 is that the bushing on the drawing shaft 801 is made of a different material: Specifically, in this embodiment, a silicone bushing is fitted on the drawing shaft 801. The silicone bushing has a high coefficient of friction and good elasticity, clamping the elastic structure support 7 and the mesh sleeve wrapped around it, and providing axial traction force and circumferential clamping force by relying on friction.

[0066] Other structures in this embodiment, such as the yarn breakage stop device 22 and yarn breakage stop device 21 on the yarn feeding path, the braiding motor 9, the synchronous belt pulley pair 10, the transmission shaft 11, the transmission bevel gear 13, the hanging rod 14, the shuttle rod 15, the wire stop 19, etc., are the same as those in Embodiment 1, and their working process and beneficial effects are also the same as those in Embodiment 1, and will not be described again here.

[0067] Example 6: The main difference between this example and Example 1 is that the external protective structure of the sprocket pair 804 adopts a different configuration: Specifically, in this embodiment, no sprocket guard is provided on the outside of the sprocket pair 804.

[0068] Other structures in this embodiment, such as the yarn breakage stop device 22 and yarn breakage stop device 21 on the yarn feeding path, the drafting mechanism 8 (including drafting shaft 801, bushing 802, drafting motor 803, sprocket pair 804, transmission gear pair 805), braiding motor 9, synchronous belt pulley pair 10, transmission shaft 11, transmission bevel gear 13, hanging rod 14, shuttle rod 15, and wire stop 19, are all the same as in embodiment 1, and their working process and beneficial effects are also the same as in embodiment 1, and will not be described again here.

[0069] Example 7: The main difference between this example and Example 1 is that adjustable feet are added to the bottom of the frame 1: Specifically, in this embodiment, adjustable feet are provided at the four corners of the bottom of the frame 1. Each adjustable foot includes a base, an adjusting screw, and a locking nut. The base is a circular or square metal plate for contact with the ground. The adjusting screw is vertically fixed to the base, and its upper end is screwed into a threaded hole at the bottom of the frame 1. The locking nut is screwed onto the adjusting screw and is located between the bottom of the frame 1 and the base. When it is necessary to adjust the level of the frame 1, the adjusting screw is rotated to change its screwing depth into the frame 1, so that the height of each corner of the frame 1 changes. After adjusting to level, the locking nut is tightened to lock the position. The adjustable feet enable the frame 1 to remain level on uneven ground, ensuring the stability of the weaving process.

[0070] Other structures in this embodiment, such as the yarn breakage stop device 22 and yarn breakage stop device 21 on the yarn feeding path, the drafting mechanism 8, the hanging rod 14, the shuttle rod 15, the guide wire 19, etc., are the same as in embodiment 1, and their working process and beneficial effects are also the same as in embodiment 1, so they will not be described again here.

[0071] Example 8: The main difference between this example and Example 1 is that shock-absorbing pads are added to the bottom of the frame 1: Specifically, in this embodiment, shock-absorbing pads are provided at the four corners of the bottom of the frame 1. The shock-absorbing pads include a metal base and a rubber shock-absorbing block. The metal base is a disc-shaped component with a mounting hole in the center, which is fixedly connected to the bottom of the frame 1 by bolts. The rubber shock-absorbing block is embedded in the lower end face of the metal base and is in direct contact with the ground. The rubber shock-absorbing block has elastic deformation capability, which can effectively absorb and isolate the vibration generated during the operation of the equipment, reduce the transmission of vibration to the ground, and reduce the impact of external vibration on the weaving accuracy.

[0072] Other structures in this embodiment, such as the yarn breakage stop device 22 and yarn breakage stop device 21 on the yarn feeding path, the drafting mechanism 8, the weaving part mechanism, the hanging rod 14, the shuttle rod 15, the guide wire 19, etc., are the same as in embodiment 1, and their working process and beneficial effects are also the same as in embodiment 1, so they will not be described again here.

[0073] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0076] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A knitting machine for a thermal insulation and sealing elastic internal support structure for aerospace vehicles, characterized in that, include: Rack (1); A knitting needle cylinder (2) is disposed on the frame (1); A braiding toothed plate (3) is rotatably mounted on the frame (1) and arranged around the braiding needle cylinder (2); The needle-feeding triangle (4) is set on the braiding toothed plate (3) and rotates synchronously with the braiding toothed plate (3); Multiple needles (5) are mounted on the knitting cylinder (2) in a reciprocating motion and are arranged around the circumference of the knitting cylinder (2). One end of each needle (5) is engaged with the track of the needle feed triangle (4). A gantry (6) is mounted on the braided toothed disc (3) and rotates synchronously with the braided toothed disc (3). The gantry (6) is provided with a first wire guide magnetic eye (17) for guiding special metal wires. An elastic structural support (7) is provided through the knitting needle cylinder (2) and is used to support the inside of the knitted net during the knitting process; A stretching mechanism (8) is provided on the frame (1) for clamping and stretching the woven net and the elastic structural support (7) wrapped inside the net.

2. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 1, characterized in that, The drawing mechanism (8) includes a pair of drawing shafts (801) that can rotate in opposite directions. The pair of drawing shafts (801) are rotatably disposed on the frame (1). Each drawing shaft (801) is fitted with a bushing (802). The two bushings (802) are used to clamp the elastic structural support (7) and the mesh sleeve wrapped around the elastic structural support (7).

3. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 2, characterized in that, The drawing mechanism (8) further includes: A drawing motor (803) is mounted on the frame (1); A sprocket pair (804) is disposed between the output end of the drafting motor (803) and one of the drafting shafts (801); A transmission gear pair (805) is connected to a pair of drawing shafts (801) for enabling the two drawing shafts (801) to rotate synchronously in opposite directions.

4. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 3, characterized in that, Also includes: A braiding motor (9) is mounted on the frame (1); Synchronous pulley pair (10), the synchronous pulley pair (10) is connected to the output end of the braiding motor (9); A drive shaft (11) is rotatably mounted on the frame (1) via a bearing seat (12), and one end of the drive shaft (11) is connected to the synchronous pulley pair (10). A transmission bevel gear (13) is disposed at the end of the transmission shaft (11) away from the synchronous pulley pair (10); The braided toothed disc (3) is provided with meshing teeth that mesh with the transmission bevel gear (13).

5. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 1, characterized in that, It also includes a hanger (14), one end of which is connected to the elastic structure support (7), and the other end is rotatably connected to the gantry (6) through a bearing.

6. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 1, characterized in that, It also includes a shuttle rod (15) mounted on the frame (1), the shuttle rod (15) being provided with a magnet (16) for assisting the needle (5) in opening and a second magnetic eye (18) for guiding the special metal wire.

7. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 1, characterized in that, It also includes a guide wire (19) set on the shuttle rod (15), the guide wire (19) being used to control the special metal wire entering the padding position of the knitting cylinder (2).

8. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 1, characterized in that, The braiding device is equipped with a yarn breakage stop device (22) and / or a wire breakage stop device (21) on the yarn feeding path to trigger a stop when the metal wire breaks or is exhausted.

9. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 1, characterized in that, It also includes a wire feeding bracket (23) disposed on the outside of the frame (1) and a wire feeding rod (24) disposed inside the frame (1); The wire feeding bracket (23) is provided with a thread guide wheel (25), and the wire feeding rod (24) is provided with a thread guide bearing (26). The special metal wire passes through the yarn breakage stop device (22), the thread guide wheel (25), the yarn breakage stop device (21), and the thread guide bearing (26) in sequence before entering the gantry (6).

10. The knitting machine for the thermal insulation and sealing elastic internal support structure of aerospace vehicles according to claim 1, characterized in that, It also includes an electrical control box (27), which is mounted on the frame (1) via a threaded connector and is electrically connected to the stretching mechanism (8).

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