Rope releasing device and parachute cord processing equipment

Abstract

The utility model discloses a rope releasing device and parachute cord processing equipment, the rope releasing device is used for winding and releasing a parachute cord, and the rope releasing device comprises a support; the friction wheel is rotationally arranged on the support, and the parachute cord is wound around the friction wheel; the brake is fixedly arranged on the support and used for changing the rotating resistance of the friction wheel. According to the rope releasing device, the rotation resistance of the friction wheel is changed by adjusting the brake so as to control the release resistance of the parachute rope, so that the parachute rope is released according to requirements, an overlong parachute rope section does not need to be cut in advance, the problems of low efficiency and large waste in the traditional technology are effectively solved, the processing efficiency is improved, and the waste of raw materials is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of paracord processing technology, specifically relating to a paracord unloading device and paracord processing equipment. Background Technology

[0002] Whether it's an aircraft parachute, a drone parachute, or a human parachute, a major component they all share is the parachute lines. The quality of the parachute line processing, specifically the accuracy of the line length, directly affects the shape of the canopy and, consequently, its performance after deployment. Therefore, it can be said that the parachute lines are one of the most critical factors determining parachute performance. According to relevant standards, factories should adopt a production method where a certain tension is applied to both ends of the parachute lines, and the length of the lines is determined under this tension. During the design phase, parachute line length data with specified tension is provided; during production, the parachute lines are marked and cut according to the designed tension; during finished product inspection, the parachute line length is also measured under the designed tension to determine product quality.

[0003] Currently, paracord processing is typically accomplished using a relatively simple marking table. This table mainly consists of a flat, long, straight surface approximately 8 x 1 meter in size and a metal pin, about 30 centimeters high, fixed to one end of the surface and arranged vertically. The working principle involves first cutting a section of paracord significantly longer than the design requirements. One end is folded back and secured with a knot to form a rope loop. The knotted end is then inserted into the metal pin and secured. The other end of the paracord is straightened and subjected to appropriate tension. After measuring the required length, a marking is made, and finally, the paracord is cut according to the markings. This method simplifies the structure and reduces the complexity of paracord production to some extent.

[0004] However, traditional marking tables can only process one paracord at a time, cutting and marking them one by one, which is difficult to meet the demand for efficient processing in large-scale production. There is a significant lag in processing progress and output, which is not compatible with the pace of modern mass production. Utility Model Content

[0005] The main purpose of this utility model is to overcome the shortcomings and deficiencies of the prior art and provide a rope-releasing device and paracord processing equipment, aiming to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a rope-releasing device for winding and releasing paracord, comprising: a bracket; a friction wheel rotatably mounted on the bracket, the paracord being wound around the friction wheel; and a brake fixedly mounted on the bracket for changing the rotational resistance of the friction wheel.

[0008] Furthermore, the friction wheel is made of rubber.

[0009] Furthermore, the friction wheel is provided with a groove in the circumference, and the groove is arranged in a spiral shape around the central axis of the friction wheel, and the paracord is wound along the groove.

[0010] Furthermore, the wheel groove has at least three turns around the central axis of the friction wheel.

[0011] Furthermore, the diameter of the friction wheel is 120 mm;

[0012] And / or, the groove is a semi-circular spiral groove with a diameter of 8 mm;

[0013] And / or, the pitch of the wheel groove about the central axis of the friction wheel is 18 mm.

[0014] Furthermore, it also includes a wheel hub and a wheel hub cover plate, with the friction wheel disposed between the wheel hub and the wheel hub cover plate, and the wheel hub and the wheel hub cover plate being rotatably connected to the bracket respectively.

[0015] Furthermore, the wheel hub has a plurality of fixing posts arranged axially on the side facing the wheel hub cover plate, the wheel hub cover plate has a plurality of first fixing holes corresponding to the plurality of fixing posts axially, and the friction wheel has a plurality of second fixing holes corresponding to the plurality of fixing posts axially; the plurality of fixing posts pass through the plurality of first fixing holes and the plurality of second fixing holes respectively.

[0016] A first rotating shaft is coaxially arranged on the side of the wheel hub away from the wheel hub cover plate, and a second rotating shaft is coaxially arranged on the side of the wheel hub cover plate away from the wheel hub. The first rotating shaft and the second rotating shaft are respectively rotatably connected to the bracket.

[0017] Furthermore, the first rotating shaft and / or the second rotating shaft are provided with a brake disc, and the brake includes a driver and a brake caliper, the driver being used to drive the brake caliper to clamp or release the brake disc.

[0018] Furthermore, the end of the fixing post away from the hub is provided with a threaded hole in the axial direction. The threaded hole is threadedly engaged with the fixing screw, and the diameter of the nut of the fixing screw is larger than the diameter of the first fixing hole.

[0019] Alternatively, the end of the fixing post away from the hub may be provided with an external thread, which is threaded to a fixing nut, and the outer diameter of the fixing nut is larger than the diameter of the first fixing hole.

[0020] Secondly, this utility model provides a paracord processing device, including a reel and the rope-releasing device described in the first aspect. The reel is loaded with a paracord coil, and the paracord is pulled out from the paracord coil and wound around the rope-releasing device.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects: The rope release device of this utility model controls the release resistance of the paracord by adjusting the brake to change the rotational resistance of the friction wheel, thereby releasing the paracord as needed without pre-cutting excessively long paracord segments. This effectively solves the problems of low efficiency and large waste in traditional technology, improves processing efficiency, and reduces raw material waste. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0023] Figure 1 This is a front view structural schematic diagram of the rope-releasing device according to an embodiment of this utility model;

[0024] Figure 2 This is a first three-dimensional structural schematic diagram of the rope-releasing device according to an embodiment of the present utility model;

[0025] Figure 3 This is a second three-dimensional structural schematic diagram of the rope-releasing device according to an embodiment of this utility model;

[0026] Figure 4 This is a first exploded view of the rope-releasing device according to an embodiment of the present invention;

[0027] Figure 5 This is a second exploded view of the rope-releasing device according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Bracket; 20. Friction wheel; 21. Wheel groove; 22. Second fixing hole; 30. Brake; 31. Brake disc; 32. Brake caliper; 40. Wheel hub; 41. Fixing post; 42. First rotating shaft; 50. Wheel hub cover plate; 51. First fixing hole; 52. Second rotating shaft; 53. Receiving groove. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a 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 utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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," and "under" the second feature includes the first feature 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.

[0036] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring 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.

[0037] Please see Figures 1 to 5 This utility model provides a rope-releasing device for winding and releasing paracord, comprising: a bracket 10; a friction wheel 20 rotatably mounted on the bracket 10, with the paracord wound around the friction wheel 20; and a brake 30 fixedly mounted on the bracket 10 for changing the rotational resistance of the friction wheel 20. It should be explained that changing the rotational resistance of the friction wheel 20 aims to adjust the tension of the paracord pulled from the rope-releasing device to meet processing requirements.

[0038] Specifically, initially, the friction wheel 20 is stationary, and the paracord is ready to be released. When the paracord needs to be released, the operator adjusts the rotational resistance of the friction wheel 20 to a suitable level using the brake 30. Subsequently, the friction wheel 20 begins to rotate under the combined action of the paracord tension and its own rotational resistance, and the paracord is gradually released according to the set resistance conditions. During the release process, the operator can adjust the rotational resistance at any time using the brake 30 according to actual needs to precisely control the release speed and tension of the paracord. When the paracord has been released to the required length, the brake 30 is used again to bring the friction wheel 20 to a standstill, completing the release operation. The release device of this embodiment can release continuously as needed, reducing the tedious steps of repeated pre-cutting, marking, and trimming in traditional processing, greatly improving processing efficiency and meeting the demand for high-efficiency processing in large-scale production. Meanwhile, by precisely controlling the rotational resistance of the friction wheel 20, the release length and tension of the paracord can be precisely controlled, avoiding the redundant parts caused by pre-cutting excessively long paracord segments, effectively reducing raw material waste, improving raw material utilization, and thus reducing production costs and achieving resource conservation.

[0039] Furthermore, the friction wheel 20 is made of rubber.

[0040] It should be explained that the friction wheel 20 should have a certain degree of elasticity to increase the contact area with the paracord while preventing damage to the paracord. Therefore, rubber is considered as the material for direct contact with the paracord. Preferably, in this embodiment, neoprene rubber with excellent resilience and good adhesion to fabric is selected as the material for the friction wheel 20 to contact the paracord.

[0041] Furthermore, the friction wheel 20 is provided with a groove 21 around its circumference. The groove 21 is spirally arranged around the central axis of the friction wheel 20, and the paracord is wound around the groove 21.

[0042] Understandably, in the paracord processing, to ensure stable and orderly winding and release of the paracord while maintaining precise tension control, the friction wheel 20 in this embodiment is equipped with a helical groove 21. This aims to further reduce processing errors caused by paracord slippage or uneven tension. Specifically, the paracord is wound around the friction wheel 20 along the path of the helical groove 21. Initially, the friction wheel 20 is stationary, and the paracord is taut and ready to be released. When the paracord needs to be released, the brake 30 is operated to reduce the rotational resistance of the friction wheel 20, causing the friction wheel 20 to start rotating, and the paracord is released orderly along the helical groove 21. Due to the rubber material of the friction wheel 20 and the design of the helical groove 21, sufficient friction is maintained between the paracord and the friction wheel 20, ensuring no slippage of the paracord during release, thereby guaranteeing stable paracord tension.

[0043] It should be explained that in order to ensure that the paracord does not slip on the friction wheel 20 and thus ensures the stability of its tension, the number of turns required to ensure that there is no slippage between the paracord and the friction wheel 20, i.e., the number of turns of the wheel groove 21, and the diameter of the friction wheel 20, should be calculated. The following is an analysis of this.

[0044] The analysis of the frictional force of a rope wound around a cylinder shall be performed according to the following formula:

[0045]

[0046] In the formula:

[0047] f—the frictional force between the rope and the cylinder;

[0048] F0—is the tension in the opposite direction to the force applied to the rope;

[0049] l — the length of the rope wrapped around the cylinder;

[0050] μ — the coefficient of friction between the rope and the cylinder;

[0051] R — the radius of the cylinder.

[0052] Introducing the number of wrapping turns m, we have:

[0053]

[0054] From the above formula, it can be seen that when the rope is wound around a cylinder more than once, the maximum frictional force f between the rope and the cylinder is directly related only to the number of turns m, and not directly related to the radius of the cylinder or the length of the rope around the cylinder. That is, given the required frictional force, the required number of turns can be calculated. The radius of the cylinder and the length of the rope around the cylinder are interrelated; selecting one determines the other parameter. After determining the number of turns m and the length l of the rope around the cylinder, the radius R of the rope cylinder is determined by the following relationship: It has been confirmed.

[0055] Therefore, firstly according to f=F0(e m2πμ -1) Calculate the required number of winding turns, m. According to the design specifications, the paracord requires a maximum tension of 200N. Taking 1.5 as a safety factor, we get F = 300N. That is, the rope release device should be able to provide 300N of tension. Since the required tension is the frictional force between the rope and the cylinder, f = F = 300N. 0的 The tension is mainly generated by the mechanical friction during rope pulling and the rotational inertia of the spool, so we take F0 = 1N. We also take the coefficient of friction between the paracord and the rubber to be 0.4, i.e., μ = 0.4. Substituting these parameters into f = F0(e m2πμ In step -1), we calculate that m≈2.27, and take m=3. At this point, the frictional force between the rope and the cylinder can reach about 1874.3N, i.e., F=f=1874.3N, which greatly exceeds the design requirements.

[0056] Furthermore, the groove 21 has at least three turns around the central axis of the friction wheel 20, and the paracord has at least three turns around the friction wheel 20, generating approximately 1874.1 N of frictional force between the paracord and the friction wheel 20, which is sufficient to meet the tension requirements of the paracord. Preferably, to ensure that the paracord can smoothly wind out from the other end of the groove 21 after entering from one end, the groove needs to not affect the entering and winding of the paracord. In this embodiment, the number of turns of the spiral groove 21 is set to 3.5 turns.

[0057] Furthermore, the diameter of the friction wheel 20 is 120mm. It should be explained that the diameter of the friction wheel 20 in this embodiment is selected according to the following formula:

[0058]

[0059] When the diameter is too small, the rope becomes excessively coiled, which can negatively impact its weaving structure. Irreversible deformation is more likely to occur, especially after tension is applied. Furthermore, a longer rope length around the cylinder facilitates earlier stress release in the paracord. Considering all these factors, l ≥ 1000 mm is determined. Based on l = 1000 mm and m = 3, according to... The calculated value of R is 53mm. Considering that the friction wheel 20 needs to have a spiral groove to better accommodate and guide the paracord, and that the rubber material has a certain degree of elasticity, R is set to 60mm. Therefore, in this embodiment, the radius of the friction wheel 20 is selected to be 60mm, and the diameter is 120mm.

[0060] Furthermore, the groove 21 is a semi-circular spiral groove with a diameter of 8mm. It should be explained that the groove width of the groove 21 should be determined according to the diameter of the paracord to ensure that the paracord is fully accommodated. Based on the processing paracord diameter range of 2-5mm, the diameter of the groove 21 is selected as 8mm in this embodiment, which can stably accommodate most of the paracord.

[0061] Furthermore, the pitch of the groove 21 around the central axis of the friction wheel 20 is 18mm.

[0062] Furthermore, it also includes a hub 40 and a hub cover plate 50, with a friction wheel 20 disposed between the hub 40 and the hub cover plate 50, and the hub 40 and the hub cover plate 50 being rotatably connected to the bracket 10 respectively.

[0063] Furthermore, a plurality of fixing posts 41 are axially arranged on the side of the hub 40 facing the hub cover plate 50, and a plurality of first fixing holes 51 corresponding to the plurality of fixing posts 41 are arranged on the side of the hub 40 axially. A plurality of second fixing holes 22 corresponding to the plurality of fixing posts 41 are arranged on the side of the friction wheel 20 axially. The plurality of fixing posts 41 pass through the plurality of first fixing holes 51 and the plurality of second fixing holes 22 respectively. A first rotating shaft 42 is coaxially arranged on the side of the hub 40 away from the hub cover plate 50, and a second rotating shaft 52 is coaxially arranged on the side of the hub cover plate 50 away from the hub 40. The first rotating shaft 42 and the second rotating shaft 52 are rotatably connected to the bracket 10 respectively.

[0064] Optionally, the hub 40, hub cover plate 50, and friction wheel 20 are coaxially arranged. Optionally, four fixing posts 41 are provided, and the four fixing posts 41 are evenly arranged around the central axis of the hub 40.

[0065] Furthermore, the first rotating shaft 42 and / or the second rotating shaft 52 are provided with a brake disc 31, and the brake 30 includes a driver and a brake caliper 32. The driver is used to drive the brake caliper 32 to clamp or release the brake disc 31. It should be noted that the brake 30 in this embodiment is a disc brake 30. The following is an analysis of the parameter requirements for the brake 30 in this embodiment.

[0066] In this embodiment, the diameter of the friction wheel 20 is determined to be 120mm, and the design requires the friction wheel 20 to provide a maximum tension of 300N for the paracord. According to the torque calculation formula:

[0067] τ=r×F

[0068] In the formula:

[0069] τ — torque;

[0070] r is the distance from the point of application of the force to the center of rotation, which is 60mm in this case;

[0071] F represents the force applied, which is 300 N.

[0072] The maximum torque generated by the friction wheel 20 is calculated to be 18 N·m. Therefore, the braking torque provided by the brake 30 should be at least greater than or equal to 18 N·m. However, in addition to the maximum torque requirement, since different specifications of paracord require different tensions, the braking torque of the brake 30 should also be freely adjustable between 0-18 N·m to meet the requirements.

[0073] Furthermore, the end of the fixing post 41 away from the hub 40 is axially provided with a threaded hole, which is threadedly engaged with a fixing screw, and the diameter of the fixing screw nut is larger than the diameter of the first fixing hole 51; or, the end of the fixing post 41 away from the hub 40 is circumferentially provided with an external thread, which is threadedly engaged with a fixing nut, and the outer diameter of the fixing nut is larger than the diameter of the first fixing hole 51. In this embodiment, through the engagement of the fixing screw and the threaded hole, the side of the hub cover plate 50 away from the hub 40 is provided with a receiving groove 53 for accommodating the nut of the fixing screw.

[0074] This utility model provides a paracord processing device, including a reel and a rope release device as described above. The reel is loaded with a paracord coil, and the paracord is pulled out from the paracord coil and wound around the rope release device.

[0075] In this embodiment, the reel is used to load the paracord coil, while the release device is responsible for controlling the release of the paracord. Specifically, after the paracord is pulled from the coil on the reel, it is wound onto the friction wheel 20 of the release device. By adjusting the brake 30 of the release device, the rotational resistance of the friction wheel 20 can be changed, thereby controlling the release speed and tension of the paracord. This embodiment achieves continuous operation from loading the paracord coil to releasing the paracord, reducing the cumbersome steps in traditional processing, improving overall production efficiency, and ensuring that the release device can precisely control the tension of the released paracord, thus improving processing quality.

[0076] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be regarded as equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A rope release device for winding and releasing an umbrella cord, characterized in that, include: support; A friction wheel is rotatably mounted on the bracket, and the paracord is wound around the friction wheel; A brake, fixedly mounted on the bracket, is used to change the rotational resistance of the friction wheel.

2. A rope deployment device according to claim 1, wherein, The friction wheel is made of rubber.

3. The line paying out device according to claim 1, characterized in that The friction wheel is provided with a groove in the circumference, and the groove is arranged in a spiral shape around the central axis of the friction wheel. The paracord is wound around the groove.

4. A rope deployment device according to claim 3, wherein, The groove is arranged in at least 3 turns around the central axis of the friction wheel.

5. The line paying out device according to claim 3, characterized in that The diameter of the friction wheel is 120mm; And / or, the groove is a semi-circular spiral groove with a diameter of 8 mm; And / or, the pitch of the wheel groove about the central axis of the friction wheel is 18 mm.

6. The line paying out device according to claim 1, characterized in that It also includes a wheel hub and a wheel hub cover plate, with the friction wheel disposed between the wheel hub and the wheel hub cover plate, and the wheel hub and the wheel hub cover plate being rotatably connected to the bracket respectively.

7. A rope deployment device according to claim 6, wherein, The wheel hub has a plurality of fixing posts arranged axially on the side facing the wheel hub cover plate, and the wheel hub cover plate has a plurality of first fixing holes corresponding to the plurality of fixing posts axially. The friction wheel has a plurality of second fixing holes corresponding to the plurality of fixing posts axially. The plurality of fixing posts pass through the plurality of first fixing holes and the plurality of second fixing holes respectively. A first rotating shaft is coaxially arranged on the side of the wheel hub away from the wheel hub cover plate, and a second rotating shaft is coaxially arranged on the side of the wheel hub cover plate away from the wheel hub. The first rotating shaft and the second rotating shaft are respectively rotatably connected to the bracket.

8. A rope deployment device according to claim 7, wherein, The first rotating shaft and / or the second rotating shaft are provided with a brake disc, and the brake includes a driver and a brake caliper, the driver being used to drive the brake caliper to clamp or release the brake disc.

9. The line paying out device according to claim 7, characterized in that The fixed post has a threaded hole axially provided at one end away from the hub. The threaded hole is threadedly engaged with the fixing screw. The diameter of the nut of the fixing screw is larger than the diameter of the first fixing hole. Alternatively, the end of the fixing post away from the hub is provided with an external thread, which is threaded to the fixing nut, and the outer diameter of the fixing nut is larger than the diameter of the first fixing hole.

10. An umbrella cord processing apparatus characterized by comprising: The device includes a reel and a rope-releasing device as described in any one of claims 1-9, wherein the reel is loaded with a paracord coil, and the paracord is pulled out from the paracord coil and wound around the rope-releasing device.

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