Assembly tool and assembly method of tension-torsion structure

Abstract

The invention relates to an assembly tool and method for a tension-torsion structure in the technical field of aeronautical manufacturing, the assembly tool comprises a supporting rod, supports, a plurality of limiting strips and two fixing assemblies, the supports are used for placing the two ends of the supporting rod, and the two ends of the tension-torsion structure are arranged on the supporting rod at intervals; the two ends of each limiting strip are installed in the installation grooves of the two ends respectively. The two fixing assemblies are used for correspondingly fixing one end to the set position of the supporting rod. According to the assembly tool, axial collimation and positioning of the mounting grooves between the ends of the two ends of the tension-torsion structure can be achieved, the situation that the tension-torsion strips generate torsion moment in the initial mounting state, and the installation and use performance of the tension-torsion structure is affected is avoided, meanwhile, it can be guaranteed that the tension-torsion strips are gradually bonded when being bonded with the ends, the good bonding effect is achieved, and the production efficiency is improved. The method has important application value for improving the assembly consistency of the tension-torsion structure and ensuring the stable performance of the tension-torsion structure.

Description

Technical Field

[0001] This application relates to the field of aerospace manufacturing technology, and in particular to an assembly tooling and assembly method for a tension-torsion structure. Background Technology

[0002] The tension-torsion structure is a critical component of the helicopter tail rotor drive. It consists of two metal ends and composite tension-torsion strips bonded to grooves in the two metal ends and arranged circumferentially. The two metal ends connect to the rotor hub and blades. During service, the composite tension-torsion strips must withstand not only axial centrifugal loads but also structural torsional moments. Misalignment in the assembly of these strips can cause internal stress, leading to one or more strips becoming weak points in the structure, ultimately resulting in overall instability and failure of the tension-torsion structure, and causing flight safety accidents. Therefore, the consistency of the bonding, assembly, and positioning of the composite tension-torsion strips is crucial.

[0003] Therefore, this invention is proposed. Summary of the Invention

[0004] In view of the problems existing in the background technology, this application provides an assembly fixture and assembly method for a tension-torsion structure, which can not only realize the axial alignment and positioning of the tension-torsion strip mounting groove between the two ends of the tension-torsion structure, avoiding the generation of torsional torque in the tension-torsion strip in the initial installation state, which affects the performance of the tension-torsion structure in the machine, but also ensure that each tension-torsion strip is bonded to the end in sequence, with good bonding effect.

[0005] According to one aspect of the present invention, an assembly fixture for a tension-torsion structure is provided, comprising: a support rod; a support for placing both ends of the support rod, wherein two ends of the tension-torsion structure are spaced apart on the support rod, and the sides of the two ends with mounting grooves are arranged facing each other; a plurality of limiting strips, wherein the two ends of each limiting strip are respectively inserted into one mounting groove of each of the two ends, and the two mounting grooves assembled with the same limiting strip are aligned with each other; and two fixing components, each of the two fixing components being used to fix one end to a corresponding set position on the support rod.

[0006] In some embodiments of the present invention, the fixing component includes: a mating block, which is sleeved on the support rod and attached to the side of the corresponding end away from the other end; and a fastener, which is disposed on the side of the mating block away from the corresponding end and connected to the support rod, so that the mating block supports and limits the corresponding end.

[0007] In some embodiments of the present invention, the fixing component further includes a locking member, which connects the mating block and the corresponding end, for limiting the rotation of the corresponding end relative to the mating block on the support rod.

[0008] In some embodiments of the present invention, the inner hole of the mating block is a regular polygonal hole, and the support rod is located at the position of the mating block and is formed into a regular polygonal column that matches the regular polygonal hole.

[0009] In some embodiments of the present invention, the locking element is a snap-fit.

[0010] In some embodiments of the present invention, the mating block has a protrusion in the middle facing the side corresponding to the fastener.

[0011] In some embodiments of the present invention, the fastener is a nut.

[0012] In some embodiments of the present invention, the number of the limiting strips is three or more.

[0013] In some embodiments of the present invention, the two ends of the limiting strip are respectively adapted to the corresponding mounting groove.

[0014] According to another aspect of the present invention, a method for assembling a tension-torsion structure using an assembly fixture as described above is provided, comprising the following steps: placing two ends of the tension-torsion structure at intervals on a support rod, with the sides of the two ends having mounting grooves facing each other; installing a plurality of limiting strips one by one into the corresponding mounting grooves on the two ends, and using two fixing components to fix the corresponding ends to the support rod respectively, so that the two ends are accurately positioned by the limiting strips and the fixing components; placing the support rod with the ends and limiting strips installed horizontally on a support; applying adhesive to the other mounting grooves where the ends are not fitted with limiting strips, and sequentially bonding the tension-torsion strips; after the adhesive has cured the installed tension-torsion strips, removing each limiting strip and continuing to use adhesive to complete the installation of the tension-torsion strips in the remaining mounting grooves; after all the tension-torsion strips have been bonded and cured, removing the two ends and tension-torsion strips from the support and support rod, thus completing the assembly of the tension-torsion structure.

[0015] Compared with the prior art, the present invention achieves the following technical effects: This application provides an assembly fixture for a tension-torsion structure. The assembly fixture ensures the consistency of distance and axial alignment between the two ends of the tension-torsion structure through limiting strips and support rods. The rotatability of the support rods on the support is beneficial to improving the adhesion of each composite material tension-torsion strip in the end mounting groove, which is of great significance to improving the assembly stability and assembly efficiency of the tension-torsion structure. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the assembly tooling for the tension-torsion structure of the present invention; Figure 2 This is an exploded view of the assembly tooling for the tension-torsion structure of the present invention.

[0017] The labels in the attached diagram represent the following: 1. Support; 2. Support rod; 3. Fastener; 4. Locking element; 5. Mating block; 6. Limiting strip; 7. End. Detailed Implementation

[0018] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0019] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0020] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0021] This application discloses an assembly fixture for a tension-torsion structure. For example... Figure 1 and Figure 2As shown, the assembly fixture for the tension-torsion structure includes a support rod 2, a support 1, several limiting strips 6, and two fixing components. The support 1 is used to place both ends of the support rod 2. The two ends 7 of the tension-torsion structure are spaced apart on the support rod 2, and the sides of the two ends 7 with mounting grooves face each other. The two ends of each of the several limiting strips 6 are respectively inserted into one mounting groove of each of the two ends 7, and the two mounting grooves assembled with the same limiting strip 6 are aligned with each other. The two fixing components are used to fix one end 7 to a set position on the support rod 2.

[0022] In this invention, the distance consistency and axial alignment between the two ends 7 of the tension-torsion structure are ensured by the limiting strip 6 and the support rod 2. After the two ends 7 are fixed relative to the support rod 2 and placed on the support 1 using two fixing components, the flexibility of the support rod 2 on the support 1, such as its rotatability, can be used to install the tension strips in the other mounting slots where the limiting strip 6 is not installed, using adhesive. After the adhesive has cured the installed tension strips, the limiting strips 6 are removed and the remaining tension strips in the mounting slots are installed using adhesive. This not only achieves axial alignment and positioning of the tension strip mounting slots between the two ends 7 of the tension-torsion structure, avoiding the generation of torsional torque in the tension strips in the initial installation state, which would affect the performance of the tension-torsion structure in the machine, but also ensures that each tension strip is bonded to the end 7 in sequence, with good bonding effect, and improves the assembly efficiency of the tension strips and the end 7.

[0023] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the fixing component includes a mating block 5 and a fastener 3; wherein, the mating block 5 is sleeved on the support rod 2 and attached to the side of the corresponding end 7 away from the other end 7; the fastener 3 is provided on the side of the mating block 5 away from the corresponding end 7, and the fastener 3 is connected to the support rod 2, so that the mating block 5 supports and limits the corresponding end 7.

[0024] In this embodiment, on the support rod 2, two mating blocks 5 clamp the two ends 7 on which the limit strips 6 are installed. Then, the fasteners 3 on opposite sides of the mating blocks 5 stabilize the two mating blocks 5 in a state of clamping the two ends 7, thereby achieving stable positioning of the two ends 7 and the limit strips 6 on them. This achieves axial alignment and positioning of the tension strip mounting groove between the two ends 7 of the tension-torsion structure, and avoids the tension strip generating torsional torque in the initial installation state.

[0025] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the fixing assembly also includes a locking member 4, which connects the mating block 5 and the corresponding end 7, and is used to restrict the rotation of the corresponding end 7 relative to the mating block 5 on the support rod 2.

[0026] In this embodiment, the corresponding end 7 is locked relative to the mating block 5 by the locking member 4. Based on the support and fixation of the mating block 5 by the fastener 3, the rotation of the corresponding end 7 relative to the mating block 5 on the support rod 2 can be prevented. After the two ends 7 are positioned on the support rod 2, slight offset between the two ends 7 is prevented during the subsequent installation of the pull-torsion strip, thus ensuring the installation accuracy of the pull-torsion strip on the end 7.

[0027] In some embodiments of the present invention, such as Figure 2 As shown, the inner hole of the mating block 5 is a regular polygonal hole, and the support rod 2 is located at the position of the mating block 5 and forms a regular polygonal column that matches the regular polygonal hole.

[0028] In this embodiment, by designing the inner hole of the mating block 5 as a regular polygonal hole, and designing a regular polygonal column that matches the regular polygonal hole at the corresponding part of the support rod 2, after locking the corresponding mating block 5 and the end 7 with the locking member 4, the end 7 and the mating block 5 can be prevented from rotating relative to the support rod 2, thereby ensuring the accurate positioning of the two end 7 and the stability of their relative positions when installing the torsion bar.

[0029] In some embodiments of the present invention, the regular polygonal hole and the regular polygonal prism include, but are not limited to, squares, regular pentagons, regular hexagons, etc., with squares being preferred.

[0030] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the locking element 4 can be a snap-fit, such as a metal clamp or similar structure.

[0031] In this embodiment, the outer contour dimension of the mating block 5 is consistent with that of the corresponding end 7, that is, the outer diameter of the mating block 5 and the end 7 are equal. The buckle achieves a detachable and stable connection between the mating block 5 and the end 7 by wrapping around the mating block 5 and the end 7 and adjusting the tightness.

[0032] Furthermore, the buckle has a groove that can simultaneously accommodate the edge of the mating block 5 and the end 7, that is, the width of the groove along the direction of the support rod 2 is equal to the sum of the thicknesses of the edges of the mating block 5 and the end 7, thereby simultaneously achieving radial and axial limiting and locking of the mating block 5 and the end 7 through the buckle.

[0033] Furthermore, the metal clamp adopts a two-part structure, which can clamp the mating block 5 and the end 7 together and lock them with bolts.

[0034] Preferably, the mating block 5 and the end 7 fit together tightly without gaps.

[0035] In other embodiments of the present invention, the mating block 5 and the end 7 may be fixed by temporary bonding or welding; or the locking member 4 may be a G-type clip, which is fastened by circumferentially spaced multiple clips on the mating block 5 and the end 7. Those skilled in the art can make reasonable designs as needed.

[0036] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the mating block 5 has a protrusion on the side facing the corresponding fastener 3 in the middle.

[0037] In this embodiment, by designing the mating block 5 to protrude from the side opposite to the end 7, that is, the annular mating block 5 is designed to be thick in the middle and thin around the edges except for the inner hole area, it is convenient to operate the fastener 3 and connect the fastener 3 to the support rod 2, thereby fixing the mating block 5. In particular, when using a metal clamp to lock the mating block 5 and the end 7, the protrusion can reduce the obstruction of the mating block 5 by the metal clamp, making it convenient for workers to operate the fastener 3 with tools.

[0038] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the fastener 3 can be a nut, that is, the support rod 2 is provided with an external thread that is compatible with the nut, so that the nut can be screwed onto the support rod 2 from the corresponding end of the support rod 2 until the nut is in close contact with the mating block 5.

[0039] In some embodiments of the present invention, such as Figure 2 As shown, the number of limit strips 6 is three or more, ensuring that there are a certain number of remaining mounting slots for the pull-torsion strip to be installed. For example, the number of limit strips 6 can be 3, 4, 5 or 6, etc.

[0040] For example, in this embodiment, the two ends 7 are provided with an equal number of mounting slots, and the mounting slots are connected to the outer peripheral surface of the end 7 and one of the end surfaces. The tension-torsion structure consists of two ends 7 with mounting slots and several composite material tension-torsion strips arranged circumferentially along the mounting slots of the ends 7. The two ends of the limiting strip 6 can be simultaneously inserted into the two mounting slots radially from the outside to the inside of the ends 7.

[0041] When there are 3 limit strips 6, one limit strip 6 can be installed at the 12 o'clock, 4 o'clock and 8 o'clock positions of the end 7 respectively. When there are 4 limit strips 6, one limit strip 6 can be installed at the 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock positions of the end 7 respectively.

[0042] Preferably, the two ends of the limiting strip 6 are respectively adapted to the corresponding mounting groove.

[0043] In some embodiments of the present invention, the diameter of the support rod 2 located at the two ends 7 does not exceed the inner diameter of the ends 7. Preferably, the diameter of the support rod 2 is 0.1 mm to 0.2 mm smaller than the inner diameter of the ends 7.

[0044] For example, when the diameter of the support rod 2 is close to the inner diameter of the end 7, and the support rod 2 can provide radial support to the end 7, the regular polygonal column of the support rod 2 located at the position of the mating block 5 is coaxially set with the support rod 2, and the outer circle diameter of the regular polygonal column is not greater than the diameter of the support rod 2. At the same time, the diameter of the part of the support rod 2 outside the regular polygonal column is not greater than the inner circle diameter of the regular polygonal column. This allows the end 7 to be fitted onto the middle length of the support rod 2 from the end of the support rod 2, and the mating block 5 to be fitted onto the position of the regular polygonal column from the end of the support rod 2. Finally, the nut is tightened on the threaded section of the end 7 of the support rod 2.

[0045] When the diameter of the support rod 2 is smaller than the inner diameter of the end 7, making it impossible for the support rod 2 to provide radial support to the end 7, the metal clamp can be used to interlock the mating block 5 with respect to the end 7 to achieve radial positioning of the end 7. At this time, the regular polygonal column of the support rod 2 located at the position of the mating block 5 is coaxially set with the support rod 2, and the outer diameter of the regular polygonal column is not greater than the inner diameter of the end 7. At the same time, the diameter of the part of the support rod 2 outside the regular polygonal column is not greater than the inner diameter of the regular polygonal column. This allows the end 7 to be fitted onto the middle length of the support rod 2 from the end of the support rod 2, and the mating block 5 to be fitted onto the position of the regular polygonal column from the end of the support rod 2. Finally, the nut is tightened on the threaded section of the end 7 of the support rod 2.

[0046] In some embodiments of the present invention, such as Figure 2 As shown, the support rod 2 is horizontally set on the support 1. The support 1 and the support rod 2 have a groove at the joint. After the support 1 supports both ends of the support rod 2, the middle of the support rod 2 is suspended. The support rod 2 can rotate freely on the support 1 to realize the sequential bonding of the tension strips.

[0047] In some embodiments of the present invention, the support 1, support rod 2, mating block 5, limiting strip 6, buckle and nut and other structures can all be made of metal materials, such as steel, aluminum and other hard metals.

[0048] This embodiment also proposes a method for assembling a tension-torsion structure using the above-described assembly tooling, the method comprising the following steps: The two ends 7 of the tension-torsion structure are placed on the support rod 2 at intervals, with the sides of the two ends 7 with the mounting grooves facing each other.

[0049] Several limiting strips 6 are installed one by one in the corresponding mounting slots on the two ends 7. Two fixing components are used to fix the corresponding ends 7 to the support rod 2 respectively, so that the two ends 7 are accurately positioned by the limiting strips 6 and the fixing components.

[0050] The support rod 2, which is equipped with end 7 and limit strip 6, is placed horizontally on the support 1.

[0051] Apply adhesive to the other mounting slots at end 7 where the limit strip 6 is not installed, and then attach the pull-twist strips in sequence.

[0052] After the adhesive has cured the installed torsion strips, remove each limiting strip 6 and continue to use adhesive to complete the installation of the remaining torsion strips in the mounting slots.

[0053] After all the tension and torsion strips have been glued and cured, remove the two ends 7 and the tension and torsion strips from the support 1 and the support rod 2 to complete the assembly of the tension and torsion structure.

[0054] For example, in one embodiment of the invention, such as Figure 1 and Figure 2 As shown, the tension-torsion structure consists of two end caps 7 with 12 mounting slots and several composite material tension-torsion strips arranged circumferentially along the mounting slots of the end caps 7. The end caps 7 and the composite material tension-torsion strips are fixed together with adhesive.

[0055] During assembly, first thread both ends 7 onto the central support rod 2 with their mounting slots facing opposite directions. Install limiting strips 6 evenly between both ends 7. At this stage, do not apply adhesive to the mounting slots of the ends 7 so that after the other composite material tension / torsion strips are glued together, remove the limiting metal strips and glue the composite material tension / torsion strips. As shown in the diagram, the tension / torsion structure has a total of 12 composite material tension / torsion strips, with four limiting strips 6 arranged at the three o'clock, six o'clock, nine o'clock, and twelve o'clock positions.

[0056] After initially determining the position of end 7 using the limiting strip 6, install the mating blocks 5 respectively, and use clips to secure end 7 and its mating blocks 5. Tighten the nuts at both ends of the support rod 2, while determining the distance between the two end 7s, to ensure that the two end 7s do not twist or slide on the support rod 2 during the adhesive process, thus achieving accurate positioning of each component.

[0057] Place the assembled structure onto the support 1 with a groove at the top. Apply adhesive to the mounting grooves on the other ends 7 of the limiting strip 6 that are not yet installed. Then, sequentially bond the remaining eight composite material tension / torsion strips. After the adhesive has cured and the eight composite material tension / torsion strips are bonded, remove the four limiting strips 6 and complete the bonding and positioning of the last four composite material tension / torsion strips using the same method. After all the composite material tension / torsion strips have been bonded and cured, remove the nuts, clips, mating blocks 5, and support rods 2 to complete the assembly of the tension / torsion structure.

[0058] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A tensile-torsional structure assembly tool characterized by, The utility model relates to a kind of tension-torsion structure, comprising: Supporting rod; Support, the support is used to place two ends of the supporting rod, the two ends of tension-torsion structure are arranged at intervals on the supporting rod, and the side with installation slot of two ends is arranged opposite; Several limit strips, the two ends of each limit strip are respectively loaded into the installation slot of each of two ends, and the two installation slots assembled with the same limit strip are aligned with each other; Two fixed components, two fixed components are used to fix one end head in the set position of the supporting rod respectively.

2. The pull-twist assembly tool of claim 1, wherein, The fixed component comprises: Fitting block, the fitting block is sleeved on the supporting rod, and is attached to the side of corresponding end head away from another end head; Fastener, the fastener is arranged on the side of the fitting block away from corresponding end head, is connected on the supporting rod, so that the fitting block supports and limits corresponding end head.

3. The pull -twist assembly tool of claim 2, wherein, The fixed component further comprises: Locking member, the locking member connects the fitting block and corresponding end head, for limiting the rotation of corresponding end head on the supporting rod relative to the fitting block.

4. The pull-twist assembly tool of claim 3, wherein, The inner hole of the fitting block is a regular polygon hole, and the supporting rod is located in the position of the fitting block and is formed with a regular polygon column adapted to the regular polygon hole.

5. The pull -twist assembly tool of claim 3, wherein, The locking member is a buckle.

6. The pull -twist assembly tool of claim 2, wherein, The middle part of the fitting block has a protruding part towards the side of corresponding fastener.

7. The pull -twist assembly tool of claim 2, wherein, The fastener is a nut.

8. The pull -twist assembly tool of claim 1, wherein, The number of limit strips is more than three.

9. The pull -twist assembly tool of claim 1, wherein, The two ends of the limit strip are adapted to corresponding installation slot respectively.

10. A method of assembling a tensile torsion structure using the assembly tool of any one of claims 1 to 9, characterized by, The method comprises the following steps: Two ends of tension-torsion structure are arranged at intervals on the supporting rod, and the side with installation slot of two ends is arranged opposite; Several limit strips are installed in corresponding installation slot on two ends one by one, and two fixed components are used to fix corresponding end head and supporting rod respectively, so that two end heads are accurately positioned by limit strip and fixed component; The supporting rod with end head and limit strip is placed horizontally on the support; Glue is coated in other installation slot of end head without limit strip, and tension-torsion strip is bonded in sequence in turn; After the glue of installed tension-torsion strip is cured, each limit strip is removed, and the installation of remaining installation slot of tension-torsion strip is completed using glue continuously; After all tension-torsion strips are glued and cured, two end heads and tension-torsion strips are removed from the support and the supporting rod, and the assembly work of tension-torsion structure is completed.

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