A rotor head quick release mechanism and rotorcraft

Abstract

The utility model relates to a kind of quick-release mechanism of rotor head and gyroplane, including rotor support beam, output rod, rotor head, quick-release mechanism and rotor body, output rod is rotatably installed in the rotor support beam, and output rod upper end is through the top of rotor support beam and extends, the top of output rod is equipped with rotor head, the both sides of rotor head are fixedly installed with rotor body, when installing, due to the conical seat being equipped with installation pipe bottom, with the annular inclined surface of support pipe top adaptation, it is convenient to insert installation pipe into support pipe, and installation pipe surface guide strip is adapted with support pipe surface guide groove, the installation of installation pipe is guided and limited, the rectangular slot in upper plate is connected with support block, simultaneously, it is supported to rotor head, the hole in support block and the sliding slot in upper plate are relative at this time, rectangular plate surface threaded rod is inserted into sliding slot, threaded rod is through the hole in support block, and is screwed with limiting nut, the fixation of installation pipe and support pipe can be realized.

Description

Technical Field

[0001] This utility model relates to the field of rotorcraft technology, specifically to a rotor head quick-release mechanism and a rotorcraft. Background Technology

[0002] In existing small civilian gyroplane technology, the connection between the rotor head and the output rod is mostly rigidly fixed with bolt groups or a complex bushing engagement structure. When maintenance of the rotor head and rotor body is required, such as cleaning the blades, checking the wear of rotating parts, or disassembling the rotor assembly during transportation to reduce the overall space occupied by the aircraft, or replacing the rotor head or rotor body due to malfunction, it is necessary to use special tools to disassemble multiple fixing bolts one by one or unlock the complex engagement structure. This is not only cumbersome and time-consuming, but also more difficult in outdoor operations or other scenarios where professional tools are lacking, which seriously affects the efficiency of operation and causes great inconvenience to users. Therefore, we need to provide a rotor head quick-release mechanism and a gyroplane. Summary of the Invention

[0003] The purpose of this utility model is to provide a quick-release mechanism for the rotor head and a rotorcraft. A quick-release structure is provided between the rotor head and the output rod, which facilitates the removal of the rotor head and rotor body from the top of the rotor support beam. The rotor head and output rod can be separated through simple operation, which greatly shortens the disassembly time and improves the work efficiency in maintenance, transportation and other scenarios. It avoids the high requirements for operation skills when unlocking complex bushing locking structures. Ordinary users can complete the disassembly skillfully after simple learning, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a rotor head quick-release mechanism, comprising: The rotor includes a rotor support beam, an output rod, a rotor head, a quick-release mechanism, and a rotor body. The output rod is rotatably installed inside the rotor support beam, and its upper end extends through the top of the rotor support beam. The rotor head is located at the top of the output rod, and rotor bodies are fixedly installed on both sides of the rotor head. The quick-release mechanism is installed between the output rod and the rotor head to facilitate the separation of the rotor head from the output rod.

[0005] Preferably, the quick-release mechanism includes a support tube, a mounting tube, a support block, and a fixing component. The support tube is fixed to the top of the output rod, the mounting tube is fixed to the bottom of the rotor head, and support blocks with holes are welded to both sides of the mounting tube. The fixing component is used to fix the mounting tube after it is inserted into the support tube.

[0006] Preferably, the fixing component includes an upper plate, a sliding groove, a threaded rod, a rectangular plate, and a limiting nut. The upper plate is fixed to the surface of the support tube and has two sliding grooves inside. A threaded rod is slidably installed in each of the two sliding grooves. A rectangular plate is fixedly installed at one end of each threaded rod. One end of the threaded rod passes through the inner hole of the support block and is threaded with a limiting nut.

[0007] Preferably, rectangular grooves for engaging the support blocks are provided on both sides of the top of the upper plate.

[0008] Preferably, guide grooves are provided on both sides of the top of the support tube, and guide strips adapted to the guide grooves are welded to both sides of the mounting tube.

[0009] Preferably, it also includes a support member, which includes a support bar, a lower plate and a slot. The support bar is fixed to one side of the rectangular plate, the lower plate is fixedly sleeved on the surface of the support tube and has a slot inside, the slot penetrates the support tube, and the support bar is adapted to the slot.

[0010] Preferably, a slot is provided on one side of the rectangular plate, and one side of both the upper plate and the lower plate abuts against the inner wall of the slot.

[0011] Preferably, the support bar and the two threaded rods are provided with through holes on their surfaces.

[0012] Preferably, a conical seat is fixedly installed at the bottom of the mounting tube, and an annular inclined surface adapted to the conical seat is opened at the top of the support tube.

[0013] A rotorcraft includes the aforementioned rotor head quick-release mechanism.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention features a quick-release structure between the rotor head and the output rod, facilitating the removal of the rotor head and rotor body from the top of the rotor support beam. Separation of the rotor head and output rod is achieved through simple operation, significantly reducing disassembly time and improving work efficiency in maintenance and transportation scenarios. It avoids the high skill requirements associated with unlocking complex bushing engagement structures, allowing ordinary users to easily learn and master the disassembly process, reducing the risk of component damage due to improper operation and ensuring the normal use of the equipment. Attached Figure Description

[0015] Figure 1 This is a partial three-dimensional structural view of the present invention; Figure 2 This is a three-dimensional structural view of the present invention; Figure 3 This is a perspective view of the support tube of this utility model; Figure 4 This is a perspective view of the fixing and supporting components of this utility model; Figure 5 This is a partial three-dimensional exploded view of the present invention.

[0016] In the diagram: 1. Rotor support beam; 2. Output rod; 3. Rotor head; 4. Quick release mechanism; 41. Support tube; 42. Mounting tube; 43. Support block; 44. Fixing component; 441. Upper plate; 442. Slide groove; 443. Threaded rod; 444. Rectangular plate; 445. Limit nut; 5. Rotor body; 6. Rectangular groove; 7. Guide groove; 8. Guide bar; 9. Support component; 91. Support bar; 92. Lower plate; 93. Slot; 10. Slot; 11. Through hole; 12. Conical seat. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 This utility model provides a technical solution: a rotor head quick-release mechanism, comprising: The rotor support beam 1, output rod 2, rotor head 3, quick release mechanism 4, and rotor body 5 are included. The output rod 2 is rotatably installed inside the rotor support beam 1, and the upper end of the output rod 2 passes through the top of the rotor support beam 1 and extends thereto. The rotor head 3 is provided at the top of the output rod 2. The rotor body 5 is fixedly installed on both sides of the rotor head 3. The quick release mechanism 4 is installed between the output rod 2 and the rotor head 3 to facilitate the separation of the rotor head 3 from the output rod 2.

[0019] The quick-release mechanism 4 includes a support tube 41, an mounting tube 42, a support block 43, and a fixing member 44. The support tube 41 is fixed to the top of the output rod 2, the mounting tube 42 is fixed to the bottom of the rotor head 3, and support blocks 43 with holes are welded to both sides of the mounting tube 42. The fixing member 44 is used to fix the mounting tube 42 after it is inserted into the support tube 41. Specifically, a quick-release structure is provided between the rotor head 3 and the output rod 2, which facilitates the removal of the rotor head 3 and the rotor body 5 from the top of the rotor support beam 1. The rotor head 3 and the output rod 2 can be separated through simple operation, which greatly shortens the disassembly time and improves the work efficiency in maintenance, transportation and other scenarios. It avoids the high requirements for operation skills when unlocking complex bushing locking structures. Ordinary users can complete the disassembly proficiently after simple learning, reducing the risk of component damage caused by improper operation, ensuring the normal use of the equipment, and allowing the rotor head 3 and the rotor body 5 to be removed as a whole, which facilitates unified maintenance, transportation and storage or fault replacement, and improves the convenience and integrity of handling these two key components.

[0020] like Figure 4 As shown, the support tube 41 is made of high-strength aluminum alloy and is fixed to the top of the output rod 2 by a key connection; the mounting tube 42 is made of titanium alloy (TC4) and is fixed to the bottom of the rotor head 3 by argon arc welding. 45# steel support blocks 43 are symmetrically welded to both sides of the mounting tube 42. The holes of the support blocks 43 and the key connection between the support tube 41 and the output rod 2 ensure efficient torque transmission. The welding and fixing of the mounting tube 42 and the rotor head 3 ensures the overall structural stability.

[0021] The fastener 44 includes an upper plate 441, a sliding groove 442, a threaded rod 443, a rectangular plate 444, and a limiting nut 445. The upper plate 441 is fixed to the surface of the support tube 41. Two sliding grooves 442 are opened inside the upper plate 441. Threaded rods 443 are slidably installed in both sliding grooves 442. A rectangular plate 444 is fixedly installed at one end of each threaded rod 443. One end of the threaded rod 443 passes through the inner hole of the support block 43 and is threaded with a limiting nut 445. It is worth noting that, such as Figure 4 As shown, the upper plate 441 is made of 40Cr material and is welded and fixed to the surface of the support tube 41. Two grooves 442 are opened inside it, with a groove width tolerance of H8 and a groove depth 1.2 times the diameter of the threaded rod 443. The threaded rod 443 is made of 35CrMo alloy structural steel, with a surface tempered (hardness 28-32HRC). One end is welded and fixed to a rectangular plate 444 made of Q235 material, and stress relief treatment is performed after welding. The other end of the threaded rod 443 passes through the inner hole of the support block 43 and is threadedly connected to a self-locking limit nut 445 with a thread accuracy of 6g. A 0.3mm thick spring washer is provided between the limiting nut 445 and the support block 43. During disassembly, the limiting nut 445 is unscrewed, and the threaded rod 443 can be pulled along the slide groove 442 to slide away from the support block 43 via the rectangular plate 444. During installation, the threaded rod 443 is inserted into the hole of the support block 43 along the slide groove 442 and then the limiting nut 445 is screwed in. The spring washer can compensate for the thread clearance, which solves the cumbersome problem of disassembling traditional bolt groups by one operation. Unlocking / locking can be achieved by a single operation. Moreover, the high strength of the threaded rod 443 avoids deformation caused by frequent disassembly and improves the service life of the components.

[0022] Rectangular grooves 6 for engaging the support block 43 are provided on both sides of the top of the upper plate 441; Specifically, such as Figure 5As shown, the rectangular groove 6 and the support block 43 are fitted with a transition fit (tolerance zone H7 / k6); the inner wall of the rectangular groove 6 is covered with a 0.2mm thick polytetrafluoroethylene wear-resistant layer with a friction coefficient ≤0.04. The transition fit between the rectangular groove 6 and the support block 43 achieves radial positioning; the polytetrafluoroethylene wear-resistant layer reduces friction and wear between the support block 43 and the rectangular groove 6, improves the stability of repeated disassembly, and avoids abnormal noise caused by direct metal contact.

[0023] The top two sides of the support tube 41 are provided with guide grooves 7, and the two sides of the mounting tube 42 are welded with guide strips 8 that are compatible with the guide grooves 7; It should be noted that, as Figure 4 As shown, the length of the guide groove 7 is 1.5 times the insertion depth of the mounting tube 42, and the groove wall roughness is ≤Ra3.2μm. Guide strips 8 adapted to the guide groove 7 are welded on both sides of the mounting tube 42. The guide strips 8 are made of wear-resistant cast iron, and the clearance between their cross-sectional dimensions and the guide groove 7 is 0.01-0.03mm. The surface of the guide strips 8 is coated with a 0.05mm thick ceramic wear-resistant coating. When the mounting tube 42 is inserted into the support tube 41, the guide strips 8 slide to achieve axial guidance, which solves the problem of easy skew of the mounting tube 42 in the traditional structure. This not only ensures the guiding accuracy but also improves the wear resistance, so that it can maintain good fitting accuracy even after long-term use.

[0024] It also includes a support member 9, which includes a support bar 91, a lower plate 92 and a slot 93. The support bar 91 is fixed to one side of the rectangular plate 444, the lower plate 92 is fixedly sleeved on the surface of the support tube 41 and has a slot 93 inside. The slot 93 passes through the support tube 41 and the support bar 91 is adapted to the slot 93. Specifically, the support bar 91 is made of 20# steel and is welded and fixed to one side of the rectangular plate 444, with a rectangular cross-section; the lower plate 92 is made of Q355B material and is interference-fitted with the support tube 41 (interference amount 0.01-0.02mm); the inner wall of the slot 93 is provided with a lubricating oil groove. The support bar 91 moves with the rectangular plate 444 to insert / disengage from the slot 93, forming a "double fulcrum" fixing structure with the threaded rod 443, which solves the problem of uneven load when fixed with a single threaded rod 443. The lubricating oil groove reduces the resistance when the support bar 91 slides, improving the smoothness of operation.

[0025] A slot 10 is provided on one side of the rectangular plate 444, and the upper plate 441 and the lower plate 92 both abut against the inner wall of the slot 10. It is worth noting that a slot 10 is provided on one side of the rectangular plate 444. The upper plate 441 and the lower plate 92 both abut against the inner wall of the slot 10. The slot 10 forms an axial limit on the upper plate 441 and the lower plate 92. Copper foil can be installed in the slot 10. With the elastic compensation effect of the copper foil, the gap problem caused by component assembly error is solved, the vibration and abnormal noise during rotor operation are avoided, and the structural stability is improved.

[0026] Through holes 11 are provided on the surfaces of the support bar 91 and the two threaded rods 443; The diameter of the through hole 11 is 3-5mm. The inner wall of the through hole 11 is chamfered, and a high-strength steel wire (tensile strength ≥1500MPa) can be inserted into the hole. After the steel wire is inserted into the through hole 11, a secondary safety is formed, which solves the risk of the limit nut 445 falling off due to accidental loosening. The high-strength steel wire ensures the reliability of the safety function, and is especially suitable for rotor working environments with frequent vibration.

[0027] A conical seat 12 is fixedly installed at the bottom of the mounting tube 42, and an annular inclined surface adapted to the conical seat 12 is opened at the top of the support tube 41; The conical seat 12 is made of martensitic stainless steel and is connected to the bottom of the mounting tube 42 by brazing. The brazing layer thickness is 0.1-0.2mm, and the conical angle of the conical seat 12 is 30°-45°, with a surface roughness ≤Ra0.8μm. The top of the support tube 41 has an annular inclined surface that matches the conical seat 12. The annular inclined surface is laser surface hardened, and the angle of the inclined surface is consistent with the conical angle of the conical seat 12. During installation, the conical surface of the conical seat 12 and the annular inclined surface form a surface contact fit. With the guiding effect of the conical surface, the coaxiality of the mounting tube 42 and the support tube 41 can be quickly aligned.

[0028] A rotorcraft includes a rotor head 3 and a quick-release mechanism 4.

[0029] All threaded mounting surfaces in this application utilize a modified triangular thread with a self-locking function. The thread helix angle is designed to be 1.5°-2.5° to enhance the anti-loosening effect. After phosphating, the thread surface is coated with an 8-12μm Dacromet coating and impregnated with silicone sealant to form a sealing layer, resulting in excellent corrosion resistance. In addition, the thread can effectively expel dust, and it can still be used normally even if a small amount of dust adheres to it.

[0030] When the rotor head 3 needs to be separated from the output rod 2, the limiting nut 445 is removed from the threaded rod 443, and the rectangular plate 444 is pulled. The rectangular plate 444 moves to pull the threaded rod 443 out of the groove 442 in the upper plate 441. At the same time, the support bar 91 is pulled out of the slot 93 in the mounting tube 42. At this time, simply lift the rotor head 3 to pull the mounting tube 42 out of the support tube 41. During installation, since the bottom of the mounting tube 42 is provided with a conical seat 12 that matches the annular inclined surface at the top of the support tube 41, it is convenient to insert the mounting tube 42 into the support tube 41. Furthermore, the guide bar 8 on the surface of the mounting tube 42 matches the guide groove 7 on the surface of the support tube 41, which plays a guiding and limiting role in the installation of the mounting tube 42. The rectangular groove 6 in the upper plate 441 and the... The support block 43 is engaged and simultaneously supports the rotor head 3. At this time, the inner hole of the support block 43 is aligned with the sliding groove 442 in the upper plate 441. The threaded rod 443 on the surface of the rectangular plate 444 is inserted into the sliding groove 442. The threaded rod 443 passes through the hole in the support block 43 and is threadedly installed with the limit nut 445, thereby fixing the mounting tube 42 and the support tube 41. During the movement of the rectangular plate 444, the surface support strip 91 passes through the lower plate 92, the support tube 41 and the slot 93 in the mounting cylinder and extends. Through holes 11 are provided on the surface of the two threaded rods 443 and in the support strip 91, through which steel wires can pass, which serves as a safety measure. The rotorcraft in this application is a small civilian rotorcraft, so the material of the rotor head 3 is lighter than that of a large rotorcraft.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-release mechanism for a rotor head, characterized in that, include: The rotor includes a rotor support beam, an output rod, a rotor head, a quick-release mechanism, and a rotor body. The output rod is rotatably installed inside the rotor support beam, and its upper end extends through the top of the rotor support beam. The rotor head is located at the top of the output rod, and rotor bodies are fixedly installed on both sides of the rotor head. The quick-release mechanism is installed between the output rod and the rotor head to facilitate the separation of the rotor head from the output rod.

2. The rotor head quick-release mechanism according to claim 1, characterized in that: The quick-release mechanism includes a support tube, a mounting tube, a support block, and a fixing component. The support tube is fixed to the top of the output rod, the mounting tube is fixed to the bottom of the rotor head, and support blocks with holes are welded to both sides of the mounting tube. The fixing component is used to fix the mounting tube after it is inserted into the support tube.

3. The rotor head quick-release mechanism according to claim 2, characterized in that: The fastener includes an upper plate, a sliding groove, a threaded rod, a rectangular plate, and a limiting nut. The upper plate is fixed to the surface of the support tube and has two sliding grooves inside. A threaded rod is slidably installed in each of the two sliding grooves. A rectangular plate is fixedly installed at one end of each threaded rod. One end of the threaded rod passes through the inner hole of the support block and is threaded with a limiting nut.

4. A rotor head quick-release mechanism according to claim 3, characterized in that: The top of the upper plate has rectangular grooves on both sides for the support blocks to engage.

5. A rotor head quick-release mechanism according to claim 2, characterized in that: The support tube has guide grooves on both sides of its top, and the mounting tube has guide strips welded to both sides that are compatible with the guide grooves.

6. A rotor head quick-release mechanism according to claim 1, characterized in that: It also includes a support member, which includes a support bar, a lower plate and a slot. The support bar is fixed to one side of the rectangular plate, the lower plate is fixedly sleeved on the surface of the support tube and has a slot inside, the slot penetrates the support tube, and the support bar is adapted to the slot.

7. A rotor head quick-release mechanism according to claim 4, characterized in that: A slot is provided on one side of the rectangular plate, and both the upper and lower plates abut against the inner wall of the slot.

8. A rotor head quick-release mechanism according to claim 6, characterized in that: The support bar and the two threaded rods are all provided with through holes.

9. A rotor head quick-release mechanism according to claim 2, characterized in that: A conical seat is fixedly installed at the bottom of the mounting tube, and an annular inclined surface adapted to the conical seat is opened at the top of the support tube.

10. A rotorcraft comprising the rotor head quick-release mechanism as described in any one of claims 1-9.

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