Multifunctional traction joint device

Abstract

The utility model belongs to the technical field of structural design, and particularly relates to a multifunctional traction joint device which is characterized by comprising a wheel shaft, a traction joint and three groups of fixing bolts, a through hole is formed in the middle of the wheel shaft, and three first radial mounting holes are evenly distributed in the wheel shaft in the circumferential direction. The traction joint is in a hollow cylinder shape, and three second radial mounting holes are uniformly distributed in one end of the traction joint in the circumferential direction; fixing bolts penetrate through the first radial mounting hole and the second radial mounting hole to fix the traction joint and the wheel shaft; the outer surface of the side, away from the axle, of the traction connector is a traction section, and annular radial protrusions are arranged at the front end and the rear end of the traction section.

Description

Technical Field

[0001] The utility model belongs to the technical field of structural design, and specifically relates to a multi-functional traction joint device. Background Art

[0002] In the maintenance, upkeep, and other usage scenarios of helicopters, it is necessary to achieve the traction of helicopters to ensure the safe and directional movement of helicopters. When conducting rod-type traction for helicopter transfer, a reliable traction joint device is required on the helicopter to ensure a docking interface between the helicopter and the tow vehicle, facilitating the execution of traction operations; at the same time, the space on the helicopter is limited, and the traction interface position is often also used as a mooring position. For the traction design at the end of the helicopter landing gear wheel axle, it also needs to meet the function of being used as a wheel axle plug and should have a sealing function. Currently, most helicopter traction forms are at the end of the landing gear wheel axle, and the traction joint is generally a single mechanical joint. If the helicopter has multiple functional requirements such as traction, mooring, and sealing, conventional traction joints are difficult to meet the complex usage needs of helicopters. Content of the Utility Model

[0003] Objective of the utility model: To enable the traction joint device of the helicopter landing gear to have the sealing function of mooring and being used as a wheel axle plug, the utility model designs a multi-functional traction joint device, which has the function of realizing multiple uses, can be quickly installed and is convenient for maintenance, not only meets the traction requirements but also facilitates mooring.

[0004] Technical solution of the utility model:

[0005] A multi-functional traction joint device, comprising: a wheel axle, a traction joint, and three groups of fixing bolts;

[0006] A through hole is provided in the middle of the wheel axle, and three first radial mounting holes are evenly distributed along the circumferential direction of the wheel axle;

[0007] The traction joint is in the shape of a hollow cylinder, and three second radial mounting holes are evenly distributed along the circumferential direction at one end of the traction joint;

[0008] The traction joint and the wheel axle are fixed by passing the fixing bolts through the first and second radial mounting holes;

[0009] The outer surface of the side of the traction joint away from the wheel axle is a traction section, and annular radial protrusions are provided at both the front and rear ends of the traction section.

[0010] Further, the device further comprises: a round nut;

[0011] External threads are provided on the outer side of the wheel axle;

[0012] The round nut is screwed on the outer side of the wheel axle, and six U-shaped grooves are evenly distributed along the circumferential direction on one end face of the round nut;

[0013] Three groups of fixing bolts pass through three U-shaped grooves in the round nut to limit the round nut;

[0014] The round nut is used to press the wheel mounted on the axle.

[0015] Furthermore, the device further includes: a mooring joint, a self-locking nut, and a mooring ring;

[0016] The inside of the towing joint is a stepped hole and the diameter on the side away from the axle is smaller;

[0017] One end of the mooring joint is provided with an external thread, a radial protrusion is provided in the middle, and a single ear is provided at the other end;

[0018] The end of the mooring joint with the external thread extends into the stepped hole of the towing joint, and the self-locking nut is screwed onto the external thread end of the mooring joint and is locked in cooperation with the stepped surface of the stepped hole of the towing joint;

[0019] The radial protrusion is used for radial limit of the mooring joint;

[0020] The mooring ring is provided with double ears, and the double ears of the mooring ring are hinged to the single ear of the mooring joint through a rotating shaft.

[0021] Furthermore, the towing section of the towing joint is provided with a wear-resistant hard layer.

[0022] Furthermore, a smooth rod section is provided between the external thread section of the mooring joint and the radial protrusion, and the smooth rod section has a clearance fit with the smaller diameter section of the stepped hole of the towing joint.

[0023] Furthermore, a sealing ring is provided between the smooth rod section of the mooring joint and the smaller diameter section of the stepped hole of the towing joint.

[0024] The beneficial technical effects of the present utility model:

[0025] 1. Simple structure and low manufacturing cost;

[0026] 2. The angle of the mooring ring body is always vertically downward after installation, preventing water accumulation and corrosion of the material matrix.

[0027] 3. The installation and separation of the towing joint and the mooring joint are convenient, with good maintainability, light weight, flexible adjustment and high reliability;

[0028] 4. The whole device adopts a modular design and can be interchanged as a whole; at the same time, the towing joint and the mooring joint are detachably connected, and the whole device can be disassembled into a mooring device (including the mooring joint, the mooring ring body and the fasteners between them), a towing joint, etc. The mooring device can also be replaced separately as a sub-module, with the characteristic of universality;

[0029] 5. The whole device is small in size;

[0030] 6. The entire device realizes the advantages of quick assembly and disassembly;

[0031] 7. The force transmission path of the main structure is simple and can withstand large loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a multi-functional traction joint device;

[0033] Figure 2 It is a schematic diagram of the disassembly of parts of a multi-functional traction joint device;

[0034] Figure 3 It is a schematic diagram of the connection between a round nut and a wheel shaft;

[0035] Figure 4 It is a sectional view taken along the A-A plane;

[0036] Figure 5 It is a sectional view taken along the B-B plane;

[0037] Figure 6 It is a schematic diagram of a mooring unit;

[0038] Figure 7 It is a schematic diagram of a mooring joint;

[0039] Figure 8 It is a schematic diagram of a mooring ring body;

[0040] Number description: 1. Traction joint; 2. Mooring joint; 3. Mooring ring body; 4. Nut; 5. Rotating shaft; 6. Round nut; 7. Fixed bolt; 8. Wheel shaft; 9. Hard layer; 10. U-shaped groove; 11. Fixed mounting hole; 12. Self-locking nut; 13. First shoulder surface; 14. Second shoulder surface; 15. First sealing ring; 16. Second sealing ring; 17. Stop boss; 18. Arc groove; 19. Single ear; 20. Double ear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0042] A multi-functional traction joint device is composed of multiple functional devices: including a traction joint device, a mooring device, and a sealing body. The traction joint device is composed of a traction joint 1, a round nut 6, a fixed bolt 7, and a wheel shaft 8. The mooring device is composed of a mooring joint 2, a mooring ring body 3, a nut 4, and a rotating shaft 5. The sealing body is composed of a first sealing ring 15 and a second sealing ring 16;

[0043] As Figure 1 , there are three fixed mounting holes 11 evenly distributed circumferentially on both the towing joint 1 and the axle 8. During installation, first align the fixed mounting holes 11 on the towing joint 1 with those on the axle 8, and then cooperate with the U-shaped groove 10 on the round nut 6. When the round nut 6 rotates to make the U-shaped groove overlap with the fixed mounting holes 11, insert the fixing bolt 7 into the fixed mounting holes 11 to fixedly mount the towing joint 1 on the axle 8. The round nut 6 can limit and lock components such as the wheels mounted on the landing gear axle; In particular, the number of U-shaped grooves evenly distributed circumferentially on the round nut 6 is twice the number of fixed mounting holes 11, which enables the round nut 6 to obtain an effective position coinciding with the fixed mounting holes 11 by rotating only zero to one-sixth of a turn during installation, facilitating the installation of the round nut 6. Otherwise, the round nut 6 may need to rotate beyond this value during installation, making it impossible to ensure that the axial position of the round nut 6 along the axle 8 is exactly or close to the end of the axle 6; The towing joint 1 has a first shoulder surface 13 and a second shoulder surface 14, which can be used as the limiting table surface of the tractor along the axle axis; At the same time, the towing section of the towing joint 1 has a hard layer 9 (such as a high-velocity oxy-fuel sprayed WC-10Co4Cr layer, a hard chromium plating layer but not limited to), which can endow the towing section of the towing joint 1 with high wear resistance and prevent damage to its own part substrate;

[0044] The towing joint 1 has a through hole concentric with the rod body of the mooring joint 2. The mooring joint 2 is inserted into the through hole of the towing joint 1 and axially limited by the stop boss 17. The other end of the mooring joint 2 is fastened and limited by a lock nut 12, thus maintaining the overall position fixed;

[0045] As Figure 6 、 Figure 7 shown, the mooring ring body 3 has double ears 20, and the mooring joint 2 has a single ear 19; Both the double ears 20 and the single ear 19 have mounting through holes, and are connected to the mooring ring body 3 and the mooring joint 2 through the rotating shaft 5 and fastened by a nut 4. At the same time, anaerobic glue (using LOCTITE 242 but not limited to) can be coated on the rod body of the rotating shaft 5 to prevent loosening;

[0046] In particular, the mooring ring body 3 can rotate around the rotating shaft 5, and the mooring joint 2 can axially rotate around its central axis, thereby realizing two degrees of freedom of movement of the mooring ring body 3, enabling the mooring cable to moor the mooring ring body 3 in a vertical manner to the mooring ring body;

[0047] The towing joint 1 has an internal groove to accommodate the first sealing ring 15 and an external groove to accommodate the second sealing ring 16, preventing external humid water vapor from entering the axle interior and causing corrosion.

[0048] 1. The traction function, mooring function, and sealing function of the entire device are integrated, which can meet the requirements of helicopters for various functions. In terms of operation, the installation of the traction rod and the disconnection of the mooring lock can be carried out at the same position, which can save operation time and facilitate quick implementation of the operation.

[0049] 2. The number of U-shaped grooves evenly distributed along the circumference of the round nut 6 is twice the number of fixed mounting holes 11, which enables the round nut 6 to obtain an effective position coinciding with the fixed mounting holes 11 by simply rotating zero to one-sixth of a turn during installation, facilitating the installation of the round nut 6.

[0050] 3. The traction section of the traction joint 1 has a hard layer 9 (such as but not limited to a supersonic flame sprayed WC-10Co4Cr layer), which enables the traction section of the traction joint 1 to obtain high wear resistance and prevent damage to the matrix of its own parts.

[0051] 4. The traction joint 1 has an internal groove to accommodate the first sealing ring 15 and an external groove to accommodate the second sealing ring 16, preventing external humid water vapor from entering the inside of the wheel axle and causing corrosion.

[0052] 5. An arc-shaped groove 18 is circumferentially arranged along the rotation axis at the position corresponding to the double ears 20 of the rotating part of the mooring ring 3 on the mooring joint 2. The mooring ring rotates around the rotation axis to keep the distance from the mooring joint unchanged (the distance between the moving part and the static part).

[0053] 6. The mooring ring body 3 can rotate around the rotation axis 5, and the mooring joint 2 can axially rotate around its central axis, thereby realizing two degrees of freedom of movement of the mooring ring body 3, enabling the mooring cable to moor the mooring ring body 3 in a vertical manner to the mooring ring body.

[0054] 7. The traction joint 1 has a through hole concentric with the rod body of the mooring joint 2. The through hole is a tapered hole, and the large end of the tapered hole is adjacent to the mooring ring body 3. The mooring joint 2 has a 3° taper to cooperate with the tapered through hole of the traction joint, facilitating quick plugging and unplugging and reducing the risk of installation jamming, saving the time for hole alignment. At the same time, the mooring joint is axially limited by the stop boss 17, and the other end of the mooring joint is fastened and limited by the self-locking nut 12, thereby maintaining the overall position of the mooring joint fixed.

[0055] 8. The round nut 6 has an internal thread, and the end of the wheel axle 8 has an external thread. The round nut is screwed onto the end of the wheel axle to lock the upper wheel of the landing gear.

[0056] 9. The entire device adopts a modular design and can be interchanged as a whole. At the same time, the traction joint and the mooring joint are detachably connected. The entire device can be disassembled into a mooring device (including the mooring joint, mooring ring body, and fasteners between them), traction joint, etc. The mooring device can also be replaced separately as a sub-module, featuring versatility.

[0057] The above are only specific embodiments of the present utility model. The present utility model has been described in detail, and the parts not elaborated are conventional technologies. However, the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A multifunctional traction joint device, characterized in that: The device includes: a wheel axle, a traction joint, and three groups of fixing bolts; A through hole is provided in the middle of the wheel axle, and three first radial mounting holes are evenly distributed along the circumferential direction of the wheel axle; The traction joint is in the shape of a hollow cylinder, and three second radial mounting holes are evenly distributed along the circumferential direction at one end of the traction joint; The traction joint and the wheel axle are fixed by passing the fixing bolts through the first and second radial mounting holes; The outer surface of the side of the traction joint away from the wheel axle is a traction section, and annular radial protrusions are provided at both the front and rear ends of the traction section.

2. The device according to claim 1, wherein: The device further includes: a round nut; External threads are provided on the outer side of the wheel axle; The round nut is screwed on the outer side of the wheel axle, and six U-shaped grooves are evenly distributed along the circumferential direction on one end face of the round nut; Three groups of fixing bolts pass through three of the U-shaped grooves in the round nut to limit the round nut; The round nut is used to press the wheel mounted on the wheel axle.

3. The device according to claim 2, characterized in that: The device further includes: a mooring joint, a self-locking nut, and a mooring ring; The inside of the traction joint is a stepped hole and the diameter of the side away from the wheel axle is smaller; One end of the mooring joint is provided with external threads, a radial protrusion is provided in the middle, and a single ear is provided at the other end; One end of the mooring joint with external threads extends into the stepped hole of the traction joint, and the self-locking nut is screwed on the external thread end of the mooring joint and is locked in cooperation with the stepped surface of the stepped hole of the traction joint; The radial protrusion is used for radially limiting the mooring joint; The mooring ring is provided with double ears, and the double ears of the mooring ring are hinged to the single ear of the mooring joint through a rotating shaft.

4. The device according to claim 3, characterized in that: A wear-resistant hard layer is provided on the traction section of the traction joint.

5. The device according to claim 4, wherein: A smooth rod section is provided between the external thread section of the mooring joint and the radial protrusion, and the smooth rod section has a clearance fit with the smaller diameter section of the stepped hole of the traction joint.

6. The device according to claim 5, characterized in that: A sealing ring is provided between the smooth rod section of the mooring joint and the smaller diameter section of the stepped hole of the traction joint.

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