Multi-redundancy rotary supporting device

Abstract

The invention belongs to the technical field of actuating mechanism design, and particularly relates to a multi-redundancy rotary supporting device. Comprising a main case (1), a supporting sleeve (3), a rotating support (4), a first thin pin shaft (7), two tapered roller bearings (10), a cylindrical roller bearing (12), a rubber pad (19), a thick pin shaft (20) and a second thin pin shaft (21), and the rotating support (4) is supported on the supporting sleeve (3) through the two tapered roller bearings (10) and the cylindrical roller bearing (12) in a cantilever mode; the upper side and the lower side of the main case (1) and the rotating support (4) form a rotating pair through a first thin pin shaft (7) and a second thin pin shaft (21) respectively, so that the main case (1) can rotate in the Y direction. A thick pin shaft (20) is designed on the right side of the main case (1), a rubber pad (19) is designed on the surface of the thick pin shaft (20), and the main case (1) is allowed to rotate in the Y direction.

Description

Technical Field

[0001] The invention belongs to the technical field of actuating mechanism design, and in particular relates to a redundant rotation support device. Background Art

[0002] The actuating mechanism is a key component for realizing the conversion of a helicopter from helicopter mode to fixed-wing mode. As an important component of the actuating mechanism, the rotating support device is designed to realize the installation of the actuating mechanism on the fuselage structure. In order to adapt to the deformation of the nacelle during helicopter flight and compensate for manufacturing and assembly tolerances, a rotating support device with dual rotational degrees of freedom needs to be designed. When designing the rotating support device, it is also necessary to consider the impact of the deformation of the installation fuselage structure on the support device and measures to improve the life of the support device. Summary of the invention

[0003] Purpose of the invention: To provide a redundant rotation support device to improve the life and reliability of the rotation support assembly.

[0004] Technical solution:

[0005] A redundant rotation support device comprises: a main casing 1, a support sleeve 3, a rotating bracket 4, a first thin pin 7, two tapered roller bearings 10, a cylindrical roller bearing 12, a rubber pad 19, a thick pin 20, and a second thin pin 21.

[0006] Among them, the rotating bracket 4 is cantilever supported on the supporting sleeve 3 by two tapered roller bearings 10 and a cylindrical roller bearing 12; the upper and lower sides of the main frame 1 respectively form a rotating pair with the rotating bracket 4 through the first fine pin shaft 7 and the second fine pin shaft 21, so that the main frame 1 can rotate in the Y direction; a coarse pin shaft 20 is designed on the right side of the main frame 1, and a rubber pad 19 is designed on the surface of the coarse pin shaft 20, allowing the main frame 1 to rotate in the Y direction.

[0007] Furthermore, the bearing positioning bushing 17 is mounted on the rotating bracket 4 and is located between the two tapered roller bearings 10, playing the role of axial positioning and fastening, and the second locking nut and the retaining washer 15 fix and lock the bearing.

[0008] Furthermore, the two tapered roller bearings 10 are provided with a first felt seal 8 and a third felt seal 16 for grease sealing, and the cylindrical roller bearing 12 is provided with a second felt seal 14 for grease sealing.

[0009] Furthermore, the tapered roller bearing 10 and the cylindrical roller bearing 12 are sealed using a lip seal structure.

[0010] Furthermore, the tapered roller bearing 10 is sleeved in the bearing cup 18 , and the cylindrical roller bearing 12 is sleeved in the bearing sleeve 11 .

[0011] Furthermore, the support sleeve 3 is mounted on the bearing cup 18 and the bearing bushing 11, and the bearing end cover 9 and the support sleeve 3 are fixed to the body structure together with the fastening bolt assembly 5. The bearing end cover 9 and the support sleeve 3 axially position the rotating bracket 4 through two tapered roller bearings 10. The support sleeve 3 is provided with a top thread to facilitate the disassembly and installation of the components.

[0012] Furthermore, slots are opened on both sides of the main casing 1, and the wear-resistant bushings 23 are interference-fitted into the casing slots. The first thin pin shaft 7 and the second thin pin shaft 21 are transitionally installed in the wear-resistant bushings 23. The first thin pin shaft 7, the second thin pin shaft 21 and the wear-resistant bushings 23 are all fixed to the main casing 1 by screws, thereby eliminating the sliding wear between the wear-resistant bushings 23 and the first thin pin shaft 7 and the second thin pin shaft 21, and improving the load-bearing capacity of the thin pin shafts.

[0013] Furthermore, the rotating bracket 4 and the first half ferrule 6 are sleeved on the first thin pin 7, the rotating bracket 4 and the second half ferrule 22 are sleeved on the second thin pin 21, and the rotating bracket 4 and the first half ferrule 6 and the second half ferrule 22 are all fastened by the fastening bolt assembly 5.

[0014] Beneficial effects:

[0015] The redundant rotation support device of the present invention increases the service life of the rotation support assembly, improves the reliability and safety of the helicopter, has a simple structure, is light in weight, and is safe and reliable. The present invention is suitable for helicopter actuation mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a redundant rotation support device according to an embodiment of the present invention;

[0017] Figure 2 is a cross-sectional view of a redundant rotation support device according to an embodiment of the present invention;

[0018] Among them, the main box 1, the fixed screw pile assembly 2, the support sleeve 3, the rotating bracket 4, the fastening bolt assembly 5, the first half ferrule 6, the first thin pin shaft 7, the first felt seal 8, the bearing end cover 9, the tapered roller bearing 10, the bearing bushing 11, the cylindrical roller bearing 12, the first locking nut and the stop washer 13, the second felt seal 14, the second locking nut and the stop washer 15, the third felt seal 16, the bearing positioning sleeve 17, the bearing sleeve cup 18, the rubber pad 19, the coarse pin shaft 20, the second thin pin shaft 21, the second half ferrule 22, and the wear-resistant bushing 23. DETAILED DESCRIPTION

[0019] like Figure 1-2The redundant rotation support device includes: a main casing 1, a fixing screw pile assembly 2, a supporting sleeve 3; a rotating bracket 4, a fastening bolt assembly 5, a first half sleeve 6, a first thin pin shaft 7, a first felt seal 8, a bearing end cover 9, a tapered roller bearing 10, a bearing bushing 11, a cylindrical roller bearing 12, a first locking nut and a stop washer 13, a second felt seal 14, a second locking nut and a stop washer 15, a third felt seal 16, a bearing positioning sleeve 17, a bearing sleeve cup 18, a rubber pad 19, a coarse pin shaft 20, a second thin pin shaft 21, a second half sleeve 22 and a wear-resistant bushing 23.

[0020] The rotating bracket 4 is cantilever supported by two tapered roller bearings 10 and a cylindrical roller bearing 12. The rotating bracket 4 can rotate in the X direction. The bearing positioning bushing 17 is installed on the rotating bracket 4 to play the role of axial positioning and fastening. The second locking nut and the locking washer 15 fix and lock the bearing. The installation of the two tapered roller bearings 10 improves the rigidity of the device, and the cylindrical roller bearing 12 extends the position of the supporting point of the supporting device.

[0021] The two tapered roller bearings 10 and the cylindrical roller bearings 12 are both grease lubricated. The two tapered roller bearings 10 are provided with a first felt seal 8 and a third felt seal 16 for grease sealing. The cylindrical roller bearing 12 is provided with a second felt seal 14 for grease sealing. The tapered roller bearings 10 and the cylindrical roller bearings 12 may also be provided with lip seals for sealing.

[0022] The tapered roller bearing 10 is mounted in the bearing cup 18, and the cylindrical roller bearing 12 is mounted in the bearing bushing 11;

[0023] The support sleeve 3 is sleeved on the bearing sleeve cup 18 and the bearing bushing 11. The bearing end cover 9 and the support sleeve 3 are fixed to the body structure together with the fastening bolt assembly 5. The bearing end cover 9 and the support sleeve 3 axially position the rotating bracket 4 through two tapered roller bearings 10. The support sleeve 3 is provided with a top thread to facilitate the disassembly and installation of the assembly.

[0024] Slots are provided on both sides of the main casing 1, and the wear-resistant bushings 23 are installed in the casing slots with interference fit. The first thin pin shaft 7 and the second thin pin shaft 21 are installed in the wear-resistant bushings 23 in a transitional manner. The first thin pin shaft 7, the second thin pin shaft 21 and the wear-resistant bushings 23 are all fixed to the main casing 1 by screws, thereby eliminating the sliding wear between the wear-resistant bushings 23 and the thin pin shafts and improving the load-bearing capacity of the thin pin shafts.

[0025] The rotating bracket 4 and the first half ferrule 6 are sleeved on the first fine pin 7, and the rotating bracket 4 and the second half ferrule 22 are sleeved on the second fine pin 21. The rotating bracket 4 and the first half ferrule 6 and the second half ferrule 22 are all fastened by the fastening bolt assembly 5. The main casing 1 and the rotating bracket 4 form a rotating pair through the first fine pin 7 and the second fine pin 21, so that the main casing 1 can rotate in the X and Y directions. A coarse pin 20 is designed on the right side of the main casing 1. A rubber pad 19 is designed on the surface of the coarse pin 20 to allow the main casing 1 to rotate slightly in the Y direction. The coarse pin 20 and the first fine pin 7 and the second fine pin 21 form a redundancy device. Under normal circumstances, the first fine pin 7 and the second fine pin 21 on both sides bear the Z direction load of the main casing 1. When one of the fine pins breaks, the coarse pin 20 and the other fine pin continue to support the main casing 1, thereby improving the reliability and safety of the supporting device.

[0026] A wear-resistant bushing 23 is installed on the main casing 1, and a wear-resistant coating is sprayed on the inner hole surface of the wear-resistant bushing 23, the outer surfaces of the first fine pin shaft 7 and the second fine pin shaft 21 to reduce the rotational wear or micro-wear of the rotating bracket 4, the first half ferrule 6 and the second half ferrule 22, thereby increasing the service life of the components.

[0027] In this device, the rotating bracket 4 is cantilever supported by two tapered roller bearings 10 and a cylindrical roller bearing 12, and the rotating bracket 4 can rotate in the X direction. The two tapered roller bearings 10 improve the rigidity of the device, and the cylindrical roller bearing 12 extends the position of the supporting point of the supporting device; the main frame 1 and the rotating bracket 4 form a rotating pair through the first fine pin 7 and the second fine pin 21, so that the main frame 1 can rotate in the X and Y directions. A coarse pin 20 is designed on the right side of the main frame 1, and a rubber pad 19 is designed on the surface of the coarse pin 20 to allow the main frame 1 to rotate slightly in the Y direction. The coarse pin 20 and the first fine pin 7 and the second fine pin 21 form a redundancy device. Under normal circumstances, the first fine pins on both sides 7 and the second thin pin shaft 21 bear the Z-direction load of the main casing 1. When one of the thin pin shafts breaks, the thick pin shaft 20 and the other thin pin shaft continue to support the main casing 1, thereby improving the reliability and safety of the support device; the wear-resistant bushing 23 is installed in the casing slot with interference fit, and the wear-resistant bushing 23 is fixed to the main casing 1 by screws, thereby eliminating the sliding wear between the wear-resistant bushing 23 and the thin pin shaft, thereby improving the bearing capacity of the thin pin shaft; the main casing 1 is equipped with a wear-resistant bushing 23, and the inner hole surface of the wear-resistant bushing 23, the outer surface of the first thin pin shaft 7 and the second thin pin shaft 21 are sprayed with a wear-resistant coating, thereby reducing the rotation wear or micro-motion wear of the rotating bracket 4, the first half ferrule 6 and the second half ferrule 22, thereby improving the service life of the components. Its structure is simple, compact and practical, thereby improving the rigidity of the rotating support device, having a two-way rotational degree of freedom, improving the service life of the rotating support device, and improving the reliability and safety of the rotating support device. The present invention is suitable for a helicopter tilting actuation system.

[0028] The rotating bracket 4 of the present invention is cantilever supported by two tapered roller bearings 10 and a cylindrical roller bearing 12. The rotating bracket 4 can rotate in the X direction. The two tapered roller bearings 10 improve the rigidity of the device, and the cylindrical roller bearing 12 extends the position of the supporting point of the supporting device; the main casing 1 and the rotating bracket 4 form a rotating pair through the first fine pin shaft 7 and the second fine pin shaft 21, so that the main casing 1 can rotate in the Y direction. A coarse pin shaft 20 is designed on the right side of the main casing 1. The surface of the coarse pin shaft 20 is designed with a rubber pad 19, allowing the main casing 1 to rotate slightly in the Y direction. The coarse pin shaft 20 and the first fine pin shaft 7 and the second fine pin shaft 21 form a redundancy device; under normal circumstances, the fine pin shafts on both sides bear the Z direction load of the main casing. When one of the fine pin shafts breaks, the coarse pin shaft and the other fine pin shaft continue to support the main casing, thereby improving the reliability and safety of the supporting device; the wear-resistant bushing 23 is interference-fitted on the casing In the slot, the wear-resistant bushing 23 is fixed to the main casing 1 by screws, eliminating the sliding wear between the wear-resistant bushing 23 and the fine pin shaft, and improving the load-bearing capacity of the fine pin shaft; the two tapered roller bearings 10 and the cylindrical roller bearings 12 are all greased, and both ends of the bearings are designed with felt seals, and lip seals can also be set for sealing; the support sleeve 3 is sleeved on the bearing sleeve cup 18 and the bearing bushing 11, and the bearing end cover 9 and the support sleeve 3 are fixed to the body structure together with the fastening bolt assembly 5, and the bearing end cover 9 and the support sleeve 3 axially position the rotating bracket 4 through two tapered roller bearings 10; the support sleeve 3 is provided with a top thread, which is convenient for the disassembly and installation of the assembly; the inner hole surface of the wear-resistant bushing 23, the outer surface of the first fine pin shaft 7 and the second fine pin shaft 21 are sprayed with a wear-resistant coating, reducing the rotational wear or micro-motion wear of the rotating bracket 4 and the first half ferrule 6 and the second half ferrule 22, and improving the service life of the assembly. The present invention is suitable for a helicopter tilting actuation system.

Claims

1. A redundant rotation support device, characterized in that: include: Main frame (1), support sleeve (3), rotating bracket (4), first thin pin (7), two tapered roller bearings (10), cylindrical roller bearing (12), rubber pad (19), thick pin (20), second thin pin (21), The rotating bracket (4) is cantilever-supported on a supporting sleeve (3) by two tapered roller bearings (10) and a cylindrical roller bearing (12); the upper and lower sides of the main frame (1) respectively form a rotating pair with the rotating bracket (4) through a first thin pin shaft (7) and a second thin pin shaft (21), so that the main frame (1) can rotate in the Y direction; a thick pin shaft (20) is designed on the right side of the main frame (1), and a rubber pad (19) is designed on the surface of the thick pin shaft (20), so that the main frame (1) can rotate in the Y direction.

2. The redundant rotation support device according to claim 1, characterized in that: The bearing positioning bushing (17) is mounted on the rotating bracket (4) and is located between the two tapered roller bearings (10), and plays the role of axial positioning and fastening. The second locking nut and the stop washer (15) fix and lock the bearing.

3. The redundant rotation support device according to claim 1, characterized in that: The two tapered roller bearings (10) are provided with a first felt seal (8) and a third felt seal (16) for grease sealing, and the cylindrical roller bearing (12) is provided with a second felt seal (14) for grease sealing.

4. The redundant rotation support device according to claim 1, characterized in that: The tapered roller bearing (10) and the cylindrical roller bearing (12) are sealed using a lip seal structure.

5. The redundant rotation support device according to claim 1, characterized in that: The tapered roller bearing (10) is sleeved in the bearing sleeve cup (18), and the cylindrical roller bearing (12) is sleeved in the bearing bushing (11).

6. The redundant rotation support device according to claim 1, characterized in that: The support sleeve (3) is sleeved on the bearing sleeve cup (18) and the bearing bushing (11); the bearing end cover (9) and the support sleeve (3) are fixed to the machine body structure by a fastening bolt assembly (5); the bearing end cover (9) and the support sleeve (3) are used to axially position the rotating bracket (4) through two tapered roller bearings (10); and a top thread is provided on the support sleeve (3) to facilitate assembly disassembly and installation.

7. The redundant rotation support device according to claim 1, characterized in that: Slots are provided on both sides of the main casing (1), and wear-resistant bushings (23) are installed in the casing slots with interference fit. The first thin pin shaft (7) and the second thin pin shaft (21) are installed in the wear-resistant bushings (23) in a transitional manner. The first thin pin shaft (7), the second thin pin shaft (21) and the wear-resistant bushings (23) are all fixed to the main casing (1) by screws, thereby eliminating sliding wear between the wear-resistant bushings (23) and the first thin pin shaft (7) and the second thin pin shaft (21), and improving the load-bearing capacity of the thin pin shafts.

8. The redundant rotation support device according to claim 1, characterized in that: The rotating bracket (4) and the first half ferrule (6) are sleeved on the first thin pin shaft (7), the rotating bracket (4) and the second half ferrule (22) are sleeved on the second thin pin shaft (21), and the rotating bracket (4) and the first half ferrule (6) and the second half ferrule (22) are all fastened by a fastening bolt assembly (5).

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