Locking nut mounting device for repairing reverse thrust actuator cylinder

Abstract

The locking nut installation device comprises an actuator cylinder assembly and a fixing assembly, a first positioning sleeve of the fixing assembly is arranged outside the upper ends of a safety ring, a bearing and a worm gear in a sleeved mode from top to bottom, and positioning bolts are connected into four first threaded positioning holes symmetrically formed in the side face of the upper end of the first positioning sleeve in a threaded mode. A fixing sleeve is connected to the step face of the first positioning sleeve, a second positioning sleeve is arranged at the lower end of the first positioning sleeve, and key teeth arranged in the second positioning sleeve are matched with key grooves outside the worm gear. Compared with the prior art, the utility model has the beneficial effects that the worm gear is connected with the second positioning sleeve through the matching of the key teeth and the key grooves, and at the moment, the actuator cylinder assembly can be fixed by fixing the fixing assembly, so that the locking nut can be conveniently screwed down; and meanwhile, external force applied to the safety ring when the locking nut rotates can be counteracted through pressure applied by the four positioning bolts, the safety ring is prevented from being deformed and damaged, and the repairing quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft component repair, in particular to a locking nut installation device for repairing a reverse thrust actuator. Background Art

[0002] The thrust reverser actuator is installed on the engine thrust reverser system. Its function is to move the thrust reverser cover and provide feedback data to the engine electronic control system. Each thrust reverser system contains two thrust reverser actuators with LVDT feedback on the upper part, which are mutually restrained with the locking actuator on the lower part of the thrust reverser system to achieve synchronization between the actuators.

[0003] When repairing the reverse thrust actuator, multiple steps such as disassembly, repair, assembly, and testing are required. The upper ends of the worm wheel and worm of the reverse thrust actuator are provided with bearings, and a safety ring is sleeved on the worm outside the upper end of the bearing. The safety ring at the lower end of the safety ring is inserted into the safety groove on the worm for positioning, and a clearance adjustment gasket is provided at the bottom of the safety ring, and a claw-type stop sleeve is provided at the upper end of the worm. The positions of the clearance adjustment gasket and the claw-type stop sleeve are fixed by a locking nut connected by threads outside the upper end of the worm. Finally, the sensing rod group is inserted into the worm. During installation, since the actuator assembly is a rotary type as a whole, it is not easy to fix. It is very difficult to tighten the locking nut and apply torque, and the locking nut is also prone to deformation and damage of the safety ring when tightened, affecting the repair quality. For this reason, we propose a locking nut installation device for repairing a reverse thrust actuator. Utility Model Content

[0004] The utility model aims to provide a locking nut installation device for repairing a reverse thrust actuator to solve the problems raised in the above-mentioned background technology.

[0005] A locking nut installation device for repairing a reverse thrust actuator cylinder comprises an actuator cylinder assembly and a fixing assembly, wherein the actuator cylinder assembly comprises a worm wheel, a worm bearing, a safety ring, a clearance adjustment gasket, a claw-type stop sleeve, a locking nut, and a sensing rod group that are matched and connected. A safety ring is sleeved on the worm outside the upper end of the bearing, and the safety ring at the lower end of the safety ring is inserted into the safety groove on the worm for positioning. A clearance adjustment gasket is arranged at the bottom of the safety ring, and a claw-type stop sleeve is arranged at the upper end of the worm. The positions of the clearance adjustment gasket and the claw-type stop sleeve are fixed by a locking nut connected by threads outside the upper end of the worm, and the outer surface of the locking nut is a flower groove type, and the sensing rod group is inserted into the worm; the first positioning sleeve of the fixing assembly is sleeved on the outside of the upper end of the safety ring, the bearing and the worm wheel from top to bottom, and the upper end side surface of the first positioning sleeve is symmetrically provided with four first threaded positioning sleeves Positioning hole, a positioning bolt is screwed in the first threaded positioning hole from the outside to the inside, the front end of the positioning bolt is pressed on the outer surface of the safety ring, two second threaded positioning holes are provided on the stepped surface of the first positioning sleeve, a fixing sleeve is provided on the upper end of the stepped surface of the first positioning sleeve, a first connecting through hole is provided on the fixing sleeve, the first connecting bolt arranged on the fixing sleeve passes through the first connecting through hole and is screwed in the second threaded positioning hole; a second positioning sleeve is provided at the lower end of the first positioning sleeve, the second positioning sleeve is sleeved on the outside of the lower end of the worm gear, a key tooth is provided in the second positioning sleeve, the key tooth cooperates with the keyway outside the worm gear, a second connecting through hole is provided on the second positioning sleeve, the second connecting bolt on the lower surface of the second positioning sleeve passes through the second connecting through hole from bottom to top and is screwed in the second threaded positioning hole.

[0006] Preferably, a third threaded positioning hole is opened on the side surface of the lower end of the second positioning sleeve, and a limiting bolt is screwed into the third threaded positioning hole from the outside to the inside. The screw rod of the limiting bolt is tightly attached to the lower surface of the worm wheel. The limiting bolt can limit the up and down displacement of the fixing assembly on the actuator assembly.

[0007] Preferably, a handle is connected to the outer side of the fixing sleeve, and the handle facilitates the use of the fixing assembly.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] When the safety ring, locking nut and other components of the actuator are pushed back during installation, the first locating sleeve, the fixing sleeve and the second locating sleeve of the fixing assembly are connected in sequence through the first connecting bolt and the second connecting bolt, and the connection between the worm gear and the second locating sleeve is achieved through the cooperation of the key teeth and the keyway. At this time, the fixing of the actuator assembly can be achieved by fixing the fixing assembly, which makes it easier to tighten the locking nut, making the assembly process more convenient and improving work efficiency. At the same time, the pressure exerted by the four positioning bolts can offset the external force on the safety ring when the locking nut rotates, thereby avoiding deformation and damage of the safety ring and ensuring the quality of the repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a parts diagram of the actuator assembly of the utility model;

[0011] Figure 2 It is an assembly diagram of the actuator assembly of the utility model;

[0012] Figure 3 It is the assembly drawing for the use of the fixing components of the utility model;

[0013] Figure 4 It is a bottom view of the fixing assembly of the utility model;

[0014] Figure 5 It is a top view of the fixing assembly of the utility model.

[0015] In the figure: 1. actuator cylinder assembly, 11. worm gear, 111. keyway, 12. worm, 121. safety groove, 13. bearing, 14. safety ring, 141. safety key, 15. gap adjustment gasket, 16. claw-type stop sleeve, 17. locking nut, 18. sensing rod group, 2. fixing assembly, 21. first positioning sleeve, 211. first threaded positioning hole, 212. second threaded positioning hole, 22. positioning bolt, 23. fixing sleeve, 231. first connecting through hole, 232. handle, 24. first connecting bolt, 25. second positioning sleeve, 251. second connecting through hole, 252. third threaded positioning hole, 253. key tooth, 26. second connecting bolt, 27. limit bolt. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-5A locking nut installation device for repairing a reverse thrust actuator comprises an actuator assembly 1 and a fixing assembly 2, wherein the actuator assembly 1 comprises a worm wheel 11, a worm 12 bearing 13, a safety ring 14, a gap adjustment gasket 15, a claw-type stop sleeve 16, a locking nut 17, and a sensing rod group 18, wherein a safety ring 14 is sleeved on the worm 12 outside the upper end of the bearing 13, and the safety ring 14 at the lower end of the safety ring 14 is inserted into a safety groove 121 on the worm 12 for positioning, and a gap adjustment gasket 15 is arranged at the bottom of the safety ring 14, and a claw-type stop sleeve 16 is arranged at the upper end of the worm 12, and the gap adjustment gasket 15 and the claw-type stop sleeve 16 are fixed to each other by a locking nut 17 connected by a thread outside the upper end of the worm 12. The position of the movable sleeve 16 is fixed, the outer surface of the locking nut 17 is a flower groove type, and the sensing rod group 18 is inserted into the worm 12; the first positioning sleeve 21 of the fixing assembly 2 is sleeved from top to bottom on the outer side of the safety ring 14, the bearing 13 and the upper end of the worm wheel 11, and the upper end side of the first positioning sleeve 21 is symmetrically provided with four first threaded positioning holes 211, and the first threaded positioning holes 211 are screwed with positioning bolts 22 from the outside to the inside, and the front end of the positioning bolts 22 is pressed on the outer surface of the safety ring 14. The pressure exerted by the four positioning bolts 22 can offset the external force on the safety ring 14 when the locking nut 17 rotates, so as to avoid deformation and damage of the safety ring 14. The step of the first positioning sleeve 21 Two second threaded positioning holes 212 are provided on the stepped surface, a fixing sleeve 23 is sleeved on the upper end of the stepped surface of the first positioning sleeve 21, and a handle 232 is also connected to the outer side of the fixing sleeve 23, and the handle 232 facilitates the use of the fixing component 2, and a first connecting through hole 231 is provided on the fixing sleeve 23, and a first connecting bolt 24 provided on the fixing sleeve 23 passes through the first connecting through hole 231 and is screwed into the second threaded positioning hole 212; a second positioning sleeve 25 is provided at the lower end of the first positioning sleeve 21, and the second positioning sleeve 25 is sleeved on the outer side of the lower end of the worm gear 11, and a key tooth 253 is provided in the second positioning sleeve 25, and the key tooth 253 is connected to the key groove outside the worm gear 11 111, the connection between the worm wheel 11 and the second positioning sleeve 25 is realized by the cooperation of the key tooth 253 and the keyway 111, a second connecting through hole 251 is opened on the second positioning sleeve 25, and the second connecting bolt 26 on the lower surface of the second positioning sleeve 25 passes through the second connecting through hole 251 from bottom to top and is screwed into the second threaded positioning hole 212; a third threaded positioning hole 252 is opened on the lower end side of the second positioning sleeve 25, and a limiting bolt 27 is screwed into the third threaded positioning hole 252 from outside to inside, and the screw rod of the limiting bolt 27 is tightly attached to the lower surface of the worm wheel 11, and the limiting bolt 27 can limit the up and down displacement of the fixing component 2 on the actuator assembly 1.

[0018] Working principle: The first positioning sleeve 21, the fixing sleeve 23 and the second positioning sleeve 25 of the fixing assembly 2 are connected in sequence through the first connecting bolt 24 and the second connecting bolt 26, and the connection between the worm gear 11 and the second positioning sleeve 25 is achieved through the cooperation between the key tooth 253 and the key groove 111. The fixing of the actuator assembly 1 is achieved by fixing and installing the fixing assembly 2; at the same time, the pressure exerted by the four positioning bolts 22 offsets the external force on the safety ring 14 when the locking nut 17 rotates, thereby avoiding deformation and damage of the safety ring 14.

[0019] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0020] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A locking nut installation device for repairing a reverse thrust actuator, comprising an actuator assembly (1) and a fixing assembly (2), characterized in that: The actuator cylinder assembly (1) comprises a worm wheel (11), a worm (12), a bearing (13), a safety ring (14), a clearance adjustment gasket (15), a claw-type stop sleeve (16), a locking nut (17), and a sensing rod group (18) that are matched and connected; the first positioning sleeve (21) of the fixing assembly (2) is sleeved from top to bottom on the outer side of the upper end of the safety ring (14), the bearing (13) and the worm wheel (11); four first threaded positioning holes (211) are symmetrically provided on the upper side of the first positioning sleeve (21); a positioning bolt (22) is screwed from the outside to the inside in the first threaded positioning hole (211); the front end of the positioning bolt (22) is pressed on the outer surface of the safety ring (14); two second threaded positioning holes (212) are provided on the stepped surface of the first positioning sleeve (21); A fixing sleeve (23) is sleeved on the upper end of the stepped surface of the positioning sleeve (21), and a first connecting through hole (231) is provided on the fixing sleeve (23). A first connecting bolt (24) provided on the fixing sleeve (23) passes through the first connecting through hole (231) and is screwed into the second threaded positioning hole (212); a second positioning sleeve (25) is provided on the lower end of the first positioning sleeve (21), and a key tooth (253) is provided in the second positioning sleeve (25), and the key tooth (253) cooperates with a key groove (111) outside the worm gear (11), and a second connecting through hole (251) is provided on the second positioning sleeve (25), and a second connecting bolt (26) on the lower surface of the second positioning sleeve (25) passes through the second connecting through hole (251) from bottom to top and is screwed into the second threaded positioning hole (212).

2. A locking nut installation device for repairing a reverse thrust actuator according to claim 1, characterized in that: A third threaded positioning hole (252) is provided on the side surface of the lower end of the second positioning sleeve (25), and a limiting bolt (27) is threadedly connected from the outside to the inside of the third threaded positioning hole (252), and the screw rod of the limiting bolt (27) is in close contact with the lower surface of the worm wheel (11).

3. The locking nut installation device for repairing a reverse thrust actuator according to claim 1, characterized in that: The outer side of the fixing sleeve (23) is also connected to a handle (232).

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