Piston rod assembly assembling and positioning device for repairing reverse thrust actuator cylinder

Abstract

The utility model discloses a piston rod assembly assembling and positioning device for repairing a reverse thrust actuator cylinder, which comprises a piston rod assembly, a piston rod positioning device and a lead screw positioning device, a piston rod centering sleeve of the piston rod positioning device is sleeved outside the lower end of a piston rod of the piston rod assembly, and a piston rod positioning sleeve is further sleeved in the bottom of the piston rod centering sleeve. A piston rod locking bolt is screwed in the piston rod positioning sleeve; a locking nut is screwed on a threaded part outside the piston rod centering sleeve; a positioning sliding sleeve of the lead screw positioning device is sleeved outside the upper end of a lead screw assembly positioning sleeve, and the lower end of the positioning sliding sleeve is pressed on a circular bead of the lead screw assembly positioning sleeve. Compared with the prior art, the piston rod positioning device has the advantages that a piston rod locking bolt is connected with a threaded positioning hole in the bottom of a piston rod, so that the position of the piston rod is fixed; a positioning sliding sleeve, a lead screw assembly positioning sleeve and the like are installed at the upper end of the actuator cylinder shell, and a locking nut is rotated to move upwards, so that the actuator cylinder shell is arranged outside a gap adjusting gasket of the piston rod assembly in a sleeving mode.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft maintenance, in particular to a piston rod assembly positioning 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 play a deceleration role during the landing and taxiing phase of the aircraft. When assembling the thrust reverser actuator after repair, the piston rod assembly needs to be installed into the actuator housing. During installation, the gap adjustment gasket on the piston rod assembly needs to be inserted into the actuator housing. However, since the gap adjustment gasket is tightly matched with the inner wall of the actuator housing, it is very difficult to install. The position of the gap adjustment gasket needs to be adjusted to the center vertical and a downward thrust is applied to ensure that the piston rod assembly and the gap adjustment gasket are installed in place to avoid damage to the piston rod assembly during installation. However, the center vertical adjustment is time-consuming and labor-intensive, which has a certain impact on the assembly efficiency. For this reason, we propose a piston rod assembly assembly positioning device for repairing thrust reversers. Utility Model Content

[0003] The utility model aims to provide a piston rod assembly locating device for repairing a reverse thrust actuator to solve the problems raised in the above-mentioned background technology.

[0004] The camshaft is an axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially axially

[0005] The screw positioning device includes a positioning sleeve, which is sleeved on the outside of the upper end of the screw assembly positioning sleeve, and the lower end of the positioning sleeve is pressed on the shoulder of the screw assembly positioning sleeve. The outer surface of the lower end of the screw assembly positioning sleeve is fitted with the inner surface of the upper end of the actuator cylinder housing. A clamping nut is provided on the outer sleeve of the lower end of the positioning sleeve, and the external thread of the clamping nut is connected to the internal thread of the upper end of the actuator cylinder housing. The bearing positioning groove in the screw assembly positioning sleeve is sleeved on the outside of the bearing of the screw assembly, and the screw assembly positioning groove in the screw assembly positioning sleeve is sleeved on the outside of the gap adjustment gasket.

[0006] Preferably, two threaded through holes are symmetrically provided at the upper end of the positioning sleeve, and a slide groove is vertically provided on the screw assembly positioning sleeve located in the threaded through hole, and the width of the slide groove is the same as the diameter of the threaded through hole. The sleeve positioning bolt threaded in the threaded through hole is inserted into the slide groove, and the positioning bolt enables the positioning sleeve to slide up and down only outside the screw assembly positioning sleeve.

[0007] Preferably, a nylon pad is provided between the lower end of the piston rod positioning sleeve and the bolt head of the piston rod locking bolt, and the nylon pad serves to buffer pressure.

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

[0009] When assembling the piston rod assembly, first fix the piston rod of the assembled piston rod assembly through the piston rod positioning device, connect the piston rod locking bolt with the threaded positioning hole at the bottom of the piston rod, and connect the piston rod positioning sleeve with the piston rod centering sleeve through the positioning bolt to fix the position of the piston rod;

[0010] After the locking nut is installed outside the piston rod centering sleeve, the lower end of the actuator housing is supported, and the positioning sleeve, the screw assembly positioning sleeve and the clamping nut are installed outside the screw assembly. The clamping nut is connected to the internal thread of the upper end of the actuator housing to achieve the connection between the positioning sleeve, the screw assembly positioning sleeve and the clamping nut and the actuator housing, and the positioning sleeve and the screw assembly positioning sleeve are compressed to make the lower end of the screw assembly positioning sleeve contact the shoulder in the actuator housing, and the gap adjustment gasket is sleeved inside;

[0011] Finally, turn the locking nut to move upward, push the actuator housing, positioning sleeve, screw assembly positioning sleeve, etc. to move upward relative to the piston rod assembly, until the gap adjustment gasket of the piston rod assembly is inserted into the installation position of the actuator housing, and the assembly is completed;

[0012] The utility model makes the installation of the piston rod assembly convenient and fast, completes the assembly while ensuring that the piston rod assembly is always in a centered vertical position, avoids extrusion damage to the gap adjustment gasket during the installation process, and improves the assembly quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural sectional view of the piston rod assembly of the utility model;

[0014] Figure 2 This is a structural cross-sectional view of the piston rod positioning device of the utility model in the installed state;

[0015] Figure 3 It is a structural cross-sectional view of the piston rod positioning device and the lead screw positioning device of the utility model in the installed state;

[0016] Figure 4 This is a structural sectional view of the piston rod positioning device of the utility model;

[0017] Figure 5 It is a structural sectional view of the screw positioning device of the utility model.

[0018] In the figure: 1. piston rod assembly, 11. piston rod, 111. threaded positioning hole, 12. screw assembly, 121. bearing, 122. gap adjustment gasket, 13. actuator housing, 2. piston rod positioning device, 21. piston rod centering sleeve, 211. first positioning hole, 22. piston rod positioning sleeve, 221. second positioning hole, 23. nylon pad, 24. piston rod locking bolt, 25. positioning bolt, 26. positioning locking nut, 3. screw positioning device, 31. positioning sleeve, 311. threaded through hole, 32. screw assembly positioning sleeve, 321. slide groove, 33. sleeve positioning bolt, 34. clamping nut, 35. bearing positioning groove, 36. screw assembly positioning groove. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-5A piston rod assembly positioning device for repairing a reverse thrust actuator comprises a piston rod assembly 1, a piston rod positioning device 2 and a lead screw positioning device 3, wherein the piston rod positioning device 2 comprises a piston rod centering sleeve 21, wherein the piston rod centering sleeve 21 is sleeved on the lower end of the piston rod 11 of the piston rod assembly 1, and a piston rod positioning sleeve 22 is sleeved on the bottom of the piston rod centering sleeve 21, wherein the upper end of the piston rod positioning sleeve 22 abuts against the lower end of the piston rod 11, and a piston rod locking bolt 24 is screwed from bottom to top in the piston rod positioning sleeve 22, wherein the upper end of the piston rod locking bolt 24 is screwed in the threaded positioning hole 111 at the bottom of the piston rod 11, and the piston rod positioning sleeve A nylon pad 23 is arranged between the lower end of 22 and the bolt head of the piston rod locking bolt 24, and the nylon pad 23 plays the role of buffering pressure; a second positioning hole 221 is opened on the side of the piston rod positioning sleeve 22, and a first positioning hole 211 is opened on the piston rod centering sleeve 21 outside the second positioning hole 221, and the first positioning hole 211 is connected with the second positioning hole 221 through a positioning bolt 25, and the positioning bolt 25 passes through the first positioning hole 211 and is screwed into the first positioning hole 211, and a locking nut 26 is screwed on the threaded portion outside the piston rod centering sleeve 21, and the locking nut 26 forms a support for the lower end of the actuator housing 13 of the piston rod assembly 1;

[0021] The screw positioning device 3 includes a positioning sleeve 31, and the positioning sleeve 31 is sleeved on the upper end of the screw assembly positioning sleeve 32. The upper end of the positioning sleeve 31 is symmetrically provided with two threaded through holes 311, and a slide groove 321 is vertically provided on the screw assembly positioning sleeve 32 located in the threaded through holes 311. The width of the slide groove 321 is the same as the diameter of the threaded through hole 311. The sleeve positioning bolt 33 threaded in the threaded through hole 311 is inserted into the slide groove 321. The positioning bolt 33 enables the positioning sleeve 31 to slide up and down outside the screw assembly positioning sleeve 32; the lower end of the positioning sleeve 31 is pressed on the shoulder of the screw assembly positioning sleeve 32, and the outer surface of the lower end of the screw assembly positioning sleeve 32 is made of The upper end of the cylinder housing 13 fits in place, and a clamping nut 34 is provided on the lower end of the positioning sleeve 31. The external thread of the clamping nut 34 is connected to the internal thread of the upper end of the cylinder housing 13, so as to realize the connection between the positioning sleeve 31, the screw assembly positioning sleeve 32 and the clamping nut 34 and the cylinder housing 13, and the positioning sleeve 31 and the screw assembly positioning sleeve 32 are pressed tightly, so that the lower end of the screw assembly positioning sleeve 32 contacts the shoulder in the cylinder housing 13, and the gap adjustment gasket 122 is sleeved inside; the bearing positioning groove 35 in the screw assembly positioning sleeve 32 is sleeved outside the bearing 121 of the screw assembly 12, and the screw assembly positioning groove 36 in the screw assembly positioning sleeve 32 is sleeved outside the gap adjustment gasket 122.

[0022] Working principle: When assembling the piston rod assembly 1, first fix the piston rod 11 of the assembled piston rod assembly 1 through the piston rod positioning device 2, connect the piston rod locking bolt 24 with the threaded positioning hole 111 at the bottom of the piston rod 11, and connect the piston rod positioning sleeve 22 with the piston rod centering sleeve 21 through the positioning bolt 25 to achieve the position fixation of the piston rod 11;

[0023] Install the locking nut 26 outside the piston rod centering sleeve 21, then install the positioning sleeve 31, the screw assembly positioning sleeve 32 and the clamping nut 34 outside the screw assembly 12, connect the clamping nut 34 to the internal thread on the upper end of the actuator housing 13, and tighten the positioning sleeve 31 and the screw assembly positioning sleeve 32;

[0024] Finally, rotate the locking nut 26 to move upward, pushing the actuator housing 13, the positioning sleeve 31, the screw assembly positioning sleeve 32, etc. to move upward relative to the piston rod assembly 1 until the adjustment gasket 122 of the piston rod assembly 1 is inserted into the installation position of the actuator housing 13 to complete the assembly.

[0025] 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.

[0026] 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 piston rod assembly positioning device for repairing a reverse thrust actuator, comprising a piston rod assembly (1), a piston rod positioning device (2) and a lead screw positioning device (3), characterized in that: The piston rod positioning device (2) comprises a piston rod centering sleeve (21), the piston rod centering sleeve (21) is sleeved on the lower end of the piston rod (11) of the piston rod assembly (1), a piston rod positioning sleeve (22) is sleeved on the bottom of the piston rod centering sleeve (21), the upper end of the piston rod positioning sleeve (22) is against the lower end of the piston rod (11), a piston rod locking bolt (24) is screwed from bottom to top in the piston rod positioning sleeve (22), and the upper end of the piston rod locking bolt (24) is screwed to the threaded fixing bolt at the bottom of the piston rod (11). A second positioning hole (221) is provided on the side of the piston rod positioning sleeve (22) in the positioning hole (111), a first positioning hole (211) is provided on the piston rod centering sleeve (21) outside the second positioning hole (221), the first positioning hole (211) is connected to the second positioning hole (221) via a positioning bolt (25), a locking nut (26) is screwed on the threaded portion outside the piston rod centering sleeve (21), and the locking nut (26) supports the lower end of the actuator housing (13) of the piston rod assembly (1); The screw positioning device (3) comprises a positioning sleeve (31), wherein the positioning sleeve (31) is sleeved on the outer side of the upper end of the screw assembly positioning sleeve (32), the lower end of the positioning sleeve (31) is pressed on the shoulder of the screw assembly positioning sleeve (32), the outer surface of the lower end of the screw assembly positioning sleeve (32) is fitted with the inner side of the upper end of the actuator cylinder housing (13), the outer sleeve of the lower end of the positioning sleeve (31) is provided with a clamping nut (34), the outer thread of the clamping nut (34) is connected with the inner thread of the upper end of the actuator cylinder housing (13), the bearing positioning groove (35) in the screw assembly positioning sleeve (32) is sleeved on the outer side of the bearing (121) of the screw assembly (12), and the screw assembly positioning groove (36) in the screw assembly positioning sleeve (32) is sleeved on the outer side of the gap adjustment gasket (122).

2. The piston rod assembly assembly positioning device for repairing a reverse thrust actuator according to claim 1, characterized in that: Two threaded through holes (311) are symmetrically formed at the upper end of the positioning sleeve (31), a slide groove (321) is vertically formed on the screw assembly positioning sleeve (32) located in the threaded through hole (311), and a sleeve positioning bolt (33) threaded in the threaded through hole (311) is inserted into the slide groove (321).

3. The piston rod assembly positioning device for repairing a reverse thrust actuator according to claim 1, characterized in that: A nylon pad (23) is arranged between the lower end of the piston rod positioning sleeve (22) and the bolt head of the piston rod locking bolt (24).

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