Special tool for repairing A320 airplane kitchen

Abstract

A special tool for A320 aircraft kitchen repair relates to the technical field of aircraft maintenance tools, and is characterized in that a mounting bolt is inserted into a mounting bushing, and a threaded fastener is screwed on the mounting bolt from a square hole of a fixing block to realize axial connection of the mounting bolt and the mounting bushing; then, the mounting bolt and the drawing bolt are axially connected through the connecting mechanism, the hydraulic cylinder is manually operated to act, and the piston rod of the hydraulic cylinder retracts inwards, so that the drawing bolt is pulled to move outwards, the mounting bush is pulled outwards from the mounting hole through the mounting bolt, and the corroded mounting bush is pulled out of the mounting hole quickly and conveniently; the working efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft maintenance tools, in particular to a special tool for repairing an A320 aircraft kitchen. Background Art

[0002] According to the requirements of the aircraft manufacturer Airbus, the work surface of the cabin kitchen needs to be inspected during the scheduled inspection and maintenance of the aircraft. Because the kitchen area is often wet and is in a humid environment for a long time, it is particularly prone to corrosion and damage. Therefore, the repair frequency of the kitchen work surface of this model is relatively high.

[0003] When repairing damaged parts, the kitchen structure needs to be disassembled, and the rotating handle of the kitchen dining cart needs to be removed during the disassembly process. The installation bushing inside the rotating handle connects the pressure strip, the kitchen frame and the fixed block of the honeycomb structure. The bushing is long, and the matching accuracy and coaxiality requirements of each connecting part are very high. It is difficult to remove after corrosion.

[0004] Airbus has not designed a special removal tool for this part. If it is sent for repair, the cycle will be very long, which will also increase the customer's maintenance costs and affect the aircraft's maintenance cycle. In order not to affect the aircraft's maintenance cycle and save maintenance costs, this tool is designed and developed for the removal of the rotating handle of the galley stop device.

[0005] At present, maintenance personnel generally use pulling pliers to remove the installation bushing, which has great disadvantages. First, it is noisy, has high operating risks, and is easy to cause damage to the kitchen structure. Second, the tool needs to be operated manually, which is time-consuming and labor-intensive, with high work intensity and low efficiency. Moreover, it is often difficult to remove. Summary of the invention

[0006] In order to overcome the deficiencies of the above technologies, the utility model provides a special tool for repairing the galley of A320 aircraft, which can reduce labor intensity and improve work efficiency.

[0007] The technical solution adopted by the utility model to overcome the technical problems is:

[0008] A special tool for repairing the galley of an A320 aircraft, comprising a galley structure frame and a fixing block located in the galley structure frame, wherein the galley structure frame and the fixing block are both provided with mounting holes, and mounting bushings are inserted into the two mounting holes, and the tool is characterized in that it also comprises:

[0009] A mounting bolt, the head end of which is connected to the tail end of the mounting bushing through a threaded fastener;

[0010] The dismantling support sleeve is in a cylindrical structure, and the mounting bolt is inserted into the inner hole of the dismantling support sleeve by sliding along the axial direction, and the inner side end of the dismantling support sleeve contacts the outer side end surface of the kitchen structure frame;

[0011] A pull bolt, the tail end of which is coaxially connected to the hexagonal head of the mounting bolt head end through a connecting mechanism;

[0012] A manual hydraulic cylinder, wherein a screw hole is arranged at the head end of the piston rod, the head end of the pull bolt is screwed into the screw hole at the head end of the piston rod, and the pull bolt is coaxially connected with the piston rod of the manual hydraulic cylinder;

[0013] And a plurality of support sleeves, the support sleeves are sleeved on the pull bolts, the rear end face of the last support sleeve contacts the front end face of the removal support sleeve, and the front end face of the frontmost support sleeve contacts the rear end face of the manual hydraulic cylinder.

[0014] Furthermore, the above-mentioned threaded fastener includes a removal bushing inserted into the mounting hole and sleeved on the mounting bolt, and a nut screwed on the mounting bolt, the front end face of the nut contacts the rear end face of the removal bushing, and the front end face of the removal bushing contacts the rear end face of the mounting bushing.

[0015] For the convenience of installation, the removal bushing is composed of two semicircular arc bushings.

[0016] Furthermore, the above-mentioned connecting mechanism includes a slot I arranged at the tail end of the pull-out bolt and a slot II located at the rear end of the slot I, the slot I matches the size of the hexagonal head, and the slot II matches the outer diameter of the mounting bolt. When the hexagonal head is inserted into the slot I and the bolt is inserted into the slot II, the pull-out bolt and the mounting bolt are coaxial.

[0017] In order to facilitate operation, the utility model further comprises a handle fixed on the manual hydraulic cylinder, wherein the axis of the handle is perpendicular to the axis of the manual hydraulic cylinder.

[0018] In order to facilitate installation, the support sleeve is in a C-shaped structure, and is provided with an opening along the axial direction, and the width of the opening is greater than the outer diameter of the pull bolt.

[0019] The beneficial effects of the utility model are as follows: the mounting bolt is inserted into the mounting bushing, and the threaded fastener is screwed onto the mounting bolt from the square hole of the fixing block to realize the axial connection between the mounting bolt and the mounting bushing; then the mounting bolt and the pull-out bolt are axially connected through the connecting mechanism; the manual hydraulic cylinder is actuated, and its piston rod is retracted inwardly, thereby pulling the pull-out bolt to move outwardly, and then the mounting bushing is pulled outward from the mounting hole by using the mounting bolt, so that the corroded mounting bushing can be quickly and conveniently pulled out of the mounting hole, thereby improving work efficiency and reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 for Figure 1 AA section structure diagram;

[0022] Figure 3 It is an exploded view of the three-dimensional structure of the utility model;

[0023] Figure 4 It is a three-dimensional structural diagram of the pull bolt of the utility model;

[0024] Figure 5 It is a three-dimensional structural diagram of the mounting bolt of the utility model;

[0025] Figure 6 It is a three-dimensional structural diagram of the arc-shaped bushing part of the utility model;

[0026] In the figure, 1. kitchen structure frame 2. installation bushing 3. manual hydraulic cylinder 4. handle 5. pull bolt 6. support sleeve 7. removal of support sleeve 8. installation bolt 9. square hole 10. installation hole 11. fixing block 12. nut 13. removal of bushing 51. slot I 52. slot II 81. hexagonal head 131. arc bushing. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 To Attachment Figure 6 The utility model is further described.

[0028] A special tool for repairing the kitchen of an A320 aircraft, comprising a kitchen structure frame 1 and a fixing block 11 located in the kitchen structure frame 1, wherein both the kitchen structure frame 1 and the fixing block 11 are provided with mounting holes 10, and mounting bushings 2 are inserted into the two mounting holes 10, and the tool is characterized in that it also comprises: a mounting bolt 8, the head end of which is connected to the tail end of the mounting bushing 2 through a threaded fastener; a removal support sleeve 7, which is a cylindrical structure, and the mounting bolt 8 is inserted into the inner hole of the removal support sleeve 7 along the axial direction, and the inner side end of the removal support sleeve 7 is connected to the inner side of the kitchen structure frame 1. The outer end faces are in contact; a pulling bolt 5, the tail end of which is coaxially connected to the hexagonal head 81 at the head end of the mounting bolt 8 through a connecting mechanism; a manual hydraulic cylinder 3, the head end of its piston rod is provided with a screw hole, the head end of the pulling bolt 5 is screwed into the screw hole at the head end of the piston rod, and the pulling bolt 5 is coaxially connected to the piston rod of the manual hydraulic cylinder 3; and a plurality of support sleeves 6, the support sleeves 6 are sleeved on the pulling bolt 5, the rear end face of the rearmost support sleeve 6 is in contact with the front end face of the removal support sleeve 7, and the front end face of the frontmost support sleeve 6 is in contact with the rear end face of the manual hydraulic cylinder 3. When it is necessary to remove the mounting bushing 2, insert the mounting bolt 8 into the mounting bushing 2, screw the threaded fastener from the square hole 9 of the fixing block 11 onto the mounting bolt 8, and realize the axial connection between the mounting bolt 8 and the mounting bushing 2. Then, the mounting bolt 8 and the pull-out bolt 5 are axially connected through the connecting mechanism, and the manual hydraulic cylinder 3 is actuated, and its piston rod is retracted inward, thereby pulling the pull-out bolt 5 outward and then using the mounting bolt 8 to pull the mounting bushing 2 outward from the mounting hole 10, so that the corroded mounting bushing 2 can be quickly and conveniently pulled out of the mounting hole 10, thereby improving work efficiency and reducing labor intensity. The reaction force generated by the manual hydraulic cylinder 3 is transmitted to the front end of the kitchen structure frame 1 through each support sleeve 6 and the removal support sleeve 7.

[0029] In one embodiment of the utility model, the threaded fastener can be the following structure, which includes a removal bushing 13 inserted into the mounting hole 10 and sleeved on the mounting bolt 8 and a nut 12 screwed on the mounting bolt 8, the front end face of the nut 12 contacts the rear end face of the removal bushing 13, and the front end face of the removal bushing 13 contacts the rear end face of the mounting bushing 2. After the mounting bolt 8 is inserted into the mounting bushing 2, the removal bushing 13 is sleeved on the tail end of the mounting bolt 8 and the nut 12 is tightened to achieve the connection and fixation of the tail end of the mounting bolt 8 and the mounting bushing 2 in the axial direction, and the operation is simple and convenient. The nut 12 and the removal bushing 13 are both located in the mounting hole 10, and when the mounting bolt 8 is pulled out, the nut 12 and the removal bushing 13 slide in the mounting hole 10 without interference. In this embodiment, the removal bushing 13 is composed of two semicircular arc bushings 131. When in use, the two semicircular arc bushings 131 are snapped on the mounting bolt 8, and the installation and disassembly are convenient.

[0030] In one embodiment of the utility model, the connection mechanism includes a slot I 51 provided at the tail end of the pull bolt 5 and a slot II 52 located at the rear end of the slot I 51. The slot I 51 matches the size of the hexagonal head 81, and the slot II 52 matches the outer diameter of the mounting bolt 8. When the hexagonal head 81 is inserted into the slot I 51 and the bolt 8 is inserted into the slot II 52, the pull bolt 5 is coaxial with the mounting bolt 8. By providing the slot I 51 and the slot II 52, the head end of the mounting bolt 8 can be conveniently inserted into the tail end of the pull bolt 5, so that the pull bolt 5 and the mounting bolt 8 can be quickly installed and removed, and the operation is convenient.

[0031] In one embodiment of the utility model, a handle 4 is further included which is fixed on the manual hydraulic cylinder 3, and the axis of the handle 4 is perpendicular to the axis of the manual hydraulic cylinder 3. The handle 4 can be used to conveniently hold the manual hydraulic cylinder 3, thereby improving the convenience of operation, and the handle 4 can be used to conveniently change the holding direction.

[0032] In one embodiment of the utility model, the support sleeve 6 is in a C-shaped structure, and is provided with an opening along the axial direction, and the width of the opening is greater than the outer diameter of the pull bolt 5. By providing the opening on the support sleeve 6, the support sleeve 6 can be conveniently inserted into the pull bolt 5 through the opening, further improving the convenience of installation and disassembly.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A special tool for repairing an A320 aircraft galley, comprising a galley structural frame (1) and a fixing block (11) located in the galley structural frame (1), wherein both the galley structural frame (1) and the fixing block (11) are provided with mounting holes (10), and mounting bushings (2) are inserted into the two mounting holes (10), wherein: Also includes: A mounting bolt (8) whose head end is connected to the tail end of the mounting bushing (2) via a threaded fastener; The removal support sleeve (7) is of a cylindrical structure, and the mounting bolt (8) is inserted into the inner hole of the removal support sleeve (7) by sliding along the axial direction, and the inner side end of the removal support sleeve (7) contacts the outer side end surface of the kitchen structure frame (1); A pull bolt (5), the tail end of which is coaxially connected to the hexagonal head (81) at the head end of the mounting bolt (8) through a connecting mechanism; A manual hydraulic cylinder (3) is provided with a screw hole at the head end of its piston rod, the head end of a pull bolt (5) is screwed into the screw hole at the head end of the piston rod, and the pull bolt (5) is coaxially connected to the piston rod of the manual hydraulic cylinder (3); and a plurality of support sleeves (6), wherein the support sleeves (6) are sleeved on the pull-out bolts (5), the rear end face of the rearmost support sleeve (6) contacts the front end face of the removal support sleeve (7), and the front end face of the frontmost support sleeve (6) contacts the rear end face of the manual hydraulic cylinder (3).

2. The special tooling for A320 aircraft galley repair according to claim 1, characterized in that: The threaded fastener comprises a removal bushing (13) inserted into the mounting hole (10) and sleeved on the mounting bolt (8), and a nut (12) screwed onto the mounting bolt (8), the front end face of the nut (12) being in contact with the rear end face of the removal bushing (13), and the front end face of the removal bushing (13) being in contact with the rear end face of the mounting bushing (2).

3. The special tool for repairing the galley of A320 aircraft according to claim 2, characterized in that: The removal bushing (13) is composed of two semicircular arc-shaped bushings (131).

4. The special tool for repairing the galley of A320 aircraft according to claim 1, characterized in that: The connecting mechanism comprises a slot I (51) arranged at the rear end of the pull bolt (5) and a slot II (52) located at the rear end of the slot I (51), wherein the slot I (51) matches the size of the hexagonal head (81), and the slot II (52) matches the outer diameter of the mounting bolt (8), and when the hexagonal head (81) is inserted into the slot I (51) and the bolt (8) is inserted into the slot II (52), the pull bolt (5) and the mounting bolt (8) are coaxial.

5. The special tool for repairing the galley of A320 aircraft according to claim 1, characterized in that: It also comprises a handle (4) fixed on the manual hydraulic cylinder (3), wherein the axis of the handle (4) is perpendicular to the axis of the manual hydraulic cylinder (3).

6. The special tool for repairing the galley of A320 aircraft according to claim 1, characterized in that: The support sleeve (6) is in a C-shaped structure and is provided with an opening along the axial direction, wherein the width of the opening is greater than the outer diameter of the pull bolt (5).

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