Worm movement clearance measuring device for repairing reverse thrust actuator cylinder

Abstract

The utility model discloses a worm movement clearance measuring device for repairing a reverse thrust actuator cylinder, which comprises an actuator cylinder shell and a measuring tool, two jacking inner thread sleeves of the measuring tool are respectively in threaded connection with compression nuts at the upper end and the lower end of the actuator cylinder shell, and a first jacking rod is inserted into the inner bottom of each jacking inner thread sleeve in a penetrating manner; a second ejector rod is connected to the end of the first ejector rod located in the jacking inner threaded sleeve, a supporting frame is arranged outside the compression nut located at the upper end, a gauge stand and a dial gauge are arranged at the upper end of the supporting frame, and a gauge hand of the dial gauge penetrates through the gauge stand and the supporting frame to be pressed on the upper surface of the first ejector rod located at the upper end. The beneficial effects of the utility model are that when the clearance of the actuator cylinder shell is measured, the two jacking inner screw sleeves are respectively connected with the compression nuts at the upper end and the lower end of the actuator cylinder shell, the worm is located at the uppermost end, the jacking inner screw sleeve at the lower end is taken down from the lower end of the actuator cylinder shell, the worm is located at the lowermost end, and the clearance of the actuator cylinder shell is measured. Values of two positions are measured through the dial indicator, and a gap value is obtained.

Description

Technical Field

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

[0002] The thrust reverser actuator is an important component of the aircraft thrust reverser system. Its function is to move the thrust reverser cover and provide feedback data to the engine electronic control system. When repairing the thrust reverser actuator, it needs to go through multiple links such as disassembly, repair, testing, and assembly. Thrust bearings are arranged in the upper and lower ends of the thrust reverser actuator housing, and clamping nuts are also connected to the upper and lower ends of the actuator housing. The worm in the actuator housing passes through the thrust bearing and the clamping nut. Two rod shoulders are symmetrically arranged at the upper and lower ends of the worm in the actuator housing. The worm is limited by the interference between the two rod shoulders and the thrust bearing, but there is still a certain gap between the rod shoulder and the thrust bearing. This gap needs to be measured when assembling the thrust reverser actuator housing, but there is no suitable tooling equipment and tools available. It can only be calculated indirectly based on experience or after disassembly to measure the dimensions of multiple parts, and the accuracy is poor. Therefore, we propose a worm active gap measuring device for repairing thrust reversers. Utility Model Content

[0003] The utility model aims to provide a worm active clearance measuring device for repairing a reverse thrust actuator to solve the problems raised in the above-mentioned background technology.

[0004] A worm active clearance measuring device for repairing a reverse thrust actuator comprises an actuator housing and a measuring tool, wherein two tightening inner screw sleeves of the measuring tool are respectively threadedly connected with the clamping nuts at the upper and lower ends of the actuator housing, a first push rod is vertically inserted through the center of the bottom of the tightening inner screw sleeve, a second push rod is connected to the end of the first push rod located in the tightening inner screw sleeve, a limiting groove is provided at the end of the second push rod, the inner diameter of the limiting groove is the same as the outer diameter of the end of the worm in the actuator housing, and the worm can be inserted into the groove for positioning;

[0005] A support frame is arranged outside the clamping nut at the upper end, and the support frame is connected to the actuator cylinder housing by a long bolt. A dial base is arranged on the upper end of the support frame, and a second needle hole and a first needle hole are respectively opened at the center positions of the dial base and the upper end of the support frame. The needle of the micrometer arranged on the upper end of the dial base vertically passes through the second needle hole and the first needle hole and then presses on the upper surface of the first push rod at the upper end.

[0006] Preferably, a nylon gasket is provided between the inner bottom of the tightening inner screw sleeve and the second push rod, and the nylon gasket buffers the wear between the tightening inner screw sleeve and the second push rod.

[0007] Preferably, two side threaded holes are symmetrically and horizontally opened on the bottom side of the tightening inner thread sleeve, and a second through hole coaxial with the side threaded hole is opened on the first push rod. A limiting screw is threadedly connected to the side threaded hole from the outside to the inside, and the head of the limiting screw is inserted into the second through hole, and the first push rod is connected to the bottom of the tightening inner thread sleeve through the limiting screw.

[0008] Preferably, a first through hole is opened at the same position of the upper and lower frame plates of the support frame, and the long bolt passes downward through the first through hole and the preset through hole on the clamping nut and is connected to the threaded through hole on the actuator housing. The support frame is connected to the actuator housing through the long bolt, which is convenient for fixing and disassembly of the tooling.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] When measuring the clearance of the actuator housing, connect the two tightening inner screw sleeves to the clamping nuts at the upper and lower ends of the actuator housing respectively. After installation, the second push rod in the tightening inner screw sleeve at the lower end pushes the worm in the actuator housing to the uppermost position until the rod shoulder at the upper end of the worm contacts the thrust bearing at the upper end of the actuator housing. Then, install the support frame at the upper end of the actuator housing, and then install the dial base and the micrometer in sequence. When the needle of the micrometer passes through the second needle hole and the first needle hole and presses on the upper surface of the first push rod at the upper end, the value A1 is obtained.

[0011] Then remove the tightening inner screw sleeve at the lower end from the lower end of the actuator housing. At this time, the worm moves downward in the actuator housing under the action of gravity until the rod shoulder at the lower end of the worm contacts the thrust bearing at the lower end of the actuator housing. At this time, measure the value A2 of the upper surface position of the first push rod through the micrometer, and finally obtain the clearance value A2-A1, which is convenient, fast and accurate to obtain the clearance value, effectively improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural cross-sectional view of the utility model in the state of measuring the upper limit value;

[0013] Figure 2 This is a structural cross-sectional view of the utility model in the state of measuring the lower limit value;

[0014] Figure 3 This is a structural cross-sectional view of the actuator housing of the utility model;

[0015] Figure 4 It is a structural cross-sectional view of the utility model for tightening the inner screw sleeve.

[0016] In the figure: 1, actuator housing, 101, threaded through hole, 11, worm, 12, rod shoulder, 13, thrust bearing, 14, clamping nut, 2, measuring tool, 21, support frame, 211, first through hole, 212, first needle hole, 22, table base, 221, second needle hole, 222, groove, 23, long bolt, 24, micrometer, 25, tightening inner thread sleeve, 251, side threaded hole, 26, first push rod, 261, second through hole, 27, second push rod, 271, limit groove, 28, limit screw, 29, nylon gasket. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-4 A worm active clearance measuring device for repairing a reverse thrust actuator comprises an actuator housing 1 and a measuring tool 2, wherein two tightening inner thread sleeves 25 of the measuring tool 2 are respectively threadedly connected with the clamping nuts 14 at the upper and lower ends of the actuator housing 1, a first push rod 26 is vertically inserted through the center of the bottom of the tightening inner thread sleeve 25, two side threaded holes 251 are symmetrically and horizontally provided on the bottom side of the tightening inner thread sleeve 25, a second through hole 261 coaxial with the side threaded hole 251 is provided on the first push rod 26, a limiting screw 28 is threadedly connected to the side threaded hole 251 from the outside to the inside, the head of the limiting screw 28 is inserted into the second through hole 261, and the first push rod 26 is fixed to the bottom of the tightening inner thread sleeve 25 by the limiting screw 28 Connection; the end of the first push rod 26 located in the tightening inner thread sleeve 25 is connected to the second push rod 27, and a nylon gasket 29 is arranged between the inner bottom of the tightening inner thread sleeve 25 and the second push rod 27. The nylon gasket 29 buffers the wear between the tightening inner thread sleeve 25 and the second push rod 27. A limiting groove 271 is provided at the end of the second push rod 27. The inner diameter of the limiting groove 271 is the same as the outer diameter of the end of the worm 11 in the actuator housing 1, and the worm 11 can be inserted into the groove 271 for positioning; the second push rod 27 in the tightening inner thread sleeve 25 at the lower end can push the worm 11 in the actuator housing 1 to the uppermost position until the rod shoulder 12 at the upper end of the worm 11 contacts the thrust bearing 13 at the upper end of the actuator housing 1.

[0019] A support frame 21 is arranged outside the clamping nut 14 at the upper end, and the support frame 21 is connected to the actuator housing 1 by a long bolt 23. A first through hole 211 is opened at the same position of the upper and lower frame plates of the support frame 21, and the long bolt 23 passes downward through the first through hole 211 and the preset through hole on the clamping nut 14 and is connected to the threaded through hole 101 on the actuator housing 1. The support frame 21 is connected to the actuator housing 1 by the long bolt 23, which is convenient for fixing and disassembly of the tooling; a gauge seat 22 is arranged on the upper end of the support frame 21, and a second needle hole 221 and a first needle hole 212 are respectively opened at the center positions of the gauge seat 22 and the upper ends of the support frame 21, and the needle of the micrometer 24 arranged on the upper end of the gauge seat 22 vertically passes through the second needle hole 221 and the first needle hole 212 and is pressed on the upper surface of the first push rod 26 at the upper end.

[0020] Working principle: When measuring the clearance of the actuator housing, the two tightening inner screw sleeves 25 are connected to the clamping nuts 14 at the upper and lower ends of the actuator housing 1 respectively. After being installed in place, the second push rod 27 in the tightening inner screw sleeve 25 at the lower end pushes the worm 11 in the actuator housing 1 to the uppermost position until the rod shoulder 12 at the upper end of the worm 11 contacts the thrust bearing 13 at the upper end of the actuator housing 1;

[0021] Then, the support frame 21 is installed on the upper end of the actuator housing 1, and then the dial base 22 and the micrometer 24 are installed in sequence. When the needle of the micrometer 24 passes through the second needle hole 221 and the first needle hole 212 and presses on the upper surface of the first push rod 26 at the upper end, the value A1 is obtained;

[0022] Remove the tightening inner screw sleeve 25 at the lower end from the lower end of the actuator housing 1. At this time, the worm 11 moves downward in the actuator housing 1 under the action of gravity until the rod shoulder 12 at the lower end of the worm 11 contacts the thrust bearing 13 at the lower end of the actuator housing 1. At this time, measure the value A2 of the upper surface position of the first push rod 26 through the micrometer 24; finally, calculate A2-A1 to obtain the clearance value.

[0023] 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 worm gear clearance measuring device for repairing a reverse thrust actuator, comprising an actuator housing (1) and a measuring tool (2), characterized in that: The two tightening inner screw sleeves (25) of the measuring tool (2) are respectively threadedly connected to the clamping nuts (14) at the upper and lower ends of the actuator housing (1); a first push rod (26) is vertically inserted into the center of the bottom of the tightening inner screw sleeve (25); the end of the first push rod (26) located in the tightening inner screw sleeve (25) is connected to the second push rod (27); a limiting groove (271) is provided at the end of the second push rod (27); the inner diameter of the limiting groove (271) is the same as the outer diameter of the end of the worm (11) in the actuator housing (1); A support frame (21) is arranged outside the clamping nut (14) at the upper end, and the support frame (21) is connected to the actuator housing (1) through a long bolt (23). A gauge base (22) is arranged at the upper end of the support frame (21), and a second needle hole (221) and a first needle hole (212) are respectively opened at the center position of the gauge base (22) and the upper end of the support frame (21). The needle of the micrometer (24) arranged at the upper end of the gauge base (22) vertically passes through the second needle hole (221) and the first needle hole (212) and then presses on the upper surface of the first push rod (26) at the upper end.

2. A worm gear clearance measuring device for repairing a reverse thrust actuator according to claim 1, characterized in that: A nylon gasket (29) is provided between the inner bottom of the tightening inner screw sleeve (25) and the second push rod (27).

3. The device for measuring the clearance of a worm gear for repairing a reverse thrust actuator according to claim 1, characterized in that: The bottom side surface of the tightening inner screw sleeve (25) is symmetrically and horizontally provided with two side threaded holes (251); the first push rod (26) is provided with a second through hole (261) coaxial with the side threaded hole (251); a limit screw (28) is threadedly connected to the side threaded hole (251) from the outside to the inside; the head of the limit screw (28) is inserted into the second through hole (261).

4. The device for measuring the clearance of a worm gear for repairing a reverse thrust actuator according to claim 1, characterized in that: A first through hole (211) is provided at the same position of the upper and lower frame plates of the support frame (21), and the long bolt (23) passes downward through the first through hole (211) and a preset through hole on the clamping nut (14) and is connected to the threaded through hole (101) on the actuator housing (1).

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