Special tool for detecting axial clearance of spherical ring and use method of special tool

Abstract

The invention discloses a special tool for axial clearance detection of a spherical ring and a use method thereof, and belongs to the technical field of aviation equipment. Comprising an upper cover plate, a lower cover plate, a fixed pressing block, an upper connector, a lower connector, a threaded sleeve, a cabinet table top, a supporting lining, a lever, a cam with a handle, a support A, a support B, a 20kg weight, a 10kg weight, a dial indicator and a universal connector. When the device is used, the cam with the handle is rotated, the 20kg weight is placed at the upper position or the lower position, the variation of the indicating value of the dial indicator is read, namely the displacement of the spherical ring, and the gap between the spherical ring and the support arm or the bearing ring is measured. The weight does not need to be moved manually, and time and labor are saved; the loading is accurate and effective, the dial indicator is high in measurement precision, and the axial clearance can be accurately measured.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation equipment, and in particular relates to a special tool for detecting the axial clearance of a spherical ring and a use method thereof. Background Art

[0002] Aircraft maintenance is the maintenance and repair of aircraft and its technical equipment. It maintains and improves the feasibility of aircraft and ensures the safety of aircraft. It is the premise and necessary condition for the use of aircraft and an important part of the aviation industry. In recent years, the equipment has continuously applied the latest scientific and technological achievements, with more advanced performance, more comprehensive technology and more complex structure, which brings great challenges to the regular maintenance, rapid maintenance and especially overhaul of aviation equipment.

[0003] When repairing a certain type of aircraft landing gear suspension, it is required to measure the axial clearance between the spherical ring and the support arm, and between the spherical ring and the bearing ring under a certain load, and the clearance should not be greater than a certain value. When the product is tested at the manufacturer, the tooling used is simple in structure, the test is laborious, and the weights need to be moved manually. In other aircraft repair factories of the same type, the tooling used to test the axial clearance is not accurate enough, and the test results are inaccurate, which affects the product quality. In order to solve the above problems, the present invention is proposed. Summary of the invention

[0004] The special tooling for detecting the axial clearance of a spherical ring described in the present invention can firmly fix the support arm (or bearing ring) on ​​the cabinet table, can fix the weight on the spherical ring to effectively load the spherical ring, and can accurately measure the axial clearance of the spherical ring.

[0005] The technical solution of the present invention:

[0006] A special tool for detecting the axial clearance of a spherical ring comprises an upper cover plate 1, a lower cover plate 2, a fixed pressure block 3, an upper joint 4, a lower joint 5, a screw sleeve 6, a cabinet table 7, a supporting bushing 8, a lever 9, a cam with a handle 10, a bracket A 11, a bracket B 12, a 20kg weight 13, a 10kg weight 14, a micrometer 15 and a universal joint 16.

[0007] The cabinet table top 7 is provided with square through holes and threaded holes;

[0008] The upper joint 4 comprises two sections, the cross section of the upper section is larger than the cross section of the lower section, and the lower section is provided with external threads;

[0009] The lower joint 5 comprises three sections, the cross sections of the upper section, the middle section and the lower section increase successively, the upper section is provided with an external thread; the middle section is square in cross section and fits with the square through hole gap of the cabinet table 7; the lower end of the lower section is connected to a 10kg weight 14.

[0010] The screw sleeve 6 is provided with internal threads in the same direction, which can be threadedly connected with the lower section of the upper joint 4 and the upper section of the lower joint 5 respectively.

[0011] The upper cover plate 1 and the lower cover plate 2 are provided with through holes in their centers. The upper cover plate 1 is located between the upper joint 4 and the screw sleeve 6, and the lower cover plate 2 is located between the lower joint 5 and the screw sleeve 6. The size of the through holes of the upper cover plate 1 and the lower cover plate 2 ensures that only the threaded sections of the upper joint 4 and the lower joint 5 can pass through. A spherical ring is placed on the upper surface of the lower cover plate 2; by tightening the threads of the upper joint 4, the lower joint 5 and the screw sleeve 6, the upper cover plate 1 and the lower cover plate 2 clamp the spherical ring.

[0012] The support bushing 8 is placed below the lower cover plate 2, and the upper end surface is used to support the bearing ring or the spherical surface of the support arm.

[0013] The fixed pressure block 3 is used to press the bearing ring or the spherical surface of the support arm from top to bottom, and preferably includes a bolt, a rotating handle, and a fixed block. The fixed block includes a horizontal beam and two vertical beams. The lower end face of the short vertical beam contacts the test piece to be pressed, and the long vertical beam has a threaded hole axially. The bolt passes through the threaded holes of the long vertical beam and the cabinet table 7 from top to bottom in sequence. The bolt head is connected to the rotating handle to save effort when the bolt is rotated. When the lower end face of the short vertical beam contacts the upper end face of the test piece to be pressed, a gap is left between the bottom end face of the long vertical beam and the surface of the cabinet table 7, and the test piece to be pressed is pressed by the lever action.

[0014] The micrometer 15 is arranged on the cabinet table 7 through the meter frame 17, and the micrometer rod is vertically pressed on the upper cover plate 1 to measure the displacement of the upper cover plate 1, and then measure the gap size between the spherical ring and the bearing ring, or between the spherical ring and the spherical surface of the support arm.

[0015] The bracket A11 is set on the cabinet table 7, and the top end is rotatably connected to the center of the lever 9. One end of the lever 9 is rotatably connected to the top of the universal joint 16. The bottom end of the universal joint 16 is rotatably connected to the top of the upper joint 4. The other end of the lever 9 is connected to the 20kg weight 13.

[0016] The bracket B12 is arranged on the cabinet table 7, and the top end is rotatably connected to the cam with handle 10. The eccentric rotation of the cam with handle 10 can raise and lower one end of the lever 9 connected to the 20kg weight 13.

[0017] On the lever 9 , the distance between one end connected to the 20 kg weight 13 and the rotation center of the lever 9 is equal to the distance between one end connected to the universal joint 16 and the rotation center of the lever 9 .

[0018] When in use, turn the cam 10 with handle to put the 20kg weight 13 in the upper position, and the 10kg weight 14 will load 98N downward to the spherical ring under the action of gravity, and the micrometer 15 will be zeroed. Turn the cam 10 with handle to convert the gravity of the 20kg weight 13 into a 196N load upward at the universal joint 16 through the lever 9. After the 196N load is offset by the 10kg weight 14 below, the remaining 98N load acts upward on the spherical ring. At this time, the change in the indication of the micrometer 15 is the displacement of the spherical ring, that is, the gap between the spherical ring and the support arm or the bearing ring is measured.

[0019] Beneficial effects of the present invention:

[0020] 1) The special tooling for detecting the axial clearance of a spherical ring described in the present invention adopts lever loading, such as Figure 4 As shown, there is no need to manually move the weights, saving time and effort;

[0021] 2) The special tooling for detecting the axial clearance of a spherical ring described in the present invention is firmly fixed, accurately and effectively loaded, and uses a micrometer with high measurement accuracy, and can accurately measure the axial clearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of a special tool for detecting the axial clearance of a spherical ring according to the present invention (mainly showing the cabinet body part).

[0023] Figure 2 This is a top view of a special tool for detecting the axial clearance of a spherical ring described in the present invention (mainly showing the table layout).

[0024] Figure 3 This is a partial view in the direction of A of a special tool for detecting the axial clearance of a spherical ring described in the present invention.

[0025] Figure 4 This is a partial view in the B direction of a special tool for detecting the axial clearance of a spherical ring described in the present invention.

[0026] Figure 5 Cam with handle.

[0027] Figure 6 Universal joint.

[0028] In the figure: 1-upper cover, 2-lower cover, 3-fixed pressure block, 4-upper joint, 5-lower joint, 6-screw sleeve, 7-cabinet table, 8-support bushing, 9-lever, 10-cam with handle, 11-bracket A, 12-bracket B, 13-20kg weight, 14-10kg weight, 15-micrometer, 16-universal joint, 17 meter stand. DETAILED DESCRIPTION

[0029] The present invention includes but is not limited to the above embodiments. Any equivalent replacement or partial improvement made under the principle of the spirit of the present invention shall be deemed to be within the protection scope of the present invention.

[0030] The tooling is a square movable cabinet with wheels, such as Figure 1 As shown. Various components for fixing and loading are installed on the cabinet table, such as Figure 2 to Figure 4 As shown. A support bushing 8 and three fixed pressure blocks 3 can fix an arm or a bearing ring on the table. The upper cover plate 1, the lower cover plate 2, the upper joint 4, the lower joint 5 and the screw sleeve 6 can together hang the 10kg weight 14 hinged under the lower joint 5 under the spherical ring. The upper joint 4 is hinged to one end of the lever 9 through the universal joint 16, and the 20kg weight 13 is hung on the other end of the lever 9. The lever 9 uses the bracket 11 as a fulcrum, and both ends can move up and down. The handle cam 10 is installed on the bracket 12, supporting one end of the lever 9 hanging the 20kg weight 13. The rotating handle cam 10 can contact one end of the lever 9 through eccentric rotation, thereby lifting or lowering the 20kg weight 13 by 6mm. The micrometer 15 is fixed to the position shown in the figure by the meter frame 17, and the micrometer rod is vertically pressed on the upper cover plate 1. The micrometer 15 can read data when it moves up and down.

[0031] When in use, turn the cam with handle 10 to put the 20kg weight 13 in the lower position. Put the assembled spherical ring and support arm (or bearing ring) on ​​the support bushing 8, fix the pressing block 3 and press Figure 2 After the position is set, rotate the bolts of the fixed pressure block 3 to press the support arm (or bearing ring) onto the cabinet table 7. The lower joint 5 passes through the cabinet table 7, the support bushing 8, and the lower cover plate 2 from bottom to top and is screwed into the screw sleeve 6; then the upper cover plate 1 is covered on the spherical ring, and the upper joint 4 is threaded downward through the upper cover plate 1 and screwed into the screw sleeve 6, and the upper joint 4 is tightened so that the upper cover plate 1 and the lower cover plate 2 tighten the spherical ring. Turn the cam with handle 10 to put the 20kg weight 13 in the upper position, and connect the lower end of the universal joint 16 with the upper joint 4 with bolts. At this time, the 10kg weight 14 loads 98N downward on the spherical ring under the action of gravity. For the convenience of reading, the micrometer is zeroed. Turn the cam with handle 10 to convert the gravity of the 20kg weight 13 into a 196N load upward at the universal joint 16 through the lever 9. After the 196N load is offset by the 10kg weight 14 below, the remaining 98N load acts on the spherical ring. At this time, the change in the indication of the micrometer is the displacement of the spherical ring, that is, the measured gap between the spherical ring and the support arm (or bearing ring).

[0032] (1) The special tooling for detecting the axial clearance of a spherical ring described in the present invention adopts lever loading, such as Figure 4As shown, after the support arm (or bearing ring) is firmly fixed, when it is necessary to load 98N downward, the cam with handle 10 is rotated to hold up the 20kg weight 13, the spherical ring loses the upward load, and the 10kg weight 14 on the left side acts downward on the spherical ring; when it is necessary to load 98N upward, the cam with handle 10 is rotated to lower the 20kg weight 13, and the spherical ring is subjected to a downward load of 98N and an upward load of 196N at the same time, and the total load is 98N upward.

[0033] (2) The cam 10 with a handle in the special tooling for detecting the axial clearance of a spherical ring described in the present invention is as follows: Figure 5 As shown, manual weight movement can be avoided, so that the loading of 20kg weight can be easily completed. Although the structure is simple, the effect is obvious.

[0034] (3) The spherical ring in the special tooling for detecting the axial clearance of the spherical ring described in the present invention is loaded and fixed, such as Figure 3 As shown, the upper cover plate 1, the lower cover plate 2, the upper joint 4, the lower joint 5 and the screw sleeve 6 work together to fix the spherical ring loading device to the spherical ring. For the convenience of operation, the shape of the lower joint 5 is square when it passes through the cabinet table 7, and the hole on the cabinet table 7 is a square hole, so that a wrench is not needed to fix the lower joint 5 when tightening the upper joint 4. In addition, in the assembly and debugging stage of a special tool for detecting the axial clearance of the spherical ring, the screw sleeve 6, the lower cover plate 2 and the lower joint 5 have been fixed into one body. When the spherical ring is not installed, the gravity of the 10kg weight 14 is borne by the lower cover plate 2; when the spherical ring is installed, the lower cover plate 2 and the lower joint 5 are lifted together with the 10kg weight 14 during the process of tightening the upper joint 4, so that it can ensure that the weight of the 10kg weight 14 is fully added to the spherical ring, and it can avoid moving the weight.

[0035] (4) The universal joint 16 in the special tooling for detecting the axial clearance of a spherical ring described in the present invention is as follows: Figure 6 When tightening the upper joint 4, the angle of the linking lug of the upper joint 4 may not be suitable for connecting with the lever 9. To solve this misalignment problem, a universal joint 16 is designed to easily connect the upper joint 4 and the lever 9.

Claims

1. A special tool for detecting the axial clearance of a spherical ring, characterized in that: It comprises an upper cover plate (1), a lower cover plate (2), a fixed pressure block (3), an upper joint (4), a lower joint (5), a screw sleeve (6), a cabinet table (7), a supporting bushing (8), a lever (9), a cam with a handle (10), a bracket A (11), a bracket B (12), a 20kg weight (13), a 10kg weight (14), a micrometer (15) and a universal joint (16); The cabinet tabletop (7) is provided with square through holes and threaded holes; The upper joint (4) comprises two sections, the cross section of the upper section is larger than the cross section of the lower section, and the lower section is provided with an external thread; The lower joint (5) comprises three sections, the cross sections of the upper section, the middle section and the lower section are successively larger, the upper section is provided with an external thread; the middle section is square in cross section and is gap-matched with the square through hole of the cabinet table (7); the lower end of the lower section is connected to a 10kg weight (14); The screw sleeve (6) is provided with internal threads in the same direction, which can be threadedly connected to the lower section of the upper joint (4) and the upper section of the lower joint (5) respectively; A through hole is arranged at the center of the upper cover plate (1) and the lower cover plate (2); the upper cover plate (1) is located between the upper joint (4) and the screw sleeve (6), and the lower cover plate (2) is located between the lower joint (5) and the screw sleeve (6); the size of the through holes of the upper cover plate (1) and the lower cover plate (2) ensures that only the threaded sections of the upper joint (4) and the lower joint (5) can pass through; a spherical ring is placed on the upper surface of the lower cover plate (2); and the upper cover plate (1) and the lower cover plate (2) are clamped together by tightening the threads of the upper joint (4), the lower joint (5) and the screw sleeve (6); The support bushing (8) is placed below the lower cover plate (2), and the upper end surface is used to support the bearing ring or the support arm; The fixed pressing block (3) is used to press the bearing ring or the supporting arm from top to bottom; The micrometer (15) is arranged on the cabinet table (7) through a meter frame 1 (17), and the micrometer rod is vertically pressed on the upper cover plate (1) to measure the displacement of the upper cover plate (1), and then measure the gap size between the spherical ring and the bearing ring, or between the spherical ring and the support arm; The bracket A (11) is arranged on the cabinet table (7), the top end of which is rotatably connected to the center of the lever (9), one end of the lever (9) is rotatably connected to the top end of the universal joint (16), the bottom end of the universal joint (16) is rotatably connected to the top end of the upper joint (4), and the other end of the lever (9) is connected to a 20 kg weight (13); The bracket B (12) is arranged on the cabinet table (7), and the top end is rotatably connected to the cam with handle (10). The cam with handle (10) can be rotated eccentrically to raise and lower one end of the lever (9) connected to the 20kg weight (13); On the lever (9), the distance between one end connected to the 20kg weight (13) and the rotation center of the lever (9) is equal to the distance between one end connected to the universal joint (16) and the rotation center of the lever (9).

2. A special tool for detecting axial clearance of a spherical ring according to claim 1, characterized in that: The fixed pressure block (3) comprises a bolt, a rotating handle, and a fixed block. The fixed block comprises a horizontal beam and two vertical beams. The lower end face of the short vertical beam contacts the test piece to be pressed. The long vertical beam is axially provided with a threaded hole. The bolt passes through the threaded holes of the long vertical beam and the cabinet table (7) from top to bottom in sequence. The bolt head is connected to the rotating handle to save effort when the bolt is rotated. When the lower end face of the short vertical beam contacts the upper end face of the test piece to be pressed, a gap is left between the bottom end face of the long vertical beam and the surface of the cabinet table (7), and the test piece to be pressed is pressed by the lever action.

3. The method for using the special tool for detecting the axial clearance of a spherical ring according to claim 1 or 2, characterized in that: When in use, the cam with handle (10) is rotated to place the 20kg weight (13) in the upper position, and the 10kg weight (14) loads 98N downward on the spherical ring under the action of gravity, and the micrometer (15) is zeroed; the cam with handle (10) is rotated to convert the gravity of the 20kg weight (13) into a 196N upward load at the universal joint (16) through the lever (9); After the 196N load is offset by the 10kg weight (14) below, the remaining 98N load acts on the spherical ring upward. At this time, the change in the indication of the micrometer (15) is the displacement of the spherical ring, that is, the gap between the spherical ring and the support arm or the bearing ring is measured.

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