Special tool for detecting axial clearance of spherical ring

Abstract

The utility model discloses a special tool for axial clearance detection of a spherical ring, 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, so that 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] This utility model belongs to the field of aviation equipment technology, specifically relating to a special tooling for detecting the axial clearance of a spherical ring. Background Technology

[0002] Aircraft maintenance refers to the upkeep and repair of aircraft and their technical equipment. Maintaining and improving aircraft operational readiness and ensuring aircraft safety are prerequisites and necessary conditions for aircraft use, and are also an important component of the aviation industry. In recent years, equipment has continuously incorporated the latest technological advancements, resulting in more advanced performance, more integrated technologies, and more complex structures, posing significant challenges to the scheduled maintenance, rapid maintenance, and especially major overhauls of aviation equipment.

[0003] When repairing landing gear suspension components of a certain type of aircraft, it is required that the axial clearance between the spherical ring and the support arm, and between the spherical ring and the bearing ring, be measured under a certain load and should not exceed a certain value. During testing at the manufacturing plant, the tooling used is simple in structure and labor-intensive, requiring manual handling of weights. In other repair shops for this type of aircraft, the tooling used to test this axial clearance lacks sufficient accuracy, resulting in inaccurate test results and affecting product quality. To solve these problems, this utility model is proposed. Utility Model Content

[0004] The axial clearance testing fixture for spherical rings described in this utility model can firmly fix the support arm (or bearing ring) to the cabinet platform, fix weights on the spherical ring to effectively load the spherical ring, and accurately measure the axial clearance of the spherical ring.

[0005] The technical solution of this utility model:

[0006] A special tooling for detecting the axial clearance of a spherical ring includes an upper cover plate 1, a lower cover plate 2, a fixing block 3, an upper connector 4, a lower connector 5, a screw sleeve 6, a cabinet table 7, a support 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 dial indicator 15, and a universal joint 16.

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

[0008] The upper connector 4 comprises two sections, with the upper section having a larger cross-section than the lower section, and the lower section having an external thread;

[0009] The lower connector 5 comprises three sections, with the cross-sections of the upper, middle, and lower sections increasing sequentially. The upper section is provided with external threads; the middle section has a square cross-section that fits with the square through hole of the cabinet surface 7 with clearance; and the lower end of the lower section is connected to a 10kg weight 14.

[0010] The screw sleeve 6 is internally provided with internal threads in the same direction, which can be screwed 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 centrally provided with through holes, the upper cover plate 1 is located between the upper joint 4 and the screw sleeve 6, the lower cover plate 2 is located between the lower joint 5 and the screw sleeve 6, and 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. The upper surface of the lower cover plate 2 is provided with a spherical ring; by screwing 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 pressing block 3 is used to press the bearing ring or the spherical surface of the support arm from top to bottom, preferably including a bolt, a rotating handle and a fixed block, the fixed block includes a horizontal beam and two vertical beams, the lower end surface of the short vertical beam is in contact with the to-be-pressed member, and a threaded hole is axially formed in the long vertical beam, the bolt is sequentially threaded from top to bottom through the long vertical beam and the threaded hole of the cabinet top surface 7, and the bolt head is connected with the rotating handle, which is used to save labor when the bolt is rotated. When the lower end surface of the short vertical beam is in contact with the upper end surface of the to-be-pressed member, the bottom end surface of the long vertical beam leaves a gap with the surface of the cabinet top surface 7, and the pressing of the to-be-pressed member is realized through the lever action.

[0014] The dial gauge 15 is arranged on the cabinet top surface 7 through the dial gauge stand 17, the dial gauge rod is vertically clamped on the upper cover plate 1, which is used to measure the displacement of the upper cover plate 1, and then the size of the gap between the spherical ring and the bearing ring or the gap between the spherical ring and the spherical surface of the support arm is measured.

[0015] The support A11 is arranged on the cabinet top surface 7, the top end is rotationally connected with the center of the lever 9, one end of the lever 9 is rotationally connected with the top end of the universal joint 16, the bottom end of the universal joint 16 is rotationally connected with the top end of the upper joint 4, and the other end of the lever 9 is connected with the 20kg weight 13.

[0016] The support B12 is arranged on the cabinet top surface 7, the top end is rotationally connected with the handle cam 10, and the one end of the lever 9 connected with the 20kg weight 13 can be lifted and lowered through the eccentric rotation of the handle cam 10.

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

[0018] In use, rotate the cam 10 with the handle to place the 20kg weight 13 in the upper position. Under the action of gravity, the 10kg weight 14 applies a downward load of 98N to the spherical ring. Zero the dial indicator 15. Rotate the cam 10 with the handle so that the gravity of the 20kg weight 13 is converted into an upward load of 196N at the universal joint 16 through the lever 9. After the 98N load is offset by the 10kg weight 14 below, the remaining 98N load acts upward on the spherical ring. The change in the reading of the dial indicator 15 at this time is the displacement of the spherical ring, that is, the gap between the spherical ring and the support arm or bearing ring is measured.

[0019] The beneficial effects of this utility model are:

[0020] 1) The special tooling for detecting the axial clearance of a spherical ring described in this utility model 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 this utility model is fixed firmly, loads accurately and effectively, and uses a dial indicator with high measurement accuracy, which can accurately measure the axial clearance. Attached Figure Description

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

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

[0024] Figure 3 This is a partial view along direction A of the special tooling for detecting the axial clearance of a spherical ring according to the present invention.

[0025] Figure 4 This is a partial view along direction B of the special tooling for detecting the axial clearance of a spherical ring according to the present invention.

[0026] Figure 5 Cam with handle.

[0027] Figure 6 Universal joint.

[0028] In the diagram: 1-Upper cover plate, 2-Lower cover plate, 3-Fixing block, 4-Upper connector, 5-Lower connector, 6-Screw sleeve, 7-Cabinet surface, 8-Support bushing, 9-Lever, 10-Cam with handle, 11-Bracket A, 12-Bracket B, 13-20kg weight, 14-10kg weight, 15-Dial indicator, 16-Universal connector, 17-Indicator holder. Detailed Implementation

[0029] The utility model includes but is not limited to the above embodiment, any equivalent replacement or partial improvement under the principle of the utility model spirit will be regarded as within the protection scope of the utility model.

[0030] The tool is a square wheeled movable cabinet body, as shown in the drawings. Figure 1 As shown in the drawings, each spare part for fixing and loading is installed on the cabinet top, as shown in the drawings. Figures 2 to 4 One support bushing 8 and three fixing blocks 3 can fix one support arm or bearing ring on the top. The upper cover plate 1, the lower cover plate 2, the upper joint 4, the lower joint 5 and the screw sleeve 6 together can hang the 10kg weight 14 hinged under the lower joint 5 below the spherical ring. The upper joint 4 is hinged at one end of the lever 9 through the universal joint 16, and the 20kg weight 13 is hung at the other end of the lever 9. The lever 9 takes the support 11 as the fulcrum, and the two ends can move up and down. The handle cam 10 is installed on the support 12, supporting one end of the lever 9 hanging the 20kg weight 13, and rotating the handle cam 10 can contact one end of the lever 9 through eccentric rotation, and then lift or lower the 20kg weight 13 by 6mm. The micrometer 15 is fixed in the position shown by the table stand 17, and the micrometer rod is vertically on the upper cover plate 1, and the micrometer 15 can read data when moving up and down.

[0031] When in use, rotate the handle cam 10, so that the 20kg weight 13 is in the lower position. Put the assembled spherical ring and support arm (or bearing ring) on the support bushing 8, and put the fixing block 3 in the Figure 2 position, and rotate the bolt of the fixing block 3 to press the support arm (or bearing ring) on the cabinet top 7. The lower joint 5 is screwed into the screw sleeve 6 from the bottom to the top of the cabinet top 7, the support bushing 8 and the lower cover plate 2, and then the upper cover plate 1 is covered on the spherical ring, and the upper joint 4 is screwed into the screw sleeve 6 after being screwed downward through the upper cover plate 1, and the upper joint 4 is tightened to tighten the spherical ring of the upper cover plate 1 and the lower cover plate 2. Rotate the handle cam 10, so that the 20kg weight 13 is in the upper position, and the lower end of the universal joint 16 is linked with the upper joint 4 by a bolt. At this time, the 10kg weight 14 gives the spherical ring a downward load of 98N under the action of gravity, and the micrometer is zeroed for easy reading. Rotate the handle cam 10, so that the gravity of the 20kg weight 13 is converted into an upward load of 196N at the universal joint 16 through the lever 9. After the 196N load is offset by the 10kg weight 14 below to 98N load, the remaining 98N load acts upward on the spherical ring, and the change of the indication value of the micrometer at this time is the displacement of the spherical ring, that is, the clearance between the spherical ring and the support arm (or bearing ring) is measured.

[0032] (1) The spherical ring axial clearance detection special tool adopts lever loading, as shown in the drawings. Figure 4As shown, after the arm (or bearing ring) is fixed firmly, when 98N needs to be loaded downward, the rotating handle cam 10 lifts the 20kg weight 13, the spherical ring loses the upward load, and the left 10kg weight 14 acts on the spherical ring; when 98N needs to be loaded upward, the rotating handle cam 10 lowers the 20kg weight 13, and the spherical ring is subjected to the downward 98N and upward 196N loads, and the total load is the upward 98N.

[0033] (2) The handle cam 10 in the special tool for detecting the axial gap of the spherical ring, as shown in Figure 5 , can avoid manual moving of the weight, thereby easily completing the loading of the 20kg weight. The structure is simple, but the effect is obvious.

[0034] (3) The spherical ring loading and fixing in the special tool for detecting the axial gap of the spherical ring, as shown in Figure 3 , the upper cover plate 1, the lower cover plate 2, the upper joint 4, the lower joint 5 and the screw sleeve 6 jointly fix the spherical ring loading device to the spherical ring. In order to facilitate operation, when the lower joint 5 passes through the cabinet top surface 7, the shape of the part is square, and the hole on the cabinet top surface 7 is a square hole, so that the lower joint 5 does not need to be fixed by a wrench when the upper joint 4 is tightened. In addition, during the assembly and debugging stage of the special tool for detecting the axial gap of the spherical ring, the screw sleeve 6, the lower cover plate 2 and the lower joint 5 are fixed as a whole, and 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, the lower joint 5 and the 10kg weight 14 are lifted together during the tightening of the upper joint 4, so that the weight of the 10kg weight 14 can be fully added to the spherical ring, and the weight can be moved.

[0035] (4) The universal joint 16 in the special tool for detecting the axial gap of the spherical ring, as shown in Figure 6 . When the upper joint 4 is tightened, the angle of the linking ear of the upper joint 4 may not be suitable for the connection of the lever 9, in order to solve the problem of the angle not being correct, the universal joint 16 is designed to easily connect the upper joint 4 and the lever 9.

Claims

1. A special tooling for detecting the axial clearance of a spherical ring, characterized in that, Includes an upper cover plate (1), a lower cover plate (2), a fixing block (3), an upper connector (4), a lower connector (5), a screw sleeve (6), a cabinet tabletop (7), a support 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 dial indicator (15), and a universal joint (16); The cabinet countertop (7) is provided with square through holes and threaded holes; The upper connector (4) comprises two sections, with the upper section having a larger cross-section than the lower section, and the lower section having an external thread; The lower connector (5) consists of three sections, with the cross-sections of the upper, middle and lower sections increasing sequentially. The upper section is provided with external threads; the middle section has a square cross-section that fits with the square through hole of the cabinet tabletop (7) with clearance; and the lower end of the lower section is connected to a 10kg weight (14). The screw sleeve (6) has internal threads in the same direction, which can be connected to the lower section of the upper connector (4) and the upper section of the lower connector (5) respectively. The upper cover plate (1) and the lower cover plate (2) are provided with through holes in the center. The upper cover plate (1) is located between the upper connector (4) and the screw sleeve (6), and the lower cover plate (2) is located between the lower connector (5) and the screw sleeve (6). The size of the through holes of the upper cover plate (1) and the lower cover plate (2) is ensured to allow only the threaded sections of the upper connector (4) and the lower connector (5) to pass through. A spherical ring is placed on the upper surface of the lower cover plate (2). By tightening the threads of the upper connector (4), the lower connector (5) and the screw sleeve (6), the upper cover plate (1) and the lower cover plate (2) clamp the spherical ring. The support bushing (8) is placed below the lower cover plate (2), and its upper end is used to support the bearing ring or the support arm; The fixing block (3) is used to press the bearing ring or support arm from top to bottom; The dial indicator (15) is set on the cabinet table (7) via the indicator frame 1 (17). The dial indicator rod is vertically pressed against the upper cover plate (1) to measure the displacement of the upper cover plate (1) and thus measure the size of the gap between the spherical ring and the bearing ring, or between the spherical ring and the support arm. The bracket A (11) is set on the cabinet table (7), and its top end 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 20kg weight (13). The bracket B (12) is set on the cabinet table (7), and its top end is rotatably connected to the cam (10) with a handle. It can raise and lower one end of the lever (9) connected to the 20kg weight (13) by the eccentric rotation of the cam (10). On the lever (9), the distance between the end connected to the 20kg weight (13) and the rotation center of the lever (9) is equal to the distance between the end connected to the universal joint (16) and the rotation center of the lever (9).

2. The special tooling for detecting the axial clearance of a spherical ring according to claim 1, characterized in that, The fixing block (3) includes bolts, a rotating handle, and a fixing block. The fixing block includes a horizontal beam and two vertical beams. The lower end face of the short vertical beam is in contact with the test piece to be pressed. The long vertical beam has a threaded hole in the axial direction. The bolt passes through the threaded hole of the long vertical beam and the cabinet table (7) from top to bottom. The bolt head is connected to the rotating handle to save effort when rotating the bolt. When the lower end face of the short vertical beam is in contact with the upper end face of the test piece to be pressed, there is a gap between the bottom end face of the long vertical beam and the surface of the cabinet table (7). The test piece to be pressed is pressed by lever action.

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