Disassembling and assembling tool for double-pendulum vibration absorption bushing

Abstract

The utility model relates to the technical field of helicopter maintenance, in particular to a dismounting tool for a double-pendulum vibration absorption bushing, which comprises a feeding structure, a dismounting structure and a mounting structure, the dismounting structure is detachably mounted on the feeding structure and is used for dismounting the vibration absorption bushing, and the mounting structure is used for mounting the vibration absorption bushing. The mounting structure is detachably mounted on the feeding structure and used for mounting a vibration absorption bushing, the feeding structure comprises a first limiting assembly, a second limiting assembly and a feeding shaft, the first limiting assembly is mounted on the dismounting structure or the mounting structure and used for limiting one end of the feeding shaft, and the second limiting assembly is mounted on the dismounting structure or the mounting structure and used for limiting the other end of the feeding shaft. The second limiting assembly is installed on the feeding shaft in a threaded connection mode and can rotate relative to the feeding assembly. The problem that an existing vibration absorption lining is inconvenient to disassemble during disassembly is effectively solved. According to the utility model, the vibration absorption bushing can be clamped through the limiting separation blade in the dismounting structure and the external expansion step surface arranged on the main body, and then the vibration absorption bushing can be dismounted through the feeding structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of helicopter maintenance, and particularly relates to a dismounting tool for double-swing vibration absorption bushings. BACKGROUND

[0002] When a helicopter is parked on the ground, the blades of the rotor will naturally droop due to their own weight. When the helicopter is flying, the rotor is constantly rotating, and air flows over the upper surface of the blades, the flow pipe becomes thin, the flow rate increases, and the pressure decreases; when air flows over the lower surface of the blades, the flow pipe becomes thick, the flow rate decreases, and the pressure increases. In this way, a pressure difference is formed between the upper and lower surfaces of the blades, and an upward pulling force is generated on the blades. The pulling force is affected by many factors, such as the angle between the blades and the airflow, air density, the size and shape of the blades, and the relative speed of the airflow. The sum of the pulling forces of the blades is the pulling force of the rotor.

[0003] When the helicopter is flying, the blades of the rotor will form a large cone with a certain taper, with the bottom surface facing upwards, which is called a rotor cone. When the upward pulling force is greater than the weight of the helicopter, the helicopter rises; when the upward pulling force is less than the weight of the helicopter, the helicopter descends; and when the upward pulling force is equal to the weight of the helicopter, the helicopter hovers.

[0004] By controlling the inclination of the rotor cone in various directions, the direction of the rotor pulling force can be changed, thereby enabling the helicopter to fly in different directions. During the starting process of the rotor, the blades of the rotor will generate a large vibration. In order to prevent the vibration of the rotor from affecting the structure of the helicopter, a corresponding vibration absorption bushing is often used to absorb the vibration generated by the rotor.

[0005] After the vibration absorption bushing is used for a period of time, it needs to be replaced and maintained due to the wear of the rotor on the vibration absorption bushing. The existing dismounting method for the vibration absorption bushing generally uses an outer buckle to clamp the inner edge of the vibration absorption bushing, and then manually pulls it up.

[0006] However, this dismounting method only applies force to the edge of the buckle during dismounting, which is not convenient for dismounting the vibration absorption bushing. Moreover, when the buckle is dismounting the vibration absorption bushing, the buckle can scratch the inner edge of the workpiece containing the vibration absorption bushing. SUMMARY

[0007] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a dismounting tool for double-swing vibration absorption bushings, which effectively solves the problem of inconvenient dismounting of the existing vibration absorption bushings.

[0008] The utility model solves technical scheme, for double swing vibration absorbing bush's dismounting tool, including feed structure, dismounting structure and installation structure, the dismounting structure dismounts and installs on the feed structure is used for the dismounting of vibration absorbing bush, the installation structure dismounts and installs on the feed structure is used for the installation of vibration absorbing bush

[0009] Its characterized in be, the feed structure includes first limit subassembly, second limit subassembly and feed shaft, first limit subassembly installs on the dismounting structure or installation structure is used for the limit of one end of feed shaft, second limit subassembly is installed on the feed shaft through threaded connection and can rotate relative to feed component.

[0010] Preferably, the first limit component includes a sliding groove, a limiting column, a limiting groove, and a limiting ring. The sliding groove is opened in the dismounting structure or the installation structure. The limiting column is inserted into the sliding groove through a spring and is in sliding connection with the sliding groove. The limiting groove is opened in the end of the feed shaft inserted into the dismounting structure or the installation structure for accommodating the limiting column. The limiting ring is threadedly connected to the dismounting structure or the installation structure for limiting the end of the limiting column away from the limiting groove.

[0011] Preferably, the end of the limiting column away from the limiting groove is provided with an inclined surface facing away from the insertion direction of the feed shaft to the dismounting structure or the installation structure. The inner edge surface of the limiting ring can be in contact with the inclined surface of the limiting column.

[0012] Preferably, the second limit component includes a support ring and a threaded auxiliary ring. The threaded auxiliary ring is installed on the support ring and is in threaded connection with the feed shaft. The threaded auxiliary ring is fixedly connected with the support ring through a plurality of fixing shafts uniformly distributed along the axial direction thereof.

[0013] Preferably, the support ring is provided with an arc-shaped observation gap.

[0014] Preferably, the end of the feed shaft in threaded connection with the threaded auxiliary ring is provided with an inner concave wrench groove.

[0015] Preferably, the dismounting structure includes a main body and a limiting flake. The main body is provided with an outwardly expanding stepped surface on one side close to the limiting ring for cooperation with the upper edge of the vibration absorbing bush. The limiting flake is provided on the main body and is used in cooperation with the lower edge of the vibration absorbing bush. The limiting flake can be extended outwardly or retracted inwardly from the inside of the main body.

[0016] Preferably, the dismounting structure further includes a rotating push block. A plurality of clamping grooves are opened on the outer edge surface of the main body. The limiting flake is inserted into the clamping groove and is in sliding connection with the clamping groove. The rotating push block is located in the main body and is provided with a plurality of arc-shaped grooves corresponding to the clamping grooves. One end of the arc-shaped groove is inclined to the center direction of the feed shaft. One end of the limiting flake inserted into the main body is provided with a rotating column inserted into the arc-shaped groove.

[0017] Preferably, the mounting structure includes a positioning plate and a mounting plate. Both the positioning plate and the mounting plate are provided with positioning grooves that fit against the upper edge of the vibration-absorbing bushing. The contact surfaces of the positioning plate and the mounting plate are tangent to the outer edge of the upper edge of the vibration-absorbing bushing.

[0018] The beneficial effects of this utility model are as follows:

[0019] This utility model achieves the purpose of adapting the same set of feed structure to multiple disassembly and installation structures by disassembling and connecting the feed structure, disassembly structure and installation structure. Moreover, under the action of the first limiting component, the feed shaft can be disassembled and installed relatively conveniently.

[0020] This utility model allows the vibration-absorbing bushing to be snapped in place by disassembling the limiting baffle in the structure and the outwardly expanding stepped surface on the main body, and then disassembled by the feeding structure. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the combination of the disassembly structure and the feeding structure of this utility model;

[0022] Figure 2 This is a right-side cross-sectional view of the disassembly structure and the feed structure of this utility model.

[0023] Figure 3 This is a cross-sectional top view of the combined disassembly structure and feed structure of this utility model.

[0024] Figure 4 This is a cross-sectional top view of the combined disassembly structure and feed structure of this utility model.

[0025] Figure 5 This is a right-side view of the combined installation and feeding structures of this utility model.

[0026] Figure 6 This is a schematic diagram of the cross-sectional main view of the combined installation structure and feed structure of this utility model.

[0027] Figure 7 This is a cross-sectional bottom view of the combined installation structure and feed structure of this utility model.

[0028] In the diagram, 1-feed shaft; 2-sliding groove; 3-limiting post; 4-limiting groove; 5-limiting ring; 6-spring; 7-support ring; 8-thread auxiliary ring; 9-observation notch; 10-wrench groove; 11-main body; 12-limiting baffle; 13-outwardly expanding stepped surface; 14-rotating block; 15-slot; 16-arc groove; 17-rotating post; 18-positioning plate; 19-mounting plate; 20-positioning groove. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model will be further explained in detail below in combination with the drawings.

[0030] Referring to the drawings Figures 1-7 The dismounting tool for the double-swing vibration-absorbing bush includes a feeding structure, a dismounting structure and a mounting structure, wherein the dismounting structure and the mounting structure are detachably connected by the feeding structure, and the installation and dismounting of the vibration-absorbing bush by the dismounting structure and the mounting structure are realized through the feeding structure.

[0031] The feeding structure includes a first limiting assembly, a second limiting assembly and a feeding shaft 1, the first limiting assembly is installed on the dismounting structure or the mounting structure for limiting one end of the feeding shaft 1, the second limiting assembly is installed on the feeding shaft 1 through threaded connection and can rotate relative to the feeding assembly, the feeding shaft 1 is detachably connected between the first limiting assembly and the dismounting structure or the mounting structure, and the second limiting assembly is used in cooperation with a workpiece for accommodating the vibration-absorbing bush and can assist the feeding shaft 1 to drive the dismounting structure or the mounting structure to move relative to the workpiece for accommodating the vibration-absorbing bush.

[0032] The first limiting assembly includes a sliding groove 2, a limiting column 3, a limiting groove 4 and a limiting ring 5, the sliding groove 2 is opened on the dismounting structure or the mounting structure, the limiting column 3 is inserted into the sliding groove 2 through a spring 6 and is in sliding connection with the sliding groove 2, the limiting groove 4 is opened on the end of the feeding shaft 1 inserted into the dismounting structure or the mounting structure for accommodating the limiting column 3, and the limiting ring 5 is threaded on the dismounting structure or the mounting structure for limiting one end of the limiting column 3 away from the limiting groove 4, the limiting ring 5 can limit the limiting column 3, so that the limiting column 3 can be inserted into the limiting groove 4 for a long time to limit the feeding shaft 1, and when the limiting ring 5 does not limit the limiting column 3, the limiting column 3 moves out of the limiting groove 4 under the action of the spring 6, so that the feeding shaft 1 can be detached from the mounting structure or the dismounting structure.

[0033] One end of the limiting column 3 away from the limiting groove 4 is provided with an inclined surface facing away from the insertion direction of the feeding shaft 1 to the dismounting structure or the mounting structure, and the inner edge surface of the limiting ring 5 can be in contact with the inclined surface of the limiting column 3, because one end of the limiting column 3 close to the limiting ring 5 is an inclined surface, so that the pressing feeding of the limiting column 3 can be better realized when the limiting ring 5 is rotated.

[0034] The second limiting assembly includes a supporting ring 7 and a threaded auxiliary ring 8, the threaded auxiliary ring 8 is installed on the supporting ring 7 and is in threaded connection with the feeding shaft 1, the threaded auxiliary ring 8 is fixedly connected with the supporting ring 7 through a plurality of fixing shafts uniformly distributed along the axial direction of the threaded auxiliary ring 8, the inner diameter of the supporting ring 7 is greater than the outer diameter of the vibration-absorbing bush, and the supporting ring 7 is in abutment with the end surface of the workpiece for accommodating the vibration-absorbing bush, so that the vibration-absorbing bush can be better provided with a space for giving way.

[0035] An arc-shaped observation gap 9 is formed on the support ring 7, and the position of the vibration-absorbing bushing can be directly observed, so that the operator can operate more conveniently.

[0036] A concave wrench groove 10 is formed on one end of the feed shaft 1 which is threadedly connected with the threaded auxiliary ring 8, and the wrench groove 10 is used to accommodate an operating wrench, so that the operator can better rotate the feed shaft 1.

[0037] The dismounting structure comprises a main body 11 and a limiting baffle 12, the main body 11 is provided with an outwardly expanded stepped surface 13 which is used in cooperation with the upper edge of the vibration-absorbing bushing, and the limiting baffle 12 is arranged on the main body 11 and is used in cooperation with the lower edge of the vibration-absorbing bushing, the limiting baffle 12 can be extended outwardly or retracted inwardly from the main body 11, the outwardly expanded stepped surface 13 and the limiting baffle 12 are used in cooperation to accommodate the vibration-absorbing bushing, and the vibration-absorbing bushing can be better dismounted in cooperation with the feed shaft 1 and the support ring 7, and the limiting baffle 12 can be retracted inwardly, so that the main body 11 will not be interfered when moving into the vibration-absorbing bushing.

[0038] The dismounting structure further comprises a rotating push block 14, a plurality of clamping grooves 15 are formed on the outer edge surface of the main body 11, the limiting baffle 12 is inserted into the clamping grooves 15 and is slidably connected with the clamping grooves 15, the rotating push block 14 is arranged in the main body 11 and is provided with a plurality of arc-shaped grooves 16 which correspond to the clamping grooves 15, one end of the arc-shaped grooves 16 is inclined to the axis direction of the feed shaft 1, one end of the limiting baffle 12 which is inserted into the main body 11 is provided with a rotating column 17 which is inserted into the arc-shaped grooves 16, the arc-shaped grooves 16 are rotated from one end which is close to the axis direction of the feed shaft 1 to the other end which is far away from the axis direction of the feed shaft 1 by rotating the rotating push block 14, so that the limiting baffles 12 are extended, and vice versa.

[0039] The mounting structure comprises a positioning plate 18 and a mounting plate 19, the positioning plate 18 and the mounting plate 19 are both provided with positioning grooves 20 which are used in cooperation with the upper edge of the vibration-absorbing bushing, the contact surface of the positioning plate 18 and the mounting plate 19 is tangent to the outer edge surface of the upper edge of the vibration-absorbing bushing, one end of the positioning plate 18 which is close to the mounting plate 19 is provided with a tangent surface which is tangent to the upper edge of the vibration-absorbing bushing, one of the vibration-absorbing bushings is mounted by the positioning plate 18 first, after the mounting is completed, the other vibration-absorbing bushing is placed in the positioning groove 20 on the mounting plate 19, and one side surface of the mounting plate 19 is tangent to the tangent surface on the positioning plate 18, at this time, the vibration-absorbing bushing on the mounting plate 19 is completely aligned with the hole position, and the vibration-absorbing bushing is completely pressed into the hole position under the action of the feed shaft 1 and the support ring 7.

[0040] When the utility model is used, the operator firstly inserts one end of the feed shaft 1 into the main body 11, and then rotates the limiting ring 5 to press and limit the inclined surface of the limiting column 3, so that the limiting column 3 is inserted into the limiting groove 4 to limit the feed shaft 1.

[0041] When the feed shaft 1 is limited, the worker inserts the main body 11 into the vibration absorbing bush to be disassembled, the outer expansion step surface 13 of the main body 11 is in contact with the upper edge surface of the vibration absorbing bush, the worker rotates the rotary knob 14, the rotary knob 14 drives the limiting baffle 12 to stretch out from the main body 11 through the arc-shaped groove 16 and is clamped below the vibration absorbing bush, the worker installs the supporting ring 7 from the one end of the feed shaft 1 outside the vibration absorbing bush, the supporting ring 7 is in contact with the workpiece outer edge surface of the vibration absorbing bush, the worker manually holds the supporting ring 7 and rotates the feed shaft 1 by using the wrench groove 10, so that the vibration absorbing bush is disassembled and moved, and the vibration absorbing bush can be better disassembled under the action of the internal space of the supporting ring 7 and the observation gap 9;

[0042] After disassembly, the worker places the new vibration absorbing bush in the positioning groove 20, rotates the feed shaft 1 from the other side, and gradually presses one of the vibration absorbing bushes into the workpiece under the action of the supporting ring 7 and the positioning plate 18, when one of the vibration absorbing bushes is installed, the worker places the new vibration absorbing bush in the positioning groove 20 on the mounting plate 19, aligns the mounting plate 19 with the positioning plate 18 through the edge surface of the vibration absorbing bush, and rotates the feed shaft 1 to press the vibration absorbing bush into the other hole.

[0043] The utility model discloses a feed structure and dismounting structure and installation structure's dismounting connection can realize the same set of feed structure adapts the purpose of multiple dismounting structure and installation structure, and under the action of first limiting component, can be relatively convenient to dismount installation to feed shaft 1.

[0044] The utility model discloses a limiting baffle 12 in dismounting structure and the outer expansion step surface 13 set up on the main body 11 can clamp the vibration absorbing bush and dismount the vibration absorbing bush through the feed structure.

Claims

1. A tool for dismounting and mounting a double pendulum vibration absorbing bushing, comprising a feeding structure, a dismounting structure and a mounting structure, the dismounting structure being mounted on the feeding structure for dismounting the vibration absorbing bushing, and the mounting structure being mounted on the feeding structure for mounting the vibration absorbing bushing. characterized in that The feeding structure comprises a first limiting component, a second limiting component and a feeding shaft (1), the first limiting component being mounted on the dismounting structure or the mounting structure for limiting one end of the feeding shaft (1), and the second limiting component being threadedly mounted on the feeding shaft (1) and being rotatable relative to the feeding component.

2. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 1, characterized in that: The first limiting component comprises a sliding groove (2), a limiting column (3), a limiting groove (4) and a limiting ring (5), the sliding groove (2) being formed on the dismounting structure or the mounting structure, the limiting column (3) being inserted into the sliding groove (2) and being slidably connected with the sliding groove (2) through a spring (6), the limiting groove (4) being formed on the end of the feeding shaft (1) inserted into the dismounting structure or the mounting structure for accommodating the limiting column (3), and the limiting ring (5) being threadedly connected with the dismounting structure or the mounting structure for limiting one end of the limiting column (3) away from the limiting groove (4).

3. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 2, characterized in that: One end of the limiting column (3) away from the limiting groove (4) is formed with an inclined surface facing away from the direction of the dismounting structure or the mounting structure being inserted into the feeding shaft (1), and the inner edge surface of the limiting ring (5) is in contact with the inclined surface of the limiting column (3).

4. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 1, characterized in that: The second limiting component comprises a supporting ring (7) and a threaded auxiliary ring (8), the threaded auxiliary ring (8) being mounted on the supporting ring (7) and being threadedly connected with the feeding shaft (1), and the threaded auxiliary ring (8) being fixedly connected with the supporting ring (7) through a plurality of fixing shafts uniformly distributed along the axial direction of the threaded auxiliary ring (8).

5. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 4, characterized in that: An arc-shaped observation gap (9) is formed on the supporting ring (7).

6. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 5, characterized in that: A concave wrench groove (10) is formed on one end of the feeding shaft (1) threadedly connected with the threaded auxiliary ring (8).

7. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 6, characterized in that: The dismounting structure comprises a main body (11) and a limiting flake (12), the main body (11) being provided with an outwardly expanding stepped surface (13) on one side close to the limiting ring (5) for cooperating with the upper edge of the vibration absorbing bushing, and the limiting flake (12) being provided on the main body (11) and being used for cooperating with the lower edge of the vibration absorbing bushing, the limiting flake (12) being capable of being extended outwardly or retracted inwardly from the inside of the main body (11).

8. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 7, characterized in that: The dismounting structure further comprises a rotating block (14), a plurality of clamping grooves (15) are formed on the outer edge surface of the main body (11), the limiting flake (12) is inserted into the clamping grooves (15) and is slidably connected with the clamping grooves (15), the rotating block (14) is located in the main body (11) and is formed with a plurality of arc-shaped grooves (16) corresponding to the clamping grooves (15), one end of the arc-shaped grooves (16) is inclined toward the axial direction of the feeding shaft (1), and one end of the limiting flake (12) inserted into the main body (11) is provided with a rotating column (17) inserted into the arc-shaped grooves (16).

9. The tool for disassembling and assembling a double pendulum vibration absorber sleeve according to claim 6, characterized in that: The mounting structure comprises a locating plate (18) and a mounting plate (19), the locating plate (18) and the mounting plate (19) are provided with locating grooves (20) which are in contact with the upper edge of the vibration absorbing bushing, and the contact surface of the locating plate (18) and the mounting plate (19) is tangent to the outer edge surface of the upper edge of the vibration absorbing bushing.

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