Assembly capable of meeting installation sinking amount of straight lining through extrusion strengthening

Abstract

The utility model provides an assembly capable of meeting the installation sinking amount of a straight lining through extrusion strengthening. The lining is arranged in a base body, and the lining is in clearance fit with the base body; the assembly comprises a limiting gasket provided with a boss, and the boss is arranged in the base body; the slotting limiting rod is provided with an inner hole, and one end of the slotting limiting rod abuts against the limiting gasket; one end of the extrusion core rod is arranged in the bushing, and the other end of the extrusion core rod is arranged in the inner hole; wherein the diameter of the extrusion core rod is greater than the inner diameter of the bushing; the extrusion core rod can extrude and move to pass through the bushing and the limiting gasket to finish the extrusion assembly process; the assembly can be positioned and fixed by connecting the extrusion core rod and the pull rod in a threaded mode, the assembly can be fixed by one operator, extrusion strengthening implementation is carried out, the operation efficiency is remarkably improved, and the labor cost and the operation intensity are greatly reduced.

Description

Technical Field

[0001] This application belongs to the technical field of helicopter rotor system assembly and tools, and particularly relates to a combination component that meets the installation depression of a straight bushing through extrusion strengthening. Background Art

[0002] Anti-fatigue technology is applied to the fatigue weak areas of important parts of the helicopter main hub, and hole extrusion strengthening technology is used at the key connection holes of helicopter parts to prevent premature failure of the key connection holes. The main parts of the main hub are subjected to complex forces. In addition to bearing their own forces and torques, they also need to provide installation connection holes for other components. A bushing is installed in the hole and connected to other components.

[0003] The bushing installation hole system is perpendicular to the assembly surface and has requirements for the depression. To achieve a qualified one-time assembly, the difficulty of the extrusion strengthening installation of the straight bushing also increases accordingly. There is an urgent need for an assembly tool that meets the extrusion strengthening installation depression of the straight bushing. Utility Model Content

[0004] Purpose of this application: To meet the requirement of the depression for the one-time assembly of the extrusion strengthening of the straight bushing, a combination component that meets the depression of the extrusion strengthening installation of the straight bushing is provided, with a simple and convenient structure. It can meet the requirements of the extrusion strengthening installation depression of the straight bushing for helicopter moving parts, improve production efficiency, stabilize product quality, and is suitable for mass production.

[0005] This application provides a combination component that meets the installation depression of the straight bushing through extrusion strengthening. The bushing is arranged in the base body, and the bushing is in clearance fit with the base body; the combination component includes:

[0006] A limit gasket with a boss, and the boss is arranged in the base body;

[0007] A slotted limit rod with an inner hole, and one end of the slotted limit rod abuts against the limit gasket;

[0008] An extrusion mandrel, one end of the extrusion mandrel is arranged in the bushing, and the other end is arranged in the inner hole; wherein, the diameter of the extrusion mandrel is larger than the inner diameter of the bushing; the extrusion mandrel can perform an extrusion movement through the bushing and the limit gasket to complete the extrusion assembly process.

[0009] Preferably, the other end of the extrusion mandrel is provided with a thread; the combination component further includes:

[0010] A pull rod, which is threadedly connected to the other end of the extrusion mandrel.

[0011] Preferably, the combination component further includes:

[0012] A hydraulic drawing gun, connected to the pull rod, is used to provide a pulling force to the pull rod and at the same time provide a pressing force to the slotted limiting rod.

[0013] Preferably, a round hole is further provided on the convex platform of the limiting gasket, and the extrusion mandrel can pass through the round hole.

[0014] Preferably, the extrusion mandrel is concentric and coaxial with the slotted limiting rod.

[0015] Preferably, the base body has a mounting hole, and the bushing is arranged in the mounting hole; wherein, after the extrusion assembly is completed, the bushing is in interference fit with the mounting hole of the base body.

[0016] The beneficial technical effects of this application:

[0017] This assembly has good adaptability. The limiting gasket, the slotted limiting rod, and the pull rod are all separable, and are convenient to disassemble. According to the product type and structure, the components can be replaced at any time. The operation is simple and convenient, and the efficiency and installation quality are significantly improved. Compared with the prior art that requires two or more operators for fixing, the functional effect of this assembly is more remarkable. Because the positioning and fixing of the assembly can be completed by using the threaded connection between the extrusion mandrel and the pull rod, and one operator can complete the fixing of the assembly and carry out the extrusion strengthening implementation, the operation efficiency is significantly improved, and the labor cost and operation intensity are greatly reduced. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the limiting gasket provided by the embodiment of this application;

[0019] Figure 2 It is a schematic diagram of the slotted limiting rod provided by the embodiment of this application;

[0020] Figure 3 It is a schematic diagram of the assembly installation provided by the embodiment of this application;

[0021] Wherein, 1 - extrusion mandrel, 2 - base body, 3 - bushing, 4 - limiting gasket, 5 - slotted limiting rod, 6 - pull rod. Detailed Description of the Invention

[0022] Please refer to Figure 1 , a kind of assembly for extrusion strengthening to meet the installation depression of a straight bushing provided by this application, includes an extrusion mandrel 1, a limiting gasket 4, a slotted limiting rod 5, and a pull rod 6.

[0023] Among them, the limit gasket is provided with a convex step; the inner hole diameter of the limit gasket needs to achieve a clearance according to the maximum outer diameter of the extrusion mandrel; the inner hole of the slotted limit rod and the outer diameter of the non-working end of the extrusion mandrel are in clearance fit; the inner hole of the slotted limit rod and the outer diameter of the pull rod are in clearance fit; a 0.1-0.2 mm cross slot is provided at the small diameter end of the slotted limit rod; the above-mentioned limit gasket can have a selected step drop according to the requirements of the straight bushing; the clearance between the inner hole of the slotted limit rod and the outer diameter of the non-working end of the extrusion mandrel is 0.05-0.08 mm; the clearance between the inner hole of the slotted limit rod and the outer diameter of the pull rod is 0.05-0.08 mm.

[0024] Among them, the external thread at the tail end of the extrusion mandrel is connected to the internal thread at the head end of the pull rod; the extrusion mandrel, the pull rod and the drawing gun form an internal connection, and the limit gasket and the slotted limit rod form an external connection with the outer shape end face of the drawing gun. The internal connection is a motion mechanism, and the external connection is a limit mechanism.

[0025] The adaptability of this assembly is good. The limit gasket, the slotted limit rod and the pull rod are all separable, and the disassembly is convenient. According to the product type structure, the components can be replaced at any time. The operation is simple and convenient, and the efficiency and installation quality are significantly improved. Compared with the prior art that requires two or more operators for fixing, the functional effect of this assembly is more remarkable. Because the positioning and fixing of the assembly can be completed by using the threaded connection between the extrusion mandrel and the pull rod, one operator can complete the fixing of the assembly and carry out the extrusion strengthening implementation, and the operation efficiency is significantly improved, and the labor cost and operation intensity are greatly reduced.

[0026] Refer to the appendix Figure 2 and Figure 3 , a combination for extrusion strengthening to meet the installation depression of the straight bushing is provided. The bushing 3 is placed in the base body 2, and the extrusion mandrel is used to string the bushing, the limit gasket, the slotted limit rod. The extrusion mandrel and the pull rod are connected by threads to complete the stringing and fixing. The pull rod is connected to the hydraulic drawing gun, and the large head of the slotted connecting rod fits with the hydraulic drawing gun for hydraulic drawing. The extrusion mandrel extrudes and moves through the bushing and the limit gasket to reach the maximum elastic deformation state of the slotted connecting rod to complete the extrusion assembly process.

[0027] In the embodiment of the present application, the extrusion mandrel and the slotted limit rod of the assembly are concentric and coaxial. The slotted limit rod is matched with the large base surface of the hydraulic drawing gun to ensure that the extrusion movement direction is perpendicular and concentric to the plane of the base body, and ensure the stability and reliability of the extrusion process. After extrusion, the assembly is separated from the bushing and the base body without secondary disassembly and assembly. This assembly greatly reduces the assembly difficulty, improves the assembly efficiency, and reduces the personnel cost.

Claims

1. A combination for extrusion strengthening to meet the installation depression of a straight bushing, characterized in that, The bushing is arranged inside the base body, and the bushing is in clearance fit with the base body; The assembly includes: A limit gasket with a boss, and the boss is arranged inside the base body; A slotted limit rod with an inner hole, and one end of the slotted limit rod abuts against the limit gasket; An extrusion mandrel, one end of the extrusion mandrel is arranged inside the bushing, and the other end is arranged inside the inner hole; wherein, the diameter of the extrusion mandrel is larger than the inner diameter of the bushing; The extrusion mandrel can extrude and move through the bushing and the limit gasket to complete the extrusion assembly process.

2. The assembly according to claim 1, characterized in that, The other end of the extrusion mandrel is provided with a thread; The assembly further includes: A pull rod threadedly connected to the other end of the extrusion mandrel.

3. The assembly according to claim 2, wherein The assembly further includes: A hydraulic puller gun connected to the pull rod, and the hydraulic puller gun is used to provide a pulling force to the pull rod and at the same time provide a pressure to the slotted limit rod.

4. The assembly according to claim 3, wherein A round hole is further arranged on the boss of the limit gasket, and the extrusion mandrel can pass through the round hole.

5. The assembly according to claim 4, characterized in that, The extrusion mandrel and the slotted limit rod are concentric and coaxial.

6. The assembly according to claim 5, wherein, The base body has a mounting hole, and the bushing is arranged inside the mounting hole; wherein, after the extrusion assembly is completed, the bushing is in interference fit with the mounting hole of the base body.

Images