Portable disassembling and assembling tool for machine bushing

Abstract

The utility model relates to the technical field of work fixtures, in particular to a portable disassembly and assembly tool for a machine bushing, the bushing is embedded in a base part, the tool comprises a hollow top pressing assembly, and the end part of the top pressing assembly is provided with a top pressing base body; the guide assembly is movably arranged in the jacking assembly, and a plurality of guide rods are arranged on the side, away from the jacking base body, of the guide assembly; the pressure applying assembly is arranged on the jacking base body and connected with the guiding assembly; wherein the ends of the guide rods abut against the inner diameter of the bush after being subjected to opening and closing angle adjustment, and the side, away from the jacking base body, of the guide assembly abuts against the end face of the bush. A plurality of guide rods are movably arranged on the guide assembly, so that the guide assembly can rotate along a movable part, the guide rods are uniformly distributed at intervals, the coaxiality in the moving process is effectively guaranteed, and the problem that a bush is damaged when the bush is disassembled and assembled by a disassembling and assembling tool in the prior art in a limited space is solved; and the lossless installation of the bushing is realized.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a portable tool for disassembling and assembling machine bushings. Background Technology

[0002] Among the many parts assembled in an aircraft, bushing installation is quite common. This involves pressing bushings made of steel, copper, or sometimes nylon into aluminum alloy base parts. The bushings are often shrunk by liquid nitrogen and then pressed into the base parts using a press. Using a press to install bushings results in stable quality and high efficiency. However, presses are mostly hydraulically powered, large machines, and have many limitations on the space required.

[0003] Existing bushing removal and installation methods mostly rely on large hydraulic presses, which are not portable and cannot perform secondary removal and installation of bushings already installed. Disassembly in confined spaces often involves hammering the bushings, which can easily damage the bushings and fuselage parts, resulting in poor coaxiality and other quality issues after bushing installation. Specifically, the bushing repair of the wing connection part of a certain type of civil aircraft needs to be carried out inside the wing box, with only enough space for a single person to operate. Traditional hydraulic equipment cannot enter, and when hammering is used for disassembly, problems such as bushing breakage and damage to the internal threads of the base material occur repeatedly, leading to extended maintenance cycles and increased costs.

[0004] Furthermore, the stringent standards for parts interchangeability and assembly precision in the aerospace manufacturing sector further highlight the technological gaps that existing technologies cannot meet. Utility Model Content

[0005] The main purpose of this utility model is to provide a portable tool for disassembling and assembling machine bushings, which aims to address the problem of bushing damage caused by existing disassembly and assembly tools when performing disassembly and assembly operations in a confined space.

[0006] To achieve the above objectives, this utility model provides a portable tool for disassembling and assembling machine bushings, wherein the bushing is embedded within a base part, and the tool includes:

[0007] A pressure assembly, wherein the pressure assembly is hollow inside and has a pressure base at its end;

[0008] A guide assembly is movably disposed within the top pressing assembly, and a plurality of guide rods are provided on the side away from the top pressing base;

[0009] A pressure-applying component is disposed on the top pressure base and connected to the guide component;

[0010] Among them, the ends of several guide rods are adjusted to abut against the inner diameter of the bushing after opening and closing angle, and the side of the guide assembly away from the top pressure base abuts against the end face of the bushing.

[0011] Optionally, the guide assembly includes a guide base, the end of which is provided with a plurality of guide grooves, and the guide rod is movably disposed within the guide grooves.

[0012] Optionally, the end of the guide rod is provided with an adjusting rod, and the outer periphery of the pressing assembly is provided with an adjusting groove, so that the opening and closing angle of the end of the guide rod can be adjusted by moving the adjusting rod in the adjusting groove.

[0013] Optionally, the guide assembly is provided with a threaded rod on the side near the top pressure base.

[0014] Optionally, the pressure application assembly includes a rotating cylinder that matches the threaded rod. The rotating cylinder is rotatably disposed with the pressure base. When the rotating cylinder rotates, the position of the guide base within the pressure application assembly is adjusted by the threaded rod.

[0015] Optionally, the middle part of the guide rod is hinged in the guide groove by a pin.

[0016] Optionally, the end of the guide rod is provided with a disassembly part that matches the end face of the bushing.

[0017] Optionally, washers are provided on the outer periphery of some of the guide rods.

[0018] Optionally, the outer periphery of the rotating cylinder is hinged with several rotating rods.

[0019] Optionally, the outer periphery of the top pressing assembly is provided with a groove for accommodating the swivel rod.

[0020] This utility model proposes a portable bushing disassembly and assembly tool. By setting a guide component inside the top pressing assembly, the guide component can slide within the top pressing assembly. Several guide rods movably set on the guide component allow it to rotate along the movable part. The guide rods are evenly spaced, which effectively ensures coaxiality during movement. This solves the problem of bushing damage caused by existing disassembly and assembly tools when performing disassembly and assembly operations in a limited space, and realizes non-destructive installation of bushings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model.

[0023] Figure label:

[0024] 1-Bushing, 2-Base component, 3-Pressure assembly, 4-Guide assembly, 5-Pressure application assembly;

[0025] 31-Top pressure matrix;

[0026] 41-Guide rod, 42-Guide base, 43-Guide groove, 44-Adjusting rod, 45-Adjusting groove, 46-Threaded rod, 47-Disassembly / assembly part, 48-Washer;

[0027] 51-Spinning cylinder, 52-Spinning rod, 53-Spinning groove.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] Example:

[0034] As attached Figure 1 With appendix Figure 2 As shown, this embodiment provides a portable tool for disassembling and assembling a machine bushing 1. The bushing 1 is embedded in the base part 2. The tool includes:

[0035] The top pressure component 3 is hollow inside and has a top pressure base 31 at its end;

[0036] The guide component 4 is movably disposed within the top pressing component 3, and a plurality of guide rods 41 are provided on the side away from the top pressing base 31;

[0037] The pressure application component 5 is disposed on the top pressure base 31 and connected to the guide component 4;

[0038] Among them, the ends of several guide rods 41 are adjusted to open and close at an angle and then abut against the inner diameter of the bushing 1, and the side of the guide assembly 4 away from the top pressing base 31 abuts against the end face of the bushing 1.

[0039] It should be noted that the existing methods for removing and installing bushing 1 mostly rely on large hydraulic presses, which are not very portable and cannot achieve secondary disassembly and reassembly of the already installed bushing 1. Disassembly in confined spaces often involves using a hammer to knock the bushing 1 apart, which can easily cause damage to the bushing 1 and machine parts, as well as quality problems such as poor coaxiality after the bushing 1 is installed.

[0040] To address the aforementioned issues, this embodiment provides a portable tool for disassembling and assembling machine bushings 1. A guide component 4 is installed within the pressing assembly 3, allowing the guide component 4 to slide within the pressing assembly 3. Several guide rods 41 movably mounted on the guide component 4 allow it to rotate along the movable portion. The guide rods 41 are evenly spaced, effectively ensuring coaxiality during movement. Furthermore, the guide rods 41 are joined together to form a columnar structure with gaps, and abut against the inner diameter of the bushing 1 as the guide component 4 moves. This allows the guide rods to be reduced in size when the bushing 1 needs to be disassembled. The outer diameter of guide rod 41 abuts against the inner diameter of bushing 1. Then, the pressure assembly 5 moves guide assembly 4 circumferentially, separating bushing 1 from base part 2. During installation, the outer diameter of guide rod 41 is reduced to abut against the inner diameter of bushing 1, and the protruding part of guide rod 41 is placed in the mounting hole of base part 2. The pressure assembly 5 moves guide assembly 4 towards base part 2, and the side of guide assembly 4 away from the pressing base 31 presses against bushing 1, forcing bushing 1 to be installed in the mounting hole. After installation, guide rod 41 is retracted and removed from the inner diameter of bushing 1. This solves the problem of damage to bushing 1 caused by disassembly and assembly tools in confined spaces, achieving non-destructive installation of bushing 1.

[0041] In some embodiments, the guide component 4 is a cylindrical structure.

[0042] In some embodiments, the top pressure base 31 is a protruding structure that is detachably connected to the end face of the guide assembly 4.

[0043] In some embodiments, the pressure application component 5 is disposed on the driving structure of the top pressure base 31, such as a scissor jack structure, a controllable gas spring, a hydraulic telescopic rod, etc.

[0044] In some embodiments, the guide rods 41 are arranged in a circular array with respect to the axis of the guide assembly 4.

[0045] In this embodiment, the guide assembly 4 includes a guide base 42, and a plurality of guide grooves 43 are provided at the end of the guide base 42, and the guide rod 41 is movably disposed in the guide grooves 43.

[0046] The multi-segment guide rod 41, in conjunction with a hinged adjustment mechanism, utilizes a guide groove 43 at the end of the guide base 42 and a central pin hinge design to create a variable-diameter umbrella-shaped structure for varying the opening and closing degree between the ends of the guide rod 41. During operation, the adjusting rod 44 slides along the adjusting groove 45 on the outer periphery of the top-pressing assembly 3, driving the end of the guide rod 41 to achieve radial opening and closing angle adjustment within a multi-angle range. This precisely matches bushings 1 with different inner diameters, effectively preventing bushing 1 deformation caused by localized stress concentration. During disassembly, the lever system converts the axial thrust generated by the pressure application assembly 5 into a uniform circumferential gripping force. Even if the bushing 1 adheres to the base, the linear slide rail provided by the top-pressing assembly 3 cylinder maintains the bushing 1's exit trajectory offset. During installation, the tapered disassembly / removal part 47 at the front end of the guide rod 41 guides the bushing 1 to precisely embed into the base mounting hole.

[0047] In some embodiments, the guide groove 43 is opened along the axial direction of the guide assembly 4, and the number of openings must match the number of guide rods 41.

[0048] In this embodiment, an adjusting rod 44 is provided at the end of the guide rod 41, and an adjusting groove 45 is provided on the outer periphery of the pressing assembly 3. The opening and closing angle of the end of the guide rod 41 is adjusted by moving the adjusting rod 44 in the adjusting groove 45.

[0049] It is understandable that the cylindrical adjusting rod 44, vertically fixed to the tail end of the guide rod 41, is embedded in the specially designed curved adjusting groove 45 on the outer periphery of the top pressing assembly 3, forming a sliding pair mechanism. The adjusting groove 45 preferably adopts a gradually changing curvature design. When the guide assembly 4 is rotated, the adjusting rod 44 slides along the groove, generating a radial displacement difference. This displacement is converted into lever motion through the hinge fulcrum in the middle of the guide rod 41, driving the front disassembly and assembly part 47 to achieve radial opening and closing: allowing the opening and closing angle of the end of the guide rod 41 to be continuously adjusted. It is also understandable that the above structure breaks through the limitations of traditional tooling relying on external tools; single-handed rotation operation can adapt to the inner diameter of bushings 1 of multiple sizes. Furthermore, through the synchronous linkage of multiple guide rods 41, the disassembly and assembly part 47 forms a load-bearing annulus, eliminating the elliptical deformation of the bushing 1 caused by the hammering method at its source.

[0050] In this embodiment, a threaded rod 46 is provided on the side of the guide assembly 4 near the pressure base 31. The threaded rod 46 at the end of the guide assembly 4 and the rotating cylinder 51 of the pressure application assembly 5 form a helical transmission system, which converts rotational kinetic energy into precise axial thrust. When the rotating cylinder 51 is rotated, the threaded rod 46 moves linearly along the hole of the pressure base 31, driving the entire guide assembly 4 to move smoothly forward and backward within the pressure chamber. This purely mechanical transmission method eliminates the complex piping and power unit of traditional hydraulic systems. In the disassembly operation of the rudder bushing 1 of a certain type of aircraft, only manual rotation is needed to generate a uniform and continuous axial load, completely eliminating the impact damage caused by hammering. Furthermore, through the self-locking characteristics of the threaded pair, the tool automatically maintains a preset pressure state during the pressure application process, avoiding the pressure decay problem common in hydraulic tools.

[0051] In this embodiment, the pressure application component 5 includes a rotating cylinder 51 that matches the threaded rod 46. The rotating cylinder 51 is rotatably mounted to the pressure base 31. When the rotating cylinder 51 rotates, the position of the guide base 42 within the pressure application component 3 is adjusted via the threaded rod 46. The rotating cylinder 51 and the pressure base 31 are connected by a precision bearing, and the inner wall is machined with a trapezoidal thread that matches the threaded rod 46 of the guide component 4. When the rotating cylinder 51 is manually rotated, the threaded pair converts the rotational motion into the axial linear motion of the guide base 42, forming a stable mechanical pressure output. When operating in confined spaces, this design avoids the risk of hydraulic oil leakage and allows for precise control of the axial load during the assembly and disassembly of the bushing 1.

[0052] In this embodiment, the middle part of the guide rod 41 is hinged within the guide groove 43 via a pin. The guide rod 41 forms a double-fulcrum lever structure within the guide groove 43 via a hardened steel pin, with the hinge point dividing the rod into a force-bearing section and an adjustment section. When the pressure-applying component 5 drives the guide base 42 to move axially, the pin hinge allows the guide rod 41 to rotate precisely around the fulcrum, causing the disassembly / assembly part 47 at the end to simultaneously generate radial displacement. This effectively disperses contact stress, avoiding the local crushing phenomenon caused by three-point contact in traditional three-jaw tools. Especially when performing non-destructive disassembly / assembly of the nylon bushing 1, the contact surface pressure is reduced to below the material's yield strength, significantly reducing the risk of scratches and deformation.

[0053] In this embodiment, the end of the guide rod 41 is provided with a disassembly / assembly part 47 that matches the end face of the bushing 1. It is understood that the disassembly / assembly part 47 matches the end face of the bushing 1, and the disassembly / assembly part 47 adopts a composite structure of contoured curved surface and involute tooth profile. Its working surface precisely matches the annular groove and chamfer features at the end of the bushing 1. When the guide rod 41 is radially extended, the tapered guide surface of the disassembly / assembly part 47 automatically fits against the end edge of the bushing 1, forming continuous surface contact support; while the internal multi-stage stepped teeth are embedded in the process groove of the end face of the bushing 1, establishing a mechanical interlock.

[0054] In this embodiment, washers 48 are provided on the outer periphery of several of the guide rods 41. In some embodiments, the washers 48 are constructed of multi-layer composite materials, with an inner layer of high-strength alloy support ring and an outer layer of engineered elastomer material, forming a contact interface that combines rigidity and flexibility. When the guide rods 41 are radially extended, the outer layer of the elastomer adapts to the wall of the hole in the base part 2 through deformation, transforming the traditional sliding friction between metals into a viscoelastic contact between the elastomer and the base.

[0055] In this embodiment, a plurality of rotating rods 52 are hinged to the outer periphery of the rotating cylinder 51.

[0056] In this embodiment, the outer periphery of the top pressing assembly 3 is provided with a swivel groove 53 for accommodating the swivel rod 52.

[0057] Understandably, the hinged design of the rotating rod 52 allows it to fold along the hinge point, enabling the assembly and disassembly of the bushing 1 within a limited space. Specifically, the rotating rod 52 on the outer periphery of the rotating cylinder 51 employs a multi-axis hinge structure, which can be completely folded and stored within the arc-shaped groove 53 on the side wall of the top pressure assembly 3 in the non-working state, forming a compact cylindrical profile. When force is required, the rotating rod 52 unfolds radially to form a force-saving lever system, and its unique two-degree-of-freedom hinge allows the operator to adjust the unfolding angle of the rotating rod 52 according to the working space configuration.

[0058] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A portable tool for disassembling and assembling machine bushings, characterized in that, The bushing is embedded within the base part, and the tool includes: A pressure assembly, wherein the pressure assembly is hollow inside and has a pressure base at its end; A guide assembly is movably disposed within the top pressing assembly, and a plurality of guide rods are provided on the side away from the top pressing base; A pressure-applying component is disposed on the top pressure base and connected to the guide component; Among them, the ends of several guide rods are adjusted to abut against the inner diameter of the bushing after opening and closing angle, and the side of the guide assembly away from the top pressure base abuts against the end face of the bushing.

2. The portable machine bushing disassembly and assembly tool as described in claim 1, characterized in that, The guiding assembly includes a guiding base, and a plurality of guiding grooves are provided at the ends of the guiding base. The guiding rod is movably disposed within the guiding grooves.

3. The portable tool for disassembling and assembling machine bushings as described in claim 2, characterized in that, An adjusting rod is provided at the end of the guide rod, and an adjusting groove is provided on the outer periphery of the top pressing assembly. The opening and closing angle of the end of the guide rod is adjusted by moving the adjusting rod in the adjusting groove.

4. The portable machine bushing disassembly and assembly tool as described in claim 2, characterized in that, The guide assembly has a threaded rod on the side near the top pressure base.

5. A portable tool for disassembling and assembling machine bushings as described in claim 4, characterized in that, The pressure application assembly includes a rotating cylinder that matches the threaded rod. The rotating cylinder is rotatably disposed with the pressure base. When the rotating cylinder rotates, the position of the guide base within the pressure application assembly is adjusted by the threaded rod.

6. A portable tool for disassembling and assembling machine bushings as described in claim 2, characterized in that, The middle part of the guide rod is hinged in the guide groove by a pin.

7. A portable tool for disassembling and assembling machine bushings as described in claim 1, characterized in that, The end of the guide rod is provided with a disassembly part that matches the end face of the bushing.

8. A portable tool for disassembling and assembling machine bushings as described in claim 7, characterized in that, Washers are provided on the outer periphery of several of the guide rods.

9. A portable tool for disassembling and assembling machine bushings as described in claim 5, characterized in that, The outer circumference of the rotating cylinder is hinged with several rotating rods.

10. A portable tool for disassembling and assembling machine bushings as described in claim 9, characterized in that, The outer periphery of the top pressure assembly is provided with a groove for accommodating the swivel rod.

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