Disassembling and assembling tool for anti-disengaging clamping ring of center plunger rod of electric oil pump of aircraft engine

Abstract

An aircraft engine electric oil pump center plunger rod anti-disengaging clamping ring disassembling and assembling tool comprises a base, a cylinder body connecting lug and a pair of guide rods are arranged on the base, a lifting frame is arranged on the guide rods in a sliding and sleeving mode, a disassembling and assembling mechanism is arranged in the center of the lifting frame in a hanging mode, and the disassembling and assembling mechanism is located over the cylinder body connecting lug. The center plunger rod is sleeved with the disassembling and assembling mechanism, and the disassembling and assembling mechanism is in threaded connection with the center plunger rod. The disassembling and assembling mechanism comprises a lifting cylinder, the lower end of the lifting cylinder extends into the engine electric oil pump, the center plunger rod is sleeved with the lifting cylinder, and the lifting cylinder is installed on the lifting frame in a suspended mode and synchronously ascends and descends along with the lifting frame. A cutter mounting base is arranged at the lower end of the lifting cylinder, and a cutter assembly is detachably mounted on the cutter mounting base. The top face of the lifting cylinder is connected with a driving nut (54), and the driving nut (54) is in threaded connection with threads on the center plunger rod. According to the tool, the anti-disengaging clamping ring of the center plunger rod of the electric oil pump of the engine can be rapidly disassembled and assembled, positioning is accurate, operation is easy, disassembling and assembling precision is high, and efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft ground maintenance equipment, in particular to a disassembly and assembly tool for an anti-dropping clamp ring of a central plunger rod of an electric oil pump of an aircraft engine. Background Art

[0002] Please refer to the instruction manual Figure 1 When the central plunger rod 300 of the aircraft engine electric oil pump 200 is installed, an anti-dropout clamp ring 400 needs to be installed to prevent the plunger rod 300 from accidentally rotating during operation in a high-vibration environment, thereby causing the plunger rod 300 to fall out of the engine electric oil pump 200. The bottom end of the plunger rod 300 is assembled into the cylinder body of the engine electric oil pump 200 through a common threaded structure. The anti-dropout clamp ring 400 needs to be clamped at the threaded connection at the bottom end of the plunger rod 300.

[0003] Now, in the process of installing the central plunger rod 300 and the anti-dropping clamp ring 400 of the engine electric oil pump 200 in actual working conditions, there are the following problems:

[0004] 1) Installation process: The new anti-slipping clamp 400 is made of high-carbon alloy steel and is a complete circular ring. In actual installation, after the plunger rod 300 and the anti-slipping clamp 400 are installed in place, the circumferential walls on both sides of the anti-slipping clamp 400 need to be radially squeezed and deformed inward so that the circumferential walls on both sides of the anti-slipping clamp 400 form a flat tongue, which is convenient for adapting to the planes on both sides of the circumferential walls of the mounting boss of the plunger rod 300, so that the anti-slipping clamp 400 clamps the plunger rod 300 from both sides to prevent the plunger rod 300 from rotating.

[0005] However, there are three difficulties in the extrusion deformation process of the anti-dropping clamp 400:

[0006] First, the outer cylinder of the engine electric oil pump 200 is very long and deep, reaching a depth of 22 inches, and general tools (such as screwdrivers, etc.) cannot be inserted into place;

[0007] Secondly, the outer diameter of the anti-dropping clamp 400 is less than 20 mm, and the extrusion deformation is only 3 mm. Even if a pointed tool is inserted, it is impossible to pinch and squeeze the high-hardness anti-dropping clamp 400 in a narrow space.

[0008] Third, when the cylinder body of the aircraft engine electric oil pump 200 is working, its inner wall must be kept in an intact sealed state. When squeezing the anti-dropping clamp ring 400 with ordinary tools, there is no way to ensure that the inner wall of the cylinder body of the engine electric oil pump 200 will not be pushed against due to excessive force, which may easily cause damage to the inner wall of the cylinder body of the engine electric oil pump 200.

[0009] 2) Disassembly process: Disassembly is the reverse process of installation. The deformed part of the anti-dropping clamp 400 that was originally squeezed and deformed needs to be basically restored before it can be successfully removed. However, since the old anti-dropping clamp 400 will be oxidized and easily broken after long-term use, the following problems also exist in the actual removal process:

[0010] First, the cylinder of the engine electric oil pump 200 is deep and large, and ordinary tools cannot enter and approach the installation position;

[0011] Secondly, there is only a gap of less than 1 mm between the anti-dropping clamp ring 400 and the plunger rod 300 after being squeezed and deformed, which is difficult to be separated and restored with conventional tools;

[0012] Third, in previous work, people basically rely on brute force to pry the deformed part of the anti-dropping clamp 400 with a thin and pointed crowbar, which is easy to damage the inner wall. Part of the anti-dropping clamp 400 will be easily broken, and the fragments are not easy to be safely removed. Utility Model Content

[0013] In view of the deficiencies in the prior art, the utility model provides a disassembly and assembly tool for an anti-dropping clamp ring of a central plunger rod of an electric oil pump of an aircraft engine, so as to overcome the deficiencies in the prior art.

[0014] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0015] A tool for disassembling and assembling an anti-dropping clamp ring of a central plunger rod of an electric oil pump of an aircraft engine, comprising a base, a cylinder lug is arranged in the center of the base, a pair of guide rods are symmetrically erected on both sides of the cylinder lug on the base, a lifting frame is slidingly sleeved on the guide rods, the two ends of the lifting frame are respectively connected to the guide rods, a disassembling and assembling mechanism is suspended in the center of the lifting frame, and the disassembling and assembling mechanism is located directly above the cylinder lug;

[0016] The upper part of the disassembly and assembly mechanism is fixed on the lifting frame, the lower part of the disassembly and assembly mechanism extends into the engine electric oil pump, and the disassembly and assembly mechanism is sleeved on the central plunger rod, and the disassembly and assembly mechanism is threadedly connected with the upper end of the central plunger rod.

[0017] Furthermore, the disassembly and assembly mechanism includes a lifting cylinder, the lower end of which extends into the engine electric oil pump, and the lifting cylinder is sleeved on the central plunger rod. The lifting cylinder is suspended on the lifting frame and rises and falls synchronously with the lifting frame.

[0018] Furthermore, a tool mounting seat is provided at the lower end of the lifting cylinder, and a tool assembly is detachably mounted on the tool mounting seat.

[0019] Furthermore, the top surface of the lifting cylinder is connected to a driving nut, and the driving nut is threadedly connected to the thread on the upper end of the central plunger rod.

[0020] Furthermore, the tool assembly includes an installation tool and a disassembly tool; the installation tool and the disassembly tool are used alternately, and the tool heads of the installation tool and the disassembly tool are both facing the anti-dropping clamping ring.

[0021] Preferably, the tool head of the mounting tool is a double-bevel pointed head.

[0022] Preferably, the tool head of the disassembly tool is a single-bevel pointed head.

[0023] Furthermore, the disassembly and assembly mechanism, the central plunger rod and the engine electric oil pump are coaxially installed.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1) The present invention provides a tool for disassembling and assembling an anti-dropping clamp of the center plunger rod of an aircraft engine electric oil pump, which can quickly disassemble and assemble the anti-dropping clamp of the center plunger rod of the engine electric oil pump, with accurate positioning, simple operation, high disassembly and assembly precision and high efficiency.

[0026] 2) In this case, a tool for disassembling and assembling an anti-slip ring of the center plunger rod of an aircraft engine electric oil pump uses a guide rod to guide the lifting trajectory of the lifting frame, so that the tool head of the tool assembly and the anti-slip ring are accurately aligned, effectively improving the disassembly and assembly accuracy of the anti-slip ring.

[0027] 3) In this case, a tool for disassembling and assembling an anti-dropping clamp ring of a central plunger rod of an aircraft engine electric oil pump is provided with a cylinder body ear to ensure that the aircraft engine electric oil pump always remains in an upright state, further improving the disassembly and assembly accuracy of the anti-dropping clamp ring.

[0028] 4) In this case, a tool for disassembling and assembling an anti-dropping retaining ring of the center plunger rod of an aircraft engine electric oil pump is provided with a detachable and replaceable tool assembly, so that only the tool assembly (installation tool or removal tool) needs to be replaced in a set of tools to complete the installation or removal of the anti-dropping retaining ring. The tool is cleverly designed, simple to operate, low in production cost, and saves production materials.

[0029] In order to more clearly understand the present invention, the following will describe the preferred implementation modes of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the assembly of the anti-dropping clamp ring of the central plunger rod of the electric oil pump of an aircraft engine in the background technology;

[0031] Figure 2 , Figure 3 This is a reference diagram of the use state of the utility model;

[0032] Figure 4 It is a schematic diagram of the structure of the utility model;

[0033] Figure 5 , Figure 6 , Figure 7 It is a structural schematic diagram of the disassembly and assembly mechanism (5) in the utility model.

[0034] Figure ID:

[0035] 1-base, 2-cylinder lug, 3-guide rod, 4-lifting frame, 5-disassembly and assembly mechanism; 51-lifting cylinder, 52-tool mounting seat, 531-installing tool, 532-disassembling tool, 54-driving nut; 200-engine electric oil pump, 300-plunger rod, 400-anti-dropping clamping ring. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0038] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0039] Please also see Figure 1-7The utility model provides a disassembly and assembly tool for the anti-dropping clamp ring of the central plunger rod of an electric oil pump of an aircraft engine, comprising a base (1), a cylinder body ear (2) being arranged at the center of the base (1), a pair of guide rods (3) being symmetrically erected on both sides of the cylinder body ear (2) on the base (1), a lifting frame (4) being slidingly sleeved on the guide rods (3), two ends of the lifting frame (4) being respectively connected to the guide rods (3), a disassembly and assembly mechanism (5) being suspended at the center of the lifting frame (4), and the disassembly and assembly mechanism (5) being located directly above the cylinder body ear (2). The cylinder lug (2) is used to dock with and fix the lug at the bottom end of the aircraft engine electric oil pump 200, so that the aircraft engine electric oil pump 200 is kept upright between the two guide rods (3); the upper part of the disassembly and assembly mechanism (5) is fixed on the lifting frame (4), the lower part of the disassembly and assembly mechanism (5) extends into the engine electric oil pump 200, and the disassembly and assembly mechanism (5) is sleeved on the central plunger rod 300; the lower end of the central plunger rod 300 is threadedly connected to the engine electric oil pump 200, and the upper end of the central plunger rod 300 is threadedly connected to the disassembly and assembly mechanism (5); the disassembly and assembly mechanism (5), the central plunger rod 300 and the engine electric oil pump 200 are coaxially installed, so that under the action of the nut of the disassembly and assembly mechanism (5), the disassembly and assembly mechanism (5) can be raised and lowered in the engine electric oil pump 200 and on the central plunger rod 300.

[0040] The disassembly and assembly mechanism (5) comprises a lifting cylinder (51), the lower end of which extends into the engine electric oil pump 200, and the lifting cylinder (51) is sleeved on the central plunger rod 300. The lifting cylinder (51) is suspended on the lifting frame (4) and rises and falls synchronously with the lifting frame (4). A tool mounting seat (52) is arranged at the lower end of the lifting cylinder (51), and a tool assembly is detachably mounted on the tool mounting seat (52); the top surface of the lifting cylinder (51) is connected to a driving nut (54), and the driving nut (54) is threadedly connected to the thread at the upper end of the central plunger rod 300.

[0041] Furthermore, the tool assembly comprises an installation tool (531) and a disassembly tool (532); the installation tool (531) and the disassembly tool (532) are used alternately, and the tool heads of the installation tool (531) and the disassembly tool (532) are both facing the anti-slip retaining ring 400; the installation tool (531) is used when installing the anti-slip retaining ring 400, and the installation tool (531) is replaced by the disassembly tool (532) when disassembling the anti-slip retaining ring 400.

[0042] Furthermore, the tool head of the installation tool (531) is a double-beveled pointed head; and the tool head of the disassembly tool (532) is a single-beveled pointed head.

[0043] Working principle:

[0044] During the installation process of the anti-dropping clamp ring 400, the driving nut 54 drives the lifting cylinder to move downward with the plunger rod 300 as the axis, and the inclined surface of the installation cutter head 531 presses the two side edges of the anti-dropping clamp ring 400 inward, so that the anti-dropping clamp ring 400 is deformed and clamps the plunger rod 300, thereby achieving the purpose of preventing the anti-dropping;

[0045] During the disassembly process of the anti-slip snap ring 400, the driving nut 54 drives the lifting cylinder downward with the plunger rod 300 as the axis, and the inclined surface of the disassembly tool head 532 squeezes the two side edges of the originally deformed anti-slip snap ring 400 outward, so that the anti-slip snap ring 400 is deformed and loosened from the stuck plunger rod 300, thereby achieving the purpose of disassembly.

[0046] Compared with the prior art, the present invention provides a tool for disassembling and assembling an anti-detachment clamp of the center plunger rod of an aircraft engine electric oil pump, which can quickly disassemble and assemble the anti-detachment clamp of the center plunger rod of the engine electric oil pump, with accurate positioning, simple operation, high disassembly and assembly precision and high efficiency.

[0047] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A tool for disassembling and assembling a central plunger rod anti-dropping clamp of an electric oil pump for an aircraft engine, comprising a base (1), characterized in that: A cylinder body ear (2) is arranged at the center of the base (1), a pair of guide rods (3) are symmetrically arranged on both sides of the cylinder body ear (2) on the base (1), a lifting frame (4) is slidably sleeved on the guide rods (3), the two ends of the lifting frame (4) are respectively connected to the guide rods (3), and a disassembly mechanism (5) is suspended in the center of the lifting frame (4), and the disassembly mechanism (5) is located directly above the cylinder body ear (2); The upper part of the disassembly and assembly mechanism (5) is fixed on the lifting frame (4), the lower part of the disassembly and assembly mechanism (5) extends into the engine electric oil pump (200), and the disassembly and assembly mechanism (5) is sleeved on the central plunger rod (300), and the disassembly and assembly mechanism (5) is threadedly connected to the upper end of the central plunger rod (300).

2. The tool for disassembling and assembling the anti-dropping clamp ring of the central plunger rod of an electric oil pump for an aircraft engine according to claim 1, characterized in that: The disassembly and assembly mechanism (5) comprises a lifting cylinder (51), the lower end of which extends into the engine electric oil pump (200), and the lifting cylinder (51) is sleeved on the central plunger rod (300). The lifting cylinder (51) is suspended on the lifting frame (4) and rises and falls synchronously with the lifting frame (4).

3. The tool for disassembling and assembling the anti-dropping clamp ring of the central plunger rod of an electric oil pump for an aircraft engine according to claim 2, characterized in that: A tool mounting seat (52) is provided at the lower end of the lifting cylinder (51), and a tool assembly is detachably mounted on the tool mounting seat (52).

4. The tool for disassembling and assembling the anti-dropping clamp ring of the central plunger rod of an electric oil pump for an aircraft engine according to claim 3, characterized in that: The top surface of the lifting cylinder (51) is connected to a driving nut (54), and the driving nut (54) is threadedly connected to the thread on the upper end of the central plunger rod (300).

5. The tool for disassembling and assembling the anti-dropping clamp ring of the central plunger rod of an electric oil pump for an aircraft engine according to claim 4, characterized in that: The tool assembly comprises an installation tool (531) and a disassembly tool (532); the installation tool (531) and the disassembly tool (532) are used in rotation, and the tool heads of the installation tool (531) and the disassembly tool (532) are both facing the anti-dropping clamping ring (400).

6. The tool for disassembling and assembling the anti-dropping clamp ring of the central plunger rod of an electric oil pump for an aircraft engine according to claim 5, characterized in that: The tool head of the mounting tool (531) is a double-bevel pointed head.

7. The tool for disassembling and assembling the anti-dropping clamp ring of the central plunger rod of an electric oil pump for an aircraft engine according to claim 5, characterized in that: The tool head of the disassembly tool (532) is a single-bevel pointed head.

8. The tool for disassembling and assembling the anti-dropping clamp ring of the central plunger rod of an electric oil pump for an aircraft engine according to claim 5, characterized in that: The disassembly and assembly mechanism (5), the central plunger rod (300) and the engine electric oil pump (200) are coaxially mounted.

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