Aircraft oil filter disassembling and assembling tool

Abstract

The utility model discloses an aircraft oil filter disassembling and assembling tool which comprises two operating arms which are hinged in a crossed mode, one end of each operating arm is a handheld end, the other end of each operating arm is a clamping end, each clamping end is provided with a bent portion, the inner side face of each bent portion is an arc face, and an arc-shaped protruding portion is arranged on each arc face. The bending part is arranged at the clamping end, the filter element can be conveniently approached, the inner side surface of the bending part is the cambered surface and can be matched with the outer circular surface of the tail end of the filter element, and the arc-shaped convex part on the cambered surface can be clamped into the annular groove in the tail end of the filter element, so that the filter element can be effectively clamped, the filter element can be quickly taken out subsequently, the filter element is prevented from being damaged, and the service life of the filter element is prolonged. And the requirement on an operator is also reduced, and the structure is simple and effective.

Description

Technical Field

[0001] The utility model relates to the field of tools for aircraft maintenance, in particular to an aircraft oil filter disassembly and assembly tool. Background Art

[0002] The oil filter is the primary component for filtering solid particles, moisture, and other impurities from oil systems (hydraulic oil, lubricating oil, and fuel, etc.). Aircraft hydraulic systems, in particular, place higher demands on oil cleanliness. Timely cleaning of the hydraulic oil filter element is crucial to preventing flight-grade accidents, incidents, and malfunctions caused by oil system contamination. Some imported aircraft require the oil filter to be cleaned after every flight, resulting in extremely frequent oil filter disassembly and assembly. However, the structure of this oil filter differs significantly from that of domestic aircraft. The filter element and housing have a slight interference fit, and the filter element is completely buried within the fuselage, with only the tail exposed. Although ordinary needle-nose pliers can pull out this filter element, the clamping is not secure, making it difficult to apply force, and the contact area with the oil filter is subjected to high or uneven force. This can easily lead to the tail being pinched and metal shavings falling into the hydraulic system, posing a greater safety hazard. When the oil filter is blocked by other components (such as steel cables), the in-situ extraction of the filter element is even more time-consuming and labor-intensive. Due to the small maintenance space and poor accessibility of ordinary needle-nose pliers, two flat-blade knives are often used to lift the filter element from both sides, and then use needle-nose pliers to remove it. This method of disassembling the filter element is not only time-consuming and labor-intensive, but also very easy to slip and fall out of the hands, damaging the expensive filter element. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an aircraft oil filter disassembly and assembly tool which has a simple structure, good reliability and is convenient for clamping and removing the filter element.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An aircraft oil filter disassembly and assembly tool comprises two cross-hinged operating arms, one end of the operating arm is a hand-held end, and the other end of the operating arm is a clamping end. The clamping end is provided with a bent portion, the inner side surface of the bent portion is an arc surface, and the arc surface is provided with an arc-shaped convex portion.

[0006] As a further improvement of the above technical solution: the bending angle of the bending portion is α, 20°≤α≤65°.

[0007] As a further improvement of the above technical solution: α=45°.

[0008] As a further improvement of the above technical solution: the clamping end includes a first segment and a second segment, the handheld end, the first segment, the second segment and the bending portion are connected in sequence, and when the two first segments are close to each other, there is a gap between the two bending portions.

[0009] As a further improvement of the above technical solution: a groove is provided on the inner side surface of the first segment.

[0010] As a further improvement of the above technical solution: the groove is provided with concave and convex patterns.

[0011] As a further improvement of the above technical solution: the outer side surface of the first segment and the inner side surface of the second segment are connected through an oblique surface.

[0012] As a further improvement of the above technical solution: the outer side surface of the first segment and the inner side surface of the second segment are welded together.

[0013] As a further improvement of the above technical solution: an insulating sleeve is provided on the outer periphery of the handheld terminal.

[0014] As a further improvement of the above technical solution: a limiting protrusion is provided at one end of the insulating sleeve close to the hinge.

[0015] Compared with the prior art, the advantages of the present invention are: the aircraft oil filter disassembly and assembly tool disclosed in the present invention is provided with a bent portion at the clamping end, which facilitates access to the filter element; the inner side surface of the bent portion is an arc surface, which can cooperate with the outer circular surface of the tail end of the filter element; the arc-shaped convex portion on the arc surface can be stuck in the annular groove at the tail end of the filter element, thereby effectively clamping the filter element, and the filter element can be quickly removed later without damaging the filter element, which also reduces the requirements for the operator, and has a simple and effective structure.

[0016] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a three-dimensional structural diagram of an aircraft oil filter disassembly and assembly tool.

[0018] Figure 2 The utility model is a schematic diagram of the main structure of an aircraft oil filter disassembly and assembly tool.

[0019] Figure 3 The utility model is a side view structural diagram of an aircraft oil filter disassembly and assembly tool.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the second segment in the present utility model.

[0021] Figure 5 The utility model is a three-dimensional structural schematic diagram of the aircraft oil filter disassembly and assembly tool in use.

[0022] The numbers in the figure represent:

[0023] 1. Operating arm; 11. Hand-held end; 12. Clamping end; 121. First segment; 122. Second segment; 123. Groove; 13. Bend; 14. Arc surface; 15. Arc-shaped convex portion; 2. Insulating sleeve; 21. Limiting convex portion; 3. Filter element. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0026] In this utility model, unless otherwise specified or limited, the terms "assemble," "connect," "connect," "fix," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Figures 1 to 5 The present invention shows an embodiment of an aircraft oil filter disassembly and assembly tool. The aircraft oil filter disassembly and assembly tool of this embodiment comprises two cross-hinged operating arms 1, one end of the operating arm 1 is a handheld end 11, and the other end of the operating arm 1 is a clamping end 12. The clamping end 12 is provided with a bent portion 13. The inner side of the bent portion 13 (see Figure 2 , that is, the surface opposite to the two bending portions 13 is a curved surface 14, and an arc-shaped convex portion 15 is provided on the curved surface 14.

[0029] The aircraft oil filter disassembly and assembly tool of this embodiment is provided with a bent portion 13 at the clamping end 12 to facilitate access to the filter element 3. The inner side surface of the bent portion 13 is a curved surface 14, which can cooperate with the outer circular surface of the rear end of the filter element 3. The arc-shaped protrusion 15 on the curved surface 14 can be stuck into the annular groove at the rear end of the filter element 3, thereby effectively clamping the filter element 3. The filter element can be quickly removed later without damaging the filter element 3, which also reduces the requirements for the operator. The structure is simple and effective.

[0030] As a preferred embodiment, α=45°, which is convenient for the bending portion 13 to approach the filter element 3 and is also helpful for the operator to apply force to remove the filter element 3. Of course, in other embodiments, the bending angle α of the bending portion 13 can also be appropriately adjusted within the range of 20° to 65°, but

[0031] See Figure 2 Furthermore, in this embodiment, the clamping end 12 includes a first segment 121 and a second segment 122. The handheld end 11, the first segment 121, the second segment 122, and the bent portion 13 are sequentially connected. When the two first segments 121 are brought close together, a gap is formed between the two bent portions 13. When the two first segments 121 are brought close together, they can be used to cut single or multi-strand wires with relatively thin diameters, coil single-strand wires, and strip plastic insulation layers, acting as conventional pliers. At the same time, they can also provide a limiting effect for the two bent portions 13, preventing the two bent portions 13 from continuing to move close together, causing excessive force to clamp the filter element 3, and thus deformation of the expensive tail end of the filter element 3 (the tail end of the filter element 3 is made of metal, and once deformed, it is difficult to recover). The structure is reasonable and effective.

[0032] See Figure 1 and Figure 2 Furthermore, in this embodiment, a groove 123 is provided on the inner side of the first segment 121. The groove 123 can be used for positioning, facilitating cutting single or multi-strand wires with relatively thin wire diameters, winding single-strand wires, stripping plastic insulation layers, etc.

[0033] As a preferred embodiment, concave-convex patterns are provided in the groove 123. The concave-convex patterns can increase the roughness of the groove 123 and prevent single or multiple strands of wire from moving in the groove 123, resulting in a simple and reliable structure.

[0034] As a preferred embodiment, the outer side surface of the first segment 121 and the inner side surface of the second segment 122 are connected by an oblique surface, which is conducive to achieving a reliable connection between the first segment 121 and the second segment 122 and reducing the width of the clamping end 12 of the operating arm 1.

[0035] As a preferred embodiment, the outer side surface of the first segment 121 and the inner side surface of the second segment 122 are welded together, and the connection is firm and reliable.

[0036] Furthermore, in this embodiment, an insulating sleeve 2 is provided around the outer periphery of the handheld terminal 11. The insulating sleeve 2 can provide insulation protection for the handheld terminal 11, ensuring the safety of the operator. Preferably, the insulating sleeve 2 can be made of rubber, which has good insulation performance and good anti-slip effect.

[0037] Furthermore, in this embodiment, a limiting protrusion 21 is provided at one end of the insulating sleeve 2 near the hinge. The limiting protrusion 21 can prevent the operator's hand from sliding toward the hinge of the two operating arms 1 during use, making force application more convenient and further improving safety.

[0038] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into equivalent embodiments with equivalent variations. Therefore, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the scope of protection of the present invention.

Claims

1. An aircraft oil filter disassembly and assembly tool, characterized by: The invention comprises two cross-hinged operating arms (1), one end of the operating arm (1) is a hand-held end (11), and the other end of the operating arm (1) is a clamping end (12), the clamping end (12) is provided with a bending portion (13), the inner side surface of the bending portion (13) is an arc surface (14), which can cooperate with the outer circular surface of the tail end of the filter element (3), and the arc surface (14) is provided with an arc-shaped protrusion (15) which can be clamped into the annular groove at the tail end of the filter element (3).

2. The aircraft oil filter disassembly and assembly tool according to claim 1, characterized in that: The bending angle of the bending portion (13) is α, 20°≤α≤65°.

3. The aircraft oil filter disassembly and assembly tool according to claim 2, characterized in that: α＝45°。 4. The aircraft oil filter disassembly and assembly tool according to claim 1, characterized in that: The clamping end (12) comprises a first segment (121) and a second segment (122); the handheld end (11), the first segment (121), the second segment (122) and the bending portion (13) are connected in sequence; when the two first segments (121) are brought close together, a gap exists between the two bending portions (13).

5. The aircraft oil filter disassembly and assembly tool according to claim 4, characterized in that: The inner side surface of the first segment (121) is provided with a groove (123).

6. The aircraft oil filter disassembly and assembly tool according to claim 5, characterized in that: Concave and convex patterns are provided in the groove (123).

7. The aircraft oil filter disassembly and assembly tool according to claim 4, characterized in that: The outer side surface of the first segment (121) and the inner side surface of the second segment (122) are connected via an oblique surface.

8. The aircraft oil filter disassembly and assembly tool according to claim 7, characterized in that: The outer side surface of the first segment (121) and the inner side surface of the second segment (122) are welded together.

9. The aircraft oil filter disassembly and assembly tool according to any one of claims 1 to 8, characterized in that: The outer periphery of the handheld end (11) is provided with an insulating sleeve (2).

10. The aircraft oil filter disassembly and assembly tool according to claim 9, characterized in that: A limiting protrusion (21) is provided at one end of the insulating sleeve (2) close to the hinge.

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