A spin-on filter assembly / disassembly tool

Abstract

This utility model discloses a spin-on filter assembly and disassembly tool, relating to the field of filter assembly and disassembly technology, and applicable to the installation and disassembly of spin-on filters in aerospace hydraulic systems. The tool includes a handle, a clamp, and a clamp bushing. The clamp is a ring-shaped metal structure with a vertical protrusion on its inner circumference. The clamp bushing, located inside the clamp, is 3D printed from rubber material and has a first vertical protrusion on its inner circumference, and a groove structure formed on its outer circumference to mate with a second protrusion, achieving anti-rotation positioning and preventing direct contact between metal parts and the filter surface. The handle is connected to the clamp by welding or thread, and its outer surface has a knurled texture to improve grip stability. This tool has advantages such as simple structure, quick assembly, and strong adaptability, effectively avoiding scratches or indentations on the filter housing during assembly and disassembly, reducing maintenance risks, and improving on-site operation efficiency. It is particularly suitable for applications with high reliability requirements.

Description

Technical Field

[0001] This utility model relates to the field of filter assembly and disassembly technology, specifically a screw-on filter assembly and disassembly tool. Background Technology

[0002] In the routine maintenance of aerospace hydraulic systems, spin-on filters are widely used for precision filtration of high-pressure oils, and their replacement frequency is relatively high. Because their structure typically uses a threaded screw-on installation, external tools are required for tightening and disassembly. Therefore, developing efficient, safe, and non-damaging specialized disassembly and assembly tools is crucial for ensuring maintenance efficiency and equipment integrity. Currently, engineers mainly rely on traditional disassembly and assembly tools, such as cup-type filter element wrenches, chain pliers, steel band wrenches, and three-jaw tools.

[0003] The aforementioned tools revealed several shortcomings during use. First, most tools directly contact the filter housing via metal components, making them prone to scratching or denting the filter surface under high torque operation, affecting airtightness or reusability. Second, different types of filters vary significantly in size, and traditional tools are often designed for specific models, lacking versatility and requiring frequent tool replacements. Third, some tools are complex to operate; for example, steel belt tools require wrapping, clamping, and then rotating, while three-jaw tools require adjusting the distance between the jaw arms, demanding a high level of operator skill and significantly impacting on-site maintenance efficiency.

[0004] For example, patent document CN205674115U discloses a filter element disassembly and assembly tool. This tool adopts a mechanical structure consisting of a "U"-shaped fastener, a semi-circular operating rod, a pressure plate, and a belt. The outer wall of the filter element is clamped by the tension of the belt and the teeth of the pressure plate. However, this structure has many components and a complex connection method, which is not conducive to rapid on-site deployment. At the same time, the belt is made of metal or high-strength material, which can easily damage the surface of the filter element during forceful disassembly and assembly, and lacks a buffer protection mechanism. Although this solution has a certain degree of adaptability and anti-slip performance, it still has key shortcomings such as insufficient versatility, poor protection, and inconvenient operation, making it difficult to meet the needs of the aerospace field for highly reliable and efficient maintenance operations. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a spin-on filter assembly and disassembly tool. This tool is superior to the existing technology in terms of structural safety, ease of assembly, equipment protection and multi-model compatibility. It significantly improves the assembly and disassembly efficiency of spin-on filters and reduces the cost of tool replacement and equipment maintenance. It is especially suitable for application scenarios such as aerospace hydraulic systems where maintenance reliability and parts integrity are required, and can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a spin-on filter assembly and disassembly tool, comprising a handle (2), a clamp (1) and a clamp bushing (3). The clamp (1) is a ring-shaped metal structure. One end of the clamp (1) is fixedly connected to the handle (2). A vertical protrusion (8) is provided on the inner circumference of the clamp (1). The clamp bushing (3) is located on the inner side of the clamp (1). The clamp bushing (3) prevents the metal tool from damaging the surface of the spin-on filter during installation and disassembly, effectively reducing additional maintenance costs. A vertical protrusion (6) is provided on the inner circumference of the clamp bushing (3). A groove (9) is formed on the outer circumference of the clamp bushing (3) corresponding to the vertical protrusion (6). The groove (9) cooperates with the vertical protrusion (8) of the clamp (1) to form a local protrusion structure. The protrusion structure formed is beneficial to increase the contact area and play a role in preventing rotation.

[0007] Furthermore, one end of the handle (2) is provided with a threaded part (4), which is threaded to the lower end of the clamp (1). This connection is convenient for disassembly and assembly, and can also be used to form clamps (1) of different specifications, thereby improving the practicality of the device. Below the threaded part (4) is a knurled textured part (5), which increases the friction.

[0008] Furthermore, the handle (2) and the clamp (1) are connected by welding.

[0009] Furthermore, the clamp bushing (3) is made of rubber material and is formed by 3D printing. The clamp bushing (3) and the clamp (1) are fixed by adhesive bonding, and neoprene adhesive can be used.

[0010] Furthermore, the clamp bushing (3) has annular protrusions (7) on both sides of the circumference. The annular protrusions (7) are clamped between the two sides of the clamp (1). This structure is beneficial for connection with the filter.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This invention solves the core problems of existing spin-on filter assembly and disassembly tools, such as complex structure, poor adaptability, and easy damage to equipment, by adopting a composite structure of metal clamps, non-metallic rubber clamp bushings, and knurled handles. By introducing a rubber bushing assembly, a flexible buffer layer is effectively constructed between the metal tool and the filter housing, which greatly reduces the risk of surface damage during disassembly and assembly, so that the tool can maintain structural strength while also having protective capabilities.

[0012] 2. The tool's operation is simple and intuitive. Simply attach the clamp to the outside of the spin-on filter and apply torque by rotating the handle to complete the installation and removal; no adjustment parts or positioning aids are required. The knurled pattern on the handle significantly increases friction for the operator's grip, ensuring high stability even under complex conditions such as wearing gloves or having oily hands, guaranteeing ease of use and safety. Simultaneously, the inner circumference of the clamp and the inner wall of the bushing have corresponding localized protrusions that engage with the positioning recesses on the spin-on filter, achieving efficient anti-rotation control and improving the tool's coupling reliability during operation.

[0013] 3. This tool has strong on-site flexibility and economic practical value; the overall structure of the tool has few parts, is easy to install and carry, which is significantly better than chain, steel belt and claw structures that require multiple points of assembly. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is an isometric drawing of the clamp of this utility model; Figure 4 This is a schematic diagram of the handle testing structure of this utility model; Figure 5 This is an isometric drawing of the clamp bushing of this utility model; Figure 6 This utility model is connected to the filter.

[0015] In the figure: 1 clamp (1), 2 handle (2), 3 clamp bushing (3), 4 threaded part (4), 5 knurled part (5), 6 vertical protrusion one (6), 7 annular protrusion (7), 8 vertical protrusion two (8), 9 groove (9). Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1

[0017] Please see Figure 1-6This utility model provides a technical solution: a spin-on filter assembly / disassembly tool, comprising: a handle 2, a clamp 1, and a clamp bushing 3; the clamp 1 is a ring-shaped metal structure, one end of which is fixedly connected to the handle 2; preferably, the inner circumference of the clamp 1 is provided with a vertical protrusion 8, which is used to cooperate with the groove 9 on the outside of the clamp bushing 3 to form an anti-rotation structure to prevent slippage during assembly / disassembly.

[0018] The clamp bushing 3 is located inside the clamp 1 and is made of rubber. It is 3D printed to ensure a tight fit with the spin-on filter housing. The inner circumference of the clamp bushing 3 has a vertical protrusion 6, which corresponds to the mating parts on the filter housing to further enhance the anti-slip and positioning functions. To ensure structural stability, the outer circumference of the clamp bushing 3 has a groove 9, which is used to lock and connect with the vertical protrusion 8 of the clamp 1 to prevent the bushing from slipping during use.

[0019] like Figure 4 As shown, one end of the handle 2 is provided with a threaded part 4, which is threaded to the lower end of the clamp 1, making it easy to disassemble and replace clamps 1 of different specifications, thereby improving the versatility and adaptability of the tool; a knurled textured part 5 is provided below the threaded part 4 to increase the friction when the operator holds it and prevent slippage.

[0020] like Figure 5 As shown, the clamp bushing 3 has annular protrusions 7 on both sides of the circumference. These protrusions are embedded between the two sides of the clamp 1, which can effectively limit axial displacement and ensure installation stability and reusability. The clamp bushing 3 and the clamp 1 are bonded and fixed with industrial adhesives such as neoprene, which not only ensures a firm connection but also facilitates later replacement and maintenance.

[0021] When using, such as Figure 6 As shown, the operator places the clamp bushing 3 of this tool onto the outer surface of the spin-on filter. After positioning is achieved through the multiple protrusions inside and outside the clamp 1, the operator can complete the installation or removal of the spin-on filter by holding the handle 2 and rotating it clockwise or counterclockwise. The entire process does not require the use of metal pliers, belts, or claw structures, which can significantly reduce surface damage to the filter housing and improve work efficiency and equipment protection.

[0022] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A spin-on filter dismounting tool comprising a handle (2), a clamp (1) and a clamp bushing (3), characterized in that: The clamp (1) is a ring-shaped metal structure. One end of the clamp (1) is fixedly connected to the handle (2). The inner circumference of the clamp (1) is provided with a vertical protrusion two (8). The clamp bushing (3) is located on the inner side of the clamp (1). The inner circumference of the clamp bushing (3) is provided with a vertical protrusion one (6). The outer circumference of the clamp bushing (3) corresponding to the vertical protrusion one (6) forms a groove (9). The groove (9) cooperates with the vertical protrusion two (8) of the clamp (1) to form a local protrusion structure.

2. A spin-on filter removal tool according to claim 1, wherein: One end of the handle (2) is provided with a threaded part (4), which is threaded to the lower end of the clamp (1), and a knurled part (5) is provided below the threaded part (4).

3. A spin-on filter removal tool as defined in claim 1, wherein: The handle (2) and the clamp (1) are connected by welding.

4. The spin-on filter removal tool of claim 1, wherein: The clamp bushing (3) is made of rubber material and is fixed to the clamp (1) by adhesive bonding.

5. The spin-on filter removal tool of claim 1, wherein: The clamp bushing (3) has annular protrusions (7) on both sides of the circumference, and the annular protrusions (7) are clamped between the two sides of the clamp (1).

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