Maintenance tool
By designing a maintenance tool that integrates a can opener, handle, and tail section, the problems of numerous tools, easy forgetting, and hand injuries in lubricating oil maintenance are solved, achieving efficient and safe lubricating oil maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-03-06
AI Technical Summary
In the existing technology, during the maintenance of lubricating oil in aircraft engines, ordinary can-opening tools are difficult to open the lubricating oil can, which can easily injure the hands. The tools are numerous and easily forgotten, resulting in low maintenance efficiency.
Design a maintenance tool including a can-opening part, a handle, and a tail. The can-opening part forms a relief groove through a spike and an abutment block. The handle is equipped with an anti-slip part. The tail is used for switching the locking hole. It integrates multiple functions into one, reducing the number of tools.
This enables efficient lubricant maintenance, avoids hand injuries, saves lubricant, reduces the chance of forgetting tools, and improves maintenance efficiency.
Smart Images
Figure CN223973850U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aviation maintenance equipment technology, and in particular to a maintenance tool. Background Technology
[0002] Currently, when performing lubrication maintenance on aircraft engines, it is necessary to first use a tool to insert into the locking hole of the lubrication maintenance cover to unlock and open the lubrication maintenance cover. Then, check the remaining oil level in the oil tank and add lubrication as needed. If lubrication needs to be added, open the oil tank cap, use a can opener to open a certain number of oil cans, and add the lubrication from the cans into the oil tank until the oil tank is full. Then, close the oil tank cap, and finally use a tool to insert into the locking hole of the lubrication maintenance cover to close and lock the lubrication maintenance cover.
[0003] During the aforementioned maintenance process, ordinary can-opening tools (such as flathead cutters) are difficult to use to open the lubricating oil cans. Repeated opening may injure the workers' hands, and there is also the problem of wasting lubricating oil due to improper opening positions. In addition, both locking and unlocking tools and can-opening tools need to be carried out simultaneously to carry out the maintenance work completely. With many tools, it is not easy to store and organize them. When workers forget to bring any tool, they need to return to the tool store to borrow the missing tool, which reduces the efficiency of lubricating oil maintenance. Utility Model Content
[0004] The purpose of this invention is to provide a maintenance tool to solve the technical problems mentioned in the background section.
[0005] To achieve the above objectives, this utility model provides a maintenance tool for performing lubricating oil maintenance on aircraft engines. It includes an opening section, a handle, and a tail section arranged sequentially from front to back. The opening section includes a spike and a stop block. The spike is spaced above the stop block, and the spike and the stop block form a first clearance groove with the opening facing forward. The rear end of the tail section has a rectangular cross-section perpendicular to the front-back direction, and the width of the rear end in the left-right direction is greater than its height in the up-down direction. The tail section is used to insert into the locking hole of the lubricating oil maintenance cover, thereby switching the locking of the lubricating oil maintenance cover between an unlocked and locked state. The bottom surface of the handle has an anti-slip part extending in the front-back direction.
[0006] Optionally, the front end of the tail is connected to the rear end of the handle, and the cross-sectional shape of the tail perpendicular to the front-rear direction gradually transitions from its front end to its rear end.
[0007] Optionally, the width of the handle in the left-right direction is greater than the width of the rear end of the tail in the left-right direction, and the height of the handle in the up-down direction is greater than the height of the rear end of the tail in the up-down direction.
[0008] Optionally, the anti-slip part includes multiple anti-slip arc-shaped grooves, which are sequentially arranged on the bottom surface of the handle along the front-back direction.
[0009] Optionally, a transition fillet with a diameter of 1.5mm to 3mm is provided between two adjacent anti-slip arc grooves, the diameter of the anti-slip arc groove is 25mm to 35mm, and the distance between the top of the anti-slip arc groove and the bottom surface of the handle in the vertical direction is 3mm to 5mm.
[0010] Optionally, the handle is provided with a through hole extending in the left-right direction.
[0011] Optionally, the front end of the spike faces forward and downward, the spike narrows from its front end on both sides relative to the left and right directions, and the front end of the spike is spike-shaped.
[0012] Optionally, the bottom of the spike is provided with a first extrusion surface and a second extrusion surface from front to back. The first extrusion surface is connected to the front end of the spike and the second extrusion surface, respectively, and the second extrusion surface is connected to the first relief groove.
[0013] Wherein, the first extrusion surface and the second extrusion surface have an included angle, or the first extrusion surface is an upwardly concave arc surface.
[0014] Optionally, the top of the front end of the abutting block is designated as the abutting end, and the top surface of the abutting block is provided with a second clearance groove. The second clearance groove is located behind the abutting end, and the second clearance groove is connected to and connected to the first clearance groove. The second clearance groove is connected to the abutting end, and both the first clearance groove and the second clearance groove are arc-shaped grooves.
[0015] Optionally, the width of the handle in the left-right direction is 8mm to 12mm, and the length of the handle in the front-back direction is 50mm to 70mm.
[0016] The width of the rear end of the tail in the left-right direction is 7mm to 9mm, and the height of the rear end of the tail in the up-down direction is 1mm to 2mm.
[0017] The opening has a width of 3mm to 4mm in the vertical direction, the first clearance groove is an arc-shaped groove with a diameter of 3mm to 5mm, the distance between the front end of the abutment block and the rear end of the first clearance groove is 3.5mm to 4.5mm, the front end of the spike protrudes from the abutment block by 14mm to 18mm, and the front end of the spike is higher than the front end of the abutment block by 1.5mm to 2.5mm.
[0018] The maintenance tools are integrally machined from stainless steel of grades 108Cr17, 9Cr18Mo, 9Cr18MoV, S44004, or 440C.
[0019] Compared with the prior art, the maintenance tool of this utility model has the following advantages:
[0020] In this utility model maintenance tool, the opening part, handle, and tail are arranged sequentially from front to back. The opening part is used to poke an oil guide hole and a vent hole on the top surface of the lubricating oil tank to open it. The handle is for the worker to grip, and the tail is used to insert into the locking hole of the lubricating oil service cover to switch the lubricating oil service cover between an unlocked and locked state. Specifically, in the opening part, a spike is located above the abutment block, and the spike and the abutment block form a first clearance groove with the opening facing forward, allowing the worker to bring the maintenance tool closer to the lubricating oil tank. The upper outer edge of the oil tank passes through the opening and is inserted into the first clearance groove. Then, the abutment block abuts against the bottom surface of the upper outer edge of the oil tank. The worker holds the anti-slip part and pulls the handle upward, causing the spike to insert into the top surface of the oil tank to create a hole. This operation is repeated twice to create an oil guide hole and a vent hole on the top surface of the oil tank. In the tail section, the rear end of the tail section corresponds to the shape of the locking hole of the oil service cover plate, which is a rectangle with a width greater than its height in the vertical direction. The specific unlocking operation is as follows: The operator inserts the tail end into the locking hole of the lubricating oil service cover, then grasps the anti-slip part and rotates the handle around the tail end clockwise (or counterclockwise) to unlock the lubricating oil service cover. The locking operation is as follows: the operator inserts the tail end into the locking hole of the lubricating oil service cover, grasps the anti-slip part, and rotates the handle around the tail end counterclockwise (or clockwise) to lock the lubricating oil service cover. During the opening, unlocking, and locking operations, the operator's hand rubs against the handle in a forward-backward direction. The anti-slip part increases the friction between the hand and the handle, preventing slippage or loss of hand during these operations. In summary, the operator only needs to carry this utility model maintenance tool to effectively perform lubricating oil service maintenance. Opening the lubricating oil can is simple and effortless, does not injure the hands, pours lubricating oil cleanly, and saves lubricating oil. The number of tools required for lubricating oil service maintenance is reduced, decreasing the likelihood of forgetting any tools and resulting in low maintenance efficiency, thereby improving the efficiency of lubricating oil service maintenance. Attached Figure Description
[0021] Figure 1 This is the front view of the maintenance tool of this utility model.
[0022] Figure 2 for Figure 1 A magnified view of part A in the middle.
[0023] Figure 3 This is a right view of the maintenance tool of this utility model.
[0024] Reference numerals: 1. Can opening section; 11. Spike; 12. Abutting block; 121. Abutting end; 13. Opening; 14. First clearance groove; 15. Second clearance groove; 2. Handle; 21. Anti-slip part; 211. Anti-slip arc groove; 22. Transition rounded corner; 23. Through hole; 3. Tail. Detailed Implementation
[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0026] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.
[0027] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] like Figures 1 to 3 As shown, this utility model discloses a maintenance tool for aircraft engine lubricating oil maintenance. It includes an opening section 1, a handle 2, and a tail section 3 arranged sequentially from front to back. The opening section 1 includes a spike 11 and a stop block 12. The spike 11 is spaced above the stop block 12. The spike 11 and the stop block 12 form a first clearance groove 14 with the opening 13 facing forward. The rear end of the tail section 3 has a rectangular cross-section perpendicular to the front-back direction. The width of the rear end of the tail section 3 in the left-right direction is greater than its height in the up-down direction. The tail section 3 is used to insert into the locking hole of the lubricating oil maintenance cover, thereby switching the locking of the lubricating oil maintenance cover between an unlocked state and a locked state. The bottom surface of the handle 2 is provided with an anti-slip part 21 extending in the front-back direction.
[0029] In the above technical solution, the can-opening part 1 is used to poke an oil guide hole and a vent hole on the top surface of the lubricating oil tank to open the lubricating oil tank. The handle 2 is used for the operator to grasp it, and the tail part 3 is used to insert into the locking hole of the lubricating oil service cover to switch the lubricating oil service cover between the unlocked and locked states. Specifically, in the can-opening part 1, the spike 11 is located above the abutment block 12, and the spike 11 and the abutment block 12 form a first clearance groove 14 with the opening 13 facing forward. The operator can bring the maintenance tool forward and close to the lubricating oil tank so that the upper outer edge of the lubricating oil tank passes through the opening. 13, and insert it into the first clearance groove 14, then the abutment block 12 abuts against the bottom surface of the upper outer edge of the lubricating oil tank. The worker holds the anti-slip part 21 and pulls the handle 2 upward, so that the spike 11 is inserted into the top surface of the lubricating oil tank to open a hole in the top surface of the lubricating oil tank. Repeat this operation twice to open an oil guide hole and a vent hole in the top surface of the lubricating oil tank; In the tail 3, the rear end of the tail 3 is set to a rectangular shape corresponding to the locking hole of the lubricating oil service cover plate, and the width along the left and right direction is greater than the height along the up and down direction; The specific unlocking operation is: the worker The operator inserts the tail end 3 into the locking hole of the lubricating oil service cover, then grasps the anti-slip part 21 and rotates the handle 2 around the tail end 3 in a clockwise or counterclockwise direction to unlock the lubricating oil service cover; the specific locking operation is as follows: the operator inserts the tail end 3 into the locking hole of the lubricating oil service cover, grasps the anti-slip part 21 and rotates the handle 2 around the tail end 3 in a counterclockwise or clockwise direction to lock the lubricating oil service cover; during the operator's opening, unlocking and locking operations, the hand will make contact with the handle 2 in the back-and-forth direction. The friction and anti-slip part 21 is used to increase the friction between the hand and the handle 2, preventing the worker from slipping or losing their hand during the aforementioned two operations. In summary, the worker only needs to carry the maintenance tool of this utility model to perform lubricating oil maintenance well. Opening the lubricating oil canister is simple and labor-saving, does not hurt the hands, pours out the lubricating oil cleanly, and saves lubricating oil. The number of tools that the worker needs to carry when performing lubricating oil maintenance is reduced, which reduces the probability of the worker forgetting to bring any tool, resulting in low maintenance efficiency, thereby improving the efficiency of lubricating oil maintenance.
[0030] Furthermore, the front end of the tail portion 3 is connected to the rear end of the handle 2. Specifically, the top surface of the tail portion 3 is connected to the top surface of the rear end of the handle 2, the two sides of the tail portion 3 are connected to the two sides of the handle 2 respectively, and the bottom surface of the tail portion 3 is connected to the bottom surface of the handle 2. This facilitates the manufacturing of the part where the handle 2 connects to the tail portion 3, reduces stress concentration, and enhances the strength of the connection between the handle 2 and the tail portion 3. Furthermore, the cross-sectional shape of the tail portion 3, perpendicular to the front-rear direction, gradually transitions from its front end to its rear end, making the shape of the tail portion 3 resemble... Similar to the lofting from the front end to the rear end, so that the shape of the tail 3 transitions more smoothly from front to back, so as to facilitate the processing and manufacturing of the tail 3, reduce stress concentration, and enhance the strength of the tail 3; preferably, in order to improve the feel of the operator gripping the handle 2 and to make the tail 3 match the locking hole of the lubricating service cover, the size of the handle 2 is larger than the size of the rear end of the tail 3. Specifically, the width of the handle 2 in the left-right direction is greater than the width of the rear end of the tail 3 in the left-right direction, and the height of the handle 2 in the up-down direction is greater than the height of the rear end of the tail 3 in the up-down direction.
[0031] Furthermore, the anti-slip part 21 includes a plurality of anti-slip arc-shaped grooves 211, which are sequentially arranged on the bottom surface of the handle 2 in the front-to-back direction, so that the operator can grip the handle with their fingers in the corresponding anti-slip arc-shaped grooves 211. Furthermore, in order to adapt to the size of most people's hands and improve the gripping comfort, a transition rounded corner 22 with a diameter of 1mm to 3mm, preferably 2mm, is provided between two adjacent anti-slip arc-shaped grooves 211. The diameter of the anti-slip arc-shaped grooves 211 is 25mm to 35mm, preferably 30mm. The distance between the centers of two adjacent anti-slip arc-shaped grooves 211 is 15mm to 25mm, preferably 20mm. The distance between the top of the anti-slip arc-shaped groove 211 and the bottom surface of the handle 2 in the vertical direction is 3mm to 5mm, preferably 4mm.
[0032] Furthermore, the handle 2 is provided with a through hole 23 running in the left-right direction, so that workers can use ropes or chains to pass through the through hole 23, thereby facilitating the organization and management of tools.
[0033] Furthermore, the front end of the spike 11 faces forward and downward, so that the worker can pull it up at a small angle to pierce the lubricating oil tank. The spike 11 narrows from its front end on both sides relative to the left and right directions, and the angle at which the sides narrow from its front end can be 50° to 70°, preferably 60°. The front end of the spike 11 is sharp to reduce the contact area when the spike 11 pierces the lubricating oil tank, thereby increasing the pressure and making it easier to pierce the lubricating oil tank.
[0034] Furthermore, the bottom of the spike 11 is provided with a first extrusion surface 111 and a second extrusion surface 112 from front to back. The first extrusion surface 111 is connected to the front end of the spike 11 and the second extrusion surface 112, respectively, and the second extrusion surface 112 is connected to the first relief groove 14. The first extrusion surface 111 and the second extrusion surface 112 have an included angle of less than 180° and greater than 0°, or the first extrusion surface 111 is an upwardly concave arc surface. When the front end of the spike 11 is inserted into the top surface of the lubricating oil tank and pierces it, the spike 11 continues to extend into the lubricating oil tank. At this time, the top surface of the lubricating oil tank is squeezed by the first extrusion surface 111 and the second extrusion surface 112 to enlarge the hole formed by the piercing, so that the lubricating oil tank can pour out the lubricating oil more quickly.
[0035] Furthermore, the top of the front end of the abutment block 12 is provided as an abutment end 121, and the top surface of the abutment block 12 is provided with a second clearance groove 15. The second clearance groove 15 is located behind the abutment end 121. The second clearance groove 15 is connected to and connected to the first clearance groove 14. The second clearance groove 15 is connected to the abutment end 121. Both the first clearance groove 14 and the second clearance groove 15 are arc-shaped grooves to ensure that there is enough space to accommodate the upper edge of the lubricating oil tank.
[0036] Furthermore, the lubricating oil cans used in lubricating oil maintenance are generally 1 Qt (0.946L) metal cans in the US standard, making it difficult for ordinary can openers to open such cans. Specifically, when using an ordinary can opener to open this lubricating oil can, problems such as lubricating oil splashing out and the opening being too far from the edge of the can making it difficult to pour out all the lubricating oil occur, resulting in lubricating oil waste and inconvenience during opening. To solve the aforementioned problems and improve the comfort of the operator, the handle 2 has a width of 8mm to 12mm in the left-right direction, preferably 10mm, and a length of 50mm to 70mm in the front-back direction, preferably 60mm; in order to allow the tail 3 to match the locking hole of the lubricating oil maintenance cover, the rear end of the tail 3 is... The width of the opening 13 is 7mm to 9mm, preferably 8mm, and the height of the rear end of the tail 3 in the vertical direction is 1mm to 2mm, preferably 1.5mm. In order to make the can opening part 1 match the size of the lubricating oil can for opening, the width of the opening 13 in the vertical direction is 3mm to 4mm, preferably 3.5mm. The first clearance groove 14 is an arc groove with a diameter of 3mm to 5mm, preferably 4mm. The distance between the front end of the abutment block 12 and the rear end of the first clearance groove 14 is 3.5mm to 4.5mm, preferably 4mm. The front end of the spike 11 protrudes from the abutment block 12 by 14mm to 18mm, preferably 15.5mm. The front end of the spike 11 is higher than the front end of the abutment block 12 by 1.5mm to 2.5mm, preferably 2mm.
[0037] Furthermore, since a large number of oil cans need to be opened during a single lubricating oil maintenance service, fatigue fracture is likely to occur if a general can opener is used. To solve this problem, the maintenance tool is made of stainless steel of grade 108Cr17, 9Cr18Mo, 9Cr18MoV, S44004 or 440C, so that the can opening part 1 has sufficient strength and corrosion resistance to cope with a large number of can opening operations.
[0038] Furthermore, fixed setting and fixed connection refer to the fixed relative positional relationship of two components, including but not limited to fixing by connectors, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap-fit connection.
[0039] Furthermore, the connectors include, but are not limited to, fasteners, straps, ropes, pneumatic connectors, hydraulic connectors, flanges, Velcro, and buttons.
[0040] In summary, this utility model embodiment provides a maintenance tool, the technical effects of which are as follows:
[0041] In this utility model maintenance tool, the can-opening part 1, handle 2, and tail part 3 are arranged sequentially from front to back. The can-opening part 1 is used to poke an oil guide hole and a vent hole on the top surface of the lubricating oil can to open it. The handle 2 is for the operator to grip. The tail part 3 is used to insert into the locking hole of the lubricating oil service cover, allowing the cover to switch between an unlocked and locked state. Specifically, in the can-opening part 1, a spike 11 is positioned above the abutment block 12, and the spike 11 and the abutment block 12 form a first clearance groove 14 with an opening 13 facing forward, allowing the operator to insert the maintenance tool. Approaching the oil tank forward, the upper outer edge of the oil tank passes through the opening 13 and is inserted into the first clearance groove 14. Then, the abutment block 12 abuts against the bottom surface of the upper outer edge of the oil tank. The worker holds the anti-slip part 21 and pulls the handle 2 upward, so that the spike 11 is inserted into the top surface of the oil tank to make a hole in the top surface of the oil tank. This operation is repeated twice to make an oil guide hole and a vent hole in the top surface of the oil tank. In the tail 3, the rear end of the tail 3 is set to a rectangular shape corresponding to the locking hole of the oil service cover plate, and the width along the left and right direction is greater than the height along the up and down direction. The specific unlocking operation is as follows: the worker inserts the tail 3 into the locking hole of the lubricating oil service cover, and then grasps the anti-slip part 21 and rotates the handle 2 around the tail 3 in a clockwise or counterclockwise direction to unlock the lubricating oil service cover; the specific locking operation is as follows: the worker inserts the tail 3 into the locking hole of the lubricating oil service cover, grasps the anti-slip part 21 and rotates the handle 2 around the tail 3 in a counterclockwise or clockwise direction to lock the lubricating oil service cover; during the worker's opening, unlocking and locking operations, the hand will come into contact with the handle 2. The anti-slip part 21 increases friction between the hand and the handle 2, preventing the worker from slipping or losing their hand during the aforementioned two operations. In summary, the worker only needs to carry the maintenance tool of this utility model to perform lubricating oil maintenance well. Opening the lubricating oil canister is simple and labor-saving, does not hurt the hands, pours out the lubricating oil cleanly, and saves lubricating oil. The number of tools that the worker needs to carry when performing lubricating oil maintenance is reduced, which reduces the chance of the worker forgetting to bring any tool, resulting in low maintenance efficiency, thereby improving the efficiency of lubricating oil maintenance.
[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A maintenance tool characterized by, The utility model provides an aero-engine oil service maintenance, including the can opening part (1) from front to back, handle (2) and tail (3) in proper order, the can opening part (1) includes the dart (11) and the abutment block (12), the dart (11) is spacedly arranged above the abutment block (12), the dart (11) and the abutment block (12) between the first let -by slot (14) of opening (13) towards the first is formed, the tail (3) rear end perpendicular to the cross section of front and back direction is rectangle, the tail (3) rear end along the width of left and right direction is greater than its along the height of up and down direction, the tail (3) is used for inserting the lock catch hole of oil service cover plate, and then makes the lock catch of oil service cover plate switch between the unlocking state and the locking state, the bottom of handle (2) is equipped with the anti -skid portion (21) along the extension of front and back direction.
2. The maintenance tool of claim 1, wherein, The front end of the tail (3) is connected to the rear end of the handle (2), and the cross-sectional shape of the tail (3) perpendicular to the front and back direction gradually transitions from the front end to the rear end.
3. The maintenance tool of claim 2, wherein, The width of the handle (2) along the left and right direction is greater than the width of the rear end of the tail (3) along the left and right direction, and the height of the handle (2) along the up and down direction is greater than the height of the rear end of the tail (3) along the up and down direction.
4. The maintenance tool of claim 1, wherein, The anti-skid portion (21) includes a plurality of anti-skid arc grooves (211) arranged in sequence on the bottom of the handle (2) along the front and back direction.
5. The maintenance tool of claim 4, wherein, A transition round corner (22) with a diameter of 1.5mm to 3mm is arranged between two adjacent anti-skid arc grooves (211), the diameter of the anti-skid arc groove (211) is 25mm to 35mm, and the distance between the top of the anti-skid arc groove (211) and the bottom of the handle (2) along the up and down direction is 3mm to 5mm.
6. The maintenance tool of claim 1, wherein, A through hole (23) is arranged on the handle (2) along the left and right direction.
7. The maintenance tool of claim 1, wherein, The front end of the dart (11) faces the lower front, the dart (11) narrows from its two sides, top and bottom relative to the left and right direction to the front end, and the front end of the dart (11) is sharp.
8. The maintenance tool of claim 7, wherein, The bottom of the dart (11) is sequentially provided with a first extrusion surface (111) and a second extrusion surface (112) from front to back, the first extrusion surface (111) is respectively connected to the front end of the dart (11) and the second extrusion surface (112), and the second extrusion surface (112) is connected to the first let -by slot (14). Wherein, the first extrusion surface (111) and the second extrusion surface (112) have an included angle, or the first extrusion surface (111) is an upwardly recessed arc surface.
9. The maintenance tool of claim 1, wherein, The top of the front end of the abutment block (12) is provided with an abutment end (121), the top surface of the abutment block (12) is provided with a second let -by slot (15), the second let -by slot (15) is located behind the abutment end (121), the second let -by slot (15) is connected to the first let -by slot (14), the second let -by slot (15) is connected to the abutment end (121), and the first let -by slot (14) and the second let -by slot (15) are both arc grooves.
10. The maintenance tool of claim 1, wherein, The width of the handle (2) in the left-right direction is 8-12 mm, and the length of the handle (2) in the front-rear direction is 50-70 mm; The width of the rear end of the tail (3) in the left-right direction is 7-9 mm, and the height of the rear end of the tail (3) in the up-down direction is 1-2 mm; The width of the opening (13) in the up-down direction is 3-4 mm, the first accommodating slot (14) is an arc-shaped slot with a diameter of 3-5 mm, the distance between the front end of the abutting block (12) and the rear end of the first accommodating slot (14) is 3.5-4.5 mm, the front end of the stab cone (11) protrudes from the abutting block (12) by 14-18 mm, and the front end of the stab cone (11) is higher than the front end of the abutting block (12) by 1.5-2.5 mm; The maintenance tool is integrally made of stainless steel with a brand of 108Cr17, 9Cr18Mo, 9Cr18MoV, S44004 or 440C.