Auxiliary tool for assembling side strut of aircraft landing gear

Abstract

The utility model discloses an auxiliary tool used for assembling a side pillar of an aircraft landing gear, which comprises a bottom plate, a base, a support rod and a connecting pin, the two ends of the bottom plate are respectively provided with a first connecting part protruding upwards, and the two ends of the base are respectively provided with a second connecting part protruding downwards. When the first connecting part and the second connecting part are connected together, a sleeve hole is formed between the bottom plate and the base, during use, the side supporting column penetrates through the sleeve hole, the lower end of the supporting rod is connected with the base, the upper end of the supporting rod is used for being connected with a connecting pin and supporting the connecting pin, and during use, the connecting pin penetrates through a connecting hole of a driven connecting rod on the side supporting column. And the tail part of the connecting pin is in threaded connection with a second hexagonal nut. The auxiliary supporting device can assist in safely and reliably supporting the driven connecting rod on the side supporting column.

Description

Technical Field

[0001] The utility model relates to the field of aircraft landing gear maintenance tools, in particular to an auxiliary tool used for assembling side struts of a 737NG aircraft landing gear. Background Art

[0002] The side strut is an important part of the aircraft landing gear and is the locking device for the landing gear. When the aircraft is parked for inspection, the side strut will be used to support the landing gear, which can serve as a safety measure to prevent the aircraft from crashing directly into the ground after the landing gear is accidentally retracted.

[0003] like Figure 3 The figure shows a schematic diagram of the structure of the side strut of the landing gear of the 737NG aircraft when it is placed on the table 13, which includes a lower strut 9 and an upper strut 10, wherein the lower strut 9 is connected to one end of the upper strut 10, and the other end of the upper strut 10 is connected to a driven connecting rod 11, a connecting hole 15 is provided at the end of the driven connecting rod 11, a strut 14 is provided between the middle part of the driven connecting rod 11 and the upper strut 10, and the strut 14 is connected to the middle part of the driven connecting rod 11 through a safety pin 12.

[0004] During the overhaul of the landing gear, according to the manual requirements, when assembling the side struts, the sensor gap on the side struts needs to be adjusted. When adjusting the sensor gap, the side struts need to be moved repeatedly, so the safety pin 12 connecting the strut 14 and the driven connecting rod 11 will be temporarily removed. In the existing overhaul process, when the safety pin 12 is removed, a staff member is required to hold the driven connecting rod 11 with his hand, and another staff member is required to adjust the gap. Therefore, the entire assembly process requires at least 2-3 people to work together to complete, resulting in a certain amount of manpower waste. Moreover, if the driven connecting rod of the side strut is accidentally retracted, it may press on the fingers of the staff member, posing a certain safety risk. Utility Model Content

[0005] The utility model aims to provide an auxiliary tool used in the assembly of the side struts of an aircraft landing gear, which can assist in safely and reliably supporting the driven connecting rod on the side struts.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] An auxiliary tool used in the assembly of the side struts of an aircraft landing gear, characterized in that it includes a base plate, a base, a support rod and a connecting pin, the two ends of the base plate are respectively provided with a first connecting portion protruding upward, the two ends of the base are respectively provided with a second connecting portion protruding downward, when the first connecting portion and the second connecting portion are connected together, a sleeve hole is formed between the base and the base, when in use, the side strut is passed through the sleeve hole, the lower end of the support rod is connected to the base, the upper end of the support rod is used to connect with the connecting pin and support the connecting pin, when in use, the connecting pin is passed through the connecting hole of the driven connecting rod on the side strut, and the tail of the connecting pin is threadedly connected with a second hexagonal nut.

[0008] Furthermore, a first through hole is provided in the middle of the connecting pin, and the upper end of the supporting rod passes through the first through hole and is connected to the first hexagonal nut.

[0009] Furthermore, a bushing is provided in the middle of the upper portion of the base, an internal thread is provided in the bushing, an external thread is provided at the lower end of the support rod, and the lower end of the support rod is threadedly connected to the bushing.

[0010] Furthermore, the auxiliary tool includes two locking bolts, the first connecting part is respectively provided with a second through hole, the second connecting part is respectively provided with a threaded hole, the locking bolts pass through the second through holes and are threadedly connected with the threaded holes.

[0011] Furthermore, a limiting circular plate is provided at the head of the connecting pin, and the diameter of the limiting circular plate is larger than the diameter of the connecting hole of the driven connecting rod.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model is sleeved on the side pillar through the cooperation of the bottom plate and the base, and is connected by a connecting pin passing through the connecting hole of the driven connecting rod, and the support rod is supported between the base and the connecting pin, so as to form a fast and stable support for the driven connecting rod, so that during the assembly process of the side pillar of the aircraft landing gear, when the safety pin connecting the support rod and the driven connecting rod is removed, the driven connecting rod and the side pillar will not be closed and retracted, and the position between the driven connecting rod and the side pillar will be fixed. Therefore, there is no need for other staff to hold the driven connecting rod, and only one staff member is needed to complete the assembly, thereby achieving the purpose of saving labor costs.

[0014] The stable support of the utility model can better prevent people from getting their hands pinched or injured during the process of assembling the side pillars, thereby improving safety.

[0015] The auxiliary tool of the utility model is easy to operate and can be applied to the renovation of the landing gear of the Boeing 737NG aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is one of the three-dimensional schematic diagrams of the auxiliary tool of the utility model;

[0017] Figure 2 This is the second three-dimensional schematic diagram of the auxiliary tool of the utility model;

[0018] Figure 3 It is a structural diagram of the side strut of an aircraft landing gear.

[0019] Meaning of reference numerals in the figure:

[0020] 1-bottom plate; 1.1-first connecting part; 2-base; 2.1-second connecting part; 3-support rod; 4-connecting pin; 4.1-first through hole; 4.2-limiting circular plate; 5-first hexagonal nut; 6-second hexagonal nut; 7-locking bolt; 8-bushing; 9-lower support; 10-upper support; 11-driven connecting rod; 12-safety pin; 13-table; 14-support rod; 15-connecting hole; 16-sleeve hole. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with embodiments.

[0022] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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.

[0023] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Example:

[0026] like Figure 1 and Figure 2 The auxiliary tool shown in this embodiment is used for assembling the side strut of the aircraft landing gear, which includes a base plate 1, a base 2, a support rod 3, a connecting pin 4, two locking bolts 7, a first hexagonal nut 5 and a second hexagonal nut 6.

[0027] The bottom plate 1 of this embodiment is formed by bending a metal plate, and the two ends of the bottom plate 1 are respectively provided with a first connection part 1.1 protruding upward, and the first connection part 1.1 is respectively provided with a second through hole. The base 2 is made of a high polymer plastic material, and the two ends of the base 2 are respectively provided with a second connection part 2.1 protruding downward, and the second connection part 2.1 is respectively provided with a threaded hole. When in use, the bottom plate 1 will be placed under the side pillar, the first connection parts 1.1 at the two ends of the bottom plate 1 are located on both sides of the side pillar, the base 2 is located on the top of the side pillar, and the second connection parts 2.1 at the two ends of the base 2 are located between the first connection part 1.1 and the side of the side pillar, the locking bolt 7 passes through the second through hole and is threadedly connected with the threaded hole, and the first connection part 1.1 and the second connection part 2.1 are detachably connected together by the locking bolt 7, and a sleeve hole 16 is formed between the bottom plate 1 and the base 2, and the side pillar passes through the sleeve hole 16, so as to be stably sleeved on the side pillar.

[0028] A bushing 8 is provided in the middle of the upper portion of the base 2 , and an internal thread is provided in the bushing 8 . An external thread is provided at the lower end of the support rod 3 . The lower end of the support rod 3 is threadedly connected to the bushing 8 , so that the support rod 3 and the base 2 can be disassembled.

[0029] The upper end of the support rod 3 is used to connect with the connecting pin 4 and support the connecting pin 4. The specific structure is: a first through hole 4.1 is provided in the middle of the connecting pin 4, and the upper end of the support rod 3 is passed through the first through hole 4.1. The upper end of the support rod 3 is provided with an external thread, and a first hexagonal nut 5 is threadedly connected to the upper end of the support rod 3, and the first hexagonal nut 5 can be locked on the support rod 3 through the connecting pin 4.

[0030] Among them, the diameter of the support rod 3 is greater than or equal to 24 mm. While reducing the weight of the auxiliary tool, it can also withstand the force of the retraction and extension of the side pillar assembly, preventing people from being pinched or hit during the assembly of the side pillar assembly, thereby improving safety.

[0031] The connecting pin 4 is used to pass through the connecting hole 15 of the driven connecting rod 11 on the side support, and the diameter of the connecting pin 4 is adapted to the diameter of the connecting hole 15. In this embodiment, a limiting circular plate 4.2 is provided at the head of the connecting pin 4, and the diameter of the limiting circular plate 4.2 is larger than the diameter of the connecting hole 15 of the driven connecting rod 11, and the tail of the connecting pin 4 is threadedly connected with a second hexagonal nut 6.

[0032] The use process of the auxiliary tool in this embodiment is as follows:

[0033] Step 1: Place the base plate 1 under the lower support 9 or the upper support 10;

[0034] Step 2: Place the base 2 across the lower support 9 or the upper support 10, with the second connection parts 2.1 at both ends of the base 2 located in the gap between the first connection part 1.1 and the side support;

[0035] Step 3: Use the locking bolt 7 to pass through the second through hole on the first connecting part 1.1 and screw it into the threaded hole of the second connecting part 2.1;

[0036] Step 4: Screw the lower end of the support rod 3 into the thread of the bushing 8 on the base 2;

[0037] Step 5: Insert the connecting pin 4 into the connecting hole 15 at the end of the driven connecting rod 11;

[0038] Step 6: Connect the second hexagonal nut 6 to the thread of the connecting pin 4 to prevent the connecting pin 4 from slipping out of the connecting hole 15;

[0039] Step 7: Remove the safety pin 12 connecting the support rod 14 and the driven connecting rod 11, retract the driven connecting rod 11 downward, adjust the direction of the first through hole 4.1 on the connecting pin 4, and insert the upper end of the support rod 3 into the first through hole 4.1 on the connecting pin 4;

[0040] Step 8: Connect the first hexagonal nut 5 to the upper end of the support rod 3 to prevent the support rod 3 from slipping out of the first through hole 4.1;

[0041] Step 9: Tighten all threaded parts to lock the entire auxiliary tool.

[0042] The auxiliary tool of this embodiment is mainly used on the side strut assembly of the main landing gear of the 737NG aircraft, and the maintenance manual chapter number involved is CMM32-11-13.

[0043] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. An auxiliary tool for assembling a side strut of an aircraft landing gear, characterized in that: It includes a bottom plate, a base, a support rod and a connecting pin. The two ends of the bottom plate are respectively provided with a first connecting part protruding upward, and the two ends of the base are respectively provided with a second connecting part protruding downward. When the first connecting part is connected with the second connecting part, a sleeve hole is formed between the bottom plate and the base. When in use, the side pillar is passed through the sleeve hole, the lower end of the support rod is connected to the base, and the upper end of the support rod is used to connect with the connecting pin and support the connecting pin. When in use, the connecting pin is passed through the connecting hole of the driven connecting rod on the side pillar, and the tail end of the connecting pin is threadedly connected with a second hexagonal nut.

2. The auxiliary tool for assembling the side strut of an aircraft landing gear according to claim 1, characterized in that: A first through hole is provided in the middle of the connecting pin, and the upper end of the supporting rod passes through the first through hole and is connected with a first hexagonal nut.

3. The auxiliary tool for assembling the side strut of an aircraft landing gear according to claim 1, characterized in that: A bushing is provided in the middle of the upper portion of the base, an internal thread is provided in the bushing, an external thread is provided at the lower end of the support rod, and the lower end of the support rod is threadedly connected to the bushing.

4. The auxiliary tool for assembling the side strut of an aircraft landing gear according to claim 1, characterized in that: The auxiliary tool comprises two locking bolts. The first connecting parts are respectively provided with second through holes, and the second connecting parts are respectively provided with threaded holes. The locking bolts pass through the second through holes and are threadedly connected with the threaded holes.

5. The auxiliary tool for assembling the side strut of an aircraft landing gear according to claim 1, characterized in that: The head of the connecting pin is provided with a limiting circular plate, and the diameter of the limiting circular plate is larger than the diameter of the connecting hole of the driven connecting rod.

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