Auxiliary tool for pulling out spline shaft of aircraft engine driving pump

Abstract

The utility model discloses an auxiliary tool for pulling out a spline shaft of an aircraft engine driving pump. The auxiliary tool comprises a pulling-out driving assembly and an adaptive tray. The pulling-out driving assembly comprises a supporting frame, a driving cylinder and a driving screw, wherein the driving cylinder and the driving screw are coaxially arranged on the supporting frame. The supporting frame comprises a supporting platform and supporting rods evenly connected to the supporting platform in a screwed mode. The supporting platform is provided with a center through hole for the driving screw to penetrate through. The driving cylinder is a cylinder body with an open circumferential wall formed by integrally combining a top plate, a bottom plate and a major arc wall plate; a top plate of the driving cylinder is fixedly connected with the driving screw rod, and two sides of the top plate of the driving cylinder are pinned to form wrench clamping tables; a central bayonet is formed in a bottom plate of the driving cylinder and can be laterally clamped into the spline shaft. The driving screw penetrates through the supporting platform of the supporting frame from the bottom and is in threaded connection fit with the hexagonal nut located on the top face of the supporting platform. The spline shaft pulling-out auxiliary tool can be easily clamped into and wrap the spline shaft laterally, so that the spline shaft is stressed uniformly in the pulling-out process, and the spline shaft is not easy to damage.

Description

Technical Field

[0001] This utility model relates to the field of aircraft ground maintenance technology, and in particular to an auxiliary tool for pulling out the splined shaft of an aircraft engine drive pump. Background Technology

[0002] Please refer to the instruction manual appendix. Figure 1-2 The splined shaft 101 of the engine drive pump 100 of civil aircraft often gets stuck inside the engine drive pump 100 due to deformation or corrosion of the retaining ring 1011, making it difficult to pull out and remove the splined shaft 101 axially. The manufacturer also does not provide any special tools to facilitate the removal of the splined shaft 101. Previously, operators could only rely on experience to pry it out of the engine drive pump 100 using an open-end wrench. However, this method of prying is prone to slippage, difficult to operate, inefficient, and can easily damage related components or injure personnel. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides an auxiliary tool for pulling out the spline shaft of an aircraft engine drive pump, so as to overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An auxiliary tool for pulling out the splined shaft of an aircraft engine drive pump includes a pull-out drive assembly and an adapter tray.

[0006] The pull-out drive assembly includes a support frame and a drive cylinder and a drive screw coaxially mounted on the support frame.

[0007] The support frame includes a support platform and support rods evenly screwed onto the support platform; the support platform is provided with a central through hole for the drive screw to pass through;

[0008] The drive cylinder is composed of a top plate, a bottom plate, and an arc-shaped wall plate, forming a cylinder with an open circumferential wall.

[0009] The top plate of the drive cylinder is fixedly connected to the drive screw;

[0010] The bottom plate of the drive cylinder is provided with a central bayonet, which can be laterally engaged with the spline shaft;

[0011] The drive screw passes through the support platform of the support frame from the bottom and is screwed into a hexagonal nut located on the top surface of the support platform.

[0012] Preferably, the top plate of the drive cylinder is flattened on both sides to form a wrench holder.

[0013] Preferably, the arc length of the superior arc wall plate of the drive cylinder accounts for two-thirds of the circumference of the drive cylinder's circumference.

[0014] Preferably, the bottom surface of the support platform is provided with a plurality of screw holes evenly distributed around its circumference, and the support rod is screwed into the screw holes.

[0015] Preferably, there are three support rods, and each support rod is 15cm long.

[0016] Preferably, the drive screw is an M20*2.5 screw.

[0017] Preferably, the adapter tray is fitted to the port of the engine drive pump and provides a force-bearing surface for pulling out the drive assembly.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1) The aircraft engine drive pump spline shaft removal auxiliary tool in this case has an arc length of the lifting cylinder of the removal drive assembly that accounts for two-thirds of the circumference of the lifting cylinder wall. This allows the spline shaft to be easily and laterally engaged, and to be reliably wrapped around the spline shaft, so that the force is evenly distributed during the removal of the spline shaft and it is not easy to damage the spline shaft.

[0020] 2) The aircraft engine drive pump spline shaft removal auxiliary tool in this case has wrench holders on both sides of its lifting cylinder. When used with an open-end wrench, it can effectively prevent the lifting cylinder from rotating during the spline shaft removal process, which is more conducive to the smooth removal of the spline shaft.

[0021] 3) The auxiliary tool for pulling out the spline shaft of the aircraft engine drive pump in this case is equipped with an adapter tray to provide a force-bearing surface for the support frame, ensuring stable force distribution and preventing damage to the spline shaft or the pump body of the engine drive pump during the pulling out process.

[0022] 4) The auxiliary tool for pulling out the spline shaft of the aircraft engine drive pump in this case has a simple structure, low manufacturing cost, and is conducive to promotion.

[0023] To provide a clearer understanding of this invention, the preferred embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0024] Figure 1 , Figure 2 This is a reference diagram showing the usage state of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 4 This is an exploded view of the present invention;

[0027] Figure 5 , Figure 6 This is a schematic diagram of the drive cylinder of this utility model.

[0028] Attached image labels:

[0029] 1-Pull out the drive assembly; 2-Adaptor tray; 11-Support frame; 12-Drive cylinder; 13-Drive screw; 14-Hexagonal nut; 111-Support platform; 112-Support rod; 121-Top plate; 122-Bottom plate; 123-Ultra-arc wall panel; 124-Center bayonet; 125-Wrench holder; 100-Engine drive pump; 101-Splined shaft; 1011-Snap ring. Detailed Implementation

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] Furthermore, if terms such as "first" or "second" are used for descriptive purposes only, they are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, components or parts, and should not be construed as indicating or implying relative importance.

[0032] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. 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; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] Please also refer to Figure 1-6 This utility model provides an auxiliary tool for pulling out the spline shaft of an aircraft engine drive pump, including a pull-out drive assembly 1 and an adapter tray 2. The adapter tray 2 is adapted to be installed at the port of the engine drive pump 100 and provides a force-bearing surface for the pull-out drive assembly 1. The pull-out drive assembly 1 is used to hold the spline shaft 101 and cooperate with an existing open-end wrench to pull the spline shaft 101 out of the engine drive pump 100.

[0034] Pull out the drive assembly 1, which includes a support frame 11 and a drive cylinder 12 and a drive screw 13 coaxially mounted on the support frame 11.

[0035] The support frame 11 includes a support platform 111 and support rods 112 evenly screwed onto the support platform 111; specifically, a plurality of screw holes are evenly arranged around the bottom surface of the support platform 111, and support rods 112 are screwed into the screw holes.

[0036] Preferably, in this embodiment, three support rods 112 are provided, and the length of the support rods 112 is 15cm.

[0037] The support platform 111 is provided with a central through hole for the drive screw 13 to pass through.

[0038] The drive cylinder 12 is a cylinder with an open circumferential wall, which is integrally composed of a top plate 121, a bottom plate 122 and an arc-shaped wall plate 123.

[0039] The top plate 121 of the drive cylinder 12 is fixedly connected to the drive screw 13;

[0040] The base plate 122 of the drive cylinder 12 is provided with a central bayonet 124. The central bayonet 124 on the base plate 122 of the drive cylinder 12 can be laterally engaged with the spline shaft 101, so that the spline shaft 101 is wrapped inside the drive cylinder 12.

[0041] Furthermore, the two sides of the top plate 121 of the drive cylinder 12 are flattened to form a wrench holder 125. The wrench holder 125 is used to allow an open-end wrench to clamp the drive cylinder 12 and prevent the drive cylinder 12 from rotating during the process of pulling out the spline shaft 101.

[0042] Preferably, in this embodiment, the arc length of the arc of the arc wall plate 123 of the drive cylinder 12 accounts for two-thirds of the circumference of the circumference of the drive cylinder 12, thereby ensuring that the drive cylinder 12 can be laterally inserted into the spline shaft 101.

[0043] The drive screw 13 is integrally connected to the drive cylinder 12 and passes through the support platform 111 of the support frame 11 from the bottom. The drive screw 13 is screwed into the hexagonal nut 14 located on the top surface of the support platform 111 of the support frame 11.

[0044] Preferably, in this embodiment, the drive screw 13 is an M20*2.5 screw.

[0045] The working principle or operation procedure of the auxiliary tool for pulling out the splined shaft of the aircraft engine drive pump in this case is as follows:

[0046] 1. Install the adapter tray 2 at the port of the engine drive pump 100;

[0047] 2. Assemble the support frame 11, connect the support rod 112 to the support platform 111, and let the support rod 112 abut against the adapter tray 2 so that the adapter tray 2 provides a force-bearing surface for the support frame 11.

[0048] 3. Use the drive sleeve 12 to laterally cover the spline shaft 101;

[0049] 4. Install the hexagonal nut 14 from one side of the top surface of the support platform 111 onto the drive screw 13;

[0050] 5. Use an open-end wrench (not shown) to clamp the wrench holder 125 of the drive cylinder 12 from the side, and use a box wrench (not shown) to tighten the hex nut 14. Since the open-end wrench clamps the drive cylinder 12 to prevent the drive cylinder 12 from rotating, with the cooperation of the hex nut 14, the drive screw 13, the drive cylinder 12 and the adapter tray 2, the spline shaft 101 is gradually pulled out of the engine drive pump 100 by the drive cylinder 12.

[0051] Compared to existing technologies, the aircraft engine drive pump spline shaft removal tool in this case can easily be inserted laterally and wrapped around the spline shaft, ensuring even force distribution during the removal process and minimizing damage to the spline shaft.

[0052] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An aircraft engine-driven pump spline shaft pulling-out auxiliary tool, characterized in that: it comprises a pulling-out driving assembly (1) and an adaptive tray (2); the pulling-out driving assembly (1) comprises a support frame (11) and a driving cylinder (12) and a driving screw (13) coaxially arranged on the support frame (11); the support frame (11) comprises a support platform (111) and support rods (112) uniformly screwed on the support platform (111); the support platform (111) is provided with a central through hole for the driving screw (13) to pass through; the driving cylinder (12) is integrally combined by a top plate (121), a bottom plate (122) and an optimal arc wall plate (123) to form a cylinder with an open circumferential wall; the top plate (121) of the driving cylinder (12) is fixedly connected with the driving screw (13); the bottom plate (122) of the driving cylinder (12) is provided with a central bayonet (124) which can be laterally clamped into the spline shaft (101); the driving screw (13) passes through the support platform (111) of the support frame (11) from the bottom and is screwedly connected with a hexagonal nut (14) located on the top surface of the support platform (111).

2. An aircraft engine driven pump spline shaft puller assist tool as defined in Claim 1 wherein: The two sides of the top plate (121) of the driving cylinder (12) are pin-flattened to form a wrench clamping table (125).

3. An aircraft engine driven pump spline shaft puller assist tool as defined in Claim 1 wherein: The optimal arc length of the optimal arc wall plate (123) of the driving cylinder (12) accounts for two-thirds of the circumferential wall length of the driving cylinder (12).

4. An aircraft engine driven pump spline shaft puller assist tool as defined in Claim 1 wherein: The bottom surface of the support platform (111) is uniformly provided with a plurality of screw holes in the circumferential direction, and the support rods (112) are screwed in the screw holes.

5. An aircraft engine driven pump spline shaft puller assist tool as defined in Claim 1 wherein: The support rods (112) are provided in three, and the length of the support rods (112) is 15 cm.

6. An aircraft engine driven pump spline shaft puller assist tool as defined in Claim 1 wherein: The driving screw (13) is an M20*2.5 screw.

7. An aircraft engine driven pump spline shaft puller assist tool as defined in Claim 1 wherein: The adaptive tray (2) is adapted to be installed at the port of the engine-driven pump (100) and provides a stress surface for the pulling-out driving assembly (1).

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