Lifting mechanism of aircraft engine mounting platform

Abstract

A lifting mechanism of an aircraft engine mounting platform comprises a fixing frame, a lifting frame and shear fork type supporting frames, the lifting frame is located above the fixing frame, and the two shear fork type supporting frames are located on the two sides between the lifting frame and the fixing frame respectively; one end of the lower side of each scissor-fork type supporting frame is fixedly connected with the fixing frame, the other end of each scissor-fork type supporting frame is slidably connected with the fixing frame, the two ends of the upper side of each scissor-fork type supporting frame are slidably connected with the lifting frame, the cross beam is installed between the two scissor-fork type supporting frames, one end of the lifting oil cylinder is hinged to the fixing frame, and the other end of the lifting oil cylinder is hinged to the cross beam; a horizontal pushing device is further installed on the lower side of the lifting frame and connected with the shear fork type supporting frame. Lifting of the lifting frame is achieved through the shear fork type supporting frame, the lifting frame is installed on the shear fork type supporting frame through a sliding structure, and translation of the lifting frame is achieved under the action of the horizontal pushing device. The utility model has the characteristics of compact structure and good stability.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft engine maintenance equipment, in particular to a lifting mechanism for an aircraft engine installation platform. Background Technique

[0002] During the disassembly and assembly of an aircraft engine, it is necessary to ensure the stability of the aircraft engine and the alignment of the installation holes. If the installation holes cannot be aligned, damage to the installation holes may occur during installation, which will cause great harm to the aircraft. Therefore, for the disassembly and assembly of aircraft engines, especially during reinstallation, high requirements are placed on the alignment of the installation holes. In order to be able to more flexibly adjust the reinstallation attitude of the aircraft engine, an installation platform for aircraft engine installation is required, and among them, a lifting mechanism for an aircraft engine installation platform is involved.

[0003] Chinese patent document CN217833496U discloses an assembly device for engine assembly, which also discloses a lifting structure. The characteristic of the lifting structure is that the structure is simple, but the disadvantage is that the lifting structure only provides lifting, and the translation structure is arranged above the lifting structure, which not only increases the height of the equipment, but also the third installation frame is freely installed on the first slide rail through the first slider, and the stability is poor. Content of the Utility Model

[0004] The purpose of the utility model is to provide a lifting mechanism for an aircraft engine installation platform. The lifting of the lifting frame is realized through a scissor support frame, and the lifting frame is installed on the scissor support frame through a sliding structure. Under the action of a flat push device, the translation of the lifting frame is realized. The utility model has the characteristics of compact structure and good stability.

[0005] To achieve the above purpose, the utility model provides a lifting mechanism for an aircraft engine installation platform, which includes a fixed frame, a lifting frame and a scissor support frame. The lifting frame is located above the fixed frame, and the two scissor support frames are respectively located on both sides between the lifting frame and the fixed frame; one end of the lower side of the scissor support frame is fixedly connected to the fixed frame, and the other end is slidably connected to the fixed frame. Both ends of the upper side of the scissor support frame are slidably connected to the lifting frame. A cross beam is installed between the two scissor support frames. One end of the lifting oil cylinder is hinged to the fixed frame, and the other end is hinged to the cross beam; a flat push device is also installed on the lower side of the lifting frame, and the flat push device is connected to the scissor support frame.

[0006] The scissor support frame includes a first support arm and a second support arm, and the middle parts of the first support arm and the second support arm are rotatably connected through a pivot;

[0007] The lower end of the first support arm is provided with a first support through a first hinge shaft. The first support is slidably connected to the fixed frame through a sliding structure. The upper end of the first support arm is provided with a second support through a second hinge shaft. The second support is slidably connected to the lifting frame through a sliding structure;

[0008] The lower end of the second support arm is provided with a third support through a second hinge shaft. The third support is fixedly connected to the fixed frame. The upper end of the second support arm is provided with a fourth support through a second hinge shaft. The fourth support is slidably connected to the lifting frame through a sliding structure.

[0009] The sliding structure is a linear slide rail assembly. The linear slide rail assembly includes a linear guide rail and a slider. The linear guide rail is used to be installed on the fixed frame and the lifting frame. The slider is used to be installed at the bottom of the first support, the second support and the fourth support. The slider slides directionally on the linear guide rail.

[0010] Both ends of the cross beam are respectively connected to the first support arms of the two scissor supports. One end of the lifting oil cylinder is hinged to the fixed frame through a fifth support, and the other end is hinged to the cross beam through a sixth support.

[0011] Two lifting oil cylinders are installed.

[0012] A limiting device is further installed on the scissor support. The limiting device includes a limiting rack and a swinging block. The limiting rack is fixedly installed on the fixed frame. The swinging block is rotatably installed on the first hinge shaft. When the swinging block abuts against the tooth groove of the limiting rack, the scissor support is limited.

[0013] A limiting hole is provided on the first hinge shaft. A limiting member is installed on the swinging block. After the limiting member is inserted into the limiting hole, the swinging block is limited, and at the same time, the swinging block does not contact the limiting rack.

[0014] One end of the flat push device connected to the scissor support is connected to the second hinge shaft of the second support.

[0015] The flat push device is an electric push rod or an oil cylinder or a cylinder.

[0016] The utility model has the following technical effects compared with the prior art:

[0017] 1. When the lifting frame of the utility model needs to rise, the lifting oil cylinder is controlled by the hydraulic system to extend, so that the lifting frame rises translationally. When the lifting oil cylinder retracts, the lifting frame descends translationally. When the lifting frame needs to translate, the flat push device pushes and pulls the lifting frame, so as to realize the translation of the lifting frame. The utility model has the characteristics of compact structure and good stability.

[0018] 2. A limit device is also installed on the scissor support frame of the present utility model. When the swing block abuts against the tooth groove of the limit rack, the scissor support frame is limited, thereby preventing the lifting frame from falling when the lifting oil cylinder fails. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the present utility model.

[0021] Figure 2 Schematic diagram of the front view structure of the present utility model.

[0022] Figure 3 Schematic diagram of the three-dimensional structure of another perspective of the present utility model.

[0023] Figure 4 Schematic diagram of the bottom structure of the present utility model.

[0024] Figure 5 For Figure 2 Schematic diagram of the sectional structure along A-A in

[0025] Figure 6 For Figure 5 Schematic diagram of the sectional structure along B-B in

[0026] In the figure:

[0027] Fixed frame 10;

[0028] Lifting frame 20;

[0029] Scissor support frame 30, first support arm 31, first support 311, second support 312, second support arm 32, third support 321, fourth support 322, pivot 33, cross beam 34, lifting oil cylinder 35, fifth support 351, sixth support 352, first hinge shaft 36, limit hole 361, second hinge shaft 37;

[0030] Linear slide rail assembly 40, linear guide rail 41, slider 42;

[0031] Limit device 50, limit rack 51, swing block 52, limiting member 521;

[0032] Flat push device 60. Detailed Implementation Modes

[0033] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0034] Please refer to Figures 1-5 , a lifting mechanism for an aircraft engine installation platform, which includes a fixed frame 10, a lifting frame 20, and a scissor support frame 30. The lifting frame 20 is located above the fixed frame 10, and the two scissor support frames 30 are respectively located on both sides between the lifting frame 20 and the fixed frame 10. One end of the lower side of the scissor support frame 30 is fixedly connected to the fixed frame 10, and the other end is slidably connected to the fixed frame 10. Both ends of the upper side of the scissor support frame 30 are slidably connected to the lifting frame 20. A cross beam 34 is installed between the two scissor support frames 30. One end of the lifting oil cylinder 35 is hinged to the fixed frame 10, and the other end is hinged to the cross beam 34. A flat push device 60 is further installed on the lower side of the lifting frame 20, and the flat push device 60 is connected to the scissor support frame 30. The lifting of the lifting frame 20 is realized through the scissor support frame 30. The lifting frame 20 is installed on the scissor support frame 30 through a sliding structure, and the translation of the lifting frame 20 is realized under the action of the flat push device 60.

[0035] In this embodiment, the scissor support frame 30 is two cross scissor frames, which are respectively installed on both sides between the fixed frame 10 and the lifting frame 20.

[0036] Specifically, refer to Figure 2 、 3 , each scissor support frame 30 on each side includes a first support arm 31 and a second support arm 32. The middle parts of the first support arm 31 and the second support arm 32 are rotationally connected through a pivot 33. The pivot 33 is similar to a bolt structure, and the first support arm 31 and the second support arm 32 are limited by nuts.

[0037] Refer to Figure 2 , the lower end of the first support arm 31 is installed with a first support 311 through a first hinge shaft 36. The first support 311 is slidably connected to the fixed frame 10 through a sliding structure. The upper end of the first support arm 31 is installed with a second support 312 through a second hinge shaft 37. The second support 312 is slidably connected to the lifting frame 20 through a sliding structure. The lower end of the second support arm 32 is installed with a third support 321 through a second hinge shaft 37. The third support 321 is fixedly connected to the fixed frame 10. The upper end of the second support arm 32 is installed with a fourth support 322 through a second hinge shaft 37. The fourth support 322 is slidably connected to the lifting frame 20 through a sliding structure.

[0038] The structures of the first support 311, the second support 312, the third support 321, and the fourth support 322 are the same. Each of them is composed of two ear plates welded on a base plate, and the end of the support arm is hinged between the two ear plates.

[0039] In this embodiment, referring to Figure 3 , the sliding structure is a linear slide rail assembly 40. The linear slide rail assembly 40 includes a linear guide rail 41 and a slider 42. The linear guide rail 41 is used to be installed on the fixed frame 10 and the lifting frame 20, and the slider 42 is used to be installed at the bottoms of the first support 311, the second support 312, and the fourth support 322. The slider 42 slides directionally on the linear guide rail 41. Through the above structure, the flexible lifting of the scissor support frame 30 and the flexible translation of the lifting frame 20 are realized.

[0040] Of course, in addition to the above structure, the sliding structure can also adopt other structures, such as the structure of a dovetail slider and a dovetail chute. Specifically, dovetail chutes are provided on the fixed frame 10 and the lifting frame 20, and dovetail slider structures are provided at the bottoms of the supports. The dovetail sliders slide directionally in the dovetail chutes.

[0041] Referring to Figure 3 、 4 , both ends of the cross beam 34 are respectively connected to the first support arms 31 of the two scissor support frames 30. One end of the lifting oil cylinder 35 is hinged to the fixed frame 10 through a fifth support 351, and the other end is hinged to the cross beam 34 through a sixth support 352. When the lifting oil cylinder 35 extends, referring to Figure 2 , the lifting oil cylinder 35 pushes one end of the first support arm 31 located at the second support 312 to turn upward, so that the lifting frame 20 translates and rises.

[0042] Referring to Figure 4 , in this embodiment, two lifting oil cylinders 35 are installed.

[0043] Referring to Figure 1 、 3 、5, 6, a limiting device 50 is also installed on the scissor support frame 30. The limiting device 50 includes a limiting rack 51 and a swing block 52. The limiting rack 51 is fixedly installed on the fixed frame 10, and the swing block 52 is rotatably installed on the first hinge shaft 36. When the swing block 52 abuts against the tooth groove of the limiting rack 51, the scissor support frame 30 is limited, thereby preventing the lifting frame 20 from falling when the lifting oil cylinder 35 fails.

[0044] Referring to Figure 6, a limiting hole 361 is provided on the first hinge shaft 36, and a limiting member 521 is installed on the swing block 52. After the limiting member 521 is inserted into the limiting hole 361, the swing block 52 is limited, and at the same time, the swing block 52 does not contact the limiting rack 51. At this time, it is convenient for the scissor support frame 30 to retract, so that the lifting frame 20 falls back. In this embodiment, the limiting member 521 is an insertion pin.

[0045] See Figure 1 、 2 , one end of the flat push device 60 connected to the scissor support frame 30 is connected to the second hinge shaft 37 of the second support 312.

[0046] Specifically, the flat push device 60 is an electric push rod, an oil cylinder or a cylinder.

[0047] The working principle or operation process of the present utility model is as follows:

[0048] When the lifting frame 20 needs to rise, the lifting oil cylinder 35 is controlled by the hydraulic system to extend, so that the lifting frame 20 rises horizontally. When the lifting oil cylinder 35 retracts, the lifting frame 20 descends horizontally.

[0049] When the lifting frame 20 needs to move horizontally, the flat push device 60 pushes and pulls the lifting frame 20, so as to realize the horizontal movement of the lifting frame 20.

[0050] When the scissor support frame 30 needs to be limited, the limiting member 521 is pulled out. At this time, the swing block 52 rotates under the action of gravity and abuts against the limiting rack 51. When the swing block 52 abuts against the tooth groove of the limiting rack 51, the scissor support frame 30 is limited, so as to prevent the lifting frame 20 from falling when the lifting oil cylinder 35 fails.

Claims

1. An aircraft engine mounting platform lifting mechanism, comprising a fixed frame (10), a lifting frame (20) and a scissor-type support frame (30), wherein the lifting frame (20) is located above the fixed frame (10), and is characterized in that: The two scissor-type support frames (30) are respectively located on two sides between the lifting frame (20) and the fixed frame (10); One end of the lower side of the scissor-type support frame (30) is fixedly connected to the fixed frame (10), and the other end is slidably connected to the fixed frame (10); both ends of the upper side of the scissor-type support frame (30) are slidably connected to the lifting frame (20); a crossbeam (34) is installed between the two scissor-type support frames (30); one end of the lifting cylinder (35) is hinged to the fixed frame (10), and the other end is hinged to the crossbeam (34); A horizontal push device (60) is also installed on the lower side of the lifting frame (20), and the horizontal push device (60) is connected to the scissor-type support frame (30).

2. The aircraft engine mounting platform lifting mechanism according to claim 1, characterized in that: The scissor-type support frame (30) comprises a first support arm (31) and a second support arm (32), wherein the middle portions of the first support arm (31) and the second support arm (32) are rotatably connected via a pivot (33); A first support (311) is mounted on the lower end of the first support arm (31) via a first hinge shaft (36); the first support (311) is slidably connected to the fixed frame (10) via a sliding structure; a second support (312) is mounted on the upper end of the first support arm (31) via a second hinge shaft (37); the second support (312) is slidably connected to the lifting frame (20) via a sliding structure; A third support (321) is mounted on the lower end of the second support arm (32) via a second hinge shaft (37); the third support (321) is connected and fixed to the fixing frame (10); a fourth support (322) is mounted on the upper end of the second support arm (32) via a second hinge shaft (37); the fourth support (322) is slidably connected to the lifting frame (20) via a sliding structure.

3. The aircraft engine mounting platform lifting mechanism according to claim 2, characterized in that: The sliding structure is a linear slide rail assembly (40), and the linear slide rail assembly (40) comprises a linear guide rail (41) and a slider (42). The linear guide rail (41) is used to be installed on a fixed frame (10) and a lifting frame (20), and the slider (42) is used to be installed at the bottom of a first support (311), a second support (312), and a fourth support (322). The slider (42) slides in a directional manner on the linear guide rail (41).

4. The aircraft engine mounting platform lifting mechanism according to claim 1, characterized in that: The two ends of the crossbeam (34) are respectively connected to the first support arms (31) of the two scissor-type support frames (30); one end of the lifting cylinder (35) is hinged to the fixed frame (10) via a fifth support (351), and the other end is hinged to the crossbeam (34) via a sixth support (352).

5. An aircraft engine mounting platform lifting mechanism according to claim 1 or 4, characterized in that: Two lifting cylinders (35) are installed.

6. The aircraft engine mounting platform lifting mechanism according to claim 2, characterized in that: A limiting device (50) is also installed on the scissor-type support frame (30), and the limiting device (50) comprises a limiting rack (51) and a swing block (52), wherein the limiting rack (51) is fixedly installed on the fixed frame (10), and the swing block (52) is rotatably installed on the first hinge shaft (36), and when the swing block (52) abuts against the tooth groove of the limiting rack (51), the scissor-type support frame (30) is limited.

7. The aircraft engine mounting platform lifting mechanism according to claim 6, characterized in that: A limiting hole (361) is provided on the first hinge shaft (36), and a limiting member (521) is installed on the swing block (52); after the limiting member (521) is inserted into the limiting hole (361), the swing block (52) is limited, and at the same time, the swing block (52) does not contact the limiting rack (51).

8. The aircraft engine mounting platform lifting mechanism according to claim 2, characterized in that: One end of the horizontal push device (60) connected to the scissor-type support frame (30) is connected to the second hinge shaft (37) of the second support (312).

9. An aircraft engine mounting platform lifting mechanism according to claim 1 or 8, characterized in that: The horizontal push device (60) is an electric push rod or an oil cylinder or an air cylinder.

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