Aircraft seat pulling handle mounting tool

Abstract

The utility model discloses an aircraft seat pulling handle installation tool, which belongs to the technical field of aircraft seat pulling handle installation and comprises a pressing rod, a connecting rod and a driving arm, the pressing rod is connected with the connecting rod through a universal joint, the connecting rod is connected with the driving arm through the universal joint, a slot is arranged on the driving arm, and external threads are arranged on the pressing rod. External threads on the pressing rod are connected with a fixing sleeve on an aircraft seat in a screwed mode, the pressing rod can be screwed in the fixing sleeve through rotation of the driving arm through a tool, steering transmission of the two universal joints and transmission of the connecting rod, the pressing rod presses the pressing cover downwards, the pressing cover overcomes the elastic force of the spring to press the telescopic rod, and therefore the rotating rod rotates. The steel ball is placed in the groove of the cam, so that the steel ball can enter the limiting range of the protecting cover, and the pulling handle is reset; the device is simple in structure, convenient and flexible to use, capable of efficiently resetting the pulling handle of the aircraft seat, capable of avoiding the situation that the operation space is limited, and good in practicability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of aircraft seat pull handle installation, specifically an aircraft seat pull handle installation tool. BACKGROUND

[0002] Ejection seats are devices used to protect pilots in emergency situations, typically installed on military aircraft. The working principle is to eject the pilot from the aircraft cabin through a rocket engine or other power device, and ensure safe landing through a parachute system. The design and function of ejection seats are very complex, including seat frame, chair basin, headrest, ejection guide device (such as pulley and slider), fixing device, rocket engine, parachute system, etc.

[0003] Modern ejection seats are not limited to fighter jets, but also extend to helicopters and other aircraft. In addition, the application of ejection seats has gradually expanded to the general aviation field, and with the rapid development of general aviation, the importance of its lifesaving performance is increasingly prominent. As a key device for aviation lifesaving, the technology of ejection seats is constantly expanding, providing important protection for the safety of pilots.

[0004] As shown in the prior art, the principle of installing the aircraft seat pull handle is shown in the figure. Figures 3-4

[0005] When the aircraft is landing for maintenance, multiple safety devices are needed to avoid accidental triggering of the aircraft seat. However, during maintenance, maintenance personnel may accidentally pull the pull handle. After the pull handle is pulled out, the cam 7 rotates, and the steel ball 8 is pulled out of the limiting range of the cover 9 (safety device to avoid triggering of the aircraft seat). A special tool needs to be inserted into the fixed sleeve 2 to press down the gland 3, overcome the spring 4 force to press down the telescopic rod 5, realize the reverse rotation of the rotating rod 6 to drive the cam 7, make the steel ball 8 enter the limiting range of the cover 9, and make the pull handle 1 reset. However, due to the limited operating space at the upper part of the fixed sleeve 2, the use of conventional tools cannot achieve the efficiency and convenience of pressing down the telescopic rod 5, and the operation is time-consuming and laborious. INVENTION CONTENTS

[0006] To solve the problem of limited operating space at the upper part of the fixed sleeve, the use of conventional tools cannot achieve the efficiency and convenience of pressing down the telescopic rod, and the operation of resetting the pull handle is time-consuming and laborious, the utility model provides a kind of aircraft seat pull handle installation tool.

[0007] The utility model is realized by the following technical solutions:

[0008] ​An aircraft seat pull handle installation tool, comprising a pressing rod, a connecting rod and a driving arm, the pressing rod is connected with the connecting rod through a universal joint, the end of the connecting rod away from the pressing rod is connected with the driving arm through a universal joint, a slot is formed on the driving arm, and an external thread capable of being screwed with a fixed sleeve on the aircraft seat is arranged on the end of the pressing rod away from the connecting rod.

[0009] The further improvement of the utility model still comprises a ratchet wrench capable of being inserted into the slot.

[0010] The further improvement of the utility model still comprises that a chamfer is arranged on the end of the pressing rod away from the connecting rod.

[0011] The further improvement of the utility model still comprises that a pressing base is arranged on the end of the pressing rod away from the connecting rod.

[0012] The further improvement of the utility model still comprises that the pressing base and the pressing rod are rotatably connected and installed through a rotating piece.

[0013] The further improvement of the utility model still comprises that the rotating piece is a thrust bearing.

[0014] The further improvement of the utility model still comprises that an annular groove is arranged on the pressing rod, a limiting ring is rotatably sleeved outside the groove, and a supporting rod is connected to the limiting ring.

[0015] The further improvement of the utility model still comprises that a circular table is arranged on the end of the driving arm away from the connecting rod, the diameter of the circular table is larger than the diameter of the driving arm, and the slot is formed on the circular table.

[0016] From the above technical scheme, the beneficial effects of the utility model are:

[0017] In use, the external thread on the pressing rod is screwed with the fixed sleeve on the aircraft seat through the free rotation of the two universal joints, the driving arm is rotated through a wrench or the like, the rotation of the two universal joints is transmitted, the transmission of the connecting rod is realized, the pressing rod is screwed into the fixed sleeve, the lower end of the pressing rod is used to press the gland, the spring force is overcome to press the telescopic rod, the rotating rod is rotated, the steel ball is placed into the cam groove, the steel ball is limited in the limiting range of the cover, the pull handle is reset, the device has simple structure, is convenient and flexible to use, can efficiently reset the pull handle of the aircraft seat, can avoid the limited operation space, and has good practicability. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model, the drawings needed to be used in the description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 This is a first-view structural diagram of a specific embodiment of the present invention.

[0020] Figure 2 This is a second-view structural diagram of a specific embodiment of the present invention.

[0021] Figure 3 This is a diagram showing the installation of the pull handle.

[0022] Figure 4 This is a schematic diagram illustrating the principle of pulling the handle.

[0023] In the attached diagram: 1. Pull handle, 2. Fixed sleeve, 3. Pressure cap, 4. Spring, 5. Telescopic rod, 6. Rotating rod, 7. Cam, 71. Cam groove, 8. Steel ball, 9. Protective cover, 10. Steel cable, 11. Pressure rod, 12. Connecting rod, 13. Active arm, 14. Ratchet wrench, 15. Support rod, 16. Pressure seat, 17. External thread, 18. Slot. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] like Figures 3-4 The diagram shows the installation principle of the aircraft seat ejection handle in the prior art. The steel ball 8 is locked in the cam groove 71 and is located within the limiting range of the cover 9. When the ejection handle 1 is pulled, the steel ball 8 is pulled by the steel cable 10, which drives the cam 7 to rotate. The steel ball 8 is dislodged from the limiting range of the cover 9 and drives the seat trigger switch to operate through the rotating rod 6, thereby realizing the ejection of the aircraft seat.

[0026] like Figures 1-2 As shown, this utility model discloses an installation tool for an aircraft seat pull handle, including a pressure rod 11, a connecting rod 12, and an active arm 13. The pressure rod 11 is connected to the connecting rod 12 via a universal joint. The end of the connecting rod 12 away from the pressure rod 11 is connected to the active arm 13 via a universal joint. The active arm 13 has a slot 18. The end of the pressure rod 11 away from the connecting rod 12 has an external thread 17 that can be screwed through and connected to the fixing sleeve 2 on the aircraft seat.

[0027] When in use (when the handle 1 is pulled out by mistake), the outer thread 17 on the pressing rod 11 can be screwed with the fixed sleeve 2 on the aircraft seat through the free rotation of the two universal joints. The driving arm 13 can be rotated through a wrench or the like, and the pressing rod 11 can be screwed into the fixed sleeve 2 through the transmission of the two universal joints and the transmission of the connecting rod 12, so that the pressing rod 11 can press down the pressing cover 3 through the lower end of the pressing rod 11, the pressing cover 3 can press the telescopic rod 5 against the spring 4, and the rotating rod 6 (cam 7) can be rotated, the steel ball 8 can be placed into the cam groove 71, the steel ball 8 can be limited in the range of the protective cover 9, and the handle 1 can be reset. The device has the advantages of simple structure, convenient and flexible use, high efficiency in resetting the handle 1 of the aircraft seat, avoidance of limited operation space, and good practicability.

[0028] The device further comprises a ratchet wrench 14 which can be inserted into the slot 18. The ratchet wrench 14 can be used to conveniently rotate the pressing rod 11.

[0029] The end of the pressing rod 11 away from the connecting rod 12 is provided with a chamfered edge. The pressing rod 11 can be effectively guided and inserted into the fixed sleeve 2.

[0030] The end of the pressing rod 11 away from the connecting rod 12 is provided with a pressing seat 16. The pressing seat 16 can be abutted and pressed against the top surface of the pressing cover 3, which can effectively avoid the abrasion of the pressing rod 11 and the outer thread 17, and can effectively realize the repeated use of the tool.

[0031] Further, the pressing seat 16 and the pressing rod 11 are rotatably connected and installed through a rotating piece. During the process that the pressing seat 16 is abutted and pressed against the top surface of the pressing cover 3, the rotating piece is rotated to avoid the relative friction and abrasion between the pressing seat 16 and the pressing cover 3.

[0032] Further, the rotating piece is a thrust bearing. The rotating piece can realize the flexibility and accuracy of the relative rotation between the pressing seat 16 and the pressing rod 11.

[0033] The pressing rod 11 is provided with an annular groove, a limiting ring is rotatably sleeved outside the groove, and a supporting rod 15 is connected to the limiting ring. The supporting rod 15 can be held by hand to realize the auxiliary positioning of the pressing rod 11, the accurate insertion of the pressing rod 11 into the fixed sleeve 2, and the convenience of operation.

[0034] The end of the driving arm 13 away from the connecting rod 12 is provided with a circular table, the diameter of the circular table is greater than the diameter of the driving arm 13, the length of the driving arm 13 is relatively short, and the slot 18 is formed on the circular table. The short and thick structure of the driving arm 13 can effectively improve the strength of the driving arm 13, the driving arm 13 is flexible to rotate, and the convenience of use is improved.

[0035] The present aircraft seat pull handle mounting tool, when in use (when the pull handle 1 is pulled out by mistake), through the free rotation of the two universal joints, the external thread 17 on the pressure rod 11 can be screwed with the fixed sleeve 2 on the aircraft seat, through the wrench and other tools to rotate the driving arm 13, through the steering transmission of the two universal joints, through the transmission of the connecting rod 12, the pressure rod 11 can be screwed into the fixed sleeve 2, so that the lower end of the pressure rod 11 can press down the gland 3, the gland 3 overcomes the elastic force of the spring 4 to press the telescopic rod 5, so that the rotating rod 6 (cam 7) rotates, the steel ball 8 is placed into the cam groove 71, the steel ball 8 can be limited in the limiting range of the cover 9, and the pull handle 1 is reset; the device has the advantages of simple structure, convenient and flexible use, high efficiency in resetting the pull handle 1 of the aircraft seat, avoidance of the situation that the operation space is limited, and good practicability.

[0036] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An aircraft seat pull handle installation tool, characterized by, It comprises a pressing rod (11), a connecting rod (12) and a driving arm (13), the pressing rod (11) is connected with the connecting rod (12) through a universal joint, the end of the connecting rod (12) away from the pressing rod (11) is connected with the driving arm (13) through a universal joint, the driving arm (13) is provided with a slot (18), and the end of the pressing rod (11) away from the connecting rod (12) is provided with an external thread (17) capable of penetrating and screwing with a fixed sleeve (2) on an airplane seat.

2. The aircraft seat pull handle installation tool of claim 1, wherein, It also comprises a ratchet wrench (14) capable of being inserted into the slot (18).

3. The aircraft seat pull handle installation tool of claim 1, wherein, The end of the pressing rod (11) away from the connecting rod (12) is provided with a chamfer.

4. The aircraft seat pull handle installation tool of claim 1, wherein, The end of the pressing rod (11) away from the connecting rod (12) is provided with a pressing base (16).

5. The aircraft seat pull handle installation tool of claim 4, wherein, The pressing base (16) is rotatably connected with the pressing rod (11) through a rotating piece.

6. The aircraft seat pull handle installation tool of claim 5, wherein, The rotating piece is a thrust bearing.

7. The aircraft seat pull handle installation tool of Claim 1, wherein, The pressing rod (11) is provided with an annular groove, a limiting ring is rotatably sleeved outside the groove, and a supporting rod (15) is connected to the limiting ring.

8. The aircraft seat pull handle installation tool of Claim 1, wherein, The end of the driving arm (13) away from the connecting rod (12) is provided with a circular table, the diameter of the circular table is greater than the diameter of the driving arm (13); and the slot (18) is arranged on the circular table.

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