A transmission mechanism for an electric wing folding system

Abstract

The invention discloses a transmission mechanism of a wing electric folding system, comprising a shell and an input shaft. The invention adopts an NGWN (Ⅰ) type gear ring E as a final output, and the gear ring E and a first connecting rod in the folding mechanism are integrally formed, thereby expanding the transmission form of a rotary drive mechanism. The reduction ratio of the NGW type planetary reducer is 2.8-9, and the reduction ratio of the NGWN (Ⅰ) type planetary reducer is 20-100. Under the same volume of the drive mechanism, the use of the NGWN (Ⅰ) type planetary reducer can achieve a higher transmission ratio and can effectively reduce the size of the drive mechanism. The existing NGW type planetary reducer has 3-5 planetary gears, and the number of planetary gears of the invention can be as high as eight, thereby making the mechanism more balanced in force. Since the limit fan ring is used as a mechanical limit device, the gear ring E and the first connecting rod can only rotate within an angle α, so that the transmission mechanism operates within a limited angle, which is beneficial to avoiding the dead point position of the folding mechanism and protecting the safety of the wing folding system.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft, and in particular to a transmission mechanism of an electric wing folding system. Background Art

[0002] Wings are an indispensable part of various fixed-wing aircraft, but when on the ground, wings are useless and take up a lot of space. The development of wing folding technology comes from the need to save deck space on carrier-based fixed-wing aircraft; in addition, since folding wings can reduce the width of the fuselage, it is convenient for aircraft transportation and storage, which also has certain significance for the design of ordinary aircraft.

[0003] The wing folding system usually consists of the fixed end of the wing (inner wing), the movable end of the wing (outer wing), folding mechanism, driving mechanism, control system, locking system, etc.

[0004] The folding mechanism usually uses a connecting rod mechanism, and the driving mechanism is usually realized by a hydraulic linear driving mechanism or a hydraulic motor rotary driving mechanism; two connecting rods in the folding mechanism (connecting rod mechanism) are respectively fixedly connected to the fixed end (inner wing) and the movable end (outer wing) of the wing, and the folding mechanism (connecting rod mechanism) is connected to the driving mechanism (hydraulic linear driving mechanism) through a hinge, or the planetary carrier of the NGW type planetary reducer in the hydraulic motor rotary driving mechanism is fixedly connected to the driving mechanism (hydraulic motor rotary driving mechanism). The driving force provided by the driving mechanism drives the folding mechanism to operate, realizing the folding and unfolding of the movable end of the wing.

[0005] The existing NGW planetary reducer has a relatively small transmission ratio, a large volume, and an unbalanced force on the reducer; after the reducer outputs power, there is a situation where the folding mechanism runs to its dead point, which poses a safety hazard to the wing folding system. Summary of the invention

[0006] The object of the present invention is to provide a transmission mechanism for an electric wing folding system to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A transmission mechanism of an electric wing folding system comprises a shell and an input shaft, wherein the input shaft is arranged in the shell and rotatably connected to the shell, a sun gear A is arranged on the input shaft, a ring gear B is fixedly arranged in the shell, a plurality of planetary shafts are arranged between the ring gear B and the sun gear A, planetary gears C and planetary gears D are respectively arranged at both ends of the planetary shafts, a support ring for limiting the plurality of planetary shafts is also floatingly installed in the shell, the sun gear A, the plurality of planetary gears C and the ring gear B are meshed at the same time, a ring gear E is rotatably connected in the shell, the ring gear E and the plurality of planetary gears D are meshed at the same time, and a first connecting rod of the electric wing folding system is arranged on the outer side of the ring gear E.

[0009] The ring gear E and the first connecting rod are integrally formed.

[0010] The ring gear E is rotatably connected to the housing via a sliding bearing.

[0011] The shell comprises a first half shell and a second half shell buckled with the first half shell, and a limiting sector ring is arranged on opposite sides of the first half shell and the second half shell.

[0012] The gear ring B is arranged in the first half shell and is integrally formed with the first half shell.

[0013] The limit fan ring is provided with a plurality of mounting holes.

[0014] The number of the planet shafts, planet gears C and planet gears D are eight.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention adopts the NGWN (Ⅰ) type gear ring E as the final output, and at the same time the ring E and the first connecting rod in the folding mechanism are integrally formed, thereby expanding the transmission form of the rotary drive mechanism.

[0017] 2. The reduction ratio of NGW planetary reducer is 2.8~9, and the reduction ratio of NGWN(Ⅰ) planetary reducer is 20~100. Under the same volume of the driving mechanism, the use of NGWN(Ⅰ) planetary reducer can achieve a higher transmission ratio. Under the same transmission ratio of the driving mechanism, NGWN(Ⅰ) planetary reducer can effectively reduce the size of the driving mechanism.

[0018] 3. The existing NGW type planetary reducer has 3 to 5 planetary gears, while the number of planetary gears of the present invention can be as high as eight, thereby making the force of the mechanism more balanced.

[0019] 4. Since the limit fan ring serves as a mechanical limit device, the gear ring E and the first connecting rod can only rotate within the angle α, so that the transmission mechanism operates within a limited angle, which is beneficial to avoid the dead point position of the folding mechanism and protect the safety of the wing folding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the mechanical principle diagram of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the present invention;

[0022] Figure 3 It is a cross-sectional structural schematic diagram of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the first half shell in the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the second half shell in the present invention;

[0025] Figure 6 It is a schematic structural diagram of the ring gear E and the first connecting rod in the present invention;

[0026] Figure 7 It is a schematic diagram of the rotation range of the ring gear E in the present invention.

[0027] In the figure: 1-sun gear A, 2-ring gear B, 3-planetary gear C, 4-planetary gear D, 5-support ring, 6-planetary shaft, 7-input shaft, 8-ring gear E, 9-first connecting rod, 10-second connecting rod, 11-housing, 111-first half shell, 112-second half shell, 12-sliding bearing, 13-limiting fan ring, 131-mounting hole. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0029] The folding mechanism of the electric wing folding system is generally composed of a number of connecting rods hinged in sequence, and two of the connecting rods in the folding mechanism are respectively fixedly connected to the fixed end (inner wing) and the movable end (outer wing) of the wing. When one of the connecting rods is driven to rotate, the connecting rods hinged in sequence are driven to rotate, so that the connecting rod fixedly connected to the movable end (outer wing) of the wing rotates to realize the folding of the wing. Figure 1 , showing two links in the folding mechanism (the first link 9 is hinged to the second link 10).

[0030] See also Figures 1 to 7 In an embodiment of the present invention, a transmission mechanism of a wing electric folding system is provided, comprising a housing 11 and an input shaft 7, wherein the input shaft 7 is disposed in the housing 11 and is rotatably connected to the housing 11, see Figure 4 and Figure 5 The housing 11 includes a first half shell 111 and a second half shell 112 that is buckled with the first half shell 111. A limit fan ring 13 is provided on the opposite side of the first half shell 111 and the second half shell 112. The gear ring B2 is provided in the first half shell 111 and is integrally formed with the first half shell 111 or connected by a spline or the like. A plurality of mounting holes 131 are provided on the limit fan ring 13. The first half shell 111 and the second half shell 112 are positioned and (bolted) connected through the plurality of mounting holes 131 on the limit fan ring 13. See Figure 7 Since the limit fan ring 13 serves as a mechanical limit device, the ring gear E8 and the first connecting rod 9 can only rotate within the angle α, so that the transmission mechanism operates within a limited angle, which is beneficial to avoid the dead point position of the folding mechanism and protect the safety of the wing folding system.

[0031] A sun gear A1 is connected to the input shaft 7 via a key or a spline, eight planetary shafts 6 are arranged between the ring gear B2 and the sun gear A1, planetary gears C3 and planetary gears D4 are respectively arranged at both ends of the planetary shafts 6, a support ring 5 for limiting the position of several planetary shafts 6 is also floatingly installed in the housing 11, the sun gear A1, the eight planetary gears C3 and the ring gear B2 are meshed at the same time, a ring gear E8 is rotatably connected in the housing 11 via a sliding bearing 12, and the ring gear E8 and the eight planetary gears D4 are meshed at the same time. The existing NGW type planetary reducer has 3 to 5 planetary gears, and the number of planetary gears in the present invention can be as high as eight, thereby making the force of the mechanism more balanced.

[0032] The gear ring E8 is integrally formed with the first connecting rod 9 of the wing electric folding system. The gear ring E8 serves as both an inner gear ring and a connecting rod, thereby realizing the mechanical connection between the driving mechanism and the folding mechanism.

[0033] The present invention adopts the NGWN (Ⅰ) type output ring gear (ring gear E8) as the final output, and uses the output ring gear as a connecting rod (first connecting rod 9) in the folding mechanism, thereby expanding the transmission form of the rotary drive mechanism. The reduction ratio of the NGW type planetary reducer is 2.8 to 9, and the reduction ratio of the NGWN (Ⅰ) type planetary reducer is 20 to 100. Under the same volume of the drive mechanism, the use of the NGWN (Ⅰ) type planetary reducer can achieve a higher transmission ratio. Under the same transmission ratio of the drive mechanism, the NGWN (Ⅰ) type planetary reducer can effectively reduce the size of the drive mechanism.

[0034] Transmission path:

[0035] The driving mechanism (electric driving mechanism) of the electric folding system transmits power to the input shaft 7. The input shaft 7 rotates, the sun gear A1 rotates, the planetary gear C3 rotates, the planetary gear D4 rotates, the ring gear E8 rotates, and then the first connecting rod 9 rotates, thereby realizing the operation of the driving mechanism driving the folding mechanism, and realizing the folding and unfolding of the movable end of the wing.

[0036] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A transmission mechanism for an electric wing folding system, comprising a housing (11) and an input shaft (7), characterized in that: The input shaft (7) is arranged in the housing (11) and is rotatably connected to the housing (11). A sun gear A (1) is arranged on the input shaft (7). A ring gear B (2) is fixedly arranged in the housing (11). A plurality of planetary shafts (6) are arranged between the ring gear B (2) and the sun gear A (1). Planetary gears C (3) and planetary gears D (4) are respectively arranged at both ends of the planetary shafts (6). A support ring (5) for limiting the plurality of planetary shafts (6) is also floatingly installed in the housing (11). The sun gear A (1), the plurality of planetary gears C (3) and the ring gear B (2) are meshed at the same time. A ring gear E (8) is rotatably connected in the housing (11). The ring gear E (8) and the plurality of planetary gears D (4) are meshed at the same time. A first connecting rod (9) of the wing electric folding system is arranged outside the ring gear E (8).

2. The transmission mechanism of the electric wing folding system according to claim 1, characterized in that: The ring gear E (8) and the first connecting rod (9) are integrally formed.

3. The transmission mechanism of the electric wing folding system according to claim 1, characterized in that: The ring gear E (8) is rotatably connected to the housing (11) via a sliding bearing (12).

4. The transmission mechanism of the electric wing folding system according to claim 1, characterized in that: The housing (11) comprises a first half shell (111) and a second half shell (112) buckled with the first half shell (111), and a limiting sector ring (13) is provided on opposite sides of the first half shell (111) and the second half shell (112).

5. The transmission mechanism of the electric wing folding system according to claim 4, characterized in that: The gear ring B (2) is arranged in the first half shell (111) and is integrally formed with the first half shell (111).

6. The transmission mechanism of the electric wing folding system according to claim 4, characterized in that: The limiting sector ring (13) is provided with a plurality of mounting holes (131).

7. The transmission mechanism of the electric wing folding system according to claim 1, characterized in that: The number of the planet shafts (6), planet gears C (3) and planet gears D (4) is eight.

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