Airplane pedal initial position adjusting mechanism

Abstract

The utility model discloses an aircraft pedal initial position adjusting mechanism. Comprising an inclined transmission rod, the head end of the inclined transmission rod is connected with the tail end of a horizontal transmission rod through a universal joint A, the head end of the horizontal transmission rod is connected with a screw through a universal joint B, a rotating rocker arm is in threaded connection with a screw body, the two ends of the rotating rocker arm are hinged to the head end of a pull rod, the tail end of the pull rod is hinged to a pedal rocker arm, and the pedal rocker arm is hinged to a pedal. A front limiting support and a rear limiting support are connected to the portions, located on the front side and the rear side of the rotating rocker arm, of the screw body respectively and connected through a sliding rail, and the sliding rail is further connected with the rotating rocker arm in a sliding mode through a guide sleeve. A front limiting bush is arranged on the screw rod between the front limiting support and the rotating rocker arm; and a rear limiting bush is arranged on the screw rod between the rear limiting support and the rotating rocker arm. The utility model solves the problem that the conventional aircraft foot control mechanism is tight or blocked after being adjusted to a front limit position or a rear limit position.

Description

Technical Field

[0001] The utility model belongs to the technical field of foot control devices in aircraft control systems and relates to an aircraft pedal initial position adjustment mechanism. Background Art

[0002] The foot control device provides the pilot with heading control input. To adapt to the different heights of pilots, the front and rear positions of the two pedals corresponding to the rudder in the neutral position should be adjustable. Two types of foot control devices are introduced in Section 1.7.2.1 of the Aircraft Design Manual (Volume 12).

[0003] Chinese patent publication number CN201566838U, publication date September 1, 2010, titled "An aircraft stand-up foot-operated adjustment mechanism", discloses an aircraft pedal adjustment mechanism, which has the problem that during actual use by the user, after the pedal is adjusted to the front limit position or the rear limit position, the pedal adjustment is tight and difficult, and in severe cases, the pedal becomes stuck and cannot be adjusted any more, requiring the adjustment mechanism to be disassembled and reinstalled to eliminate the fault. Utility Model Content

[0004] The utility model aims to provide an aircraft pedal initial position adjustment mechanism, which overcomes the problem of tightness or stagnation in the existing aircraft pedal control mechanism after being adjusted to the front limit position or the rear limit position.

[0005] Technical solution. An aircraft pedal initial position adjustment mechanism comprises an inclined transmission rod, the head end of the inclined transmission rod is connected to the tail end of the horizontal transmission rod via a universal joint A, the head end of the horizontal transmission rod is connected to a screw rod via a universal joint B, a rotating rocker arm is threadedly connected to the screw rod body, both ends of the rotating rocker arm are hinged to the head end of the pull rod, the tail end of the pull rod is hinged to the pedal rocker arm, and the pedal rocker arm is hinged to the pedal; a front limit support and a rear limit support are respectively connected to the screw rod body at the front and rear sides of the rotating rocker arm, the front and rear limit supports are connected via a slide rail, and the slide rail is also slidably connected to the rotating rocker arm via a guide sleeve; a front limit bushing is provided on the screw rod between the front limit support and the rotating rocker arm, and a rear limit bushing is provided on the screw rod between the rear limit support and the rotating rocker arm.

[0006] In the aforementioned aircraft pedal initial position adjustment mechanism, the tail end of the inclined transmission rod is connected to an adjustment handle.

[0007] In the aforementioned aircraft pedal initial position adjustment mechanism, the slide rail is slidably connected to the rotary rocker arm via a slide sleeve.

[0008] In the aforementioned aircraft pedal initial position adjustment mechanism, the front and rear limit bushings are both threadedly connected to the screw rod.

[0009] In the aforementioned aircraft pedal initial position adjustment mechanism, the slide rails include two and are symmetrical about the axis of the screw.

[0010] In the aforementioned aircraft pedal initial position adjustment mechanism, the adjustment handle is arranged beside the pedal.

[0011] Beneficial Effects

[0012] The utility model analyzes the jamming failure of the existing adjustment mechanism, and finally finds that the reason for the jamming is that when the rotating rocker arm moves to the front / rear limit position, it is limited by the guide sleeves at both ends that are slidably connected to the slide rail. At this time, due to the superposition of various errors, it is easy to cause one of the guide sleeves to move to the position and contact the front / rear limit support, while the other guide sleeve has not moved to the position and still does not contact the front / rear limit support; in this case, the rotating rocker arm is unevenly stressed, resulting in the jamming of the entire mechanism; after analyzing the cause of the failure, the utility model adds a limit bushing to the front and rear positions of the screw of the adjustment mechanism, so that the limit of the rotating arm at the limit position is changed from the traditional limit of the guide sleeves at both ends to the limit of the bushing in the middle, effectively avoiding the jamming problem caused by uneven force when the mechanism is limited. The utility model is simple to install and adjust, and the mechanism is flexible during the adjustment process. The products that have been delivered to users are simple to modify, avoiding the inability to adjust the pedal position to affect the aircraft attendance rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the front view of the structure of the utility model;

[0014] Figure 2 It is a top view of the structure of the utility model.

[0015] Figure markings: 1- inclined transmission rod, 2- universal joint A, 3- horizontal transmission rod, 4- universal joint B, 5- screw rod, 6- rotating rocker arm, 7- pull rod, 8- pedal rocker arm, 9- pedal, 10- front limit support, 11- rear limit support, 12- slide rail, 13- front limit bushing, 14- rear limit bushing, 15- adjustment handle, 16- guide sleeve. DETAILED DESCRIPTION

[0016] Combined with the accompanying drawings, the utility model is described in detail about an aircraft pedal initial position adjustment mechanism:

[0017] Embodiment 1. An aircraft pedal initial position adjustment mechanism, comprising: Figure 1-Figure 2As shown, it includes an inclined transmission rod 1, the head end of the inclined transmission rod 1 is connected to the tail end of the horizontal transmission rod 3 via a universal joint A2, the head end of the horizontal transmission rod 3 is connected to the screw rod 5 via a universal joint B4, a rotating rocker arm 6 is threadedly connected to the rod body of the screw rod 5, both ends of the rotating rocker arm 6 are hinged to the head end of the pull rod 7, the tail end of the pull rod 7 is hinged to the pedal rocker arm 8, and the pedal rocker arm 8 is hinged to the pedal 9; a front limit support 10 and a rear limit support 11 are also connected to the rod body of the screw rod 5 at the front and rear sides of the rotating rocker arm 6 respectively, the front and rear limit supports are connected via a slide rail 12, and the slide rail 12 is also slidably connected to the rotating rocker arm 6 via a guide sleeve 16; a front limit bushing 13 is provided on the screw rod 5 between the front limit support 10 and the rotating rocker arm 6, and a rear limit bushing 14 is provided on the screw rod 5 between the rear limit support 11 and the rotating rocker arm 6.

[0018] The pilot drives the pedal rocker arm 8 by stepping on the pedal 9 to transfer the movement to the pull rod 8, which transfers the movement to the lower-level system.

[0019] The tail end of the aforementioned inclined transmission rod 1 is connected with an adjustment handle 15 .

[0020] The aforementioned slide rail 12 is slidably connected to the rotary rocker arm 6 via a slide sleeve 16 .

[0021] The front and rear limit bushings are both threadedly connected to the screw rod 5 .

[0022] The aforementioned slide rails 12 include two and are symmetrical about the axis of the screw rod 5 .

[0023] The aforementioned adjustment handle 15 is arranged beside the pedal 9 .

[0024] When the pilot needs to adjust the distance between the pedal 9 and the pilot on the ground, he only needs to turn the adjustment handle 15 clockwise or counterclockwise. The adjustment handle 15 drives the inclined transmission rod 1 to rotate, and transmits the rotational motion to the horizontal transmission rod 3 through the universal joint A2, and then transmits it to the screw 5 through the universal joint B4. The rotation of the screw 5 drives the rotating rocker 6 to move linearly along the axis of the screw 5. Through the installed front limit bushing 13 and rear limit bushing 14, the rotating rocker 6 is at the extreme position, and the guide sleeve on the rotating arm does not contact the front / rear limit support. The screw in the middle of the rotating rocker 6 contacts the front / rear limit support through the front / rear limit bushing. At this time, the limit position of the mechanism is set in the middle of the mechanism, which can avoid the jamming problem caused by uneven force when the mechanism is limited, so that the position of the pedal moves smoothly. That is, the front and rear positions of the pedal are driven to change to achieve the purpose of adjusting the distance from the pilot, and at the same time, the jamming problem caused by uneven force when the mechanism is limited is avoided.

Claims

1. An aircraft pedal initial position adjustment mechanism, characterized in that: The invention comprises an inclined transmission rod (1), wherein the head end of the inclined transmission rod (1) is connected to the tail end of a horizontal transmission rod (3) via a universal joint A (2), the head end of the horizontal transmission rod (3) is connected to a screw rod (5) via a universal joint B (4), a rotating rocker arm (6) is threadedly connected to the body of the screw rod (5), both ends of the rotating rocker arm (6) are hinged to the head end of a pull rod (7), the tail end of the pull rod (7) is hinged to a pedal rocker arm (8), and the pedal rocker arm (8) is hinged to a pedal (9); a rotating rocker arm (6) is located in front of the rotating rocker arm (6) and the rotating rocker arm (6) is connected to the head end of a pull rod (7). A front limit support (10) and a rear limit support (11) are respectively connected to the rod body of the screw rod (5) on the front and rear sides; the front and rear limit supports are connected via a slide rail (12); the slide rail (12) is also slidably connected to the rotary rocker arm (6) via a guide sleeve (16); a front limit bushing (13) is provided on the screw rod (5) between the front limit support (10) and the rotary rocker arm (6); a rear limit bushing (14) is provided on the screw rod (5) between the rear limit support (11) and the rotary rocker arm (6).

2. The aircraft pedal initial position adjustment mechanism according to claim 1, characterized in that: The tail end of the oblique transmission rod (1) is connected with an adjustment handle (15).

3. The aircraft pedal initial position adjustment mechanism according to claim 1, characterized in that: The slide rail (12) is slidably connected to the rotary rocker arm (6) via a guide sleeve (16).

4. The aircraft pedal initial position adjustment mechanism according to claim 1, characterized in that: The front and rear limiting bushings are both threadedly connected to the screw rod (5).

5. The aircraft pedal initial position adjustment mechanism according to claim 1, characterized in that: The slide rails (12) include two and are symmetrical about the axis of the screw rod (5).

6. The aircraft pedal initial position adjustment mechanism according to claim 2, characterized in that: The adjustment handle (15) is arranged beside the pedal (9).

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