Measuring device for aircraft pedal stroke limit actuator cylinder

Abstract

The utility model discloses a measuring device for an aircraft pedal stroke limit actuator cylinder, which belongs to the technical field of aviation detection and comprises a vertical plate, a long cross rod, a meter clamp, a threaded rod and a separation blade. The threaded rod is in threaded fit with an inner hole of the hydraulic lock, the blocking piece serves as a measuring upper end face, the upper end of the vertical plate is welded to the long transverse rod to form a right-angle structure, the lower end of the vertical plate is fixed to the bottom end of the hydraulic lock, and the bottom end of the hydraulic lock serves as an installation reference. The upper end of the gauge stand sleeves the long cross bar, and the lower end clamps the dial gauge to measure the moving distance of the separation blade. According to the utility model, the probing thread and the hydraulic lock form a whole, the measurement mode is simple and efficient, the measurement method is accurate and practical, a pure mechanical structure is adopted, and no safety problem is involved.

Description

Technical Field

[0001] This utility model belongs to the field of aviation testing technology and relates to a measuring device for the travel limit actuator of an aircraft foot pedal. Background Technology

[0002] During a major overhaul of a certain type of aircraft, it is necessary to measure the clearance of the pedal travel limit actuator. After measurement, the parameters of the hydraulic lock of the pedal travel limit actuator need to be determined. Specifically, when the pedal travel limit actuator is subjected to a load P = 2942 + 2450 N, the movement clearance of the hydraulic lock should not exceed 0.4 mm. Currently, manual measurement with handheld measuring tools is used, and the dimensions measured by general-purpose tooling are the entire product's cross-movement under stress, which does not meet the measurement requirements. In principle, the bottom end face of the product part should be used for positioning as the measurement reference for the product end face. Then, a special probe-type end face screw should be used to connect with the product's internal groove to form an effective measurement end face, making the entire measuring device a whole with the product as the measurement unit. This will ensure the accuracy, sensitivity, and safety of the pedal travel limit actuator operation after the aircraft takes off. Utility Model Content

[0003] This invention provides a measuring device for the pedal travel limit actuator of an aircraft. Using the bottom end of the hydraulic lock as the installation reference, and the upper end face of the probe-threaded actuator integrated with the hydraulic lock as the measuring end face, the measurement method is simple, efficient, accurate, and practical. Finally, after adjusting the parameters of the pedal travel limit actuator, the parameters of the hydraulic lock are confirmed. This invention can quickly adjust the clearance of the pedal travel limit actuator, ensuring accurate, sensitive, and safe operation of the actuator in the control system of a certain type of aircraft after takeoff. It employs a purely mechanical structure and does not involve any safety issues.

[0004] The present invention adopts the following technical solution:

[0005] A measuring device for limiting the travel of an aircraft foot pedal actuator includes a vertical plate 1, a long horizontal bar 2, a gauge clamp 3, a threaded rod 4, a baffle 5, and a hand-tightening nut 6.

[0006] One end of the threaded rod 4 is welded and fixed to the baffle 5 to form an L-shaped structure, and the other end of the threaded rod 4 is threaded into the inner hole of the hydraulic lock. After the L-shaped structure is connected to the hydraulic lock, the baffle 5 serves as the upper end face of the hydraulic lock for measurement.

[0007] The upper end of the upright plate 1 is welded and fixed to one end of the long crossbar 2 to form a right-angle structure. A round hole is made at the lower end of the upright plate 1, and the bottom end of the hydraulic lock is inserted and fixed, with the bottom end of the hydraulic lock itself as the installation reference.

[0008] The upper end of the dial indicator clamp 3 is fitted onto the other end of the long horizontal bar 2 and clamped by a hand-twisting nut 6. The lower end clamps the dial indicator by a hand-twisting nut 6. By controlling the dial indicator clamp 3 to slide on the long horizontal bar 2, the dial indicator probe measures the moving distance of the baffle 5, thereby measuring the compression length of the spring structure in the inner hole of the hydraulic lock, and performing measurements within the range.

[0009] In use: Fix the bottom end of the hydraulic lock onto the upright plate 1. Using the bottom end of the hydraulic lock as the installation reference, screw the threaded rod 4 into the inner hole of the hydraulic lock until it contacts the spring structure. At this time, the spring structure is in the maximum limit position, and the baffle 5 serves as the upper end face for measuring the hydraulic lock. Install the dial indicator clamp on the lower end of the clamp 3, so that its probe contacts the baffle 5 and the dial indicator is zeroed, which serves as the starting point for measurement. Tighten the threaded rod 4 to the required position, move the clamp 3 until the dial indicator probe contacts the baffle 5 again, read the dial indicator reading, and confirm the parameters of the hydraulic lock after adjusting the parameters of the foot pedal travel limiting actuator.

[0010] The beneficial effects of this utility model are as follows: This utility model integrates an insert-type thread with a hydraulic lock into a single unit, resulting in a simple and efficient measurement method that is accurate and practical. It employs a purely mechanical structure and does not involve any safety issues. This utility model offers accuracy, practicality, and flexibility, reducing the likelihood of hydraulic lock failure due to inaccurate adjustment of the pedal travel limit actuator, and improving the accuracy and sensitivity of the pedal travel limit actuator in the control system of a certain type of aircraft after takeoff, thus reducing reaction time. Attached Figure Description

[0011] Figure 1 This is an overall structural diagram of the present invention, wherein (a) is the front view and (b) is the view from direction A.

[0012] Figure 2 This is a schematic diagram of the vertical plate structure, where (a) is the front view and (b) is the side view.

[0013] Figure 3 This is a schematic diagram of a long horizontal bar structure.

[0014] Figure 4 The diagram shows the structure of the watch clip, where (a) is the front sectional view and (b) is the side view.

[0015] Figure 5 This is a schematic diagram of a threaded rod structure.

[0016] Figure 6 This is a schematic diagram of the baffle structure.

[0017] Figure 7 This is a schematic diagram of a hand-twisted nut.

[0018] The components include: 1. Vertical plate; 2. Long horizontal bar; 3. Table clamp; 4. Threaded rod; 5. Stop plate; and 6. Hand-tight nut. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0020] A measuring device for an aircraft treadmill travel limit actuator includes a vertical plate 1, a long horizontal bar 2, a gauge clamp 3, a threaded rod 4, a stop plate 5, and a hand-tightening nut 6. Figure 1 .

[0021] like Figure 5 One end of the threaded rod 4 is connected to the baffle 5 (e.g. Figure 6 The L-shaped structure is formed by welding and fixing. After welding, the whole surface is treated with blueing and rust prevention. The other end of the threaded rod 4 is threaded with the inner hole of the hydraulic lock. After the L-shaped structure is connected to the hydraulic lock, the baffle 5 serves as the upper end face of the hydraulic lock for measurement.

[0022] like Figure 2 The upper end of the upright plate 1 is connected to the long horizontal bar 2 (such as...) Figure 3 One end is welded and fixed to form a right-angle structure. After welding, the whole product is treated with blueing and rust prevention. A round hole is made at the bottom of the upright plate 1, and the bottom of the hydraulic lock is inserted and fixed. The bottom of the hydraulic lock itself is used as the installation reference.

[0023] like Figure 4 The upper end of the watch clip 3 is fitted onto the other end of the long crossbar 2 and secured by a hand-tightened nut 6 (e.g., Figure 7 The dial indicator is clamped at the lower end by hand-twisting the nut 6. The dial indicator clamp 3 is controlled to slide on the long horizontal bar 2, so that the dial indicator probe measures the moving distance of the baffle 5, thereby measuring the compression length of the spring structure in the inner hole of the hydraulic lock, and performing measurements within the range.

[0024] In use: Fix the bottom end of the hydraulic lock onto the upright plate 1. Using the bottom end of the hydraulic lock as the installation reference, screw the threaded rod 4 into the inner hole of the hydraulic lock until it contacts the spring structure. At this time, the spring structure is in the maximum limit position, and the baffle 5 serves as the upper end face for measuring the hydraulic lock. Install the dial indicator clamp on the lower end of the clamp 3, so that its probe contacts the baffle 5 and the dial indicator is zeroed, which serves as the starting point for measurement. Tighten the threaded rod 4 to the required position, move the clamp 3 until the dial indicator probe contacts the baffle 5 again, read the dial indicator reading, and confirm the parameters of the hydraulic lock after adjusting the parameters of the foot pedal travel limiting actuator.

[0025] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A measuring device for the travel limit actuator of an aircraft pedal, characterized in that, Includes upright plate (1), long horizontal bar (2), dial clip (3), threaded rod (4), and baffle plate (5); One end of the threaded rod (4) is fixed to the baffle (5) to form an L-shaped structure, and the other end of the threaded rod (4) is threaded into the inner hole of the hydraulic lock. By turning the threaded rod (4), the spring structure inside the hydraulic lock is pushed. The baffle (5) serves as the upper end face of the hydraulic lock for measurement. The upper end of the upright plate (1) is fixed to one end of the long crossbar (2) to form a right angle structure, and the lower end of the upright plate (1) is fixed to the bottom end of the hydraulic lock, with the bottom end of the hydraulic lock itself as the installation reference. The upper end of the dial clamp (3) is movably mounted on the other end of the long horizontal bar (2), and the lower end holds the dial indicator. By controlling the dial clamp (3) to slide on the long horizontal bar (2), the moving distance of the dial indicator probe measuring the baffle (5) is achieved.

2. The measuring device for the travel limit actuator of an aircraft pedal according to claim 1, characterized in that, The upright plate (1) has a round hole, which is then fitted into the bottom end of a hydraulic lock for fixation.

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