Undercarriage wheel fake part for strength test of integrated lever loading system

Abstract

The utility model belongs to the field of aircraft landing gear structural strength tests, and particularly relates to a landing gear wheel fake part for a strength test of an integrated lever loading system. The wheel fake part comprises a lever wheel fake part body which comprises a wheel fake part body middle section, a wheel fake part body left section and a wheel fake part body right section, wherein the wheel fake part body left section and the wheel fake part body right section are symmetrically arranged on the left side and the right side of the wheel fake part body middle section. The two vertical loading joints are respectively hinged to lug holes in the end parts of the left section and the right section of the airplane wheel fake piece main body through bolts; the two lateral loading connectors are fixed to the upper ends of the front side and the rear side of the middle section of the airplane wheel fake part body through bolts respectively. The fake wheel main shaft sleeve is welded to the lower end of the middle section of the airplane wheel fake piece main body, the fake wheel main shaft sleeve is sleeved with a course loading shaft sleeve, and double-lug connectors are arranged at the two ends of the course loading shaft sleeve; the two ends of each course loading pull rod are provided with single-lug connectors, and the single-lug connectors of the two course loading pull rods are hinged to the double-lug connectors at the two ends of the course loading shaft sleeve.

Description

Technical Field

[0001] This application belongs to the field of aircraft landing gear structural strength testing, and specifically relates to a landing gear wheel dummy for strength testing using an integrated lever loading system. Background Technology

[0002] In the static and fatigue strength tests of landing gear structures, it is necessary to design wheel dummy parts and design loading joints on the dummy parts to apply yaw, vertical and lateral loads.

[0003] Traditionally, wheel dummy components were designed with loading points near the wheel axle, such as... Figure 1 As shown, however, it will interfere with and be difficult to load when encountering a compact landing gear structure with complex design.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Utility Model Content

[0005] The purpose of this application is to provide a landing gear wheel dummy for strength testing using an integrated lever loading system, in order to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A landing gear wheel dummy for strength testing using an integrated lever loading system, comprising:

[0008] The lever wheel dummy body includes a middle section of the wheel dummy body, a left section of the wheel dummy body symmetrically arranged on the left and right sides of the middle section of the wheel dummy body, and a right section of the wheel dummy body;

[0009] The vertical loading joint includes two joints, which are respectively bolted to the lugs at the left and right ends of the dummy wheel body.

[0010] The lateral loading joint includes two joints, which are respectively fixed to the upper ends of the front and rear sides of the middle section of the dummy wheel body by bolts.

[0011] A dummy wheel main shaft sleeve is welded to the lower end of the middle section of the dummy wheel body. A yaw loading bushing is fitted on the dummy wheel main shaft sleeve, and double-ear joints are provided at both ends of the yaw loading bushing.

[0012] The heading loading tie rod includes two rods, each with a single-ear connector at both ends. The single-ear connectors of the two heading loading tie rods are hinged to the double-ear connectors at both ends of the heading loading bushing.

[0013] In at least one embodiment of this application, the lever wheel dummy body includes a reinforcing frame and a web plate welded to the reinforcing frame.

[0014] In at least one embodiment of this application, a vertical loading joint bearing is installed in the ear hole of the vertical loading joint.

[0015] In at least one embodiment of this application, a lateral loading joint bearing is installed in the ear hole of the lateral loading joint.

[0016] In at least one embodiment of this application, the single-ear joints of the two heading load tie rods are respectively hinged to the double-ear joints at both ends of the heading load bushing via pins.

[0017] In at least one embodiment of this application, when the landing gear is loaded, the dummy wheel spindle sleeve is fitted onto the landing gear axle.

[0018] In at least one embodiment of this application, when the landing gear is loaded, the vertical loading joint, the lateral loading joint, and the yaw loading rod are respectively connected to the actuator cylinder.

[0019] The utility model has at least the following beneficial technical effects:

[0020] The landing gear wheel dummy for strength testing using the integrated lever loading system of this application can apply loads to compact and complex landing gear structures. It integrates vertical load equal-arm loading levers to reasonably avoid the landing gear structure, and at the same time achieves the correct application of yaw, vertical and lateral loads without generating unnecessary forces and moments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a traditional landing gear loader wheel dummy;

[0022] Figure 2 This is an exploded view of a landing gear wheel dummy used for strength testing of an integrated lever loading system according to one embodiment of this application;

[0023] Figure 3 This is a top view of a landing gear wheel dummy used for strength testing of an integrated lever loading system according to one embodiment of this application.

[0024] in:

[0025] 1-Vertical loading joint; 2-Vertical loading spherical bearing; 3-Lever wheel dummy body; 4-Side loading joint; 5-Side loading spherical bearing; 6-Dummy wheel main shaft sleeve; 7-Yaw loading tie rod; 8-Yaw loading bushing. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0028] The following is in conjunction with the appendix Figures 2 to 3 This application will be described in further detail.

[0029] This application provides a landing gear wheel dummy for strength testing of an integrated lever loading system, comprising: a vertical loading joint 1, a vertical loading spherical bearing 2, a lever wheel dummy body 3, a lateral loading joint 4, a lateral loading spherical bearing 5, a dummy wheel main shaft sleeve 6, a yaw loading tie rod 7, and a yaw loading bushing 8.

[0030] Specifically, such as Figure 1-2 As shown, the lever wheel dummy body 1 has an inverted V-shaped structure, including a middle section of the dummy body, a left section of the dummy body symmetrically arranged on the left and right sides of the middle section, and a right section of the dummy body. In a preferred embodiment of this application, the lever wheel dummy body 1 includes a reinforcing frame and web plates welded to the reinforcing frame. In this embodiment, there are two web plates: a front web plate and a rear web plate. Preferably, weight-reducing holes are provided on the web plates.

[0031] The vertical loading joint 1 includes two joints, which are respectively bolted to the lugs at the left and right ends of the dummy wheel body. Preferably, a vertical loading spherical bearing 2 is installed in the lug of the vertical loading joint 1.

[0032] The lateral loading joint 4 includes two parts, which are respectively fixed to the upper ends of the front and rear sides of the middle section of the wheel dummy body by bolts. Preferably, a lateral loading spherical bearing 5 is installed in the ear hole of the lateral loading joint 4.

[0033] Furthermore, the dummy wheel main shaft sleeve 6 is welded to the lower end of the middle section of the dummy wheel body. A directional loading bushing 8 is fitted onto the dummy wheel main shaft sleeve 6, and double-eared joints are provided at both ends of the directional loading bushing 8. Two directional loading rods 7 are included, each with a single-eared joint at both ends. The single-eared joints of the two directional loading rods 7 are hinged to the double-eared joints at both ends of the directional loading bushing 8. In a preferred embodiment of this application, the single-eared joints of the two directional loading rods 7 are respectively hinged to the double-eared joints at both ends of the directional loading bushing 8 via pins. During landing gear loading, the dummy wheel main shaft sleeve 6 is fitted onto the landing gear axle, and the vertical loading joint 1, the lateral loading joint 4, and the directional loading rods 7 are respectively connected to the actuator cylinder.

[0034] The landing gear wheel dummy used for the strength test of the integrated lever loading system of this application is performed according to the following steps during the assembly of the wheel dummy and the implementation of landing gear loading:

[0035] a. The heading loading bushing 8 is fitted onto the dummy wheel main shaft sleeve 6, and the two parts can rotate freely.

[0036] b. The front and rear web plates of the lever wheel dummy body 3 and the dummy wheel main shaft sleeve 6 are welded together;

[0037] c. The heading loading tie rod 7 is connected to the double-ear joints on both sides of the heading loading bushing 8 via a pin.

[0038] d. The lateral loading joint 4 is fixed to the upper middle section of the lever wheel dummy body 3 by four bolts;

[0039] e. The lateral loading spherical bearing 5 is cold-pressed into the ear hole of the lateral loading connector 4;

[0040] f. The vertical loading spherical bearing 2 is cold-pressed into the ear hole of the vertical loading connector 1;

[0041] g. Vertical loading joint 1 is bolted to the lugs at the left end of the dummy wheel body and the right end of the dummy wheel body;

[0042] h. After the entire wheel dummy assembly is completed, the middle dummy wheel main shaft sleeve 6 of the wheel dummy is fitted onto the landing gear axle;

[0043] i. Vertical loading joint 1, yaw loading tie rod 7, and lateral loading joint 4 are connected to the actuators respectively. During the landing gear strength test, loads are applied through the actuators in three directions. Due to the use of spherical bearings and reversing joint design, the load loading in the three directions is guaranteed to be independent.

[0044] The landing gear wheel dummy of the integrated lever loading system of this application is used for load application on compact and complex landing gear structures. The wheel dummy integrates components such as vertical load equal arm loading lever, yaw load reversing loading joint, and lateral load loading joint, which can realize load application in three directions.

[0045] The landing gear wheel dummy for strength testing of the integrated lever loading system of this application has the following advantages:

[0046] (1) By utilizing the design of the integrated curved beam lever system, the structure near the landing gear wheel axle is avoided, thus realizing the application of vertical loads on the compact and complex landing gear structure;

[0047] (2) The yaw loading bushing 8 and the lever wheel dummy body 3 are designed separately. The yaw loading bushing 8 can rotate laterally along the dummy wheel main shaft sleeve 6. The yaw loading tie rod 7 is connected to the double-ear joints on both sides of the yaw loading bushing 8 through the pin. The yaw loading tie rod 7 can rotate vertically around the pin.

[0048] (3) The lateral loading joint 4 is arranged at the tire grounding point at the top of the middle part of the lever wheel dummy body 3. A spherical bearing is installed in the single ear hole of the lateral loading joint 4 so that no extra force and torque are generated when the lateral load is applied.

[0049] (4) Vertical, yaw and lateral loads are applied without interference.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A landing gear wheel dummy for strength testing using an integrated lever loading system, characterized in that, include: The lever wheel dummy body (3) includes a middle section of the wheel dummy body, a left section of the wheel dummy body symmetrically arranged on the left and right sides of the middle section of the wheel dummy body, and a right section of the wheel dummy body; The vertical loading joint (1) includes two, and the two vertical loading joints (1) are respectively bolted to the lugs at the left end of the dummy wheel body and the right end of the dummy wheel body; The lateral loading joint (4) includes two, and the two lateral loading joints (4) are respectively fixed to the upper ends of the front and rear sides of the middle section of the wheel dummy body by bolts; A dummy wheel main shaft sleeve (6) is welded to the lower end of the middle section of the dummy wheel body. A yaw loading bushing (8) is fitted on the dummy wheel main shaft sleeve (6). Double-ear joints are provided at both ends of the yaw loading bushing (8). The heading loading tie rod (7) includes two rods, each with a single-ear connector at both ends. The single-ear connectors of the two heading loading tie rods (7) are hinged to the double-ear connectors at both ends of the heading loading bushing (8).

2. The landing gear wheel dummy for strength testing of the integrated lever loading system according to claim 1, characterized in that, The lever wheel dummy body (3) includes a reinforcing frame and a web plate welded to the reinforcing frame.

3. The landing gear wheel dummy for strength testing of the integrated lever loading system according to claim 1, characterized in that, A vertical loading spherical bearing (2) is installed in the ear hole of the vertical loading joint (1).

4. The landing gear wheel dummy for strength testing of the integrated lever loading system according to claim 1, characterized in that, A lateral loading spherical bearing (5) is installed in the ear hole of the lateral loading joint (4).

5. The landing gear wheel dummy for strength testing of the integrated lever loading system according to claim 1, characterized in that, The single-ear joints of the two heading load tie rods (7) are respectively hinged to the double-ear joints at both ends of the heading load bushing (8) via pins.

6. The landing gear wheel dummy for strength testing of the integrated lever loading system according to claim 1, characterized in that, When the landing gear is loaded, the dummy wheel spindle sleeve (6) is fitted onto the landing gear axle.

7. The landing gear wheel dummy for strength testing of the integrated lever loading system according to claim 1, characterized in that, When the landing gear is loaded, the vertical loading joint (1), the lateral loading joint (4), and the yaw loading tie rod (7) are respectively connected to the actuator cylinder.

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