Method for measuring pre-tightening force of windshield wiper of airplane

Abstract

The invention belongs to the technical field of airplane windshield wiper pre-tightening force measurement, and particularly relates to an airplane windshield wiper pre-tightening force measurement method, which comprises the following steps: step 1, lifting a windshield wiper, placing a filler gauge between the windshield wiper and the windshield, putting down the windshield wiper, and pressing the filler gauge on the windshield; 2, a pre-tightening force dynamometer is connected with the windshield wiper, and the windshield wiper is slowly pulled upwards in the normal direction of the windshield wiper; and step 3, when the feeler gauge slides off between the windshield wiper and the windshield, stopping pulling the windshield wiper, and reading the reading of the pre-tightening force dynamometer to obtain the pre-tightening force of the windshield wiper of the airplane.

Description

Technical Field

[0001] This application belongs to the field of aircraft windshield wiper preload measurement technology, specifically relating to a method for measuring aircraft windshield wiper preload. Background Technology

[0002] During the installation of aircraft windshield wipers, it is essential to ensure that their preload is within the specified range to prevent problems such as wipers lifting off the windshield or scratching the windshield during use.

[0003] Currently, the windshield wipers are manually pulled up to a set height along the normal direction of the aircraft windshield using a force gauge to measure the preload. This technical solution relies on visual judgment of the wiper height. However, due to the large visual error, it cannot accurately determine whether the wiper has been pulled up to the set height. Therefore, it cannot achieve stable and accurate measurement of the wiper preload, often resulting in the windshield wiper installation preload being too high or too low, frequently causing problems such as wipers floating up or scratching the windshield.

[0004] This application is made in view of the aforementioned technical deficiencies. Summary of the Invention

[0005] The purpose of this application is to provide a method for measuring the preload of aircraft windshield wipers. By installing a feeler gauge between the wiper and the windshield, the slippage of the feeler gauge is used as a criterion for judging whether the wiper has been pulled up to a set height. This reduces the influence of visual error on the measurement of wiper preload, achieves stable and accurate measurement of wiper preload, ensures that the preload of the aircraft windshield wipers is within the specified range, and avoids problems such as wipers floating up or scratching the windshield during use.

[0006] The technical solution of this application is:

[0007] A method for measuring the preload of an aircraft windshield wiper includes:

[0008] Step 1: Lift up the windshield wipers, place a feeler gauge between the wipers and the windshield, lower the wipers, and press the feeler gauge firmly against the windshield.

[0009] Step 2: Connect the windshield wiper to the preload gauge and slowly pull the wiper upwards along the windshield normal.

[0010] Step 3: When the feeler gauge slides between the wiper and the windshield, stop pulling the wiper and read the reading of the preload gauge to obtain the windshield wiper preload.

[0011] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step one, a feeler gauge is suspended from the top of the windshield by a suspension line. A suspension force gauge and a telescopic rod are provided on the suspension line. Before placing the feeler gauge between the wiper and the windshield, the feeler gauge is allowed to slide down the windshield naturally, and the reading of the suspension force gauge is recorded as the standard tension.

[0012] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, the telescopic rod is composed of two sections connected by a thread and extends or retracts by rotation.

[0013] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step one, the feeler gauge is placed at 2 / 3 to 4 / 5 of the wiper length.

[0014] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, the thickness of the feeler gauge does not exceed 1 mm.

[0015] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, the thickness of the feeler gauge is 0.9 mm.

[0016] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step one, before placing the feeler gauge between the wiper and the windshield, the surfaces of the wiper and the windshield at the place where the feeler gauge is placed are wiped clean to ensure that there is no dirt or water stains.

[0017] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step one, when the feeler gauge is placed between the wiper and the windshield, the placement position of the feeler gauge is adjusted by extending and retracting the telescopic rod.

[0018] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step one, after the wiper presses the feeler gauge against the windshield, the telescopic rod is slightly extended.

[0019] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step one, after the wiper presses the feeler gauge against the windshield, the telescopic rod is extended by 1 mm.

[0020] According to at least one embodiment of this application, in the above-described method for measuring the preload of an aircraft windshield wiper, in step two, the connection position of the preload force gauge on the wiper is set at the end of the wiper.

[0021] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step three, the method for determining the time it takes for the feeler gauge to slide off between the wiper and the windshield is as follows:

[0022] While slowly pulling the wiper upwards along the windshield normal, observe the changes in the hanging force gauge. When the reading of the hanging force gauge approaches the standard pulling force, it is considered that the feeler gauge has slipped between the wiper and the windshield.

[0023] According to at least one embodiment of this application, in the above-described method for measuring the preload of aircraft windshield wipers, in step three, when the reading of the suspended force gauge reaches 99% of the standard tension, it is considered to be close to the standard tension.

[0024] This application has at least the following beneficial technical effects:

[0025] A method for measuring the preload of aircraft windshield wipers is provided. By placing a feeler gauge between the wiper and the windshield, the slippage of the feeler gauge is used as the criterion for determining when the wiper is pulled up to a set height. This transforms the judgment from purely visual measurement to observation of the feeler gauge slippage, reducing the impact of visual errors on wiper preload measurement and achieving stable and accurate measurement of wiper preload. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the aircraft windshield wiper preload measurement method provided in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of a feeler gauge provided in an embodiment of this application being suspended from the top of the windshield by a hanging line;

[0028] in:

[0029] 1-Wind wiper; 2-Windshield; 3-Feeler gauge; 4-Suspension line; 5-Suspension force gauge; 6-Telescopic rod; 7-Preload force gauge.

[0030] To better illustrate this embodiment, some content in the accompanying drawings may be omitted, enlarged, or reduced. These drawings are for illustrative purposes only and should not be construed as limiting the scope of this application. Detailed Implementation

[0031] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, and other related parts can be referred to the general design.

[0032] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The word "comprising" as used in this application description indicates that the concept preceding the word encompasses the concepts listed following the word and their equivalents, without excluding other related concepts.

[0033] Furthermore, the terms indicating location used in the description of this application are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0034] A method for measuring the preload of aircraft windshield wipers, such as Figure 1 As shown.

[0035] Step 1: Lift up wiper 1, place feeler gauge 3 between wiper 1 and windshield 2, lower wiper 1, and press feeler gauge 3 firmly onto windshield 2.

[0036] The feeler gauge 3 is suspended from the top of the windshield 2 by the suspension line 4. The suspension line 4 is equipped with a suspension force gauge 5 and a telescopic rod 6. Before placing the feeler gauge 3 between the wiper 1 and the windshield 2, the feeler gauge 3 is allowed to slide down the windshield 2 naturally, and the reading of the suspension force gauge 5 is recorded as the standard tension.

[0037] The telescopic rod 6 consists of two sections connected by a thread, and extends or retracts by rotation.

[0038] Considering convenience and affordability, as well as the pressing effect of wiper 1 on feeler gauge 3, feeler gauge 3 is placed at the connection point between the wiper arm and the wiper blade of wiper 1.

[0039] The thickness of feeler gauge 3 should not exceed 1mm, specifically 0.9mm.

[0040] Before placing the feeler gauge 3 between the wiper 1 and the windshield 2, wipe the surfaces of the wiper 1 and the windshield 2 where the feeler gauge 3 will be placed clean to ensure there is no dirt or water stains.

[0041] When the feeler gauge 3 is placed between the wiper 1 and the windshield 2, the position of the feeler gauge 3 is adjusted by extending and retracting the telescopic rod 6.

[0042] After the wiper 1 presses the feeler gauge 3 firmly onto the windshield 2, the telescopic rod 6 is extended slightly, usually by 1mm.

[0043] Step 2: Connect the windshield wiper 1 to the preload force gauge 7 and slowly pull the windshield wiper 1 upward along the normal direction of the windshield 2.

[0044] The preload force gauge 7 is connected to the wiper 1 at the connection point between the wiper arm and the wiper blade.

[0045] Step 3: When the feeler gauge 3 slides between the wiper 1 and the windshield 2, stop pulling the wiper 1 and read the reading of the preload force gauge 7 to obtain the preload force of the aircraft windshield wiper.

[0046] The time it takes for feeler gauge 3 to slide between wiper 1 and windshield 2 can be determined using the following method:

[0047] While slowly pulling the wiper 1 upwards along the normal direction of the windshield 2, observe the changes in the hanging force gauge 5. When the reading of the hanging force gauge 5 is close to the standard pulling force, it is considered that the feeler gauge 3 has slipped between the wiper 1 and the windshield 2.

[0048] When the reading of the suspended force gauge 5 reaches 99% of the standard tensile force, it is considered close to the standard tensile force.

[0049] The aircraft windshield wiper preload measurement method disclosed in the above embodiments uses a feeler gauge 3 between the wiper 1 and the windshield 2. The slippage of the feeler gauge 3 is used as the criterion for judging whether the wiper 1 is pulled up to a set height. This transforms the judgment based on pure visual size into the observation of the slippage of the feeler gauge 3, which can reduce the influence of visual error on the wiper preload measurement and achieve stable and accurate measurement of the wiper preload.

[0050] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A method for measuring the preload of aircraft windshield wipers, characterized in that, include: Step 1: Lift up the wiper (1), place a feeler gauge (3) between the wiper (1) and the windshield (2), lower the wiper (1), and press the feeler gauge (3) firmly onto the windshield (2); Step 2: Connect the windshield wiper (1) to the preload force gauge (7) and slowly pull the windshield wiper (1) upward along the normal direction of the windshield (2); Step 3: When the feeler gauge (3) slides between the wiper (1) and the windshield (2), stop pulling the wiper (1), read the reading of the preload force gauge (7), and obtain the preload force of the aircraft windshield wiper.

2. The method for measuring the preload of aircraft windshield wipers according to claim 1, characterized in that, In step one, a feeler gauge (3) is suspended from the top of the windshield (2) by a suspension line (4). A suspension force gauge (5) and a telescopic rod (6) are installed on the suspension line (4). Before placing the feeler gauge (3) between the wiper (1) and the windshield (2), the feeler gauge (3) is allowed to slide down the windshield (2) naturally. The reading of the suspension force gauge (5) is recorded as the standard tension.

3. The method for measuring the preload of aircraft windshield wipers according to claim 2, characterized in that, The telescopic rod (6) consists of two sections connected by a thread, and it extends and retracts by rotation.

4. The method for measuring the preload of aircraft windshield wipers according to claim 3, characterized in that, In step one, the feeler gauge (3) is placed at the connection point between the brush arm and the blade of the wiper (1).

5. The method for measuring the preload of aircraft windshield wipers according to claim 4, characterized in that, The thickness of the feeler gauge (3) shall not exceed 1 mm.

6. The method for measuring the preload of aircraft windshield wipers according to claim 5, characterized in that, The thickness of feeler gauge (3) is 0.9 mm.

7. The method for measuring the preload of aircraft windshield wipers according to claim 6, characterized in that, In step one, before placing the feeler gauge (3) between the wiper (1) and the windshield (2), wipe the surfaces of the wiper (1) and the windshield (2) where the feeler gauge (3) is placed clean to ensure that there are no dirt or water stains.

8. The method for measuring the preload of aircraft windshield wipers according to claim 7, characterized in that, In step one, when the feeler gauge (3) is placed between the wiper (1) and the windshield (2), the position of the feeler gauge (3) is adjusted by extending and retracting the telescopic rod (6).

9. The method for measuring the preload of aircraft windshield wipers according to claim 8, characterized in that, In step one, after the wiper (1) presses the feeler gauge (3) firmly onto the windshield (2), the telescopic rod (6) is slightly extended.

10. The method for measuring the preload of aircraft windshield wipers according to claim 9, characterized in that, In step one, after the wiper (1) presses the feeler gauge (3) onto the windshield (2), the telescopic rod (6) is extended by 1 mm.

11. The method for measuring the preload of aircraft windshield wipers according to claim 10, characterized in that, In step two, the connection position of the preload force gauge (7) on the wiper (1) is set at the connection point between the wiper arm and the wiper blade.

12. The method for measuring the preload of aircraft windshield wipers according to claim 11, characterized in that, In step three, the method for determining the time it takes for the feeler gauge (3) to slide between the wiper (1) and the windshield (2) is as follows: While slowly pulling the wiper (1) upward along the normal direction of the windshield (2), observe the change of the hanging force gauge (5). When the reading of the hanging force gauge (5) is close to the standard pulling force, it is considered that the feeler gauge (3) has slipped between the wiper (1) and the windshield (2).

13. The method for measuring the preload of aircraft windshield wipers according to claim 12, characterized in that, In step three, when the reading of the hanging force gauge (5) reaches 99% of the standard tension, it is considered close to the standard tension.

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