Aircraft front wheel turning test disc

Abstract

The utility model discloses an airplane front wheel turning test disc, which belongs to the technical field of aviation maintenance equipment and comprises a base, a lifting plate and a turntable, a positioning groove is arranged on the base, a plurality of positioning holes are arranged on the side wall of the positioning groove, a lifting piece is arranged in the positioning groove, and a first elastic piece and a positioning ball are arranged in the lifting piece. The upper end of the lifting part is connected with the lifting plate, the rotating disc is installed on the lifting plate and can rotate, the base, the lifting plate and the rotating disc are each provided with a U-shaped opening used for being matched with a jack for use, after the jack jacks up an undercarriage, the device is pushed to the position below a front wheel, and then the undercarriage is pushed to the position below the front wheel. The jack is located at the U-shaped opening, then the jack is detached, the front wheel of the airplane is placed on the turntable, the front wheel of the airplane is controlled to rotate in a cockpit for turning test, and other machinery equipment is not needed to drag the front wheel of the airplane.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation maintenance equipment, in particular to an aircraft front wheel turning test disc. Background Art

[0002] When the aircraft's front wheel turning system is being fault tested or the turning mechanism is being lubricated, the aircraft's front landing gear needs to be placed on a turning test device to reduce ground friction damage to the wheels and the impact on the turning effect.

[0003] At present, most of the mainstream domestic aircraft models such as A320, B737, E190, etc., except for some models that have special turning test discs, are equivalent alternative solutions, such as the simple solution of applying grease between two iron plates. However, regardless of special test tools or equivalent solutions, the aircraft needs to be towed to the test device by a tractor. In actual operation, this solution is affected by the airport tractor support capacity. The tractor needs to communicate and wait with multiple parties, and the tractor support fee must also be paid separately by the airline. At the same time, since the auxiliary power unit needs to be started during the towing process, considerable additional fuel consumption costs are incurred. Among them, the iron plate is likely to slide out from under the wheel during the rotation of this equivalent solution. Therefore, the use of the above-mentioned existing devices has greatly increased the maintenance cost and reduced the maintenance efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide an aircraft front wheel turning test plate, which can be used in conjunction with a jack and does not require the use of other machinery and equipment to drag the aircraft front wheel, thereby reducing maintenance costs.

[0005] To achieve the above-mentioned purpose, the utility model proposes an aircraft front wheel turning test disc, including a base, a lifting plate and a turntable, the base is provided with a positioning groove, the side wall of the positioning groove is provided with a plurality of positioning holes, the positioning groove is provided with a lifting member, the lifting member is provided with a first elastic member and a positioning ball, the positioning ball abuts against the first elastic member and is stuck in one of the positioning holes, the upper end of the lifting member is connected to the lifting plate, the turntable is installed on the lifting plate and can rotate, the base, the lifting plate and the turntable are all provided with a U-shaped opening, the U-shaped opening extends to the rotation center of the turntable 30 for use with a jack.

[0006] Optionally, the lifting member is provided with a receiving channel, and the first elastic member and the positioning ball are both installed in the receiving channel.

[0007] Optionally, a depression is provided on the lifting plate, and the turntable is installed in the depression.

[0008] Optionally, a long strip is provided in the depression, a plurality of rolling elements are provided on the long strip, and the rolling elements abut against the turntable.

[0009] Optionally, a fixing frame is provided on the turntable.

[0010] Optionally, a moving wheel is provided on the base, and a second elastic member is sleeved on the moving wheel.

[0011] Optionally, a baffle is provided on the turntable, and the baffle is installed at the U-shaped opening of the turntable.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The aircraft front wheel turning test disc of the utility model technical solution is provided with a base, a lifting plate and a turntable, the base is provided with a positioning groove, the side wall of the positioning groove is provided with a plurality of positioning holes, the positioning groove is provided with a lifting member, the lifting member is provided with a first elastic member and a positioning ball, the positioning ball abuts against the first elastic member and is stuck in one of the positioning holes, the upper end of the lifting member is connected with the lifting plate, the turntable is installed on the lifting plate and can rotate, the base, the lifting plate and the turntable are all provided with a U-shaped opening for use with a jack, after the landing gear is lifted by the jack, the device is pushed under the front wheel so that the jack is located at the U-shaped opening, and then the jack is removed, so that the front wheel of the aircraft is placed on the turntable, and the front wheel of the aircraft is controlled to rotate in the cockpit to perform a turning test, without the need to use other machinery and equipment to drag the front wheel of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of an aircraft front wheel turning test plate of the utility model;

[0016] Figure 2 This is an exploded view of an embodiment of the aircraft front wheel turning test plate of the utility model;

[0017] Figure 3 It is a partial cross-sectional view of an embodiment of the aircraft front wheel turning test plate of the utility model;

[0018] Figure 4 for Figure 3 A magnified detail of the center A;

[0019] Figure 5 It is a structural schematic diagram of a lifting plate installed on a base.

[0020] Description of Figure Numbers:

[0021]

[0022] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] The utility model provides an aircraft front wheel turning test disc 100.

[0027] See also Figure 1-5In one embodiment of the utility model, the aircraft front wheel turning test disc 100 includes a base 10, a lifting plate 20 and a turntable 30. The base 10 is provided with a positioning groove 12, and the side wall of the positioning groove 12 is provided with a plurality of positioning holes 13. A lifting member 40 is provided in the positioning groove 12, and a first elastic member 60 and a positioning ball 61 are provided in the lifting member 40. The positioning ball 61 abuts against the first elastic member 60 and is stuck in one of the positioning holes 13. The upper end of the lifting member 40 is connected to the lifting plate 20, and the turntable 30 is installed on the lifting plate 20 and can rotate.

[0028] In this embodiment, a U-shaped opening 11 is provided on the base 10, the lifting plate 20 and the turntable 30. The U-shaped opening 11 extends to the rotation center of the turntable 30 and is used to cooperate with the jack for operation. First, the landing gear of the aircraft is lifted up with the jack, and then the device is pushed under the front wheel of the aircraft so that the jack is located at the U-shaped opening 11. Then, the jack is removed and the front wheel of the aircraft is placed on the turntable 30, so as to facilitate the turning test of the front wheel of the aircraft.

[0029] The lifting member 40 is provided with an accommodating channel 41, and the first elastic member 60 and the positioning ball 61 are both installed in the accommodating channel, wherein the first elastic member 60 can be a spring, and the positioning ball 61 can be a spherical ball made of stainless steel; the two side walls of the positioning groove 12 are provided with the positioning holes 13, the positioning holes 13 on both sides are symmetrically arranged, and the positioning holes 13 are arranged in sequence along the vertical direction. It can be understood that under the elastic force of the first elastic member 60, the positioning ball 61 opens toward both sides and is stuck in one of the positioning holes 13, playing a positioning role. When the positioning ball 61 is stuck in the positioning holes 13 at different longitudinal height positions, the distance between the lifting plate 20 and the base 10 is different, and the front wheel of the aircraft can be pre-positioned by adjusting the height position of the lifting plate 20, so that the front wheel of the aircraft can fall accurately on the fixed position of the turntable 30 more accurately. When the front wheel of the aircraft is pressed down, the lifting member 40 is completely retracted into the positioning groove 12, and the lifting plate 20 is fitted with the base 10.

[0030] In one embodiment of the utility model, a depression 21 is provided on the lifting plate 20, and the turntable 30 is installed in the depression 21. A long strip 23 is provided in the depression 21, and a plurality of rolling members 24 are provided on the long strip 23. The rolling members 24 abut against the bottom of the turntable 30 to support it.

[0031] In this embodiment, the number of the strips 23 is three, the distance between each strip 23 is equal, and each strip 23 is provided with a rolling member 24, the rolling member 24 can be a non-standard plane ball bearing, the turntable 30 can be a round disc made of stainless steel 304, but is not limited to it, the rolling member 24 supports the turntable 30, reduces the friction of the turntable 30 during rotation, and improves the smoothness of rotation of the turntable 30.

[0032] In one embodiment of the utility model, a fixing frame 31 and a baffle 32 are provided on the turntable 30, and the baffle 32 is installed at the U-shaped opening of the turntable 30, and the fixing frame 31 can better position the front wheel of the aircraft; a moving wheel 50 is provided on the base 10 to facilitate the movement of the position of the entire device, and a second elastic member 51 is sleeved on the moving wheel 50, and the moving wheel 50 can perform telescopic movement on the base 10.

[0033] In this embodiment, limit platforms 24 are respectively provided on both sides of the base 10, and the limit platforms 24 are flush with the upper surface of the base 10, and the moving wheels 50 are installed on the limit platforms 24; an arc-shaped notch is provided above the fixing frame 31, which adapts to the curvature of the front wheel of the aircraft and can better position the front wheel of the aircraft. The second elastic member 51 can also be a spring. Under normal conditions, under the elastic force of the second elastic member 51, the moving wheel 50 is exposed under the base 10, and the device can be moved smoothly. When the front wheel of the aircraft is pressed on the turntable 30, under the neutral action, the moving wheel 50 squeezes the second elastic member 51 and shrinks upward, so that the bottom of the base 10 can be against the ground, preventing the moving wheel 50 from being damaged under pressure.

[0034] Working principle: first use the jack to lift the landing gear, then push the device under the front wheel so that the jack is located at the U-shaped opening 11, and then remove the jack to place the front wheel of the aircraft on the fixed frame 31 on the turntable 30. The lifting plate 20 moves down under the gravity of the front wheel of the aircraft and is close to the base 10. At the same time, the moving wheel 50 shrinks upward so that the bottom of the base 10 is against the ground. At this time, the front wheel can be controlled to rotate on the turntable 30 in the aircraft control room to reduce the friction between the aircraft and the ground, and the front wheel of the aircraft can be tested for turning without using other machinery and equipment to drag the front wheel of the aircraft.

[0035] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An aircraft front wheel turning test disc, characterized in that: It includes a base, a lifting plate and a turntable, the base is provided with a positioning groove, the side wall of the positioning groove is provided with a plurality of positioning holes, the positioning groove is provided with a lifting member, the lifting member is provided with a first elastic member and a positioning ball, the positioning ball abuts against the first elastic member and is stuck in one of the positioning holes, the upper end of the lifting member is connected with the lifting plate, the turntable is installed on the lifting plate and can rotate, the base, the lifting plate and the turntable are all provided with a U-shaped opening, the U-shaped opening extends to the rotation center of the turntable, and is used to cooperate with a jack.

2. The aircraft front wheel turning test disc as claimed in claim 1, characterized in that: The lifting member is provided with an accommodating channel, and the first elastic member and the positioning ball are both installed in the accommodating channel.

3. The aircraft front wheel turning test disc as claimed in claim 1, characterized in that: The lifting plate is provided with a recess, and the turntable is mounted in the recess.

4. The aircraft front wheel turning test disc as claimed in claim 3, characterized in that: A long strip is arranged in the depression, and a plurality of rolling elements are arranged on the long strip, and the rolling elements abut against the rotating disk.

5. The aircraft front wheel turning test disc as claimed in claim 1, characterized in that: A fixing frame is arranged on the rotating disk.

6. The aircraft front wheel turning test disc as claimed in claim 5, characterized in that: The base is provided with a moving wheel, and the moving wheel is sleeved with a second elastic member.

7. The aircraft front wheel turning test disc as claimed in claim 1, characterized in that: The turntable is provided with a baffle, which is installed at the U-shaped opening of the turntable.

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