Platform commonly used for multi-series airplane front wheel turning test

Abstract

A universal platform for multi-series aircraft front wheel turning tests relates to the field of aircraft testing tools, a rotating disk is clamped between a pressing plate and a bottom plate, so that the rotating disk can rotate eccentrically or coaxially, and the platform can adapt to the eccentric rotation or coaxial rotation tests of undercarriages when front wheels of different types turn. The front wheel turning test platform commonly used for Boeing 737 whole series, airbus 320 whole series, ERJ, ARJ and other airplanes solves the working problem that the existing manufacturers cannot commonly use the test platform due to aircraft design, the working efficiency is improved, the cost is reduced, and the test platform is convenient to manufacture and use.

Description

TECHNICAL FIELD

[0001] The utility model relates to a platform for testing a plurality of series of airplane front wheel turning, which belongs to the field of airplane testing tools. BACKGROUND

[0002] Different airplane manufacturers have different designs for the pitch angle of airplane front landing gear struts, strut and axle rotation eccentricity, and ground contact distance of front landing gear tires. The maximum ground contact load of front landing gear tires is close to 10 tons. Each airplane manufacturer manufactures or recommends a relevant testing platform for their own airplanes. However, due to the different designs of various manufacturers, the front wheel turning of airplanes manufactured by Boeing, Airbus, BAHY, Bombardier, and COMAC is eccentric relative to the front landing gear for some models, and the front wheel turning of airplanes manufactured by Boeing, Airbus, BAHY, Bombardier, and COMAC is coaxial relative to the front landing gear for some models. However, there is currently no universal turning testing platform, and there is a high waste of equipment use and maintenance manpower and material resources in the civil aviation maintenance industry. SUMMARY

[0003] The utility model discloses a platform for testing a plurality of series of airplane front wheel turning, which belongs to the field of airplane testing tools.

[0004] The utility model discloses a platform for testing a plurality of series of airplane front wheel turning, which belongs to the field of airplane testing tools.

[0005] A platform for testing a plurality of series of airplane front wheel turning, comprising:

[0006] A bottom plate, four corners of the upper end of which are respectively provided with a pad;

[0007] A rotating disc in a disc shape, which is horizontally arranged above each pad;

[0008] The upper end of the rotating disc is coated with a non-slip coating;

[0009] A pressing plate, the center of which is provided with a circular hole, the outer diameter of the rotating disc is smaller than the outer diameter of the bottom plate and the pressing plate, the outer diameter of the rotating disc is greater than the inner diameter of the circular hole, the outer diameter of the non-slip coating is smaller than the inner diameter of the circular hole, the pressing plate is arranged at the upper end of the rotating disc, and the non-slip coating is located in the circular hole;

[0010] Four corners of the upper end of the pressing plate are respectively provided with a pressing edge guard, and a screw passes through the bottom plate, the pad, the pressing plate, and the pressing edge guard from bottom to top in sequence and is locked by a nut when the airplane front wheel is located in the circular hole, and the lower end of the airplane front wheel is in contact with the non-slip coating.

[0011] Further, it further comprises a wheel stop arranged on the front and rear sides of the airplane main wheel. Further, it further comprises a wheel stop arranged on the front and rear sides of the airplane main wheel.

[0012] In order to operate smoothly, the gasket and the bottom plate are filled with lubricating grease.

[0013] Preferably, the anti-skid coating is made of PVC base material and quartz sand arranged on the PVC base material.

[0014] In order to facilitate movement, a rotating seat is further arranged on each of the two pressing side guards arranged diagonally to each other, and the handle is rotatably arranged on the rotating seat.

[0015] In order to achieve locking, a steel ball quick release pin is further arranged, a pin hole I matched with the outer diameter of the steel ball quick release pin is arranged on the rotating disc, a pin hole II matched with the outer diameter of the steel ball quick release pin is arranged on the bottom plate, when the rotating disc is rotated to the same axis of the pin hole I and the pin hole II, the steel ball quick release pin is sequentially inserted into the pin hole I and the pin hole II, and the steel ball of the steel ball quick release pin is located at the lower end of the bottom surface of the bottom plate.

[0016] In order to improve convenience, a steel cable is further arranged, one end of the steel cable is connected to the handle, and the other end of the steel cable is fixed to the steel ball quick release pin.

[0017] The utility model discloses a beneficial effect is: the common use for Boeing 737 full series, airbus 320 full series, ERJ, ARJ etc. aircraft front wheel turns test platform solves the existing each manufacturer's work problem of unable to common test platform because of aircraft design reason, improves work efficiency and reduces cost, and it is convenient to make and use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overhead structure schematic diagram of the utility model;

[0019] Figure 2 It is the three-dimensional structure explosion drawing of the utility model;

[0020] Figure 3 It is the use state diagram of the utility model;

[0021] In the drawing, 1. aircraft front wheel 2. aircraft main wheel 3. pressing plate 4. wheel stop 5. rotating disc 6. pressing side guard 7. nut 8. anti-skid coating 9. rotating seat 10. handle 11. steel cable 12. steel ball quick release pin 13. round hole 14. bottom plate 15. screw 16. gasket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings of the utility model Figure 1 , the drawings of the utility model Figure 2 , the drawings of the utility model Figure 3 The utility model is further explained.

[0023] The utility model provides a platform for the turn test of the front wheel of a plurality of series of aircrafts, comprising a base plate 14, a rotating disc 5, a pressing plate 3 and a pressing edge guard plate 6, wherein the upper end of the base plate 14 is provided with a pad 16 at each of the four corners, the rotating disc 5 is horizontally arranged above each pad 16, the upper end of the rotating disc 5 is coated with a non-slip coating 8, the pressing plate 3 is provided with a circular hole 13 at the center, the outer diameter of the rotating disc 5 is smaller than the outer diameter of the base plate 14 and the pressing plate 3, the outer diameter of the rotating disc 5 is larger than the inner diameter of the circular hole 13, the outer diameter of the non-slip coating 8 is smaller than the inner diameter of the circular hole 13, the pressing plate 3 is arranged at the upper end of the rotating disc 5, and the non-slip coating 8 is located in the circular hole 13, the upper end of the pressing plate 3 is provided with the pressing edge guard plate 6 at each of the four corners, and the screw 15 passes through the base plate 14, the pad 16, the pressing plate 3 and the pressing edge guard plate 6 from bottom to top and is locked by the nut 7, when the front wheel 1 of the aircraft is located in the circular hole 13, the lower end of the front wheel 1 is in contact with the non-slip coating 8. When the turn test of the front wheel of the aircraft is needed, the aircraft is towed to the non-slip coating 8 by a towing vehicle, and the static friction between the tire of the front wheel 1 of the aircraft and the non-slip coating 8 makes the rotating disc 5 rotate under the support of the pad 16, since the rotating disc 5 is clamped between the pressing plate 3 and the base plate 14, the rotating disc 5 can rotate eccentrically or coaxially, so that the test of the eccentric rotation or the coaxial rotation of the landing gear during the turn of the front wheel of different aircrafts can be adapted. The test platform can be used for the turn test of the front wheel of the Airbus A320 series and the Bao Hang Gongye E series shock column with a pitch angle, and can also be used for the turn test of the Boeing 737 series turn column and the wheel shaft turn, and can also meet the requirements of the aircraft maintenance manual AMM of the related manufacturers. The structure is simple and convenient to use, the maintenance enterprise can save the cost by avoiding excessive equipment investment, the maintenance frequency of the equipment is reduced, and the work efficiency is improved.

[0024] In an embodiment of the utility model, the wheel stoppers 4 are arranged on the front and rear sides of the main wheel 2 of the aircraft respectively. The wheel stoppers 4 can limit the main wheel 2 of the aircraft, prevent the aircraft from moving, and further improve the reliability of the test work.

[0025] In an embodiment of the utility model, the pad 16 and the base plate 14 are filled with lubricating grease. The lubricating grease filled between the pad 16 and the base plate 14 can make the rotating disc 5 rotate more smoothly, prevent the rotating disc 5 from being worn by the base plate 14, and further improve the service life.

[0026] In an embodiment of the utility model, the non-slip coating 8 is made of a PVC base material and quartz sand arranged on the PVC base material. The base plate 14 and the rotating disc 5 can be made of stainless steel, the pressing edge guard plate 6 and the pad 16 are made of aluminum alloy, and the pressing plate 3 is made of glass fiber.

[0027] In one embodiment of the utility model, still include respectively install in two edge guards 6 that mutually diagonal setting on swivel base 9, handle 10 rotation is installed on swivel base 9.When needing to move whole platform, through rotating handle 10 to vertical state, staff can hold handle and move platform conveniently, improve the convenience of using.

[0028] In one embodiment of the utility model, still include steel ball quick release pin 12, rotation disc 5 is provided with the pin hole I that matches with the outer diameter of steel ball quick release pin 12, bottom plate 14 is provided with the pin hole II that matches with the outer diameter of steel ball quick release pin 12, when rotation disc 5 rotates to the same shaft of pin hole I and pin hole II, steel ball quick release pin 12 is inserted into pin hole I and pin hole II in turn, and the steel ball of steel ball quick release pin 12 is located at the lower end of the bottom surface of bottom plate 14.When platform moves, through inserting steel ball quick release pin 12, the locking of rotation disc 5 relative to bottom plate 14 is realized, so that rotation disc 5 can be prevented from rotating when platform moves, to improve reliability.When needing to release locking, steel ball quick release pin 12 is pulled out with force upwards, and the steel ball of steel ball quick release pin 12 is retracted inward, so that steel ball quick release pin 12 can be extracted from rotation disc 5 and bottom plate 14, and locking operation is convenient and fast.In the embodiment, preferably, still include cable 11, one end of cable 11 is connected to handle 10, and the other end is fixed to steel ball quick release pin 12.Through connecting steel ball quick release pin 12 and handle 10 together by cable 11, steel ball quick release pin 12 can be prevented from losing in non-use state, to further improve the reliability of use.

[0029] Finally, it should be noted that: the above only for preferred embodiment of the utility model has been described, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiment, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A platform for multi-series aircraft nose wheel cornering testing, characterized in that, The utility model relates to a kind of aircraft front wheel protection device, including: Bottom plate (14), which is provided with a pad (16) at each of the four corners of its upper end; Rotary disc (5), which is in the shape of a disc, is horizontally arranged above each pad (16); The upper end of rotary disc (5) is coated with a non-slip coating (8); Pressing plate (3), which is provided with a circular hole (13) at its center, the outer diameter of rotary disc (5) is smaller than that of bottom plate (14) and pressing plate (3), the outer diameter of rotary disc (5) is larger than that of circular hole (13), the outer diameter of non-slip coating (8) is smaller than that of circular hole (13), pressing plate (3) is arranged at the upper end of rotary disc (5), and non-slip coating (8) is located in circular hole (13); Pressing plate (3) is provided with a pressing edge guard (6) at each of the four corners of its upper end, and a screw (15) passes through bottom plate (14), pad (16), pressing plate (3) and pressing edge guard (6) from bottom to top in turn and is locked by a nut (7), when the aircraft front wheel (1) is located in circular hole (13), its lower end is in contact with non-slip coating (8).

2. The platform for universal use in corner tests of aircraft nose wheels of various series according to claim 1, characterized in that: It also includes a wheel stop (4) arranged on the front and rear sides of the aircraft main wheel (2) respectively.

3. The platform for universal use in corner tests of aircraft nose wheels of various series according to claim 1, characterized in that: The pad (16) and the bottom plate (14) are filled with lubricating grease.

4. The platform for universal use in corner tests of aircraft nose wheels of various series according to claim 1, characterized in that: The non-slip coating (8) is made of PVC substrate and quartz sand arranged on the PVC substrate.

5. The platform for universal use in corner tests of aircraft nose wheels of various series according to claim 1, characterized in that: It also includes a rotating seat (9) installed on two pressing edge guards (6) arranged diagonally to each other, and a handle (10) is rotatably installed on the rotating seat (9).

6. The platform for universal use in corner tests of aircraft nose wheels of various series according to claim 5, characterized in that: It also includes a steel ball quick release pin (12), the rotary disc (5) is provided with a pin hole I matching the outer diameter of the steel ball quick release pin (12), and the bottom plate (14) is provided with a pin hole II matching the outer diameter of the steel ball quick release pin (12), when the rotary disc (5) is rotated to the same axis of the pin hole I and the pin hole II, the steel ball quick release pin (12) is inserted into the pin hole I and the pin hole II in turn, and the steel ball of the steel ball quick release pin (12) is located at the lower end of the bottom surface of the bottom plate (14).

7. The platform for universal use in corner tests of aircraft nose wheels of various series according to claim 6, characterized in that: It also includes a steel cable (11), one end of which is connected to the handle (10), and the other end is fixed to the steel ball quick release pin (12).

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