A pressure rolling durability testing device for cargo transfer guide rollers in floor boxes of cargo aircraft

Abstract

A pressure rolling durability test device for a cargo plane floor box cargo transfer guide roller comprises a pressure loading lever arm, a specimen mounting seat, a base, a weight bag, a loading roller and a motor. The specimen mounting seat is provided with an aircraft ground rail. The pressure loading lever arm is arranged on the specimen mounting seat in a lever structure. The rear end of the pressure loading lever arm is rotatably connected with the specimen mounting seat to form a fulcrum of the lever structure. The front end of the pressure loading lever arm is cantilevered and extends to the outside of the base. The weight bag is hung on the front end of the pressure loading lever arm to form a power point of the lever structure. The loading roller is horizontally arranged in the middle section of the force loading lever arm and is perpendicular to the pressure loading lever arm. The loading roller is used to be pressed on the cargo plane floor box cargo transfer guide roller to form a resistance point of the lever structure. The motor is arranged on the pressure loading lever arm and is transmission-connected with the loading roller to drive the loading roller to rotate. The invention has simple structure, good corrosion resistance, long service life, convenient replacement, and high surface friction coefficient of the loading roller.

Description

Technical Field

[0001] The invention relates to the field of fatigue testing devices, and in particular to a pressure rolling durability testing device for a cargo transfer guide roller in a floor box of a cargo aircraft. Background Art

[0002] When loading and unloading cargo containers at the airport, since the fuselage door is fixed and the aircraft cargo hold is a barreled closed space, the air container needs to be docked to the aircraft door by an external elevator and then pushed in, and then it needs to be pushed into the designated position in the cargo hold along the fuselage direction. However, since the weight of air containers is often measured in tons, the transfer in the container cabin requires the bottom plate to provide a support and drag reduction function. In addition, the mainstream design of the existing cargo aircraft floor generally presets several rows of bottom plate connection and installation rails, so the equipment is required to meet the aviation airworthiness safety requirements in addition to the strength. It also needs to correspond to the interface structure of the aircraft floor rail, and the guide roller design includes a high-strength ultra-light guide roller bracket and a matching roller device. From the perspective of the use environment and working conditions of the existing technology, the roller needs to withstand the rolling of the overweight gravity load, and its durability and strength need to be accurately estimated and tested before design. Therefore, there is an urgent need for a practical testing tool that can easily verify the pressure rolling durability fatigue capacity of the cargo transfer guide roller on the cargo aircraft floor. Summary of the invention

[0003] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a pressure rolling durability testing device for the cargo transfer guide roller of the cargo aircraft floor box, in which a motor drives a loading roller through a synchronous transmission belt, which has a simple structure, good corrosion resistance, long service life, is easy and convenient to replace, has a high friction coefficient on the surface of the loading roller, and avoids slipping.

[0004] To achieve the above-mentioned purpose, the present invention provides a pressure rolling durability test device for a cargo aircraft floor box cargo transfer guide roller, comprising a pressure loading lever arm, a specimen mounting seat, a base, a counterweight bag, a loading roller and a motor, wherein the specimen mounting seat is fixed on the base, and an aircraft ground rail for placing the cargo aircraft floor box cargo transfer guide roller is provided on the specimen mounting seat, the pressure loading lever arm is arranged on the specimen mounting seat in a lever structure, the rear end of the pressure loading lever arm is rotatably connected to the specimen mounting seat to form a fulcrum of the lever structure, the front end of the pressure loading lever arm is cantilevered and extends to the outside of the base, the counterweight bag is hung on the front end of the pressure loading lever arm to form a power point of the lever structure, the loading roller is horizontally arranged in the middle section of the pressure loading lever arm and is perpendicular to the pressure loading lever arm, the loading roller is used to be pressed on the cargo aircraft floor box cargo transfer guide roller to form a resistance point of the lever structure, and the motor is arranged on the pressure loading lever arm and is transmission-connected to the loading roller to drive the loading roller to rotate.

[0005] As a further preferred technical solution of the present invention, the pressure-loading lever arm includes two triangular side plates arranged in a clamping structure, and the two triangular side plates are fixedly connected by at least three support shafts, and the at least three support shafts are respectively located at the front end, rear end and middle part of the pressure-loading lever arm; the rear end of the pressure-loading lever arm is rotatably connected to the specimen mounting seat through the support shaft at the rear end, and the front end of the pressure-loading lever arm is connected to the counterweight bag through the support shaft at the front end.

[0006] As a further preferred technical solution of the present invention, the specimen mounting seat includes a bottom plate and two vertical plates, the bottom plate is horizontally fixed on the base, the two vertical plates are arranged on the bottom plate in a clamping structure, the pressure loading lever arm is located between the two vertical plates, and an installation groove is provided on the bottom plate between the two vertical plates, and the aircraft ground rail is embedded in the installation groove.

[0007] As a further preferred technical solution of the present invention, rotating bushings are symmetrically provided on the two vertical plates, and the two end shaft heads of the supporting shaft at the rear end of the pressure loading lever arm respectively pass through the corresponding triangular side plates and are inserted into the corresponding rotating bushings.

[0008] As a further preferred technical solution of the present invention, the shaft heads at both ends of the loading roller are respectively inserted into corresponding preset holes on the two triangular side plates, and the shaft of the loading roller is isolated and lubricated from the triangular side plates by engineering plastic bushings.

[0009] As a further preferred technical solution of the present invention, the motor is arranged between the two triangular side plates, the end face of the shaft end of the motor is fixedly connected to the triangular side plate on one side, a synchronous wheel is respectively provided on the rotating shaft and the loading roller of the motor, and the two synchronous wheels are connected to the same synchronous transmission belt to realize transmission connection.

[0010] As a further preferred technical solution of the present invention, a motor guard plate is provided between the two triangular side plates around the motor installation position, and both ends of the motor guard plate are respectively fixedly connected to the corresponding triangular side plates.

[0011] The cargo transfer guide roller pressure rolling durability testing device for cargo aircraft floor boxes of the present invention has the following beneficial effects by adopting the above technical scheme:

[0012] 1) The lever structure of the present invention cooperates with the heavy pressure structure, and the installation environment of the cargo transfer guide roller of the cargo aircraft floor box reproduces the tooling adaptation design, which is convenient to install, reasonable in structure, and has strong bearing capacity;

[0013] 2) The structure of the present invention is simple, and different weights of counterweight bags can be selected according to the needs to match the working conditions of the loading roller under different pressure loads, so as to meet the pressure durability test function requirements of different container transports at different positions in the cabin;

[0014] 3) The motor of the present invention drives the loading roller through a synchronous transmission belt, which has a simple structure, good corrosion resistance, long service life, and is easy and convenient to replace. The friction coefficient of the loading roller surface is high and slipping is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 A schematic diagram of the structure from one perspective of a cargo aircraft floor box cargo transfer guide roller pressure rolling durability test device;

[0017] Figure 2 A structural schematic diagram of another perspective for the pressure rolling durability test device for cargo transfer guide rollers in floor boxes of cargo aircraft;

[0018] Figure 3 This is an exploded schematic diagram of a cargo aircraft floor box cargo transfer guide roller pressure rolling durability test device;

[0019] Figure 4 It is a partial cross-sectional view of a pressure rolling durability test device for cargo transfer guide rollers in floor boxes of cargo aircraft;

[0020] Figure 5 for Figure 4 AA section view in.

[0021] Figure 1-Figure 5 Middle: 1. Pressure loading lever arm, 1-1. Triangular side plate, 1-2. Motor guard plate, 1-3. Motor, 1-4. Synchronous wheel, 1-5. Synchronous transmission belt, 1-6. Loading roller, 1-7. Split pin, 1-8. Support shaft, 1-9. M6 countersunk screw, 1-10. M12 nut, 1-11. Engineering plastic bushing, 1-12. Gasket, 2. Specimen mounting seat, 2-1. Aircraft ground rail, 2-2. M8 bolt, 2-3. Rotating bushing, 2-4. Vertical plate, 2-5. Bottom plate, 3. Cargo aircraft floor box cargo transfer guide roller, 4. Base, 5. Counterweight bag.

[0022] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the preferred embodiments are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0024] like Figures 1 to 5 As shown, the present invention provides a pressure rolling durability test device for a cargo aircraft floor box cargo transfer guide roller, the device comprises a pressure loading lever arm 1, a specimen mounting seat 2, a base 4, a weight bag 5, a loading roller 1-6 and a motor 1-3, the specimen mounting seat 2 is fixed on the base 4, an aircraft ground rail 2-1 is provided on the specimen mounting seat 2, a cargo aircraft floor box cargo transfer guide roller 3 for placing a specimen on the aircraft ground rail 2-1, the pressure loading lever arm 1 is arranged on the specimen mounting seat 2 in a lever structure, the rear end of the pressure loading lever arm 1 rotates with the specimen mounting seat 2 The pressure-loading lever arm 1 is dynamically connected to form a fulcrum of the lever structure. The front end of the pressure-loading lever arm 1 extends to the outside of the base 4 in a cantilevered shape. The weight bag 5 is hung on the front end of the pressure-loading lever arm 1 to form a power point of the lever structure. The loading roller 1-6 is horizontally arranged in the middle section of the pressure-loading lever arm 1 and is perpendicular to the pressure-loading lever arm 1. The loading roller 1-6 is used to be crimped on the cargo transfer guide roller 3 of the cargo aircraft floor box to form a resistance point of the lever structure. The motor 1-3 is arranged on the pressure-loading lever arm 1 and is transmission-connected to the loading roller 1-6 to drive the loading roller 1-6 to rotate.

[0025] Further reading Figures 1 to 5 The pressure-loading lever arm 1 includes two triangular side plates 1-1 arranged in a clamping structure, and the two triangular side plates 1-1 are fixedly connected by at least three support shafts 1-8, and the at least three support shafts 1-8 are respectively located at the front end, rear end and middle part of the pressure-loading lever arm 1; the rear end of the pressure-loading lever arm 1 is rotatably connected to the specimen mounting seat 2 through the support shaft 1-8 at the rear end, and the front end of the pressure-loading lever arm 1 is connected to the counterweight bag 5 through the support shaft 1-8 at the front end. Among them, the two end shaft heads of the support shaft 1-8 at the rear end pass through the corresponding triangular side plates 1-1 and the vertical plates 2-4, and then are covered with gaskets 1-12 and locked and fixed by M12 nuts 1-10, and the two end shaft heads of the support shaft 1-8 at the front end pass through the corresponding triangular side plates 1-1, and then are covered with gaskets 1-12 and locked and fixed by M12 nuts 1-10, and the two end shaft heads of the support shaft 1-8 at the middle part pass through the corresponding triangular side plates 1-1 and then are locked by cotter pins 1-7.

[0026] In a specific implementation, the specimen mounting base 2 includes a bottom plate 2-5 and two vertical plates 2-4. The bottom plate 2-5 is horizontally fixed to the base 4 by six M8 bolts 2-2. The two vertical plates 2-4 are arranged on the bottom plate 2-5 in a clamping structure. The pressure loading lever arm 1 is located between the two vertical plates 2-4. A mounting groove is provided on the bottom plate 2-5 between the two vertical plates 2-4, and the aircraft ground rail 2-1 is embedded in the mounting groove.

[0027] Preferably, rotating bushings 2-3 are symmetrically provided on the two vertical plates 2-4, and the two end shaft heads of the supporting shaft 1-8 at the rear end of the pressure-loading lever arm 1 respectively pass through the corresponding triangular side plates 1-1 and are inserted into the corresponding rotating bushings 2-3.

[0028] Further preferably, the shaft heads at both ends of the loading roller 1-6 are respectively inserted into corresponding preset holes on the two triangular side plates 1-1, and the shaft of the loading roller 1-6 and the triangular side plates 1-1 are isolated and lubricated by engineering plastic bushings 1-11.

[0029] In a specific implementation, the motor 1-3 is arranged between the two triangular side plates 1-1, and the end face of the shaft end of the motor 1-3 is fixedly connected to the triangular side plate 1-1 on one side by an M6 countersunk screw 1-9. A synchronous wheel 1-4 is respectively provided on the rotating shaft of the motor 1-3 and the loading roller 1-6, and the two synchronous wheels 1-4 are sleeved on the same synchronous transmission belt 1-5 to realize transmission connection.

[0030] Preferably, a motor guard plate 1-2 is provided between the two triangular side panels 1-1 around the mounting position of the motor 1-3. There are two motor guard plates 1-2, which are respectively located above and below the motor 1-3. Each motor guard plate 1-2 is fastened and installed by three M6 countersunk screws 1-9 on the left and right passing through the corresponding triangular side panels 1-1.

[0031] The working principle of the cargo aircraft floor box cargo transfer guide roller pressure rolling durability test device is as follows:

[0032] After lifting the pressure-loading lever arm 1, install the aircraft ground rail 2-1, and install the cargo aircraft floor box cargo transfer guide roller 3 on the specimen mounting seat 2; lower the pressure-loading lever arm 1, so that the loading roller 1-6 is pressed against the cargo aircraft floor box cargo transfer guide roller 3, and hang a counterweight bag 5 of appropriate weight on the front end of the pressure-loading lever arm 1, start the motor 1-3 until the required number of revolutions is completed, stop the machine and remove the cargo aircraft floor box cargo transfer guide roller 3, observe and detect the status of the cargo aircraft floor box cargo transfer guide roller 3, and end the test.

[0033] The present invention is based on the design and development of a cargo transfer guide roller 3 product for a cargo aircraft floor box, and is designed for testing the pressure rolling durability test of the roller structure of the product. By adopting the above-mentioned technical scheme, the device of this embodiment can achieve the adjustment requirements of different pressure loads and different rotation speeds. The test is automatically driven by motor 1-3, and the motor 1-3 has a constant rotation speed. The actual rotation speed of the tested product roller (load-bearing roller 1-6) is determined by multiplying the test time by the rotation speed. The roller state after long-term operation is then observed and analyzed, and the roller load-bearing durability capacity is evaluated, thereby verifying the load-bearing durability fatigue capacity of the load-bearing rollers 1-6.

[0034] The application of the pressure rolling durability test device for cargo transfer guide rollers in the floor box of a cargo aircraft in this embodiment greatly improves the timeliness of sample verification. Through the compressed verification cycle, designers can select load rollers 1-6 with different base materials and different engineering plastic bushings 1-11, which not only avoids time waste and improves design efficiency, but also improves product performance and quality. In addition, the final verification shows that the high-strength wear-resistant engineering plastic bushing 1-11 has the best wear life, and the disassembly and installation are more convenient and reliable, with the lowest maintenance cost, which improves maintenance efficiency, and changes the metal surface friction to metal-plastic friction, which improves the corrosion resistance of the friction material.

[0035] Although specific embodiments of the present invention are described above, those skilled in the art should understand that these are merely examples and that various changes or modifications may be made to the embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A pressure rolling durability testing device for cargo transfer guide rollers in floor boxes of cargo aircraft, characterized in that: It includes a pressure-loading lever arm, a specimen mounting seat, a base, a counterweight bag, a loading roller and a motor, wherein the specimen mounting seat is fixed on the base, and the specimen mounting seat is provided with an aircraft ground rail for placing a cargo transfer guide roller for a cargo aircraft floor box. The pressure-loading lever arm is arranged on the specimen mounting seat in a lever structure, and the rear end of the pressure-loading lever arm is rotatably connected to the specimen mounting seat to form a fulcrum of the lever structure, and the front end of the pressure-loading lever arm extends to the outside of the base in a cantilever shape, and the counterweight bag is hung on the front end of the pressure-loading lever arm to form a power point of the lever structure. The loading roller is horizontally arranged in the middle section of the pressure-loading lever arm and is perpendicular to the pressure-loading lever arm. The loading roller is used to be pressed on the cargo transfer guide roller of the cargo aircraft floor box to form a resistance point of the lever structure, and the motor is arranged on the pressure-loading lever arm and is transmission-connected to the loading roller to drive the loading roller to rotate; wherein, The pressure-loading lever arm comprises two triangular side plates arranged in a clamping structure, the two triangular side plates are fixedly connected by at least three support shafts, and the at least three support shafts are respectively located at the front end, the rear end and the middle part of the pressure-loading lever arm; the rear end of the pressure-loading lever arm is rotatably connected to the specimen mounting seat through the support shaft at the rear end, and the front end of the pressure-loading lever arm is connected to the counterweight bag through the support shaft at the front end; The shaft heads at both ends of the loading roller are respectively inserted into corresponding preset holes on the two triangular side plates, and the shaft of the loading roller and the triangular side plates are isolated and lubricated by engineering plastic bushings; The motor is arranged between the two triangular side plates, the end face of the shaft end of the motor is fixedly connected to the triangular side plate on one side, a synchronous wheel is respectively provided on the rotating shaft and the loading roller of the motor, and the two synchronous wheels are connected to the same synchronous transmission belt to realize transmission connection.

2. The pressure rolling durability testing device for cargo transfer guide rollers in floor boxes of cargo aircraft according to claim 1 is characterized in that: The specimen mounting seat includes a bottom plate and two vertical plates, the bottom plate is horizontally fixed on the base, the two vertical plates are arranged on the bottom plate in a clamping structure, the pressure loading lever arm is located between the two vertical plates, and a mounting groove is provided on the bottom plate between the two vertical plates, and the aircraft ground rail is embedded in the mounting groove.

3. The pressure rolling durability testing device for cargo transfer guide rollers in floor boxes of cargo aircraft according to claim 2 is characterized in that: Rotating bushings are symmetrically arranged on the two vertical plates, and the shaft heads at both ends of the supporting shaft at the rear end of the pressure loading lever arm respectively pass through the corresponding triangular side plates and are inserted into the corresponding rotating bushings.

4. The pressure rolling durability testing device for cargo transfer guide rollers in floor boxes of cargo aircraft according to claim 3 is characterized in that: A motor guard plate is provided between the two triangular side plates around the installation position of the motor, and two ends of the motor guard plate are respectively fixedly connected to the corresponding triangular side plates.

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