Draw bar hanging ladder for skill training

Abstract

The utility model relates to a draw bar hanging ladder for skill training. The draw bar hanging ladder comprises a bracket, a traction mounting joint, a connecting piece, a step ladder and wheels, the support comprises a supporting bottom frame and supporting side frames connected to the two sides of the supporting bottom frame. One side of the support side frame is provided with a step ladder, and the other side is provided with a draw bar mounting joint; the other end of the traction rod is connected with the traction mounting joint through a connecting piece; wheels are installed on the sides, away from the ground, of the supporting transverse rods Compared with the prior art, the working ladder for training aircraft maintenance personnel and the draw bar mounting joint are manufactured in one device, so that the working ladder can replace an aircraft tractor to realize the training of draw bar connection operation, and can also be used as the working ladder; the traction installation connector comprises a plurality of traction installation pieces, can adjust the installation height of the traction rod, guarantees that the two connected ends of the traction rod are on the same horizontal plane, prevents component force perpendicular to the direction of the traction rod from being generated, and is wide in application range.

Description

Technical Field

[0001] The utility model relates to civil aviation skill training equipment, in particular to a traction rod hanging ladder used for skill training. Background Art

[0002] Currently, aircraft towing and aircraft transfer drills are part of the training program, making practical aircraft towing training a mandatory skill for every civil aircraft maintenance personnel. One end of the aircraft towbar is connected to the aircraft, and the other end is typically attached to the front of the towing vehicle. A worm gear on the towbar is then used to mechanically retract the rollers, aligning the two ends (aircraft and towing vehicle) to a roughly level height, facilitating subsequent towing of the aircraft.

[0003] Since training facilities typically don't have a tow truck as training equipment, without one, the tow bar can only be connected to the aircraft's nose landing gear. Since the other end can't be placed on the tow truck, it's impossible to replicate the complete tow bar operation steps in a real maintenance environment. Consequently, maintenance personnel may not be able to correctly understand and master the tow bar operation steps, resulting in poor training results.

[0004] Therefore, how to design a traction rod hanging ladder for skill training that is convenient for restoring the maintenance environment is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a traction rod hanging ladder for skill training in order to overcome the defect of the above-mentioned prior art that the maintenance environment cannot be restored, resulting in poor training effect.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a traction rod hanging ladder for skill training is provided, which is connected to the traction rod and includes a bracket, a traction mounting joint, a connector, a step ladder and wheels; the bracket includes a support base and a support side frame connected to both sides of the support base; the step ladder is installed on one side of the support side frame, and the traction rod mounting joint is installed on the other side; one end of the traction rod is connected to the aircraft, and the other end is connected to the traction mounting joint through a connector; wheels are installed on the side of the support cross bar away from the ground.

[0008] As a preferred technical solution, the traction mounting joint includes at least two traction mounting plates, each of which is provided with a mounting hole, and at least two of the traction mounting plates are parallel to each other; the traction rod is installed between the two traction mounting plates.

[0009] As a preferred technical solution, the supporting side frame includes a first side frame strut and a second side frame strut; the first side frame strut is perpendicular to the supporting base frame, and a traction mounting joint is installed near one end of the supporting base frame; there is an acute angle between the second lateral strut and the supporting base frame, and the step ladder is installed on the second lateral strut.

[0010] As a preferred technical solution, the connecting piece is an installation locking pin.

[0011] As a preferred technical solution, a step ladder handrail is installed on the side of the support side frame where the step ladder is installed.

[0012] As a preferred technical solution, a push-pull handrail is installed on the side of the support side frame where the traction installation joint is installed.

[0013] As a preferred technical solution, the wheels include universal wheels and fixed wheels, the universal wheels are installed on one side of the support cross bar, and the fixed wheels are installed on the other side of the support cross bar; the universal wheels have a locking structure.

[0014] As a preferred technical solution, the step ladder includes a plurality of steps, and a step reinforcement structure is provided on a step away from the ground.

[0015] As a preferred technical solution, the pedal is provided with an anti-slip texture.

[0016] As a preferred technical solution, the pedal is a hollow pedal.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The present invention combines a work ladder and a tow bar installation connector for aircraft maintenance personnel training into one device. This device can replace an aircraft tow truck to implement tow bar connection operation training and can also be used as a work ladder, thus filling a gap in aircraft maintenance practical training equipment.

[0019] 2) The traction mounting joint of the utility model includes multiple traction mounting plates, which can adjust the installation height of the traction rod, ensuring that the two ends of the traction rod are connected on the same horizontal plane, preventing the generation of a component force perpendicular to the traction rod direction, and has a wide range of uses;

[0020] 3) The utility model provides push-pull handrails and step ladder handrails, which not only facilitates pushing and pulling of the traction rod hanging ladder and safe use of the step ladder, but also has a counterweight effect, maintains the stability of the traction rod hanging ladder, and is convenient for training and operation; universal wheels and fixed wheels are installed to make the traction rod hanging ladder easy to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the overall structure of a traction rod hanging ladder for skill training from a first perspective in the present utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of a traction rod hanging ladder for skill training from a second perspective of the present utility model;

[0023] Figure 3 This is a front view of a traction bar hanging ladder for skill training in the utility model;

[0024] Figure 4 This is a rear view of a traction bar hanging ladder for skill training in the utility model;

[0025] Figure 5 This is a cross-sectional view of a traction rod hanging ladder for skill training in the utility model;

[0026] Figure 6 This is a top view of a traction rod hanging ladder for skill training in the utility model;

[0027] Figure 7 This is a bottom view of a traction bar hanging ladder for skill training according to the utility model;

[0028] The numbers in the figure show:

[0029] 1. Bracket, 11. Supporting base frame, 12. Supporting side frame, 121. First side frame support rod, 122. Second side frame support rod, 21. Traction mounting plate, 211. Mounting hole, 3. Connector, 4. Step ladder, 41. Pedal, 42. Pedal reinforcement structure, 5. Wheel, 51. Universal wheel, 52. Fixed wheel, 6. Step ladder handrail, 7. Push-pull handrail. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0031] like Figure 1 and Figure 2 As shown, the utility model provides a traction rod hanging ladder for skill training, including a bracket 1, a traction installation joint, a connector 3, a step ladder 4 and wheels 5.

[0032] The bracket 1 includes a support base 11 and support side frames 12 connected to both sides of the support base 11. The support base 11 is a rectangle formed by four base frame struts connected end to end. The support side frames 12 include two first side frame struts 121 and two second side frame struts 122. The two first side frame struts 121 are perpendicular to the support base 11 and are installed on both sides of the support base 11. A traction mounting joint is installed near one end of the support base 11. The two second side frame struts form an acute angle with the support base 11 and are installed on both sides of the support base 11. The step ladder 4 is installed on the second side frame struts. Auxiliary support rods are also installed between the second side frame struts and the support base 11. The auxiliary support rods are perpendicular to the support base 11 and serve as auxiliary support. The step ladder handrail 6 is installed on the second side frame strut, and its length takes into account the push-pull operation of the counterweight and the traction rod hanging ladder. The push-pull handrail 7 is installed on the first side frame strut, which is mainly used for pushing and pulling, so as to adjust the position of the traction rod joint and facilitate the installation of the traction rod. The bracket 1 can be made of steel, and the length and angle of the support rod need to be adjusted according to the balance of the counterweight.

[0033] The height of the towing mounting joint is consistent with that of a common aircraft tractor. It includes at least two towing mounting tabs 21, three as shown in the figure, forming two towing rod mounting positions. The towing mounting tabs 21 are provided with mounting holes 211, and all towing mounting tabs 21 are parallel to each other. One end of the towing rod is installed between the towing rod mounting positions formed between the two towing mounting tabs 21, and the other end is connected to the aircraft. The towing rod can be horizontally adjusted by adjusting its mounting position on the towing mounting joint, so that the towing rod is not subjected to a pulling force perpendicular to the towing rod during towing, and is suitable for towing rods of different models. The towing mounting tabs 21 are provided with mounting holes 211, and the connector 3 passes through the mounting holes 211 to connect the towing mounting joint and the towing rod. The connector 3 can optionally be installed with a locking pin. The locking pin should be easy to remove and prevent, and ensure it is firmly installed after placement. The locking pin can be made of steel.

[0034] The step ladder 4 includes multiple treads 41 mounted between the two second lateral struts. The top tread 41 is provided with a tread reinforcement structure 42. Treads 41 can be hollow or have anti-slip textures. The step ladder 4 can be made of stainless steel. Considering the frequent contact with corrosive fluids in the maintenance environment, non-corrosion-resistant materials are not used.

[0035] Wheels 5 are mounted below the support frame 11 and include universal wheels 51 and fixed wheels 52. Universal wheels 51 are mounted near the step ladder 4, while fixed wheels 52 are mounted near the traction mounting joint. Universal wheels 51 have a locking function, allowing for quick adjustment of the traction bar ladder's direction and, once positioned, can be locked to prevent movement.

[0036] The working principle of this utility model is as follows:

[0037] The present invention combines a work ladder and a tow bar installation connector for aircraft maintenance personnel training into one device. When civil aviation maintenance training institutions teach according to the "Civil Aircraft Maintenance Basics Series Textbook" (Volume 8) - Aircraft Maintenance Practice, the present invention can replace the aircraft tow vehicle. After connecting the tow bar to the front landing gear of the aircraft, the trainees can install the other end of the tow bar to the corresponding tow bar installation position of the tow bar hanging ladder according to the tow bar height (depending on the tow bar model). Afterwards, the aircraft maintenance personnel can use the tow bar rocker arm to retract the tow bar moving wheel according to the tow bar connector installation diagram, thereby becoming familiar with and mastering the entire process of aircraft tow bar installation. At the same time, the utility model can also be used similar to a work ladder to access relevant areas of the aircraft. After locking the universal wheel 51, the present utility model is a fixed work ladder. After unlocking the universal wheel 51, the present utility model can be moved as needed.

[0038] The utility model has the following advantages:

[0039] 1. Fills a training equipment gap: Currently, there are no similar products in civil aviation maintenance training institutions. Most maintenance institutions can only complete training and instruction on the connection end of the towbar to the aircraft. Due to the lack of equipment that can simulate the aircraft and tractor, the other end of the towbar is usually not installed, making it impossible to fully train the entire process of installing the towbar to the aircraft and tractor. This utility model fills this training equipment gap, allowing training institutions to fully implement training and instruction based on the "Civil Aircraft Maintenance Basics Series Textbook" (Volume 8) - Aircraft Maintenance Practice, recommended by the China Civil Aviation Maintenance Association.

[0040] 2. Wide Range of Applications: This utility model can be used as the connection end of a simulator tractor, and is therefore primarily used on aprons, in hangars with ample space, or in training facilities. Therefore, the step ladder 4 inherent in this utility model is highly practical. The top working surface height of this utility model can be set to 1.2 meters, and the top step 41 is widened to 51 cm, making it usable as a maintenance platform. It can replace a single mobile ladder frame for various aircraft models, achieving multiple uses.

[0041] 3. Safety and reliability: Taking into account the possibility that trainees may make an error in selecting the installation height of the towbar joint when installing the aircraft towbar in the early stages of training. This error may cause the two installation points of the towbar to be not in the same plane after the moving wheels are retracted, resulting in vertical force at the connection point of this product. Therefore, the support side frame 12, the step ladder handrail 6 and the push-pull handrail 7 are used for counterweight to ensure the structural reliability of this product.

[0042] 4. Easy to move and fix: The bottom of the utility model uses two universal wheels 51 with locking function and two fixed wheels 52 to ensure small resistance during movement, easy movement, and stable after fixation.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A traction rod hanging ladder for skill training, connected to a traction rod, characterized in that: The traction rod hanging ladder comprises a bracket (1), a traction mounting joint, a connector (3), a step ladder (4) and wheels (5); the bracket (1) comprises a supporting base frame (11) and supporting side frames (12) connected to both sides of the supporting base frame (11); the step ladder (4) is installed on one side of the supporting side frame (12), and the traction rod mounting joint is installed on the other side; one end of the traction rod is connected to an aircraft, and the other end is connected to the traction mounting joint via the connector (3); the wheel (5) is installed on the side of the supporting cross bar away from the ground.

2. The traction rod hanging ladder for skill training according to claim 1, characterized in that: The traction mounting joint comprises at least two traction mounting pieces (21), each of which is provided with a mounting hole (211), and at least two of the traction mounting pieces (21) are parallel to each other; the traction rod is mounted between the two traction mounting pieces (21).

3. The traction rod hanging ladder for skill training according to claim 1, characterized in that: The supporting side frame (12) includes a first side frame support rod (121) and a second side frame support rod (122); the first side frame support rod (121) is perpendicular to the supporting base frame (11), and a traction mounting joint is installed near one end of the supporting base frame (11); the second lateral support rod and the supporting base frame (11) form an acute angle, and the step ladder (4) is installed on the second lateral support rod.

4. The traction rod hanging ladder for skill training according to claim 1, characterized in that: The connecting piece (3) is an installation locking pin.

5. The traction rod hanging ladder for skill training according to claim 1, characterized in that: A step ladder handrail (6) is installed on one side of the supporting side frame (12) where the step ladder (4) is installed.

6. The traction rod hanging ladder for skill training according to claim 1, characterized in that: A push-pull handrail (7) is installed on the side of the support side frame (12) where the traction installation joint is installed.

7. The traction rod hanging ladder for skill training according to claim 1, characterized in that: The wheel (5) comprises a universal wheel (51) and a fixed wheel (52), wherein the universal wheel (51) is mounted on one side of the supporting crossbar, and the fixed wheel (52) is mounted on the other side of the supporting crossbar; the universal wheel (51) has a locking structure.

8. The traction rod hanging ladder for skill training according to claim 1, characterized in that: The step ladder (4) comprises a plurality of pedals (41), and a pedal reinforcement structure (42) is provided on a pedal (41) away from the ground.

9. The traction rod hanging ladder for skill training according to claim 8, characterized in that: The pedal (41) is provided with anti-skid textures.

10. The traction rod hanging ladder for skill training according to claim 8, characterized in that: The pedal (41) is a hollow pedal (41).

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