Dragging carrier for aircraft maintenance

Abstract

The utility model discloses a dragging carrier for airplane maintenance. The dragging carrier comprises a frame provided with double rear wheels and a single front wheel. The front wheel is connected with the dragging control assembly, the dragging control assembly comprises a control box and a traction rod which are arranged at the front end of the frame, and the traction rod and the front wheel are connected into a whole. The control box comprises a first baffle and a second baffle which are arranged side by side, and a first limiting plate and a second limiting plate are connected between the first baffle and the second baffle. A rotating shaft is arranged at the bottom corner of the control box and transversely penetrates through the first baffle and the second baffle, and the traction rod is rotationally installed on the rotating shaft. The control box is further provided with a first pin hole and a second pin hole which transversely penetrate through the first baffle and the second baffle, and limiting bolts can be inserted into the first pin hole and the second pin hole in a pluggable mode. And the limiting bolt is matched with the first limiting plate or the second limiting plate to limit the traction rod in a vertical posture or a horizontal posture. According to the dragging carrier, the traction rod can be adjusted to be in a vertical posture or a horizontal posture, front wheels do not make contact with the surface during dragging, and the fault rate of the front wheels is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of airport ground maintenance equipment technology, and in particular to a towing vehicle for aircraft maintenance. Background Technology

[0002] In extremely cold regions, most airport towing vehicles currently in use are three-wheeled vehicles. The front wheels of these three-wheeled vehicles are steerable, while the rear wheels are mainly used to support maintenance equipment, such as heaters and generators. However, these three-wheeled vehicles have the following main drawbacks when used long-term in extremely cold weather:

[0003] 1) Because the front wheels also contact the ground during towing, the failure rate of related components of the front wheel assembly is high, and the damage or aging speed is fast, which will undoubtedly increase maintenance costs. In addition, the frequent replacement of front wheel assembly parts will also seriously affect the progress of airport maintenance operations.

[0004] 2) The tow bar connected to the front wheel assembly is a bare bar. In extremely cold weather, the front wheel assembly and tow bar are likely to break. If they break, the existing three-wheeled tow vehicle will become uncontrollable during rapid towing, and may easily collide with important airport facilities, resulting in poor safety. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a towing vehicle for aircraft maintenance to overcome the deficiencies in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An aircraft maintenance towing vehicle includes a frame with two rear wheels at the rear and a single front wheel at the front.

[0008] The front wheel is connected to a towing control assembly located at the front of the frame; the towing control assembly includes a control box fixedly located at the front of the frame and a traction rod rotatably located within the control box, the traction rod being connected to the front wheel as a single unit;

[0009] The control box includes a first baffle and a second baffle arranged side by side. A first limiting plate and a second limiting plate are connected between the first baffle and the second baffle. The first limiting plate is connected to the rear end of the first baffle and the second baffle, and the second limiting plate is connected to the front end of the first baffle and the second baffle.

[0010] The bottom corner of the control box is provided with a rotating shaft, which passes laterally through the first baffle and the second baffle. The traction rod is located between the first baffle and the second baffle and is rotatably mounted on the rotating shaft.

[0011] The control box is also provided with a first pin hole and a second pin hole that pass horizontally through the first baffle and the second baffle. The first pin hole is located near the first limiting plate, and the second pin hole is located near the second limiting plate. Limiting pins can be inserted and removed into the first pin hole and the second pin hole. The limiting pin in the first pin hole cooperates with the first limiting plate to limit the traction rod in an upright position, and the limiting pin in the second pin hole cooperates with the second limiting plate to limit the rotated traction rod in a flat position.

[0012] Furthermore, the towing control assembly also includes a retaining cable, which is arranged around both sides of the tow bar and the control box through several lugs, and the two ends of the retaining cable are fixed to the frame.

[0013] Furthermore, the frame is also provided with a carriage, and the carriage is provided with a support frame and a raised frame arranged side by side.

[0014] Preferably, a single door is provided on the side of the carriage near the raised platform.

[0015] Preferably, a button port is provided on the cover plate on the side of the carriage near the support frame.

[0016] Preferably, the top of the carriage is provided with a roof.

[0017] Preferably, the rear side of the carriage is without a baffle.

[0018] Preferably, the front end of the control box is also provided with a pair of support feet.

[0019] Preferably, the front wheel is a swivel wheel with a locking function.

[0020] Preferably, the control box is fixed to the vehicle frame by fasteners.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1) The towing vehicle for aircraft maintenance in this case is equipped with a towing control assembly. The towing control assembly uses a limiting pin in the first pin hole and a first limiting plate to limit the towing rod in an upright position; and uses a limiting pin in the second pin hole and a second limiting plate to limit the rotated towing rod in a horizontal position. This allows the towing rod to be adjusted to a horizontal position when towing is required, ensuring that the front wheel does not contact the ground, thereby reducing the failure rate of the front wheel-related components, extending the service life of the front wheel-related components, reducing maintenance costs, and improving the progress of airport maintenance operations.

[0023] 2) The aircraft maintenance towing vehicle of this case is equipped with a retaining steel cable. The retaining steel cable is arranged around both sides of the tow bar and the control box through lugs, and the two ends of the retaining steel cable are fixed to the frame. When the tow bar or the control box breaks accidentally, the retaining steel cable can flexibly connect the towing control components together to avoid the frame from colliding with important airport facilities during rapid towing and enhance the safety of the towing process.

[0024] To provide a clearer understanding of this invention, the preferred embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a three-dimensional rendering of the present invention;

[0026] Figure 2 This is a side view structural schematic diagram of the utility model;

[0027] Figure 3 This is a schematic diagram of the dragging control component in this utility model;

[0028] Figure 4 This is a reference diagram showing the usage state of this utility model;

[0029] Figure 5 This is a schematic diagram of the dragging control component in Embodiment 2 of this utility model.

[0030] Attached image labels:

[0031] 1-Frame, 2-Rear wheel, 3-Front wheel, 4-Support frame, 5-Elevation frame, 51-Single door, 52-Button port; 61-Tether rod, 62-First baffle, 63-Second baffle, 64-First limiting plate, 65-Second limiting plate, 66-Shaft, 67-First pin hole, 68-Second pin hole, 69-Support foot; 71-Holding cable, 72-Hearing loop. Detailed Implementation

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] Furthermore, if terms such as "first" or "second" are used for descriptive purposes only, they are mainly used to distinguish different devices, components or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, components or parts, and should not be construed as indicating or implying relative importance.

[0034] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral 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; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] Example 1

[0036] Please also refer to Figure 1-4 This utility model provides a towing vehicle for aircraft maintenance, including a frame 1, with double rear wheels 2 at the rear of the frame 1 and a single front wheel 3 at the front of the frame 1. The front wheel 3 is connected to a towing control assembly located at the front of the frame 1.

[0037] Furthermore, a carriage is also provided on the frame 1, and a support frame 4 and a raised frame 5 are arranged side by side inside the carriage; the support frame 4 is used to support the heat dissipation components of the heater, the raised frame 5 is used to place the generator, and the space at the bottom of the support frame 4 and the raised frame 5 is used to place the oil tank of the heater.

[0038] Furthermore, a single door 51 is provided on the side of the carriage near the raised frame 5, which facilitates starting the generator after opening the door; a button port 52 is provided on the cover plate on the side of the carriage near the support frame 4, which facilitates the use of a person to reach into the button port 52 to start and stop the heating machine.

[0039] Furthermore, the rear of the carriage is designed without baffles to facilitate the connection of the heating unit and the positioning pipes.

[0040] Furthermore, the top of the carriage is equipped with a cover to provide shelter and protection for the heating unit, generator, and fuel tank inside the carriage.

[0041] The towing control assembly includes a control box fixedly mounted at the front end of the frame 1 and a tow bar 61 rotatably mounted inside the control box. The tow bar 61 is connected to the front wheel 3 as a whole, and the control box is fixed to the frame 1 by fasteners.

[0042] The control box includes a first baffle 62 and a second baffle 63 arranged side by side. A first limiting plate 64 and a second limiting plate 65 are connected between the first baffle 62 and the second baffle 63. The first limiting plate 64 is connected to the rear end of the first baffle 62 and the second baffle 63, and the second limiting plate 65 is connected to the front end of the first baffle 62 and the second baffle 63.

[0043] A rotating shaft 66 is provided at the bottom corner of the control box. The rotating shaft 66 passes through the first baffle 62 and the second baffle 63 laterally. The traction rod 61 is located between the first baffle 62 and the second baffle 63 and is rotatably mounted on the rotating shaft 66 through a bearing.

[0044] The control box is also provided with a first pin hole 67 and a second pin hole 68 that pass horizontally through the first baffle 62 and the second baffle 63. The first pin hole 67 is located near the first limiting plate 64, and the second pin hole 68 is located near the second limiting plate 65. Limiting pins can be inserted and removed into the first pin hole 67 and the second pin hole 68. The limiting pin in the first pin hole 67 and the first limiting plate 64 cooperate to limit the traction rod 61 in an upright position. The limiting pin in the second pin hole 68 and the second limiting plate 65 cooperate to limit the rotated traction rod 61 in a flat position.

[0045] Furthermore, the front end of the control box is also provided with a pair of support feet 69. When the towing rod 61 is limited to a horizontal position, the towing vehicle can be kept flat on the ground by touching the ground with the support feet 69.

[0046] Preferably, in this embodiment, the front wheel 3 of the towing vehicle is a swivel wheel with a locking function.

[0047] Working principle:

[0048] 1. When the heating unit or other equipment on this towing vehicle needs to be transferred, first rotate the tow rod 61 to a flat position, and insert a limiting pin into the second pin hole 68. At this time, the limiting pin in the second pin hole 68 and the second limiting plate 65 cooperate to limit the rotated tow rod 61 to a flat position. At this time, the front wheels 3 of this towing vehicle are off the ground. Then, the tow rod 61 is connected to the airport towing vehicle, and the towing vehicle can tow this towing vehicle, which only has rotating rear wheels, to its destination. Since the front wheels 3 do not contact the ground during towing, the failure rate of the front wheels 3 is reduced.

[0049] 2. When the heating unit and other equipment on this towed vehicle need to be operated in place at the maintenance station, first rotate the tow rod 61 to the upright position, and insert the limiting pin into the first pin hole 67. At this time, the limiting pin in the first pin hole 67 and the first limiting plate 64 cooperate to limit the rotated tow rod 61 to the upright position. At this time, the single front wheel 3 and the double rear wheel 2 of this towed vehicle are in contact with the ground. Maintenance personnel can easily push and pull this towed vehicle to a suitable position, and then start the generator and heating unit to carry out maintenance work.

[0050] Example 2

[0051] Please also refer to Figure 1-5 The difference between Embodiment 2 and Embodiment 1 lies in the towing control assembly. Embodiment 2's towing control assembly further includes a retaining cable 71. The retaining cable 71 is wound around both sides of the tow bar 61 and the control box via several lugs 72, and both ends of the retaining cable 71 are fixed to the frame 1. The retaining cable 71 is used to flexibly connect the towing control assembly together in the event of an accidental breakage of the tow bar 61 or the control box, preventing the vehicle from colliding with important airport facilities during rapid towing and enhancing the safety of the towing process.

[0052] Compared to existing technologies, the towing vehicle for aircraft maintenance in this case adjusts the towing rod to a flat position when towing is required, ensuring that the front wheels do not touch the ground, thereby reducing the failure rate of front wheel-related components.

[0053] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A towing vehicle for aircraft maintenance, comprising a frame (1), a double rear wheel (2) arranged at the rear of the frame (1), and a single front wheel (3) arranged at the front of the frame (1), characterized in that: the front wheel (3) is connected with a towing control assembly arranged at the front of the frame (1); the towing control assembly comprises a control box fixedly arranged at the front end of the frame (1) and a traction rod (61) rotatably arranged in the control box, the traction rod (61) being connected with the front wheel (3) as a whole; the control box comprises a first baffle (62) and a second baffle (63) arranged side by side, a first limiting plate (64) and a second limiting plate (65) being connected between the first baffle (62) and the second baffle (63), the first limiting plate (64) being connected at the rear end of the first baffle (62) and the second baffle (63), and the second limiting plate (65) being connected at the front end of the first baffle (62) and the second baffle (63); a rotating shaft (66) is arranged at the bottom corner of the control box, the rotating shaft (66) transversely penetrating the first baffle (62) and the second baffle (63), and the traction rod (61) is located between the first baffle (62) and the second baffle (63) and is rotatably arranged on the rotating shaft (66); the control box is further provided with a first pin hole (67) and a second pin hole (68) transversely penetrating the first baffle (62) and the second baffle (63), the first pin hole (67) being located close to the first limiting plate (64), the second pin hole (68) being located close to the second limiting plate (65), and a limiting pin being pluggably arranged in each of the first pin hole (67) and the second pin hole (68); the limiting pin in the first pin hole (67) cooperates with the first limiting plate (64) to limit the traction rod (61) in an upright posture, and the limiting pin in the second pin hole (68) cooperates with the second limiting plate (65) to limit the traction rod (61) in a horizontal posture after being rotated. The towing control assembly further comprises a retaining cable (71) which is arranged along the two sides of the traction rod (61) and the control box through a plurality of ear holes (72) and is fixed at the frame (1) at both ends. The frame (1) is further provided with a carriage, and a support frame (4) and a heightening frame (5) are arranged side by side in the carriage. A single door (51) is arranged on the side of the carriage close to the heightening frame (5). A button opening (52) is arranged on the cover plate on the side of the carriage close to the support frame (4).

2. A tug for aircraft maintenance as claimed in claim 1, characterised in that: A top cover is arranged on the top of the carriage.

3. A tug for aircraft maintenance as claimed in claim 2, characterised in that: The rear side of the carriage is provided without a baffle.

4. A tug for aircraft maintenance as claimed in claim 3, characterised in that: A pair of support feet (69) are further arranged at the front end of the control box.

5. A tug for aircraft maintenance as claimed in claim 3, wherein: The front wheel (3) is a universal wheel with a locking function.

6. A tug for aircraft maintenance as claimed in claim 3, characterised in that: The control box is fixed to the frame (1) by fasteners.

7. A tug for aircraft maintenance as claimed in claim 3, characterised in that: ​ 8. A tug for aircraft maintenance as claimed in claim 3, characterised in that: ​ 9. A tug for aircraft maintenance as claimed in claim 3, characterised in that: ​ 10. A tug for aircraft maintenance as claimed in claim 3, characterised in that: ​

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