Towing type aircraft service equipment trailer with automatic locking device

Abstract

The utility model relates to the technical field of aircraft service equipment transfer, in particular to a towed aircraft service equipment trailer with an automatic locking device, which comprises a trailer body and an automatic locking mechanism, and a tow bar is hinged to the front end of the trailer body; the automatic locking mechanism comprises a pull rod, a brake cable, an installation support and a brake assembly, the brake assembly is installed on the vehicle body through the installation support and is arranged close to the wheels, the front end of the pull rod is connected with the tow rod, the first end of the brake cable is connected to the rear end of the pull rod, and the second end of the brake cable is connected to the brake assembly. When the free end of the tow bar swings downwards to incline downwards, the pull rod can move along with the tow bar, so that the brake cable is pulled to enable the brake assembly to abut against and lock the wheels. When an airport worker releases the gripper on the tow bar, the tow bar swings downwards under the action of gravity until the free end inclines downwards, the brake cable is pulled to lock the wheels, and the gravity of the tow bar drives the brake cable to automatically complete the locking action.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft service equipment transportation, in particular to a towing aircraft service equipment trailer with an automatic locking device. Background Art

[0002] When an aircraft takes off and lands at an airport, it requires matching aircraft service equipment to meet specific needs. Since different aircraft take off and land at different locations within the airport, aircraft service equipment needs to be continuously transported within the airport to meet take-off and landing needs.

[0003] Currently, airport staff typically use towed trailers to transport aircraft service equipment. These trailers typically have a parking lock function. This lock allows the trailer to be locked after it has come to a complete stop, preventing it from rolling away and damaging airport equipment. However, if the trailer needs to be parked temporarily and the lock is not locked in time, or if the lock is forgotten after parking, the risk of the trailer rolling away still exists.

[0004] Therefore, there is an urgent need for a novel towing aircraft service equipment trailer with an automatic locking device to solve the above problems. Utility Model Content

[0005] (1) Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a towing-type aircraft service equipment trailer with an automatic locking device to solve the problem of the trailer slipping when the trailer is not locked.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned object, the towing aircraft service equipment trailer with an automatic locking device of the present invention comprises:

[0009] A vehicle body, wherein a plurality of wheels are provided on the vehicle body, and a tow bar is hingedly connected to the front end of the vehicle body, wherein a first end of the tow bar is hingedly connected to the vehicle body and a second end of the tow bar is a free end;

[0010] An automatic locking mechanism, the automatic locking mechanism comprising a pull rod, a brake cable, a mounting bracket, and a brake assembly, the brake assembly being mounted on the vehicle body via the mounting bracket and disposed proximate to the wheel, the front end of the pull rod being connected to the tow bar, the first end of the brake cable being connected to the rear end of the pull rod, and the second end of the brake cable being connected to the brake assembly;

[0011] When the free end of the tow bar is swung downward to tilt downward, the pull rod can follow the tow bar to pull the brake cable to cause the brake assembly to contact and lock the wheel.

[0012] Optionally, the plurality of wheels include a front wheel and a pair of rear wheels, and the brake assembly is arranged close to the rear wheels.

[0013] Optionally, a long hole is formed at the front end of the pull rod; a pull arm extends from the side of the pull rod, and a pin is provided on the free end of the pull arm, and the pin can move between the front end and the rear end of the long hole;

[0014] When the tow bar swings downward from a horizontal state to a state where the free end tilts downward, the pin shaft is located at the front end of the elongated hole, and the pull rod can move with the tow bar to pull the brake line; when the free end of the tow bar is vertically upward, the pin shaft is located at the rear end of the elongated hole.

[0015] Optionally, the towing aircraft service equipment trailer with an automatic locking device further comprises a parking lock mechanism;

[0016] The parking lock mechanism includes a first connecting rod, a second connecting rod, a roller shaft rotatably mounted on the vehicle body, and a locking plate fixed to the roller shaft, wherein the first end of the first connecting rod is hinged to the pin shaft, the second end of the first connecting rod is hinged to the first end of the second connecting rod, and the second end of the second connecting rod is fixed to the roller shaft;

[0017] When the free end of the tow bar is vertically upward, the locking plate can contact and lock the front wheel.

[0018] Optionally, a hook is hinged on the tow bar, and a hook seat is provided at the front end of the vehicle body; when the free end of the tow bar is vertically facing upward, the hook can be hung on the hook seat.

[0019] Optionally, the outer tube of the first end of the brake line is fixed to the baffle of the vehicle body, and the steel wire rope of the first end of the brake line is connected to the rear end of the pull rod;

[0020] The outer wire tube of the second end of the brake wire is fixed on the mounting bracket, and the steel wire rope of the second end of the brake wire is connected to the brake assembly.

[0021] Optionally, the mounting bracket includes a mounting plate extending downward from the bottom of the vehicle body and a mounting seat fixedly arranged on the mounting plate; the mounting plate and the mounting seat are both provided with a slide rod mounting hole;

[0022] The brake assembly includes a crossbar, a slide bar, a spring sleeved on the slide bar, and a brake pad fixed to the crossbar, wherein the brake pad is arranged close to the rear wheel, the first end of the slide bar is fixed to the crossbar, and the second end of the slide bar is provided with a nut after passing through the slide bar mounting hole, and the spring is squeezed between the crossbar and the mounting seat;

[0023] The outer wire tube of the second end of the brake wire is fixed on the mounting plate, and the steel wire rope of the second end of the brake wire is connected to the cross bar.

[0024] Optionally, the brake pad is a curved plate that matches the curvature of the outer peripheral surface of the rear wheel.

[0025] Optionally, the brake assembly includes a pair of brake pads, and the brake pads are arranged in a one-to-one correspondence with the rear wheels.

[0026] Optionally, a support frame for placing aircraft service equipment is provided above the vehicle body.

[0027] (3) Beneficial effects

[0028] In the towed aircraft service equipment trailer with an automatic locking device of the present invention, the front end of the vehicle body is also hinged with a tow rod, and the automatic locking mechanism includes a pull rod, a brake line, a mounting bracket and a brake assembly. The brake assembly is installed on the vehicle body through the mounting bracket and is arranged close to the wheel. The front end of the pull rod is connected to the tow rod, the first end of the brake line is connected to the rear end of the pull rod, and the second end of the brake line is connected to the brake assembly.

[0029] When the free end of the tow bar swings downward and tilts downward, the pull rod moves with it, pulling the brake cable to engage the brake assembly and lock the wheel. When airport staff release the handle on the tow bar, the tow bar swings downward under the action of gravity until the free end tilts downward. At this point, the brake cable is pulled to lock the wheel, eliminating the need for a separate locking operation. This allows for temporary parking in special circumstances, or when it is inconvenient or forgotten to lock the vehicle, the weight of the tow bar can automatically lock the brake cable to prevent the vehicle from rolling away. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a towing aircraft service equipment trailer with an automatic locking device according to the present invention;

[0031] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0032] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0033] Figure 4 for Figure 1 A top view of the middle structure;

[0034] Figure 5 for Figure 1 Schematic diagram of the structure after adding the parking lock mechanism;

[0035] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0036] [Description of Reference Numerals]

[0037] 10: Vehicle body; 11: Wheel; 111: Front wheel; 112: Rear wheel; 12: Tow bar; 121: Pull arm; 122: Pin; 123: Hook; 13: Support frame; 14: Baffle; 15: Hook seat;

[0038] 21: Pull rod; 211: Long hole; 22: Brake cable; 221: First clamping joint; 222: Second clamping joint; 23: Mounting bracket; 231: Mounting plate; 232: Mounting seat; 24: Brake assembly; 241: Crossbar; 242: Sliding rod; 243: Spring; 244: Brake pad; 245: Nut;

[0039] 31: First connecting rod; 32: Second connecting rod; 33: Roller shaft; 34: Locking plate. DETAILED DESCRIPTION

[0040] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can refer to fixed connection, detachable connection, or integration; "connection" can refer to mechanical connection or electrical connection; it can refer to direct connection or indirect connection through an intermediate medium; it can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0044] See also Figures 1 to 4 The present invention provides a towing aircraft service equipment trailer with an automatic locking device, which specifically includes a vehicle body 10 and an automatic locking mechanism. The vehicle body 10 is provided with a plurality of wheels 11. A tow bar 12 is hingedly connected to the front end of the vehicle body 10. The first end of the tow bar 12 is hinged to the vehicle body 10, and the second end of the tow bar 12 is a free end. The tow bar 12 can swing between a vertical upward free end and a downward tilted free end about the hinge axis. When the free end of the tow bar 12 is tilted upward, airport staff can conveniently use the handle on the free end of the tow bar 12 to tow the trailer. The automatic locking mechanism includes a pull rod 21, a brake cable 22, a mounting bracket 23, and a brake assembly 24. The brake assembly 24 is mounted on the vehicle body 10 via the mounting bracket 23 and is positioned near the wheels 11. The front end of the pull rod 21 is connected to the tow bar 12, the first end of the brake cable 22 is connected to the rear end of the pull rod 21, and the second end of the brake cable 22 is connected to the brake assembly 24. In a preferred embodiment, the plurality of wheels 11 include front wheels 111 and a pair of rear wheels 112, and the brake assembly 24 is disposed adjacent to the rear wheels 112. A support frame 13 is disposed above the vehicle body 10 for placing aircraft service equipment.

[0045] When the free end of the tow bar 12 swings downward and tilts downward, the pull rod 21 can move with the tow bar 12, thereby pulling the brake cable 22 to make the brake assembly 24 contact and lock the wheel 11. When the airport staff releases the grip on the tow bar 12, the tow bar 12 swings downward under the action of gravity until the free end tilts downward. At this time, the brake cable 22 is pulled to lock the wheel, and this process does not require additional locking operation. Therefore, in special circumstances where temporary parking is required or it is inconvenient or forgotten to lock the vehicle, the weight of the tow bar 12 can automatically drive the brake cable 22 to complete the locking action to prevent the vehicle from rolling away.

[0046] In a preferred embodiment, see Figure 2The front end of the pull rod 21 is provided with a long hole 211. A pull arm 121 extends from the side of the tow bar 12. The pull arm 121 extends outward along the radial direction of the tow bar 12. A pin 122 is provided on the free end of the pull arm 121. The pin 122 can move between the front end and the rear end of the long hole 211. When the tow bar 12 is in a horizontal state ( Figure 1 and Figure 2 When the pull rod 12 (shown by the dotted line) swings downward until the free end tilts downward, the pin 122 is located at the front end of the elongated hole 211, and the pull rod 21 can move with the towing rod 12 to pull the brake cable 22, thereby causing the brake assembly 24 to contact and lock the wheel 11. When the free end of the towing rod 12 is vertically upward, the pin 122 is located at the rear end of the elongated hole 211 (see Figure 5 and Figure 6 As the tow bar 12 swings upward from a horizontal position to a free end that is vertically upright, the pin 122 moves from the front end to the rear end within the elongated hole 211. At this time, the pull rod 21 does not move with the tow bar 12, and no tension is applied to the brake cable 22. The brake assembly 24 does not contact the wheel 11, thereby preventing additional burden on airport staff when towing the trailer.

[0047] like Figure 5 and Figure 6 As shown, the towed aircraft service equipment trailer with an automatic locking device also includes a parking lock mechanism. This mechanism comprises a first link 31, a second link 32, a roller shaft 33 rotatably mounted on the vehicle body 10, and a locking plate 34 fixed to the roller shaft 33. The first end of the first link 31 is hinged to the pin 122, the second end of the first link 31 is hinged to the first end of the second link 32, and the second end of the second link 32 is fixed to the roller shaft 33, thereby forming a four-bar linkage. When the free end of the tow bar 12 is vertically upward, the locking plate 34 contacts and locks the front wheel 111. After installation, the first end of the first link 31 and the pull rod 21 are spaced a certain distance apart along the axial direction of the pin 122 to prevent interference. When the airport staff tows the trailer to the designated location, they can push the pull rod 21 upward until the free end is vertically pointing upward. Under the action of the four-bar linkage, the locking plate 34 locks the front wheel 111, thereby completing the parking lock action and placing the trailer in the parking lock state. When the trailer needs to be towed again, the pull rod 21 can be pulled downward until the free end is tilted upward to release the parking lock state.

[0048] Furthermore, if Figure 2 and Figure 6As shown, a hook 123 is hingedly connected to the tow bar 12, with a pull arm 121 located between the hinged end of the tow bar 12 and the hook 123. A hook seat 15 is provided at the front end of the vehicle body 10. When the free end of the tow bar 12 is pointing vertically upward, airport staff can use their feet to control the rotation of the hook 123 so that the hook 123 is hooked to the hook seat 15, thereby allowing the locking plate 34 to lock the front wheel 111 and keep the trailer in the park lock state. To release the trailer from the park lock state, the airport staff can use their feet to control the rotation of the hook 123 in the opposite direction, thereby disengaging the hook 123 from the hook seat 15, allowing the tow bar 12 to swing downward.

[0049] In the present invention, the brake line 22 adopts a structure of a steel wire rope wrapped in an outer tube (similar to the brake line of a bicycle). Figure 2 and Figure 3 The outer wire tube of the first end of the brake wire 22 is fixed to the baffle 14 of the vehicle body 10 through the first clamping joint 221, and the steel wire rope of the first end of the brake wire 22 is connected to the rear end of the pull rod 21; the outer wire tube of the second end of the brake wire 22 is fixed to the mounting bracket 23 through the second clamping joint 222, and the steel wire rope of the second end of the brake wire 22 is connected to the brake assembly 24.

[0050] In a preferred embodiment, the mounting bracket 23 is disposed near the rear end of the vehicle body 10. Figure 3 The mounting bracket 23 includes a mounting plate 231 extending downward from the bottom of the vehicle body 10 and a mounting seat 232 fixedly mounted on the mounting plate 231; both the mounting plate 231 and the mounting seat 232 are provided with a slide rod mounting hole. Figure 3 and Figure 4 The brake assembly 24 includes a crossbar 241, a slide bar 242, a spring 243 mounted on the slide bar 242, and a brake pad 244 secured to the crossbar 241. The brake pad 244 is positioned near the rear wheel 112. The first end of the slide bar 242 is secured to the crossbar 241, and the second end of the slide bar 242 passes through a slide bar mounting hole and is provided with a nut 245 to axially limit the slide bar 242. The spring 243 is squeezed between the crossbar 241 and the mounting base 232. The outer tube at the second end of the brake cable 22 is secured to the mounting plate 231 via a second connector 222. The wire rope at the second end of the brake cable 22 is connected to the crossbar 241. When the wire rope of the brake cable 22 is tightened, it drives the crossbar 241 toward the mounting plate 231, overcoming the elastic force of the spring 243. At this time, the brake pad 244 simultaneously moves toward the rear wheel 112 until it contacts the rear wheel 112, thereby locking the rear wheel 112. When the steel wire rope of the brake line 22 is released, the elastic force of the spring 243 pushes the cross bar 241 to move away from the mounting plate 231 , and the brake pad 244 moves away from the rear wheel 112 simultaneously.

[0051] In order to ensure the effectiveness of automatic braking, Figure 3 As shown, the brake pad 244 is a curved plate that matches the curvature of the outer peripheral surface of the rear wheel 112. Figure 4 As shown, the brake assembly 24 includes a pair of brake pads 244 , and the brake pads 244 are arranged in a one-to-one correspondence with the rear wheels 112 .

[0052] It should be understood that the above description of the specific embodiments of the present invention is merely for the purpose of illustrating the technical approach and features of the present invention. Its purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, the present invention is not limited to the above-described specific embodiments. Any changes or modifications made within the scope of the claims of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A towing aircraft service equipment trailer with an automatic locking device, characterized in that: It includes: A vehicle body (10), wherein a plurality of wheels (11) are provided on the vehicle body (10), and a tow bar (12) is hingedly connected to the front end of the vehicle body (10), wherein a first end of the tow bar (12) is hingedly connected to the vehicle body (10) and a second end of the tow bar (12) is a free end; An automatic locking mechanism, comprising a pull rod (21), a brake line (22), a mounting bracket (23) and a brake assembly (24); the brake assembly (24) is mounted on the vehicle body (10) through the mounting bracket (23) and is arranged close to the wheel (11); the front end of the pull rod (21) is connected to the tow bar (12); the first end of the brake line (22) is connected to the rear end of the pull rod (21) and the second end of the brake line (22) is connected to the brake assembly (24); When the free end of the tow bar (12) swings downward to tilt downward, the pull rod (21) can follow the tow bar (12) to move, thereby pulling the brake line (22) to make the brake assembly (24) contact and lock the wheel (11).

2. The towing aircraft service equipment trailer with an automatic locking device according to claim 1, characterized in that: The plurality of wheels (11) include a front wheel (111) and a pair of rear wheels (112), and the brake assembly (24) is arranged close to the rear wheels (112).

3. The towing aircraft service equipment trailer with an automatic locking device according to claim 2, characterized in that: The front end of the pull rod (21) is provided with a long hole (211); a pull arm (121) extends from the side of the pull rod (12); a pin (122) is provided on the free end of the pull arm (121); the pin (122) is capable of moving between the front end and the rear end of the long hole (211); When the tow bar (12) swings downward from a horizontal state to a state where the free end tilts downward, the pin shaft (122) is located at the front end of the elongated hole (211), and the pull rod (21) can move following the tow bar (12) to pull the brake line (22); when the free end of the tow bar (12) is vertically upward, the pin shaft (122) is located at the rear end of the elongated hole (211).

4. The towing aircraft service equipment trailer with an automatic locking device according to claim 3, characterized in that: The towing aircraft service equipment trailer with automatic locking device also includes a parking lock mechanism; The parking lock mechanism comprises a first connecting rod (31), a second connecting rod (32), a roller shaft (33) rotatably mounted on the vehicle body (10), and a locking plate (34) fixed on the roller shaft (33); a first end of the first connecting rod (31) is hinged to the pin shaft (122); a second end of the first connecting rod (31) is hinged to the first end of the second connecting rod (32); and a second end of the second connecting rod (32) is fixed to the roller shaft (33); When the free end of the towing handle (12) is vertically upward, the locking plate (34) can contact and lock the front wheel (111).

5. The towing aircraft service equipment trailer with an automatic locking device according to claim 4, characterized in that: A hook (123) is also hinged on the tow bar (12), and a hook seat (15) is provided at the front end of the vehicle body (10); when the free end of the tow bar (12) is vertically upward, the hook (123) can be hung on the hook seat (15).

6. The towing aircraft service equipment trailer with an automatic locking device according to any one of claims 2 to 5, characterized in that: The outer wire tube of the first end of the brake wire (22) is fixed on the baffle (14) of the vehicle body (10), and the steel wire rope of the first end of the brake wire (22) is connected to the rear end of the pull rod (21); The outer wire tube of the second end of the brake wire (22) is fixed on the mounting bracket (23), and the steel wire rope of the second end of the brake wire (22) is connected to the brake assembly (24).

7. The towing aircraft service equipment trailer with an automatic locking device according to claim 6, characterized in that: The mounting bracket (23) includes a mounting plate (231) extending downward from the bottom of the vehicle body (10) and a mounting seat (232) fixedly arranged on the mounting plate (231); both the mounting plate (231) and the mounting seat (232) are provided with a slide rod mounting hole; The brake assembly (24) includes a cross bar (241), a slide bar (242), a spring (243) sleeved on the slide bar (242), and a brake pad (244) fixed on the cross bar (241), wherein the brake pad (244) is arranged close to the rear wheel (112), a first end of the slide bar (242) is fixed on the cross bar (241), and a nut (245) is arranged on the second end of the slide bar (242) after passing through the slide bar mounting hole, and the spring (243) is squeezed between the cross bar (241) and the mounting seat (232); The outer wire tube of the second end of the brake wire (22) is fixed on the mounting plate (231), and the steel wire rope of the second end of the brake wire (22) is connected to the cross bar (241).

8. The towing aircraft service equipment trailer with an automatic locking device according to claim 7, characterized in that: The brake pad (244) is a curved plate adapted to the curvature of the outer peripheral surface of the rear wheel (112).

9. The towing aircraft service equipment trailer with an automatic locking device according to claim 7, characterized in that: The brake assembly (24) includes a pair of brake pads (244), and the brake pads (244) are arranged in a one-to-one correspondence with the rear wheels (112).

10. The towing aircraft service equipment trailer with an automatic locking device according to any one of claims 1 to 5, characterized in that: A support frame (13) for placing aircraft service equipment is provided above the vehicle body (10).

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