Automatic brake structure of power trailer

Abstract

An automatic brake structure of a power supply trailer relates to the technical field of aircraft ground power supplies, when a traction rod is accidentally separated from a tractor in the process that the tractor pulls a trailer chassis to walk through the traction rod, the traction rod rotates downwards under the action of gravity, and at the moment, a bidirectional brake unit at the lower end of the traction rod makes contact with front wheels to generate friction force; and the chassis of the trailer can be timely braked. The whole power supply trailer can be automatically braked when the tractor is accidentally separated from the traction rod, the braking distance of the power supply trailer during automatic braking is greatly reduced, and the safety of the power supply trailer during traction is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft ground power supply, and in particular to an automatic braking structure of a power supply trailer. Background Art

[0002] When the aircraft ground power trailer is in use, it is generally towed to the vicinity of the aircraft by a tractor. When the tractor tows the power trailer, the tractor uses an axle pin to connect the tractor to the towing rod on the power trailer. However, during driving, due to uncertain factors such as vibration, the axle pin connecting the towing rod of the power trailer may not be fixed tightly, resulting in the risk of separation. As a result, the power trailer is separated from the tractor's towing. In the absence of automatic brakes, the power trailer is likely to collide with the aircraft or ground crew, causing the risk of personal injury or property loss. Summary of the invention

[0003] In order to overcome the deficiencies of the above technologies, the utility model provides a structure which can automatically brake when a power source trailer is separated from the traction of a tractor.

[0004] The technical solution adopted by the utility model to overcome the technical problems is:

[0005] An automatic brake structure for a power trailer includes a trailer chassis, a power source arranged on the trailer chassis, and rear wheels rotatably mounted on the left and right sides of the rear end of the trailer chassis, including:

[0006] A front wheel frame is rotatably mounted on the front end of the trailer chassis via a rotating shaft, and a front wheel is rotatably mounted on the front wheel frame;

[0007] A drawbar, rotatably mounted on the front end of the front wheel frame via a pin I; and

[0008] The two-way brake unit is installed at the lower end of the tow bar. When the tow bar is connected to the tractor and the trailer chassis is driven by the tractor, the two-way brake unit does not contact the front wheel. When the tow bar is in a vertical state, the two-way brake unit is in friction contact with the front wheel. When the tow bar is accidentally detached from the tractor, the two-way brake unit is in friction contact with the front wheel.

[0009] Furthermore, the above-mentioned two-way brake unit includes a vertical brake plate and a flat brake plate installed at the lower end of the traction rod. The flat brake plate and the vertical brake plate are arranged in a V shape. The flat brake plate is located at the front end of the vertical brake plate. When the traction rod is in a vertical state, the vertical brake plate is in friction contact with the front wheel. When the traction rod is accidentally detached from the tractor, the flat brake plate is in friction contact with the front wheel.

[0010] In order to increase the friction force, a grass-patterned roller belt is installed at the lower end of the flat brake plate.

[0011] In order to improve safety, a locking mechanism I is also included. When the traction rod is in a vertical state and the brake plate is in frictional contact with the front wheel (5), the locking mechanism I locks and fixes the traction rod relative to the front wheel frame.

[0012] Furthermore, the locking mechanism I comprises a limit frame rotatably mounted on the traction rod via a pin shaft II and a limit plate mounted on the front wheel frame, a hook head being mounted on the inner end of the limit frame, and when the traction rod is in a vertical state and the brake plate is in frictional contact with the front wheel, the limit frame rotates until the hook head is hooked on the limit plate.

[0013] In order to improve safety, a locking mechanism II is also included. When the traction rod is separated from the tractor and the flat brake plate is in frictional contact with the front wheel, the locking mechanism II locks the traction rod relative to the front wheel frame.

[0014] Furthermore, the locking mechanism II includes a locking box installed on the outer end of the front wheel frame, a pin horizontally slidably inserted in the locking box, a spring sleeved on the pin, and a locking block installed on the inner end of the pin, one end of the spring is connected to the locking box, and the other end is connected to the pin, the inner end surface of the locking block is an inclined guide slope, when the flat brake plate rotates downward to contact the guide slope, it pushes the locking block to slide outward under the guidance of the locking box using the pin during its downward movement, and when the flat brake plate is in friction contact with the front wheel, the flat brake plate is located below the locking block.

[0015] In order to improve the convenience of operation, a handle is provided on the traction rod.

[0016] In order to improve the convenience of operation, a pull ring is installed at the head end of the pin.

[0017] The beneficial effect of the utility model is that when the tractor pulls the trailer chassis through the traction rod and the traction rod is accidentally separated from the tractor, the traction rod rotates downward under the action of gravity, and the two-way brake unit at the lower end of the traction rod generates friction after contacting the front wheel, so that the trailer chassis can be braked in time. When the tractor and the traction rod are accidentally separated, the entire power trailer can brake automatically, which greatly reduces the braking distance of the power trailer when it brakes automatically and increases the safety of the power trailer when towing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the state of the traction rod of the utility model being in an upright state and the upright brake plate being in contact with the front wheel;

[0020] Figure 3 It is a schematic diagram of the state in which the traction rod of the utility model is hanging down;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the front wheel frame of the utility model;

[0022] Figure 5 It is a side view structural diagram of the front wheel part of the utility model;

[0023] Figure 6 for Figure 5 AA section structure diagram in;

[0024] In the figure, 1. trailer chassis 2. power supply 3. rear wheel 4. front wheel frame 5. front wheel 6. traction rod 7. limit frame 8. pin shaft I 9. rotating shaft 10. vertical brake plate 11. flat brake plate 12. pin shaft II 13. hook head 14. limit plate 15. grass-patterned roller belt 16. locking box 17. pull ring 18. pin 19. locking block 20. spring 21. guide slope 22. handle. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 To Attachment Figure 6 The utility model is further described.

[0026] A power trailer automatic brake structure comprises a trailer chassis 1, a power source 2 arranged on the trailer chassis 1, and rear wheels 3 rotatably mounted on the left and right sides of the rear end of the trailer chassis 1, including: a front wheel frame 4, which is rotatably mounted on the front end of the trailer chassis 1 through a rotating shaft 9, and a front wheel 5 is rotatably mounted on the front wheel frame 4; a traction rod 6, which is rotatably mounted on the front end of the front wheel frame 4 through a pin shaft Ⅰ 8; and a two-way brake unit, which is mounted on the lower end of the traction rod 6, when the traction rod 6 is connected to a tractor and the trailer chassis 1 is driven by the tractor, the two-way brake unit does not contact the front wheel 5, when the traction rod 6 is in a vertical state, the two-way brake unit is in friction contact with the front wheel 5, when the traction rod 6 is accidentally detached from the tractor, the two-way brake unit is in friction contact with the front wheel 5. When the power source 2 is not in use, that is, the trailer chassis 1 is in a parked state, the towing rod 6 is rotated upward to a vertical state. At this time, the two-way brake unit at the lower end of the towing rod 6 generates friction after contacting the front wheel 5, so that the front wheel 5 is in a braking state, ensuring that the trailer chassis 1 does not move. When the towing rod 6 accidentally separates from the towing vehicle while the towing vehicle is pulling the trailer chassis 1 through the towing rod 6, the towing rod 6 rotates downward under the action of gravity. At this time, the two-way brake unit at the lower end of the towing rod 6 generates friction after contacting the front wheel 5, so that the trailer chassis 1 can be braked in time. When the towing vehicle accidentally separates from the towing rod 6, the entire power trailer can brake automatically, which greatly reduces the braking distance of the power trailer when it automatically brakes and increases the safety of the power trailer when towing.

[0027] In one embodiment of the utility model, the two-way brake unit includes a vertical brake plate 10 and a flat brake plate 11 installed at the lower end of the traction rod 6. The flat brake plate 11 and the vertical brake plate 10 are arranged in a V shape. The flat brake plate 11 is located at the front end of the vertical brake plate 10. When the traction rod 6 is in a vertical state, the vertical brake plate 10 is in friction contact with the front wheel 5. When the traction rod 6 is accidentally separated from the tractor, the flat brake plate 11 is in friction contact with the front wheel 5. The two-way brake unit composed of the flat brake plate 11 and the vertical brake plate 10 can realize the braking of the front wheel 5 according to the position of the traction rod 6, and the operation is simple and convenient.

[0028] In one embodiment of the utility model, a grass-patterned roller belt 15 is installed at the lower end of the flat brake plate 11. By setting the grass-patterned roller belt 15, when the flat brake plate 11 rotates downward, the grass-patterned roller belt 15 contacts the front wheel 5, thereby increasing friction and improving the braking effect.

[0029] In one embodiment of the utility model, a locking mechanism I is also included. When the traction rod 6 is in a vertical state and the brake plate 10 is in frictional contact with the front wheel 5, the locking mechanism I locks the traction rod 6 relative to the front wheel frame 4. By setting the locking mechanism I, the position of the traction rod 6 can be fixed, ensuring that the front wheel 5 is always in a braking state when the trailer chassis 1 is parked, thereby improving the reliability of use. Preferably, the locking mechanism I can be the following structure, which includes a limit frame 7 rotatably mounted on the traction rod 6 through a pin shaft II 12 and a limit plate 14 mounted on the front wheel frame 4. The inner side end of the limit frame 7 is mounted with a hook head 13. When the traction rod 6 is in a vertical state and the brake plate 10 is in frictional contact with the front wheel 5, the limit frame 7 rotates until the hook head 13 is hooked on the limit plate 14. By rotating the limit frame 7 to hook the hook head 13 on the limit plate 14, the traction rod 6 cannot rotate forward, thereby achieving locking. When the lock needs to be released, the traction rod 6 is rotated in the reverse direction to disengage the hook head 13 from the limiting plate 14, which is easy to operate.

[0030] In one embodiment of the utility model, a locking mechanism II is further included. When the traction rod 6 is separated from the tractor and the flat brake plate 11 is in frictional contact with the front wheel 5, the locking mechanism II locks the traction rod 6 relative to the front wheel frame 4. The locking mechanism II can fix the position of the traction rod 6, ensuring that when the traction rod 6 is accidentally separated from the tractor, the flat brake plate 11 is always in frictional contact with the front wheel 5, thereby improving the braking reliability. Preferably, the locking mechanism II can be as follows, which includes a locking box 16 installed on the outer end of the front wheel frame 4, a pin 18 horizontally slidably inserted in the locking box 16, a spring 20 sleeved on the pin 18, and a locking block 19 installed on the inner end of the pin 18, one end of the spring 20 is connected to the locking box 16, and the other end is connected to the pin 18, the inner end surface of the locking block 19 is an inclined guide slope 21, when the flat brake plate 11 rotates downward to contact the guide slope 21, it pushes the locking block 19 to slide outward under the guidance of the locking box 16 using the pin 18 during its downward movement, and the spring 20 is compressed at this time, when the flat brake plate 11 is in frictional contact with the front wheel 5, the spring 20 releases the elastic force, pushing the locking block 19 to move inward, so that the flat brake plate 11 is located below the locking block 19, and at this time the locking block 19 can prevent the traction rod 6 from moving upward, ensuring that the flat brake plate 11 can always be in contact with the front wheel 5 to generate braking force. When the lock needs to be released, the pin 18 is pulled outward, so that the locking block 19 can be easily pulled out to release the lock on the flat brake plate 11.

[0031] In one embodiment of the utility model, a handle 22 is provided on the traction rod 6. The traction rod 6 can be easily pulled up by the handle 22, thereby improving the convenience of operation.

[0032] In one embodiment of the present invention, a pull ring 17 is installed at the head end of the pin 18. The pull ring 17 can be used to conveniently pull the pin 18 outward, further improving the convenience of use.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic brake structure for a power trailer, comprising a trailer chassis (1), a power source (2) arranged on the trailer chassis (1), and rear wheels (3) rotatably mounted on the left and right sides of the rear end of the trailer chassis (1), characterized in that: include: A front wheel frame (4) is rotatably mounted on the front end of the trailer chassis (1) via a rotating shaft (9), and a front wheel (5) is rotatably mounted on the front wheel frame (4); A traction rod (6) is rotatably mounted on the front end of the front wheel frame (4) via a pin shaft I (8); as well as A two-way brake unit is mounted on the lower end of a towing rod (6). When the towing rod (6) is connected to a towing vehicle and the towing vehicle drives the trailer chassis (1) to move, the two-way brake unit does not contact the front wheel (5). When the towing rod (6) is in a vertical state, the two-way brake unit is in frictional contact with the front wheel (5). When the towing rod (6) is accidentally separated from the towing vehicle, the two-way brake unit is in frictional contact with the front wheel (5).

2. The automatic brake structure for a power trailer according to claim 1, characterized in that: The bidirectional brake unit comprises a vertical brake plate (10) and a flat brake plate (11) mounted at the lower end of the traction rod (6); the flat brake plate (11) and the vertical brake plate (10) are arranged in a V-shape; the flat brake plate (11) is located at the front end of the vertical brake plate (10); when the traction rod (6) is in a vertical state, the vertical brake plate (10) is in frictional contact with the front wheel (5); when the traction rod (6) is accidentally detached from the tractor, the flat brake plate (11) is in frictional contact with the front wheel (5).

3. The automatic brake structure for a power trailer according to claim 2, characterized in that: A grass-patterned roller belt (15) is mounted on the lower end of the flat brake plate (11).

4. The automatic brake structure for a power trailer according to claim 2, characterized in that: It also includes a locking mechanism I, which locks and fixes the traction rod (6) relative to the front wheel frame (4) when the traction rod (6) is in a vertical state and the brake plate (10) is in frictional contact with the front wheel (5).

5. The automatic brake structure for a power trailer according to claim 4, characterized in that: The locking mechanism I comprises a limit frame (7) rotatably mounted on the traction rod (6) via a pin shaft II (12) and a limit plate (14) mounted on the front wheel frame (4); a hook head (13) is mounted on the inner side end of the limit frame (7); when the traction rod (6) is in a vertical state and the brake plate (10) is in frictional contact with the front wheel (5), the limit frame (7) rotates until the hook head (13) is hooked on the limit plate (14).

6. The automatic brake structure for a power trailer according to claim 2, characterized in that: The invention also includes a locking mechanism II, which locks and fixes the traction rod (6) relative to the front wheel frame (4) when the traction rod (6) is separated from the flat brake plate (11) and is in frictional contact with the front wheel (5).

7. The automatic brake structure for a power trailer according to claim 6, characterized in that: The locking mechanism II comprises a locking box (16) mounted on the outer end of the front wheel frame (4), a pin (18) horizontally slidably inserted in the locking box (16), a spring (20) sleeved on the pin (18), and a locking block (19) mounted on the inner end of the pin (18), one end of the spring (20) is connected to the locking box (16), and the other end thereof is connected to the pin (18), the inner end surface of the locking block (19) is an inclined guide slope (21), when the flat brake plate (11) rotates downward to contact the guide slope (21), the locking block (19) is pushed to slide outward under the guidance of the locking box (16) by using the pin (18) during the downward movement, and when the flat brake plate (11) is in frictional contact with the front wheel (5), the flat brake plate (11) is located below the locking block (19).

8. The automatic brake structure for a power trailer according to claim 1, characterized in that: The traction rod (6) is provided with a handle (22).

9. The automatic brake structure for a power trailer according to claim 7, characterized in that: A pull ring (17) is installed at the head end of the pin (18).

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