Light airplane brake oil filling device

Abstract

The utility model relates to a light airplane brake oil filling device which comprises a rectangular frame-shaped frame, a plurality of wheels are fixedly connected to the bottom of the frame, a rectangular oil storage tank box is fixedly connected to the top of the frame, a vertical partition plate is fixedly connected to the middle of the oil storage tank box in an inserted mode, and a tank cavity in the oil storage tank box is divided into an oil filling cavity and an oil return cavity through the partition plate. A manual refueling pump is fixedly inserted into a refueling cavity of the oil storage tank box, an oil supply connector is arranged on the manual refueling pump, a refueling hose is fixedly connected to the oil supply connector, and a refueling connecting pipe is fixedly connected to the tail end of the refueling hose. A transparent oil return hose is arranged in the oil return cavity of the oil storage tank box, and the tail end of the transparent oil return hose is fixedly connected with an oil return connector. The filling device is simple and compact in structure, can be conveniently connected with a brake oil way on an airplane, can realize accurate filling of brake oil, and effectively discharges air in a brake system through a pressure system in a filling mode from bottom to top.

Description

Technical Field

[0001] This utility model relates to the technical field of refueling devices, and more specifically to a brake fluid refueling device for light aircraft. Background Technology

[0002] With the continuous development of aviation technology, light aircraft are increasingly widely used in both civilian and military fields. As a key component for safe aircraft landing, the performance stability and reliability of the braking system are crucial. The aircraft braking system is a vital part of takeoff and landing, helping the aircraft to safely decelerate and stop on the ground. During landing, the braking system helps the aircraft slow down and stay on the runway; during takeoff, it helps the aircraft accelerate on the runway and maintain directional stability. In the braking system of light aircraft, brake fluid plays a vital role in transmitting braking pressure and lubricating brake components. Traditional brake fluid filling devices mostly use manual filling methods, which suffer from low filling efficiency, poor filling accuracy, and significant fluid waste. Furthermore, due to the relatively complex structure of the braking system of light aircraft, there are strict requirements on the amount and pressure of brake fluid added, which traditional filling methods cannot meet, thus affecting the performance and safety of the braking system. To address these issues, a new type of brake fluid filling device for light aircraft has been developed. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a light aircraft brake fluid filling device that can accurately fill brake fluid and effectively expel air from the brake system by filling from bottom to top through a pressure system.

[0004] A light aircraft brake fluid filling device includes a rectangular frame, with several wheels fixed to the bottom of the frame and a rectangular oil reservoir fixed to the top of the frame. A vertical partition is inserted and fixed in the middle of the oil reservoir, dividing the reservoir into a filling chamber and a return chamber. A manual filling pump is inserted and fixed in the filling chamber of the oil reservoir. The manual filling pump has a supply port, and a filling hose is fixed to the supply port. A filling connector is fixedly connected to the end of the filling hose. A transparent return hose is provided in the return chamber of the oil reservoir, and a return connector is fixedly connected to the end of the transparent return hose.

[0005] Preferably, the manual refueling pump includes a rectangular housing, with an opening at the bottom of the housing that is inserted into an oil storage tank. A pump body is fixedly connected to the housing, and a pressure rod is connected to the pump body. A pressure gauge, a one-way valve, and a pressure relief valve are installed and connected to the pump body. An oil suction pipe is connected to the oil supply interface, and the lower end of the oil suction pipe is close to the bottom of the oil storage tank.

[0006] Preferably, the end of the refueling hose is fixedly connected to a snap-fit ​​seat, which includes a cylindrical seat with a circular insertion port at the inlet. The outer wall of the seat has several recessed holes communicating with the insertion port, and ball bearings are inserted into these recessed holes. A locking sleeve is fitted onto the seat, and an annular anti-reverse ring is formed on the inner wall of the locking sleeve. The ball bearings abut against the inner wall of the anti-reverse ring. A spring is inserted into the locking sleeve below the anti-reverse ring, with its upper end pressing against the lower end face of the anti-reverse ring and its lower end pressing against the snap-fit ​​seat. A retaining ring abuts against the upper end face of the locking sleeve, and the retaining ring is formed on the outer wall of the seat.

[0007] The refueling connector includes a hydraulic connector, one end of which is fixedly connected to a threaded joint and the other end is fixedly connected to a snap-fit ​​connector. The snap-fit ​​connector includes a cylindrical plug, which is inserted into the socket of the connector. An annular groove is formed on the outer wall of the plug, and a ball is engaged in the groove of the plug.

[0008] Preferably, the partition plate has a return oil port formed in the middle, the housing of the manual refueling pump has an oil inlet connected to the return oil port, and the housing of the manual refueling pump is fixedly connected to a refueling port.

[0009] Preferably, a horizontal lifting base plate is inserted into the oil return chamber of the oil storage tank. The sides of the lifting base plate abut against the inner side wall and the partition of the oil storage tank. Several support columns are fixedly connected to the upper surface of the lifting base plate. A horizontal filter screen is fixedly connected to the upper end of the support columns. A vertical screw is inserted into the filter screen. The screw is screwed to the lifting base plate. The lower end of the screw is connected to a hinge base through a bearing. The hinge base is fixed to the oil storage tank. A knob is formed at the upper end of the screw.

[0010] Preferably, a vertical pressure-stabilizing guide tube is inserted into one side of the lifting base plate, and the lower end of the pressure-stabilizing guide tube is fixed in the oil storage tank and formed with a pressure-stabilizing port.

[0011] The beneficial effects of this utility model are as follows:

[0012] This refueling device has a simple and compact structure, is easy to connect to the aircraft's brake fluid circuit, and can accurately refuel the brake fluid. It also effectively removes air from the brake system by refueling from bottom to top using a pressure system. Attached Figure Description

[0013] Figure 1 This is a partial cross-sectional view of the present invention from the front.

[0014] Figure 2 This is a top view of the structure of this utility model;

[0015] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle.

[0016] In the diagram: 1. Frame; 2. Oil reservoir; 3. Wheel; 4. Partition; 5. Manual refueling pump; 51. Oil supply interface; 6. Refueling hose; 61. Snap-fit ​​connector; 7. Refueling connection pipe; 71. Hydraulic connection pipe; 72. Threaded connector; 73. Snap-fit ​​connector; 8. Transparent return oil hose; 9. Return oil connector; 10. Lifting base plate; 11. Support column; 12. Filter screen; 13. Lead screw; 14. Pressure stabilizing guide pipe. Detailed Implementation

[0017] Example: See Figures 1 to 3 As shown, a light aircraft brake fluid filling device includes a rectangular frame 1, with several wheels 3 fixed to the bottom of the frame 1, and a rectangular oil reservoir 2 fixed to the top of the frame 1. A vertical partition 4 is inserted and fixed in the middle of the oil reservoir 2, dividing the reservoir 2 into a filling chamber a and a return chamber b. A manual filling pump 5 is inserted and fixed in the filling chamber a of the oil reservoir 2. The manual filling pump 5 is provided with an oil supply interface 51, and a filling hose 6 is fixed to the oil supply interface 51. A filling connector 7 is fixedly connected to the end of the filling hose 6. A transparent return hose 8 is provided in the return chamber b of the oil reservoir 2, and a return connector 9 is fixedly connected to the end of the transparent return hose 8.

[0018] The manual refueling pump 5 includes a rectangular housing with an opening at the bottom that is inserted into the oil storage tank 2. A pump body is fixed to the housing, and a pressure rod is connected to the pump body. A pressure gauge, a one-way valve, and a pressure relief valve are installed and connected to the pump body. An oil suction pipe is connected to the oil supply interface 51, and the lower end of the oil suction pipe is close to the bottom of the oil storage tank 2. By reciprocating pressure with the pressure rod, the pump body can deliver brake fluid from the refueling chamber a to the refueling hose 6.

[0019] The end of the refueling hose 6 is fixedly connected to a snap-fit ​​seat 61. The snap-fit ​​seat 61 includes a cylindrical seat 611. The inlet of the seat 611 is formed with a circular insertion port 6111. The outer wall of the seat 611 is formed with a plurality of recesses 6112 that communicate with the insertion port 6111. A ball bearing 612 is inserted into the recesses 6112. A locking sleeve 613 is fitted on the seat 611. A circular anti-reverse ring 6131 is formed on the inner wall of the middle part of the locking sleeve 613. The ball bearing 612 abuts against the inner wall of the anti-reverse ring 6131. ​​A spring 614 is inserted into the locking sleeve 613 on the lower side of the anti-reverse ring 6131. ​​The upper end of the spring 614 presses against the lower end face of the anti-reverse ring 6131, and the lower end presses against the snap-fit ​​seat 61. A retaining ring abuts against the upper end face of the locking sleeve 613. The retaining ring is formed on the outer wall of the seat 611.

[0020] The refueling pipe 7 includes a hydraulic pipe 71, one end of which is fixedly connected to a threaded connector 72 and the other end is fixedly connected to a snap connector 73. The snap connector 73 includes a cylindrical plug 731, which is inserted into the socket 6111 of the connector 611. An annular groove 732 is formed on the outer wall of the plug 731, and a ball 612 is snapped into the groove 732 of the plug 731.

[0021] That is, by pulling down the locking sleeve 613, its ball 612 can retract and disengage from the slot 732, and the locking connector 73 can be pulled out. The oil return connector 9 at the end of the transparent oil return hose 8 also adopts the same locking structure, which facilitates the installation and connection of the oil filling pipe 7 and the oil return connector 9.

[0022] The partition 4 has a return port formed in the middle, and the housing of the manual oil pump 5 has an inlet port that communicates with the return port. The housing of the manual oil pump 5 is fixedly connected to an oil filling port. The brake fluid in the return chamber b can enter the filling chamber a from the return port and the inlet port.

[0023] The refueling hose 6 is made of black opaque tubing, while the transparent return hose 8 is made of red transparent tubing. The colors are used to distinguish them and prevent misalignment during installation.

[0024] A horizontal lifting base plate 10 is inserted into the oil return chamber b of the oil storage tank 2. The sides of the lifting base plate 10 abut against the inner side wall of the oil storage tank 2 and the partition plate 4, respectively. Several T-shaped support columns 11 are fixedly connected to the upper surface of the lifting base plate 10. A horizontal filter screen 12 is fixedly connected to the upper end of the support column 11. A vertical screw 13 is inserted into the filter screen 12. The screw 13 is screwed onto the lifting base plate 10. The lower end of the screw 13 is connected to a hinge base through a bearing. The hinge base is fixed to the oil storage tank 2. A knob is formed at the upper end of the screw 13. The brake oil after reflux first passes through the filter screen 12 and falls into the oil return chamber b on the upper side of the lifting base plate 10. After the brake oil in the oil return chamber b settles and eliminates air bubbles, the lifting base plate 10 is raised by rotating the screw 10, thereby moving the brake oil upward and allowing the brake oil to enter the filling chamber a through the oil return port and the oil inlet port.

[0025] A vertical pressure-stabilizing guide tube 14 is inserted into one side of the lifting base plate 10. The lower end of the pressure-stabilizing guide tube 14 is fixed in the oil storage tank box 2 and has a pressure-stabilizing port. The pressure-stabilizing guide tube 14 can be used for guidance and can also balance the pressure of the oil return chamber b on the upper and lower sides of the lifting base plate 10.

[0026] Working principle: This application proposes a light aircraft brake fluid filling device for refilling aircraft brake systems. The filling method is from bottom to top, with the filling end located at the bottom of the brake system and the return end at the top. The specific filling method is as follows:

[0027] Connect the refueling hose 7 to the brake caliper of the main landing gear of the light aircraft, and then connect the refueling hose 6 to the refueling hose 7. The external piping connection is now complete. Inside the cabin, connect the return oil connector 9 to the pump body at the rear of the co-pilot's brake pedal, and then connect the transparent return oil hose 8 to the return oil connector 9. The internal piping connection is now complete.

[0028] Open the aircraft brake control assembly. By pressing the lever on the manual refueling pump 5, brake fluid flows into the external fuel inlet pipe of the fuselage via pressure delivery. The brake fluid flows from the brake calipers through the brake lines on the landing gear support ribs, enters the central brake controller, and finally flows through the co-pilot's brake pedal pump body before returning to the reservoir 2. During the refueling process, the brake pedal needs to be manually pressed back and forth to simulate the braking action of the aircraft during operation. During this time, observe the air bubbles in the transparent return hose 8. Initially, a large number of air bubbles will be expelled. After pressing back and forth three to five times, no air bubbles will be visible. Finally, pressurize three to five times with the lever to complete the brake fluid refueling task.

[0029] The embodiments described herein are illustrative and not intended to limit the scope of the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A lightweight aircraft brake fluid filling device, comprising a rectangular frame-shaped chassis (1), a plurality of wheels (3) fixedly connected to the bottom of the chassis (1), and a rectangular oil reservoir (2) fixedly connected to the top of the chassis (1), characterized in that: A vertical partition (4) is inserted and fixed in the middle of the oil storage tank (2). The partition (4) divides the tank cavity inside the oil storage tank (2) into an oil filling chamber (a) and an oil return chamber (b). A manual oil filling pump (5) is inserted and fixed in the oil filling chamber (a) of the oil storage tank (2). The manual oil filling pump (5) is provided with an oil supply interface (51). An oil supply hose (6) is fixedly connected to the oil supply interface (51). An oil filling pipe (7) is fixedly connected to the end of the oil supply hose (6). A transparent oil return hose (8) is provided in the oil return chamber (b) of the oil storage tank (2). An oil return connector (9) is fixedly connected to the end of the transparent oil return hose (8).

2. The light aircraft brake fluid filling device according to claim 1, characterized in that: The manual refueling pump (5) includes a rectangular housing, with an opening at the bottom of the housing and inserted into the oil storage tank (2). A pump body is fixedly connected to the housing, and a pressure rod is connected to the pump body. A pressure gauge, a check valve, and a pressure relief valve are installed and connected to the pump body. An oil suction pipe is connected to the oil supply interface (51), and the lower end of the oil suction pipe is close to the bottom of the oil storage tank (2).

3. The light aircraft brake fluid filling device according to claim 1, characterized in that: The end of the refueling hose (6) is fixedly connected to a snap-fit ​​seat (61). The snap-fit ​​seat (61) includes a cylindrical connector (611). The inlet of the connector (611) is formed with a circular insertion port (6111). Several recesses (6112) communicating with the insertion port (6111) are formed on the outer wall of the connector (6111). Ball bearings (612) are inserted into the recesses (6112). A locking sleeve (613) is fitted on the connector (611). The locking sleeve (613) contains... An annular anti-reverse ring (6131) is formed on the inner wall of the part. A ball (612) abuts against the inner wall of the anti-reverse ring (6131). A spring (614) is inserted into the locking sleeve (613) on the lower side of the anti-reverse ring (6131). The upper end of the spring (614) presses against the lower end face of the anti-reverse ring (6131) and the lower end presses against the snap-fit ​​seat (61). A retaining ring abuts against the upper end face of the locking sleeve (613), and the retaining ring is formed on the outer wall of the seat (611). The refueling pipe (7) includes a hydraulic pipe (71), one end of which is fixedly connected to a threaded connector (72) and the other end is fixedly connected to a snap connector (73). The snap connector (73) includes a cylindrical plug (731), which is inserted into the socket (6111) of the connector (611). An annular groove (732) is formed on the outer wall of the plug (731), and a ball (612) is inserted into the groove (732) of the plug (731).

4. The light aircraft brake fluid filling device according to claim 2, characterized in that: The partition (4) has an oil return port formed in the middle, and the housing of the manual refueling pump (5) has an oil inlet connected to the oil return port. The housing of the manual refueling pump (5) is fixedly connected to the refueling port.

5. A light aircraft brake fluid filling device according to claim 4, characterized in that: A horizontal lifting base plate (10) is inserted into the oil return chamber (b) of the oil storage tank (2). The sides of the lifting base plate (10) abut against the inner side wall and the partition plate (4) of the oil storage tank (2). Several T-shaped support columns (11) are fixedly connected to the upper surface of the lifting base plate (10). A horizontal filter screen (12) is fixedly connected to the upper end of the support column (11). A vertical screw (13) is inserted into the filter screen (12). The screw (13) is screwed onto the lifting base plate (10). The lower end of the screw (13) is connected to a hinge base through a bearing. The hinge base is fixed onto the oil storage tank (2). A knob is formed at the upper end of the screw (13).

6. A light aircraft brake fluid filling device according to claim 5, characterized in that: A vertical pressure-stabilizing guide tube (14) is inserted into one side of the lifting base plate (10). The lower end of the pressure-stabilizing guide tube (14) is fixed in the oil storage tank (2) and has a pressure-stabilizing port.

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