Skid type landing gear with buffers

Abstract

The skid type undercarriage with the buffers comprises a left sliding pipe and a right sliding pipe, two sets of rocker arms are arranged on the sides, close to each other, of the left sliding pipe and the right sliding pipe, connecting mechanisms are arranged in the middles of the four sets of rocker arms, buffer mechanisms are arranged above the four sets of connecting mechanisms, and the buffer mechanisms are connected with the left sliding pipe and the right sliding pipe. Mounting mechanisms are arranged at the tops of the four sets of rocker arms, cross beam frames are arranged at the tops of the two sets of mounting mechanisms on the left side and the two sets of mounting mechanisms on the right side, two side fixing connectors are formed in the tops of the two sets of cross beam frames, and airplane dragging wheel connectors are formed in one side of a left sliding pipe and one side of a right sliding pipe. According to the utility model, the problems that when a helicopter lands, energy is absorbed mainly through bending deformation of the front and rear arch beams to play a buffering role, but the bearing capacity and the landing work absorbing capacity of the arch beams are limited, and the buffering performance is not good enough are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of helicopter landing gear, in particular to a skid-type landing gear with a buffer. Background Art

[0002] The landing gear is an accessory device at the bottom of the aircraft used to support the aircraft during takeoff and landing or taxiing on the ground and used for ground movement. The landing gear is the only component that supports the entire aircraft. If there is no landing gear, the fuselage of the aircraft will directly contact the ground when the aircraft lands, which can easily cause damage to the fuselage of the aircraft and cause greater vibration inside the fuselage of the aircraft. Setting a landing gear at the bottom of the aircraft can avoid the above problems. Therefore, the landing gear is an integral part of the aircraft. The landing gear is generally divided into two types: skid type and wheel type. The wheel type can be further divided into retractable and non-retractable types. The skid type landing gear is used for skid landing. The skid type landing gear is generally used for light helicopters. It has a simple and reliable structure and is easy to maintain. It can also be used as a buffer for unpowered spin landing.

[0003] When a helicopter lands, the bending deformation of the front and rear arched beams is mainly used to absorb energy and play a cushioning role. However, the arched beams have limited bearing capacity and ability to absorb landing work, and their cushioning performance is poor. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide a skid-type landing gear with a buffer, which can solve the problem that when a helicopter lands, the bending deformation of the front and rear arched beams is mainly used to absorb energy and play a buffering role, but the arched beams have limited bearing capacity and landing work absorption capacity, and the buffering performance is poor.

[0006] In order to solve the above technical problems, the utility model provides a skid-type landing gear with a buffer, which adopts the following technical solution: it includes a left slide tube and a right slide tube, and is characterized in that: two groups of rocker arms are provided on the side where the left slide tube and the right slide tube are close to each other, the middle parts of the four groups of rocker arms are provided with connecting mechanisms, the tops of the four groups of connecting mechanisms are provided with buffer mechanisms, the tops of the four groups of rocker arms are provided with mounting mechanisms, the tops of the two left groups of mounting mechanisms and the two right groups of mounting mechanisms are provided with crossbeam frames, the tops of the two groups of crossbeam frames are provided with fixed interfaces on both sides, and one side of the left slide tube and the right slide tube is provided with a tug wheel interface.

[0007] Optionally, a slide tube groove matched with the left slide tube is opened below the rocker arm, and four groups of slide tube holes are arranged in the slide tube groove.

[0008] By adopting the above technical solution, the beam frame is supported.

[0009] Optionally, the connecting mechanism includes two groups of connecting plates, and both groups of connecting plates are provided with connecting holes.

[0010] By adopting the above technical solution, the buffer mechanism is installed.

[0011] Optionally, the mounting mechanism includes two groups of mounting plates, a mounting hole is opened at the top of the rocker arm, the top of the rocker arm is inserted between the two groups of mounting plates, the two groups of mounting plates are threaded with mounting bolts, and the mounting bolts pass through the mounting holes.

[0012] By adopting the above technical solution, the beam frame is installed.

[0013] Optionally, the buffer mechanism includes a piston rod, a cylinder is sleeved on the left side of the piston rod, an air cavity is opened in the piston rod, a piston is provided on the left side of the piston rod, an inflation valve is provided on the right side of the air cavity, and a connecting rod is provided on the right side of the piston rod.

[0014] By adopting the above technical solution, buffering is performed.

[0015] Optionally, an oil chamber is opened in the cylinder, an oil needle is provided in the oil chamber, a guide sleeve is provided on the right side of the inner cavity of the cylinder, a sealing ring is provided between the guide sleeve and the piston rod, a cylinder bottom is provided on the left side of the cylinder, and joint bearings are provided on the cylinder bottom and the side of the connecting rod away from each other.

[0016] By adopting the above technical solution, the piston rod is matched.

[0017] Optionally, two sets of anti-wear plates are provided at the bottom of the left sliding tube and the bottom of the right sliding tube.

[0018] By adopting the above technical solution, the left sliding pipe and the right sliding pipe are protected.

[0019] In summary, the utility model includes at least one of the following beneficial effects: by setting a buffer mechanism, when the helicopter lands, the piston rod is compressed by the impact load. At this time, the built-in air chamber and the damping oil work together to generate a certain damping force to dissipate the impact energy and reduce the impact of the impact load on the helicopter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the rocker arm structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the buffer mechanism of the utility model.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. left slide tube; 2. right slide tube; 3. rocker arm; 301. slide tube groove; 302. slide tube hole; 303. mounting hole; 4. connecting mechanism; 401. connecting plate; 402. connecting hole; 5. buffer mechanism; 501. piston rod; 502. cylinder barrel; 503. connecting rod; 504. cylinder bottom; 505. spherical bearing; 6. mounting mechanism; 601. mounting plate; 602. mounting bolt; 7. crossbeam frame; 8. fixing interface; 9. tractor wheel interface; 10. anti-wear plate. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-3 The utility model is described in further detail.

[0026] Embodiment 1, refer to Figure 1 In this embodiment, in order to solve the problem that the bending deformation of the front and rear arched beams is mainly used to absorb energy and play a buffering role when the helicopter lands, but the arched beams have limited bearing capacity and landing work absorption capacity, and the buffering performance is poor, the utility model discloses a skid-type landing gear with a buffer, including a left slide tube 1 and a right slide tube 2, two groups of rocker arms 3 are arranged on the side where the left slide tube 1 and the right slide tube 2 are close to each other, connecting mechanisms 4 are arranged in the middle of the four groups of rocker arms 3, buffer mechanisms 5 are arranged above the four groups of connecting mechanisms 4, mounting mechanisms 6 are arranged on the tops of the four groups of rocker arms 3, crossbeam frames 7 are arranged on the tops of the two left groups of mounting mechanisms 6 and the two right groups of mounting mechanisms 6, and two side fixing interfaces 8 are arranged on the tops of the two groups of crossbeam frames 7, and tractor wheel interfaces 9 are arranged on one side of the left slide tube 1 and the right slide tube 2.

[0027] Based on the above features, the working principle of this embodiment is: when the helicopter lands, the impact load is transmitted to the four groups of rocker arms 3 through the left sliding tube 1 and the right sliding tube 2 respectively, and then transmitted to the four groups of buffer mechanisms 5 through the four groups of rocker arms 3, and consumed by the buffer mechanisms 5 to reduce the impact of the impact load on the helicopter, and the rocker arms 3 are fixed to the crossbeam frame 7 by setting the installation mechanism 6, and the crossbeam frame 7 is fixed to the bottom of the helicopter by setting the fixing interface 8.

[0028] Example 2, refer to Figure 2-3 In this embodiment, in order to solve the problem that the bending deformation of the front and rear arched beams is mainly used to absorb energy and play a buffering role when the helicopter lands, but the arched beams have limited bearing capacity and landing work absorption capacity, and the buffering performance is poor, based on the same concept as the above-mentioned embodiment 1, the skid-type landing gear with a buffer also includes a slide tube groove 301 adapted to the left slide tube 1 below the rocker arm 3, and four groups of slide tube holes 302 are arranged in the slide tube groove 301, the connecting mechanism 4 includes two groups of connecting plates 401, and the two groups of connecting plates 401 are provided with connecting holes 402, the mounting mechanism 6 includes two groups of mounting plates 601, and the rocker arm 3 is provided with a plurality of connecting holes 402. A mounting hole 303 is provided at the top, and the top of the rocker arm 3 is inserted between two groups of mounting plates 601. Mounting bolts 602 are screwed on the two groups of mounting plates 601, and the mounting bolts 602 pass through the mounting holes 303. The buffer mechanism 5 includes a piston rod 501, a cylinder barrel 502 is sleeved on one side of the piston rod 501, a connecting rod 503 is provided on the side of the piston rod 501 away from the cylinder barrel 502, and a cylinder bottom 504 is provided on the side of the cylinder barrel 502 away from the piston rod 501. Joint bearings 505 are provided on the sides of the cylinder bottom 504 and the connecting rod 503 away from each other, and two groups of anti-wear plates 10 are provided at the bottom of the left sliding tube 1 and the right sliding tube 2.

[0029] Based on the above features, the working principle of this embodiment is: when the helicopter lands, the piston rod 501 is compressed by the impact load, and the oil chamber set in the inner cavity of the cylinder 502 is provided with damping oil. At this time, the built-in air chamber and the damping oil work together to produce a certain damping force to dissipate the impact energy and reduce the impact of the impact load on the helicopter; when the impact load is less than the thrust of the buffer mechanism 5, the buffer mechanism 5 is extended, and the helicopter landing gear is lifted to the parking height. The rocker arm 3 is the main load-bearing component of the landing gear. The upper end is connected to the crossbeam frame 7 by bolts, the middle is connected to the buffer mechanism 5 by two sets of connecting plates 401, and the lower end is connected to the left sliding tube 1 by bolts, through which the ground load is transmitted to the buffer mechanism 5.

[0030] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A skid-type landing gear with a buffer, comprising a left slide tube (1) and a right slide tube (2), characterized in that: Two groups of rocker arms (3) are provided on the side where the left slide tube (1) and the right slide tube (2) are close to each other, a connecting mechanism (4) is provided in the middle of the four groups of rocker arms (3), a buffer mechanism (5) is provided above the four groups of connecting mechanisms (4), a mounting mechanism (6) is provided on the top of the four groups of rocker arms (3), a crossbeam frame (7) is provided on the top of the two groups of mounting mechanisms (6) on the left side and the two groups of mounting mechanisms (6) on the right side, and two fixing interfaces (8) are provided on the top of the two groups of crossbeam frames (7), and a tractor wheel interface (9) is provided on one side of the left slide tube (1) and the right slide tube (2).

2. A skid-type landing gear with a buffer according to claim 1, characterized in that: A slide tube groove (301) adapted to the left slide tube (1) is provided below the rocker arm (3), and four groups of slide tube holes (302) are provided in the slide tube groove (301).

3. The skid-type landing gear with a buffer according to claim 1, characterized in that: The connection mechanism (4) comprises two groups of connection plates (401), and connection holes (402) are provided on both groups of connection plates (401).

4. The skid-type landing gear with a buffer according to claim 1, characterized in that: The mounting mechanism (6) comprises two groups of mounting plates (601), a mounting hole (303) is provided at the top of the rocker arm (3), the top of the rocker arm (3) is inserted between the two groups of mounting plates (601), mounting bolts (602) are screwed on the two groups of mounting plates (601), and the mounting bolts (602) pass through the mounting holes (303).

5. The skid-type landing gear with a buffer according to claim 1, characterized in that: The buffer mechanism (5) comprises a piston rod (501), a cylinder barrel (502) is sleeved on one side of the piston rod (501), a connecting rod (503) is provided on the side of the piston rod (501) away from the cylinder barrel (502), a cylinder bottom (504) is provided on the side of the cylinder barrel (502) away from the piston rod (501), and joint bearings (505) are provided on the sides of the cylinder bottom (504) and the connecting rod (503) away from each other.

6. The skid-type landing gear with a buffer according to claim 1, characterized in that: Two groups of anti-wear plates (10) are provided at the bottom of the left sliding tube (1) and the bottom of the right sliding tube (2).

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