Digital testing device for damper of small and medium-sized parachute landing unmanned aerial vehicle

Abstract

The utility model relates to a digital testing device for a small and medium-sized parachute landing unmanned aerial vehicle shock absorber, which belongs to the technical field of unmanned aerial vehicle shock absorber testing and comprises a bolt, a first connecting piece, a pressure tester, a second connecting piece and a handheld pressure lever. The bolt is horizontally arranged. The pressure tester is located below the plug pin and used for measuring the pressure of the shock absorber. And the first connecting piece is used for connecting the bolt and the upper end joint of the pressure tester. The handheld pressure lever is located below the pressure tester, and one end of the handheld pressure lever is provided with an arc-shaped groove matched with the diameter of the skid; and a handheld handle is arranged at the other end of the handle. And the second connecting piece is used for connecting the lower end joint of the pressure tester and the handheld pressure lever. One end of the bolt is inserted into the upper end of the shock absorber, the arc-shaped groove of the pressure lever is held by a hand to be supported at the lower end of the outer diameter of the skid, the arc-shaped groove extrudes the skid upwards by pressing the handle downwards, and the pressure of the shock absorber is measured through the pressure tester. The problems that an existing shock absorber measuring method is too long in consumed time and complex in operation process are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of UAV shock absorber testing, and particularly relates to a digital testing device for medium and small-sized parachute UAV shock absorbers. Background Technique

[0002] Currently, UAVs have been widely used in military and civilian fields. With the development of medium and small-sized UAV technologies, in order to enable medium and small-sized parachute UAVs to land in various geographical environments, most medium and small-sized parachute UAVs adopt the method of installing shock absorbers to absorb impact energy. The shock absorbers used in medium and small-sized UAVs with parachute recovery are generally oil-gas mixed shock absorbers. The upper end of the shock absorber is connected to the UAV fuselage through the shock absorber installation upper joint, and the lower end of the shock absorber is connected to the skid in the UAV skid assembly, so that the shock absorber is vertically installed between the fuselage and the skid. When the UAV lands, the skid in the skid assembly touches the ground first, and the shock absorber is used to achieve the landing buffer of the UAV fuselage. Due to the influence of landing environments such as wind and uneven ground, after the landing device of the UAV lands, the shock absorber may be damaged or its pressure may not reach the original pressure. In order to ensure the normal use of the shock absorber again, it is necessary to detect the pressure state of the shock absorber after the UAV lands. Similarly, before the UAV takes off, it is also necessary to detect the pressure of the shock absorber to ensure that the shock absorber pressure is in a normal state, so that the UAV can obtain normal landing buffering.

[0003] For the pressure detection of the oil-gas mixed shock absorbers used in medium and small-sized parachute UAVs, the traditional detection method is to use a pressure gauge to test the pressure of the oil and gas in the shock absorber. Since there may be some gas leakage when the shock absorber is connected to the pressure gauge and the pressure valve of the shock absorber is first opened, after testing the shock absorber, it is necessary to replenish nitrogen to the shock absorber again. This testing method takes 30 minutes to test one shock absorber, which takes too long and the operation is relatively complex.

[0004] Therefore, a device for quickly testing shock absorbers is needed to shorten the detection and testing time. Summary of the Invention

[0005] Technical problems to be solved: In order to avoid the deficiencies of the prior art, the present invention provides a digital testing device for medium and small-sized parachute UAV shock absorbers to achieve fast and convenient pressure detection for the oil-gas mixed shock absorbers of medium and small-sized parachute UAVs.

[0006] The technical solution of the present invention is: A digital testing device for medium and small-sized parachute UAV shock absorbers, including a pin, a first connector, a pressure tester, a second connector, and a hand-held pressure lever;

[0007] The pin is horizontally arranged;

[0008] The first connecting member is perpendicular to the bolt pin. One end of the first connecting member is connected to the bolt pin, and the other end is connected to the upper joint of the pressure tester.

[0009] The pressure tester is located below the bolt pin and is used to measure the pressure of the shock absorber.

[0010] One end of the second connecting member is connected to the lower joint of the pressure tester, and the other end is connected to the hand-held pressure lever. The second connecting member is collinear with the first connecting member.

[0011] The hand-held pressure lever is located below the pressure tester. An arc-shaped groove is provided above one end of the hand-held pressure lever, and the arc-shaped groove matches the diameter of the skid. A handle is provided at the other end of the hand-held pressure lever for hand-holding.

[0012] One end of the bolt pin is horizontally inserted into the upper end of the shock absorber. The arc-shaped groove of the hand-held pressure lever supports the lower end of the outer diameter of the skid. By pressing down the handle, the arc-shaped groove squeezes the skid upward, thereby compressing the shock absorber. At this time, the second connecting member receives a downward pulling force and transmits it to the pressure tester, which is converted into the pressure of the shock absorber by the pressure tester.

[0013] A further technical solution of the present invention is that both the first connecting member and the second connecting member are wire rings and are formed by wire welding.

[0014] A further technical solution of the present invention is that one end of the bolt pin has a square cross-section for insertion into the joint hole at the upper end of the shock absorber; the other end of the bolt pin has an I-beam structure cross-section; a first through hole horizontally penetrating the bolt pin is provided in the middle of the bolt pin for connecting the first connecting member.

[0015] A further technical solution of the present invention is that the pressure tester is a digital display pressure tester. Its upper joint is a fixed end, and its lower joint is a telescopic movable end; through holes are provided in both the upper joint and the lower joint for connecting the first connecting member and the second connecting member respectively.

[0016] A further technical solution of the present invention is that the axis of the arc-shaped groove on the hand-held pressure lever is perpendicular to the hand-held pressure lever. A second through hole penetrating the hand-held pressure lever is provided near the arc-shaped groove of the hand-held pressure lever for connecting the second connecting member.

[0017] A further technical solution of the present invention is that the main body of the hand-held pressure lever is a cylindrical hollow rod, and its material is aluminum alloy.

[0018] A further technical solution of the present invention is that the handle of the hand-held pressure lever is coated with a rubber material.

[0019] A further technical solution of the present invention is that the bolt pin is made of 30CrMnSA high-strength steel and its surface is chrome-plated.

[0020] Beneficial effects

[0021] The beneficial effects of the present invention are as follows: The digital testing device for the shock absorber of a medium and small-sized parachute-dropped unmanned aerial vehicle described in the present invention has a simple structure and is convenient to operate. By inserting a pin into the joint hole at the upper end of the shock absorber, placing the arc-shaped groove of the hand-held pressure lever under the lower end of the outer diameter of the skid, and pressing down the handle of the hand-held pressure lever, the arc-shaped groove of the hand-held pressure lever squeezes the skid upward, compressing the shock absorber. At the same time, the second connecting member receives a downward pulling force from the hand-held pressure lever and transmits it to the telescopic movable end of the pressure tester. Then, the pressure tester converts the pulling force generated by the second connecting member into pressure and displays it, thus completing the pressure detection of the shock absorber. Based on the lever principle, the present invention is convenient to use, does not require the disassembly of the shock absorber to be tested, can be detected in the installed state of the shock absorber, and an operator can independently complete the detection work, greatly reducing the pressure detection time of the shock absorber from 30 minutes by the traditional method to 1 minute.

[0022] The present invention has a simple structure and high reliability. Except for the digital display pressure tester, the rest of the components are mechanical structures without potential electrical failure hazards; between the pin and the fixed end of the digital display pressure tester, and between the telescopic movable end of the digital display pressure tester and the hand-held pressure lever, they are all connected by wire rings without potential thread loosening hazards; after hundreds of tests, the reliability of the testing device of the present invention is verified to be 100%. At the same time, due to the simple structure, it is convenient for maintenance. Regular maintenance only requires replacing the battery of the digital display pressure tester regularly. For shock absorbers with different length specifications, only the first connecting member and the second connecting member need to be replaced, and the length of the wire ring needs to be adjusted.

[0023] The present invention has an attractive appearance. The pin is made of 30CrMnSA high-strength steel and its surface is chrome-plated, effectively preventing the pin from rusting while ensuring strength; the hand-held pressure lever takes into account ergonomic design, the handle conforms to the hand-held arc and is covered with rubber material, improving comfort and having an anti-slip effect at the same time. The main body of the hand-held pressure lever is a hollow cylindrical tube made of aluminum alloy material, which can not only ensure strength but also reduce weight and is convenient to carry. Description of the drawings

[0024] Figure 1 is the overall structural schematic diagram of the device of the present invention;

[0025] Figure 2 is the structural schematic diagram of the pin in the present invention;

[0026] Figure 3 is the structural schematic diagram of the first connecting member in the present invention;

[0027] Figure 4 is the structural schematic diagram of the pressure tester in the present invention;

[0028] Figure 5It is a schematic structural diagram of the second connecting member in the present invention;

[0029] Figure 6 It is a schematic structural diagram of the hand-held pressure lever in the present invention;

[0030] Figure 7 It is a schematic structural diagram of the shock absorber;

[0031] Figure 8 It is a schematic diagram of the usage state of the device of the present invention.

[0032] Explanation of reference numerals: 1. Plug, 11. First through hole, 2. First connecting member, 3. Pressure tester, 31. Upper end joint, 32. Lower end joint, 4. Second connecting member, 5. Hand-held pressure lever, 51. Arc groove, 52. Handle, 53. Second through hole, 6. Shock absorber, 7. Sled, 8. Airplane fuselage, 9. Upper joint for installing shock absorber. Detailed implementation manners

[0033] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0035] Refer to Figure 1 , the digital test device for the shock absorber of a medium and small-sized parachute UAV described in the present invention includes a plug 1, a first connecting member 2, a pressure tester 3, a second connecting member 4, and a hand-held pressure lever 5.

[0036] Refer to Figure 1 , 2 , the plug 1 is rod-shaped, the plug 1 is horizontally arranged, one end of which has a square cross-section and is used for being inserted into the joint hole at the upper end of the shock absorber 6. The other end of the plug 1 has an I-beam structure for easy operation. A first through hole 11 horizontally penetrating the plug 1 is provided near the insertion end of the plug 1 for connecting the first connecting member 2. The plug 1 is made of 30CrMnSA high-strength steel to ensure the use strength requirements, and at the same time, the surface is treated with chromium plating to achieve the effects of beauty and rust prevention.

[0037] Refer to Figure 1 ,3 The first connecting member 2 is perpendicular to the bolt 1. One end of the first connecting member 2 is connected to the first through hole 11 of the bolt 1, and the other end is connected to the upper joint 31 of the pressure tester 3. Specifically, the first connecting member 2 is a wire loop formed by a wire with a diameter of 5 mm. When connecting, one end of the wire passes through the first through hole 11 of the bolt 1, the other end of the wire passes through the through hole on the upper joint 31 of the pressure tester 3, and then the two ends of the wire are butted and fixed by welding to form a wire loop.

[0038] Refer to Figure 1 、 4 In the present invention, the pressure tester 3 is a digital display pressure tester, which belongs to existing mature equipment. The upper joint 31 of the pressure tester 3 is a fixed end, and its lower joint 32 is a telescopic movable end. Through holes are provided on both the upper joint 31 and the lower joint 32 of the pressure tester 3 for connecting the two ends of the tension source. The pressure tester 3 is located below the bolt 1 and is used as the force measuring component in the test device of the present invention to measure the pressure of the shock absorber 6.

[0039] Refer to Figure 1 、 5 One end of the second connecting member 4 is connected to the lower joint 32 of the pressure tester 3, and the other end is connected to the hand-held pressure lever 5. Specifically, the second connecting member 4 is a wire loop formed by a wire with a diameter of 5 mm. When connecting, one end of the wire passes through the through hole on the lower joint 32 of the pressure tester 3, the other end of the wire passes through the second through hole 53 on the hand-held pressure lever 5, and then the two ends of the wire are butted and fixed by welding to form a wire loop. The first connecting member 2, the pressure tester 3, and the second connecting member 4 are located on the same vertical line.

[0040] Refer to Figure 1 、 6 The hand-held pressure lever 5 is located below the pressure tester 3, and the hand-held pressure lever 5 and the bolt 1 are arranged on the same plane. The main body of the hand-held pressure lever 5 is a cylindrical hollow rod. An arc-shaped groove 51 is provided above one end of the hand-held pressure lever 5, and the arc-shaped groove matches the diameter of the skid 7 in the skid assembly. The axis of the arc-shaped groove 51 is perpendicular to the hand-held pressure lever 5. A handle 52 is provided at the other end of the hand-held pressure lever 5 for holding by hand. A second through hole 53 that horizontally penetrates the hand-held pressure lever 5 is provided near the arc-shaped groove 51 of the hand-held pressure lever 5 for connecting the second connecting member 4. The material of the hand-held pressure lever 5 is aluminum alloy. With the hollow design, it can not only meet the requirements of use strength but also has a lightweight effect. For the comfort of holding, the handle 52 of the present invention adopts an arc design, which conforms to the ergonomic principle. At the same time, to prevent hand slippage during use, the present invention wraps the handle 52 with a rubber material, improving the reliability of use.

[0041] Refer to Figure 8, the upper end of the shock absorber 6 is connected to the aircraft fuselage 8 through the shock absorber mounting upper joint 9, the lower end of the shock absorber 6 is connected to the skid 7 in the skid assembly of the UAV, and the shock absorber 6 is vertically installed between the UAV fuselage 8 and the skid 7. When the test device of the present invention is in use, one end of the bolt 1 is horizontally inserted into the joint hole at the upper end of the shock absorber 6, and the arc groove 51 of the hand-held pressure lever 5 is supported on the lower end of the outer diameter of the skid 7. The distance between the bolt 1 and the hand-held pressure lever 5 matches the shock absorber 6. In the initial state, the first connecting member 2, the pressure tester 3, and the second connecting member 4 are on the same vertical line and parallel to the shock absorber 6. By pressing down the handle 52 of the hand-held pressure lever 5, based on the lever principle, the arc groove 51 squeezes the skid 7 upward, thereby compressing the shock absorber 6. At the same time, the second connecting member 4 receives a downward pulling force from the hand-held pressure lever 5 and transmits the pulling force to the pressure tester 3. The internal hardware and software of the digital display pressure tester 3 convert this pulling force into the pressure inside the shock absorber 6 to be measured and display it, and the entire test process is completed.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A digital testing device for a shock absorber of a small or medium-sized parachute drone, comprising a latch (1), a first connecting member (2), a pressure tester (3), a second connecting member (4), and a hand-held pressure lever (5); The latch (1) is arranged horizontally; the first connecting member (2) is perpendicular to the latch (1), one end of which is connected to the latch (1) and the other end is connected to the upper end joint (31) of the pressure tester (3); the pressure tester (3) is located below the latch (1), and the pressure tester (3) is used to measure the pressure of the shock absorber (6); one end of the second connecting member (4) is connected to the lower end joint (32) of the pressure tester (3), and the other end is connected to the hand-held pressure lever (5); the second connecting member (4) and the first connecting member (2) are colinear; the hand-held pressure lever (5) is located below the pressure tester (3); an arc groove (51) is provided above one end of the hand-held pressure lever (5), and the arc groove matches the diameter of the sled (7); the other end of the hand-held pressure lever (5) is provided with a handle (52) for hand-holding; One end of the latch (1) is horizontally inserted into the upper end of the shock absorber (6), and the arc groove (51) of the hand-held pressure lever (5) is supported on the lower end of the outer diameter of the slide (7). By pressing the handle (52) downward, the arc groove (51) presses the slide (7) upward, thereby compressing the shock absorber (6); at this time, the second connecting member (4) is subjected to a downward pulling force and transmitted to the pressure tester (3), and is converted into the pressure of the shock absorber (6) through the pressure tester (3).

2. According to claim 1, a digital testing device for shock absorbers of small and medium-sized parachute drones is characterized by: The first connecting member (2) and the second connecting member (4) are both steel wire rings formed by welding steel wires.

3. According to claim 2, a digital testing device for shock absorbers of small and medium-sized parachute drones is characterized by: The cross section of one end of the latch (1) is square and is used to be inserted into the joint hole at the upper end of the shock absorber (6); the cross section of the other end of the latch (1) is an I-beam structure; a first through hole (11) is provided in the middle of the latch (1) and passes through the latch (1) horizontally and is used to connect the first connecting member (2).

4. According to claim 2, a digital testing device for shock absorbers of small and medium-sized parachute drones is characterized by: The pressure tester (3) is a digital pressure tester, wherein the upper end joint (31) is a fixed end, and the lower end joint (32) is a retractable movable end; the upper end joint (31) and the lower end joint (32) are both provided with through holes, which are respectively used to connect the first connecting member (2) and the second connecting member (4).

5. According to claim 2, a digital testing device for shock absorbers of small and medium-sized parachute drones is characterized by: The axis of the arc groove (51) on the hand-gripped pressure lever (5) is perpendicular to the hand-gripped pressure lever (5), and the hand-gripped pressure lever (5) is provided with a second through hole (53) passing through the hand-gripped pressure lever (5) near the arc groove (51) for connecting to the second connecting member (4).

6. According to claim 1, a digital testing device for shock absorbers of small and medium-sized parachute drones is characterized by: The main body of the hand-held pressure lever (5) is a cylindrical hollow rod, and its material is aluminum alloy.

7. According to claim 1, a digital testing device for shock absorbers of small and medium-sized parachute drones is characterized by: The handle (52) of the hand-held pressure lever (5) is coated with rubber material.

8. The digital testing device for shock absorbers of small and medium-sized parachute drones according to claim 1 is characterized by: The latch (1) is made of 30CrMnSA high-strength steel and has a chrome-plated surface.

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