Anti-skid device for helicopter skid undercarriage to take off and land in ice and snow environment

Abstract

The utility model discloses an ice and snow environment take-off and landing antiskid device for a skid landing gear of a helicopter, which relates to the technical field of skid landing gears of helicopters and comprises a snow palm plate, a friction plate and a plurality of hoops which are arranged on the bottom surface of the skid landing gear, and the friction plate is mounted on the bottom surface of the snow palm plate; the plurality of hoops are clamped on a skid rod of the skid undercarriage and are connected with the friction plate; the snow sole plate comprises a first snow sole plate body and a second snow sole plate body, and the top face of the first snow sole plate body is concaved inwards to form a plurality of long-strip-shaped grooves. The second snow sole plate body is in an isosceles trapezoid shape, the second snow sole plate body is arranged at the front end of the first snow sole plate body, and the second snow sole plate body and the first snow sole plate body are of an integrally-formed connecting structure. The device can greatly increase the friction force between the undercarriage and the ice and snow ground, can be completely compatible with the helicopter undercarriage, can be quickly mounted and dismounted, and can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of helicopter skid landing gears, in particular to an anti-skid device for taking off and landing of helicopter skid landing gears in an ice and snow environment. Background Art

[0002] Helicopters are widely used in ground reconnaissance, fire strike, medical rescue, disaster relief, geological survey, power line inspection, etc. There are many types of landing gear structures, usually wheeled and skid-type.

[0003] The skid landing gear is generally composed of a bow beam and a skid bar, with simple structure, light weight, easy maintenance, and low cost. It mainly relies on the elastic deformation of the structure to absorb landing energy. It has great advantages in the civil field where the aircraft has a slow speed, light takeoff weight, easy to secure site, and weak logistics.

[0004] However, when completing take-off and landing operations in an icy and snowy environment or on soft ground, the landing gear often sinks into the soft ground due to the pressure on the snow and soft ground, thus affecting the lifting operation.

[0005] Therefore, those skilled in the art provide an anti-skid device for take-off and landing of a helicopter skid landing gear in an icy and snowy environment to solve the problems raised in the above-mentioned background technology. Utility Model Content

[0006] The utility model provides an anti-skid device for taking off and landing in an icy and snowy environment for a helicopter skid landing gear, which can greatly increase the friction between the landing gear and the icy and snowy ground, is fully compatible with the helicopter landing gear, can be quickly installed and disassembled, and can be reused.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model discloses an anti-skid device for taking off and landing on a helicopter skid landing gear in an ice and snow environment, comprising:

[0009] A snow plate provided on the bottom surface of the ski landing gear;

[0010] A friction plate, wherein the friction plate is mounted on the bottom surface of the snow palm plate;

[0011] A plurality of clamps are clamped on the skid rod of the skid landing gear and connected with the friction plate.

[0012] Furthermore, the snow palm plate comprises:

[0013] A first snow palm board body, wherein the top surface of the first snow palm board body is inwardly recessed to form a plurality of long strip-shaped grooves;

[0014] A second snow palm board body, wherein the second snow palm board body is in an isosceles trapezoidal shape, the second snow palm board body is arranged at the front end of the first snow palm board body, and the second snow palm board body and the first snow palm board body are an integrally formed connection structure;

[0015] The first snow palm board body and the second snow palm board body are symmetrically provided with a plurality of first through holes along the axis of the entire length direction thereof.

[0016] Furthermore, the middle parts of the top surfaces of the first snow palm board body and the second snow palm board body protrude outward to form a protrusion, and the top surfaces of the protrusion are recessed inward to form an arc groove, and the arc groove is arranged along the length direction of the first snow palm board body and the second snow palm board body, and the arc groove is in contact with the ski rod.

[0017] Furthermore, the position of the protrusion close to the arc groove is recessed inward to form a plurality of groups of second grooves, and the first through hole is opened at the bottom of the second groove.

[0018] Furthermore, the bottom surfaces of the first snow palm board body and the second snow palm board body are provided with a plurality of anti-slip grooves.

[0019] Furthermore, the front and rear end surfaces of the friction plate protrude outwards to form a plurality of connection protrusions, and the plurality of connection protrusions are connected to corresponding clamps via fastening bolts, and the fastening bolts pass through corresponding first through holes.

[0020] Furthermore, a plurality of anti-slip protrusions are provided in the middle of the top surface of the friction plate and along the length direction of the sliding rod.

[0021] Furthermore, a first groove is formed on the plurality of connecting protrusions, the bottom of the first groove is recessed inward to form a second through hole, the fastening bolt passes through the corresponding second through hole, and a positioning sleeve is provided between the nut at the end of the fastening bolt and the bottom of the first groove.

[0022] Furthermore, the clamp comprises:

[0023] An arc-shaped portion, wherein the arc-shaped portion can be closely attached to the slide rod;

[0024] Two vertical parts, the top ends of the two vertical parts are respectively connected to the two ends of the arc-shaped part;

[0025] Two horizontal parts, the two horizontal parts are respectively connected to the two ends of the vertical part and can be respectively embedded in the corresponding second grooves, a third through hole is opened in the middle of the two horizontal parts, the other end of the fastening bolt passes through the corresponding third through hole, and the horizontal part is pressed into the second groove by the hexagonal flange locking nut.

[0026] Furthermore, the middle parts of the front and rear side surfaces of the arc-shaped portion protrude outward to form a positioning protrusion, and a shock-absorbing pad is arranged inside the arc-shaped portion. The front and rear ends of the shock-absorbing pad have an edging extending upward, and the edging covers the front and rear side surfaces of the arc-shaped portion. A slot is provided in the middle part of the edging near the positioning protrusion, and the positioning protrusion engages with the slot.

[0027] In the above technical scheme, the utility model provides a helicopter skid landing anti-skid device for taking off and landing in an ice and snow environment, which has the following beneficial effects: the application increases the landing area and friction between the skid landing gear and the bottom surface of ice and snow or soft ground through the snow palm plate, which can reduce the pressure on the snow and soft ground, prevent the landing gear from sinking into the soft ground, and further increase the friction between the skid landing gear and the bottom surface of ice and snow through the friction plate, so that the helicopter can smoothly take off and land in an ice and snow environment and soft ground. The snow palm plate and the friction plate are structures that can be quickly installed and disassembled from the skid rod and can be reused; the installation tools are fully compatible with the skid landing gear, which provides great convenience for ground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0029] Figure 1 A schematic structural diagram of an anti-skid device for taking off and landing in an ice and snow environment for a helicopter skid landing gear provided by an embodiment of the utility model;

[0030] Figure 2 for Figure 1 A top view of

[0031] Figure 3 for Figure 1 Structural diagram of the connection between the middle skid bar and the snow palm plate, friction plate and clamp;

[0032] Figure 4 for Figure 3 Bottom view of

[0033] Figure 5 for Figure 3 A top view of

[0034] Figure 6 for Figure 3 Top view of the mid-snow palm plate;

[0035] Figure 7 for Figure 6 Side view of

[0036] Figure 8 for Figure 7 Side view of

[0037] Fig. 9 for Figure 3 Schematic diagram of the structure of the middle clamp;

[0038] Fig.10 for Fig. 9 A top view of

[0039] Fig.11 for Fig. 9 A cross-sectional view of

[0040] Fig.12 for Figure 3 Front view of the connection structure between the middle skid bar, the snow palm plate, the friction plate and the clamp;

[0041] Fig.13 for Fig.12 A cross-sectional view of

[0042] Fig.14 for Fig.13 Schematic diagram of the enlarged structure of part A in the middle.

[0043] Description of reference numerals:

[0044] 10. Skid landing gear; 11. Skid bar;

[0045] 20. Snow palm plate; 21. First snow palm plate body; 22. Long strip groove; 23. Second snow palm plate body; 24. First through hole; 25. Protrusion; 26. Arc groove; 27. Second groove; 28. Anti-slip pattern;

[0046] 30. friction plate; 31. connecting protrusion; 32. fastening bolt; 33. anti-skid protrusion; 34. first groove; 35. second through hole; 36. nut; 37. positioning sleeve; 38. hexagonal flange locking nut;

[0047] 40. Clamp; 41. Arc-shaped portion; 42. Vertical portion; 43. Horizontal portion; 44. Third through hole; 45. Positioning protrusion; 46. Shock-absorbing pad; 47. Edge binding; 48. Slot. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] See also Figure 1-5 As shown;

[0050] The utility model is provided with an anti-skid device for helicopter skid landing gear in an ice and snow environment, comprising:

[0051] A snow palm plate 20 provided on the bottom surface of the ski landing gear 10;

[0052] A friction plate 30, wherein the friction plate 30 is mounted on the bottom surface of the snow palm plate 20;

[0053] A plurality of clamps 40 are clamped on the skid rod 11 of the skid landing gear 10 and connected to the friction plate 30. The clamps 40 are completely fitted with the skid rod 11 and can be quickly fastened by tightening bolts. The clamps 40 are quickly disassembled and have reliable connection.

[0054] The present application increases the landing area and friction between the skid landing gear 10 and the bottom surface of ice and snow or soft ground through the snow palm plate 20, which can reduce the pressure on the snow and soft ground, prevent the landing gear from sinking into the soft ground, and further increase the friction between the skid landing gear 10 and the ice and snow ground through the friction plate 30, so that the helicopter can smoothly take off and land in the ice and snow environment and soft ground. The snow palm plate 20 and the friction plate 30 and the skid rod 11 are structures that can be quickly installed and disassembled, and can be reused; the installation tools are fully compatible with the skid landing gear 10, providing great convenience for ground operations.

[0055] The snow palm plate 20 is made of ultra-high molecular weight polyethylene, which has the characteristics of ultra-high toughness at extremely low temperatures, low material density, light weight, and good wear resistance.

[0056] The snow palm plate 20 can reduce the unevenness of the ice and snow ground during takeoff and landing, and reduce the vibration of the helicopter when starting and stopping.

[0057] See also Figure 1-8 , as shown in 12;

[0058] The snow palm plate 20 comprises:

[0059] A first snow palm board body 21, the top surface of which is inwardly concave to form a plurality of long strip grooves 22, and the plurality of long strip grooves 22 can be elastically deformed to adapt to the squeezing of snow or mud;

[0060] The second snow palm board body 23 is in an isosceles trapezoidal shape. The second snow palm board body 23 is arranged at the front end of the first snow palm board body 21, and the second snow palm board body 23 and the first snow palm board body 21 are an integrally formed connection structure. The outer edges of the first snow palm board 21 and the second snow palm board 23 are provided with a reinforcement edge, and cooperate with a plurality of elastically deformable long strip grooves, which can eliminate the influence of snow on the landing gear in the parking state. When the helicopter is in the air, the snow can fall smoothly from the long strip groove 22;

[0061] The first snow palm board body 21 and the second snow palm board body 23 are provided with a plurality of first through holes 24 symmetrically along the axis of the entire length direction thereof.

[0062] The middle parts of the top surfaces of the first snow palm board body 21 and the second snow palm board body 23 protrude outward to form a protrusion 25, and the top surfaces of the protrusion 25 are recessed inward to form an arc groove 26. The arc groove 26 is arranged along the length direction of the first snow palm board body 21 and the second snow palm board body 23, and the arc groove 26 is in contact with the ski rod 11.

[0063] The position of the protrusion 25 near the arc groove 26 is inwardly recessed to form a plurality of second grooves 27 , and the first through hole 24 is opened at the groove bottom of the second groove 27 .

[0064] The bottom surfaces of the first snow palm plate body 21 and the second snow palm plate body 23 are provided with a plurality of anti-skid grooves 28, which can increase the friction between the ski landing gear 10 and the icy or soft ground.

[0065] See also Figure 1-4 , as shown in 13-14;

[0066] The front and rear end surfaces of the friction plate 30 protrude outward to form a plurality of connection protrusions 31 . The plurality of connection protrusions 31 are connected to corresponding clamps 40 via fastening bolts 32 . The fastening bolts 32 pass through corresponding first through holes 24 .

[0067] A plurality of anti-skid protrusions 33 are provided in the middle of the top surface of the friction plate 30 and along the length direction of the skid rod 11. The plurality of anti-skid protrusions 33 can greatly increase the friction between the skid landing gear 10 and the icy and snowy ground, so that the helicopter can be fully installed to take off and land on the ground in an icy and snowy environment.

[0068] A first groove 34 is formed on the plurality of connecting protrusions 31 , the bottom of the first groove 34 is recessed inward to form a second through hole 35 , the fastening bolt 32 passes through the corresponding second through hole 35 , and a positioning sleeve 37 is provided between the nut 36 at the end of the fastening bolt 32 and the bottom of the first groove 34 .

[0069] The friction plate 30, the clamp 40, the snow palm plate 20 and the skid rod 11 are connected by fastening bolts 32, and the whole can be disassembled and reused.

[0070] See also Figure 1-5 , as shown in 9-11;

[0071] The clamp 40 comprises:

[0072] An arc-shaped portion 41, wherein the arc-shaped portion 41 can be closely attached to the slide rod 11;

[0073] Two vertical portions 42, the top ends of the two vertical portions 42 are respectively connected to the two ends of the arc portion 41;

[0074] Two horizontal parts 43, the two horizontal parts 43 are respectively connected to the two ends of the vertical part 42 and can be respectively embedded in the corresponding second grooves 27, a third through hole 44 is opened in the middle of the two horizontal parts 43, the other end of the fastening bolt 32 passes through the corresponding third through hole 44, and the horizontal part 43 is pressed into the second groove 27 by the hexagonal flange locking nut 38, and the hexagonal flange locking nut 38 is a nylon insert of the beacon HB5960.

[0075] The nuts 36 and the hexagonal flange locking nuts 38 at both ends of the fastening bolt 32 are respectively embedded in the corresponding first groove 36 and second groove 27, so that the arc portion 41 and the vertical portion 42 of the clamp 40 are tightly attached to the sliding rod 11, thereby making the overall connection more stable.

[0076] The middle parts of the front and rear side surfaces of the arc-shaped portion 41 protrude outward to form a positioning protrusion 45, and a shock-absorbing pad 46 is arranged inside the arc-shaped portion 41. The front and rear ends of the shock-absorbing pad 46 extend upward with a edging 47, and the edging 47 covers the front and rear side surfaces of the arc-shaped portion 41. A slot 48 is provided in the middle part of the edging 47 near the positioning protrusion 45, and the positioning protrusion 45 is engaged with the slot 48. The arrangement of the shock-absorbing pad 46 and the edging 47 can prevent other components on the slide rod 11 from contacting with the arc-shaped portion 41, which would cause damage due to friction during use.

[0077] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A helicopter skid landing gear anti-skid device for taking off and landing in snowy environment, characterized in that: include: A snow palm plate (20) arranged on the bottom surface of the ski landing gear (10); A friction plate (30), wherein the friction plate (30) is mounted on the bottom surface of the snow palm plate (20); A plurality of clamps (40) are clamped on a skid rod (11) of a skid landing gear (10) and connected to a friction plate (30).

2. The anti-skid device for helicopter skid landing gear taking off and landing in snowy environment according to claim 1, characterized in that: The snow palm plate (20) comprises: A first snow palm board body (21), wherein the top surface of the first snow palm board body (21) is inwardly recessed to form a plurality of long strip-shaped grooves (22); A second snow palm board body (23), wherein the second snow palm board body (23) is in an isosceles trapezoidal shape, the second snow palm board body (23) is arranged at the front end of the first snow palm board body (21), and the second snow palm board body (23) and the first snow palm board body (21) are an integrally formed connection structure; The first snow palm board body (21) and the second snow palm board body (23) are provided with a plurality of groups of first through holes (24) symmetrically arranged along the axis in the overall length direction thereof.

3. The anti-skid device for helicopter skid landing gear in snowy environment according to claim 2, characterized in that: The middle parts of the top surfaces of the first snow palm board body (21) and the second snow palm board body (23) protrude outward to form a protrusion (25), and the top surfaces of the protrusions (25) are recessed inward to form an arcuate groove (26). The arcuate groove (26) is arranged along the length direction of the first snow palm board body (21) and the second snow palm board body (23), and the arcuate groove (26) is in contact with the ski rod (11).

4. The anti-skid device for helicopter skid landing gear in ice and snow environment according to claim 3, characterized in that: The position of the protrusion (25) close to the arc-shaped groove (26) is inwardly recessed to form a plurality of groups of second grooves (27), and the first through hole (24) is opened at the groove bottom of the second groove (27).

5. The anti-skid device for helicopter skid landing gear in snowy environment according to claim 4, characterized in that: The bottom surfaces of the first snow palm plate body (21) and the second snow palm plate body (23) are provided with a plurality of anti-slip grooves (28).

6. The anti-skid device for helicopter skid landing gear in snowy environment according to claim 2, characterized in that: The front and rear end surfaces of the friction plate (30) protrude outwards to form a plurality of connection protrusions (31), and the plurality of connection protrusions (31) are connected to corresponding clamps (40) via fastening bolts (32), and the fastening bolts (32) pass through corresponding first through holes (24).

7. The anti-skid device for helicopter skid landing gear in ice and snow environment according to claim 6, characterized in that: A plurality of anti-slip protrusions (33) are arranged in the middle of the top surface of the friction plate (30) and along the length direction of the sliding rod (11).

8. The anti-skid device for helicopter skid landing gear in ice and snow environment according to claim 7, characterized in that: A first groove (34) is formed on the plurality of connecting protrusions (31); the bottom of the first groove (34) is recessed inward to form a second through hole (35); the fastening bolt (32) passes through the corresponding second through hole (35); and a positioning sleeve (37) is provided between the nut (36) at the end of the fastening bolt (32) and the bottom of the first groove (34).

9. The anti-skid device for helicopter skid landing gear taking off and landing in snowy environment according to claim 8, characterized in that: The clamp (40) comprises: An arc-shaped portion (41), wherein the arc-shaped portion (41) can be closely attached to the sliding sled rod (11); Two vertical portions (42), the top ends of the two vertical portions (42) are respectively connected to the two ends of the arc portion (41); Two horizontal parts (43), the two horizontal parts (43) are respectively connected to the two ends of the vertical part (42) and can be respectively embedded in the corresponding second grooves (27), and a third through hole (44) is opened in the middle of the two horizontal parts (43), and the other end of the fastening bolt (32) passes through the corresponding third through hole (44), and the horizontal part (43) is pressed into the second groove (27) by a hexagonal flange locking nut (38).

10. The anti-skid device for helicopter skid landing gear in ice and snow environment according to claim 9, characterized in that: The middle parts of the front and rear side surfaces of the arc-shaped portion (41) protrude outward to form a positioning protrusion (45), and a shock-absorbing pad (46) is arranged inside the arc-shaped portion (41). The front and rear ends of the shock-absorbing pad (46) extend upward to form a rim (47), and the rim (47) covers the front and rear side surfaces of the arc-shaped portion (41). A clamping groove (48) is provided in the middle part of the rim (47) near the positioning protrusion (45), and the positioning protrusion (45) is clamped with the clamping groove (48).

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