Universal helicopter traction device

Abstract

The utility model provides a universal helicopter traction device which comprises a tractor, at least three main traction wheels are arranged at the bottom of the tractor, and a main traction rod is fixed on the tractor; the number of the inclined traction rods is two, and the two inclined traction rods are symmetrically and rotationally connected to the surface of the middle of the main traction rod; the mounting rod is rotationally connected with the tail end of the inclined traction rod, an auxiliary traction rod perpendicular to the mounting rod is fixed to the bottom of the mounting rod, and two auxiliary traction wheels capable of rotating are fixed to the bottom of the auxiliary traction rod; the traction limiting assembly is arranged at the end of the fixing rod, the traction limiting assembly comprises a bearing part and a winding part capable of fixing the helicopter skid, and the winding part fixes the helicopter skid through a self-centering bandage. Through the self-centering traction limiting assembly, connection between the helicopter skid and the traction device is easier, and the helicopter skid of different sizes can be fixed.

Description

Technical Field

[0001] The utility model relates to a universal helicopter traction device. Background Art

[0002] The width and diameter of the skids produced by various manufacturers and the skids installed on unmanned helicopters are also different, and the corresponding traction devices are also different in specifications and cannot be universal. When there are multiple types of skid-type helicopters at the same time, it is desirable to have a universal traction device that can be used to tow skid-type helicopters of different specifications within a certain range.

[0003] Therefore, a universal helicopter traction device is provided to address the above problems. Utility Model Content

[0004] The utility model provides a universal helicopter traction device in order to solve the problem that the traditional traction device cannot adapt to skids of different sizes.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a universal helicopter traction device, comprising a tractor, at least three main traction wheels are arranged at the bottom of the tractor, and a main traction rod is fixed on the tractor;

[0007] An oblique traction rod, wherein there are two oblique traction rods, and the two oblique traction rods are symmetrically rotatably connected to the middle surface of the main traction rod;

[0008] A mounting rod, wherein the mounting rod is rotatably connected to the end of the oblique traction rod, a secondary traction rod perpendicular to the mounting rod is fixed at the bottom of the mounting rod, and two rotatable secondary traction wheels are fixed at the bottom of the secondary traction rod;

[0009] A traction limiter assembly is provided on the end of a fixing rod, and comprises a bearing portion and a winding portion for fixing the helicopter skid, wherein the winding portion fixes the helicopter skid through a self-centering strap.

[0010] In the technical solution, an expansion controller is provided at the end of the main traction rod, and the expansion controller is composed of two telescopic rods with adjustable lengths. The two ends of the telescopic rods are respectively rotatably connected to the end of the main traction rod and the surface of the oblique traction rod, and the two telescopic rods are symmetrically arranged with each other.

[0011] Furthermore, the telescopic rod includes an upper connecting rod, a connecting rod and a lower connecting rod, a threaded hole is opened at one end of the connecting rod, the internal thread of the threaded hole is connected to one end of the upper connecting rod, the other end of the upper connecting rod is rotatably connected to the main traction rod, the other end of the connecting rod is connected to the lower connecting rod, a rotating disk is fixed on one end portion of the lower connecting rod, the rotating disk is embedded in the rotating cavity on the end portion of the connecting rod, and the other end portion of the lower connecting rod is rotatably connected to the surface of the oblique traction rod.

[0012] Preferably, the bearing portion includes a bearing frame arranged in a vertical direction, a slidable mounting frame is sleeved inside the bearing frame, a plurality of through holes through which pins can pass are provided on the bearing frame and the mounting frame, and several through holes are distributed along the length direction of the bearing frame and the mounting frame, and the winding portion is arranged at the bottom of the mounting frame.

[0013] Furthermore, the winding section includes two symmetrically arranged mounting plates, which are fixed on the surface of the mounting frame. Four limiting rollers are arranged on the mounting plates. The connecting lines of the center points of the four limiting rollers form an isosceles trapezoidal structure, and the two ends of the four limiting rollers are respectively connected to the two mounting plates. The four limiting rollers are provided with straps for fixing the helicopter skid.

[0014] Specifically, four limiting rollers are respectively arranged on both sides of the mounting frame, and the two ends of the strap pass through the two limiting rollers on both sides of the mounting frame respectively. The two sides of the strap are respectively connected to the two sides of the mounting plate, and the strap and the bottom side wall of the mounting plate jointly form a limiting cavity for fixing the helicopter skid.

[0015] A hook is provided at one end of the binding strap, and the hook is hung on a connecting rod between two mounting plates, and the other end of the binding strap is connected to a winding member with a one-way limiting function.

[0016] Furthermore, the winding member wraps around the winding roller, and the winding roller is connected between two mounting plates and rotates on the mounting plates. One end of the winding roller passes through the mounting plates and is connected to the center of the ratchet. The top of the ratchet is overlapped with a pawl that limits its rotation direction. The pawl is rotatably connected to the outer wall of the mounting plate. A limiting column is fixed at the center of the other end face of the ratchet. The limiting column is preferably a regular hexagonal prism structure, and the strap is fixed on the winding roller.

[0017] Preferably, an auxiliary fixing piece for auxiliary fixing of the helicopter skid is arranged inside the mounting frame, and the auxiliary fixing piece is arranged at the upper part of the limiting cavity, and the auxiliary fixing piece assists the binding strap in fixing the helicopter skid.

[0018] Furthermore, the auxiliary fixing member includes a driving part and a pressing part, and the driving part is pushed by the rising helicopter skid to drive the pressing part to press on the surface of the helicopter skid.

[0019] Further, the driving part includes a driving rod arranged in a vertical direction, the driving rod slides in the inner cavity of the guide tube, the guide tube is fixed on the inner wall of the mounting frame, and the pressing part includes two symmetrically arranged first connecting rods, and the first connecting rods are inclined toward a side direction close to the driving rod;

[0020] A transmission rod, both ends of which are rotatably connected to the surface of the driving rod and the surface of the first connecting rod respectively;

[0021] The end of the first connecting rod is connected to one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected to the limiting plate. A fixed shaft is inserted at the connection between the first connecting rod and the second connecting rod, and the fixed shaft is fixed on the inner wall of the mounting frame. The first connecting rod and the second connecting rod rotate around the fixed shaft as the center of the circle.

[0022] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0023] The positive and progressive effects of the utility model are:

[0024] The self-centering traction limiter assembly makes it easier to connect the helicopter skid with the traction device, and can fix helicopter skids of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the load-bearing frame and the mounting frame of the utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of the mounting frame with auxiliary fixings of the utility model;

[0028] Figure 4 For this utility model Figure 1 A local enlarged structural schematic diagram;

[0029] Figure 5 For this utility model Figure 3 A schematic diagram of the local enlarged structure at B;

[0030] Figure 6 It is a structural schematic diagram of the telescopic rod of the utility model.

[0031] Description of Reference Numerals

[0032] 1. Tractor; 11. Main traction wheel;

[0033] 2. Main traction rod; 21. Oblique traction rod;

[0034] 3. Auxiliary fixing member; 31. Driving rod; 32. Guide tube; 33. First connecting rod; 34. Fixed shaft; 35. Second connecting rod; 36. Limiting plate; 37. Transmission rod;

[0035] 4. Install the rod;

[0036] 5. Auxiliary traction rod; 51. Auxiliary traction wheel;

[0037] 6. deployment controller; 61. upper connecting rod; 62. connecting rod; 63. lower connecting rod;

[0038] 7. Carrying frame; 71. Mounting frame; 72. Latch;

[0039] 8. Helicopter skid;

[0040] 9. Winding section; 91. Mounting plate; 92. Winding roller; 93. Limiting roller; 94. Binding belt; 941. Hook; 95. Ratchet; 96. Paw. DETAILED DESCRIPTION

[0041] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0042] like Figures 1 to 6 As shown, a universal helicopter traction device comprises a tractor 1, at least three main traction wheels 11 are arranged at the bottom of the tractor 1, and a main traction rod 2 is fixed on the tractor 1;

[0043] An oblique traction rod 21, wherein there are two oblique traction rods 21, and the two oblique traction rods 21 are symmetrically rotatably connected to the middle surface of the main traction rod 2;

[0044] A mounting rod 4, wherein the mounting rod 4 is rotatably connected to the end of the oblique traction rod 21, and a secondary traction rod 5 perpendicular to the mounting rod 4 is fixed at the bottom thereof, and two rotatable secondary traction wheels 51 are fixed at the bottom of the secondary traction rod 5;

[0045] A traction limit assembly is arranged on the end of the fixing rod, and the traction limit assembly includes a bearing portion and a winding portion 9 that can fix the helicopter skid 8, and the winding portion 9 fixes the helicopter skid 8 through a self-centering strap 94.

[0046] The self-centering traction limit assembly makes it easier to connect the helicopter skid 8 to the traction device, and can fix helicopter skids 8 of different sizes.

[0047] An unfolding controller 6 is provided at the end of the main traction rod 2. The unfolding controller 6 is composed of two telescopic rods with adjustable lengths. The two ends of the telescopic rods are rotatably connected to the end of the main traction rod 2 and the surface of the oblique traction rod 21 respectively, and the two telescopic rods are symmetrically arranged with each other.

[0048] By adjusting the length of the telescopic rod, the angle between the two oblique traction rods 21 is adjusted, thereby facilitating the fixing of helicopter skids 8 of different widths.

[0049] The telescopic rod includes an upper connecting rod 61, a connecting rod 62 and a lower connecting rod 63. A threaded hole is opened at one end of the connecting rod 62. The internal thread of the threaded hole is connected to one end of the upper connecting rod 61. The other end of the upper connecting rod 61 is rotatably connected to the main traction rod 2. The other end of the connecting rod 62 is connected to the lower connecting rod 63. A rotating disk is fixed on one end of the lower connecting rod 63. The rotating disk is embedded in the rotating cavity on the end of the connecting rod 62. The other end of the lower connecting rod 63 is rotatably connected to the surface of the oblique traction rod 21.

[0050] The connecting rod 62 is rotated to make it rotate on the surface of the upper connecting rod 61 , and the threaded engagement pushes the connecting rod 62 to move on the surface of the upper connecting rod 61 , thereby adjusting the length of the telescopic rod and realizing the expansion and contraction of the oblique traction rod 21 .

[0051] The bearing portion includes a bearing frame 7 arranged along the vertical direction, and a slidable mounting frame 71 is sleeved inside the bearing frame 7. Both the bearing frame 7 and the mounting frame 71 are provided with a plurality of through holes through which a pin 72 can pass, and the plurality of through holes are distributed along the length direction of the bearing frame 7 and the mounting frame 71. The winding portion 9 is arranged at the bottom of the mounting frame 71.

[0052] By sliding the mounting frame 71 inside the carrier frame 7 , the height of the reeling portion 9 at the bottom of the mounting frame 71 is adjusted to adapt to helicopter skids 8 of different heights.

[0053] The winding portion 9 includes two symmetrically arranged mounting plates 91, which are fixed to the surface of the mounting frame 71. Four limiting rollers 93 are arranged on the mounting plates 91. The connecting lines of the center points of the four limiting rollers 93 form an isosceles trapezoidal structure, and the two ends of the four limiting rollers 93 are respectively connected to the two mounting plates 91. The four limiting rollers 93 are provided with straps 94 for fixing the helicopter skid 8.

[0054] Four limiting rollers 93 are respectively arranged on both sides of the mounting frame 71, and the two ends of the strap 94 pass through the two limiting rollers 93 on both sides of the mounting frame 71 respectively. The two sides of the strap 94 are respectively connected to the two sides of the mounting plate 91, and the strap 94 and the bottom side wall of the mounting plate 91 together form a limiting cavity for fixing the helicopter skid 8.

[0055] A hook 941 is disposed at one end of the binding belt 94 , and the hook 941 is hung on a connecting rod between two mounting plates 91 . The other end of the binding belt 94 is connected to a winding member with a one-way limiting function.

[0056] The winding member wraps the winding roller 92, and the winding roller 92 is connected between two mounting plates 91 and rotates on the mounting plates 91. One end of the winding roller 92 passes through the mounting plates 91 and is connected to the center of the ratchet 95. The top of the ratchet 95 is overlapped with a pawl 96 for limiting its rotation direction. The pawl 96 is rotatably connected to the outer wall of the mounting plate 91. A limiting column is fixed at the center of the other end face of the ratchet 95. The limiting column is preferably a regular hexagonal prism structure. The strap 94 is fixed to the winding roller 92.

[0057] Use the spanner of ratchet 95 to lock the shaft end of the upper limit column at the end of ratchet 95, rotate the winding roller 92, and as the strap 94 gradually shortens, lift the helicopter sled 8 upward, so that it gradually leaves the ground and approaches the mounting frame 71. Since the strap 94 is tightened through the gap between the inner and outer sets of limit rollers 93, the left and right positions of the helicopter sled 8 are limited. Even if the helicopter sled 8 is not directly under the mounting frame 71, under the tension of the strap 94, the helicopter sled 8 can only approach the binding center point of the helicopter sled 8 between the two sets of limit rollers 93, and finally stick tightly to the limit rollers 93. This self-centering feature makes it easier to connect the slide to the traction device; the pawl 96 on the top of the ratchet 95 limits the reversal of the ratchet 95, so that the strap 94 firmly binds the helicopter slide 8 to the mounting frame 71 without loosening. The pawl 96 presses the pawl 96 tightly on the ratchet 95 under the action of gravity, and will not loosen due to bumps and vibrations even during travel, thereby ensuring a firm and safe connection. At the same time, the helicopter slide 8 on the other side is tied to the bottom of the other mounting frame 71 in the same way. At this time, the helicopter slide 8 is completely off the ground and is completely supported by the traction device and the transfer wheel.

[0058] An auxiliary fixing member 3 for auxiliary fixing of the helicopter skid 8 is arranged inside the mounting frame 71 . The auxiliary fixing member 3 is arranged at the upper part of the limiting cavity. The auxiliary fixing member 3 assists the binding strap 94 in fixing the helicopter skid 8 .

[0059] The auxiliary fixing member 3 includes a driving part and a pressing part. The driving part is pushed by the rising helicopter skid 8 to drive the pressing part to press on the surface of the helicopter skid 8 .

[0060] The driving part includes a driving rod 31 arranged vertically, the driving rod 31 slides in the inner cavity of the guide tube 32, the guide tube 32 is fixed on the inner wall of the mounting frame 71, and the pressing part includes two symmetrically arranged first connecting rods 33, the first connecting rods 33 are inclined toward a side close to the driving rod 31;

[0061] A transmission rod 37, both ends of which are rotatably connected to the surface of the driving rod 31 and the surface of the first connecting rod 33;

[0062] The end of the first connecting rod 33 is connected to one end of the second connecting rod 35, and the other end of the second connecting rod 35 is rotatably connected to the limiting plate 36. A fixed shaft 34 is inserted at the connection between the first connecting rod 33 and the second connecting rod 35. The fixed shaft 34 is fixed on the inner wall of the mounting frame 71. The first connecting rod 33 and the second connecting rod 35 rotate around the fixed shaft 34 as the center of the circle.

[0063] When the helicopter sled 8 moves upward, the helicopter sled 8 first pushes the driving rod 31 upward, and the downward-moving driving rod 31 drives the first connecting rod 33 and the second connecting rod 35 to rotate through the transmission rod 37, thereby driving the limit plate 36 to move downward until the limit plate 36 reaches the surface of the helicopter sled 8, achieving three-point fixation.

[0064] The utility model is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the utility model. The protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the utility model, but these changes and modifications are within the protection scope of the utility model.

Claims

1. A universal helicopter traction device, comprising a tractor (1), wherein at least three main traction wheels (11) are arranged at the bottom of the tractor (1), and a main traction rod (2) is fixed on the tractor (1); The oblique traction rod (21) has two oblique traction rods (21), and the two oblique traction rods (21) are symmetrically rotatably connected to the middle surface of the main traction rod (2), characterized in that: A mounting rod (4), the mounting rod (4) being rotatably connected to the end of the oblique traction rod (21), a secondary traction rod (5) perpendicular to the mounting rod (4) being fixed at the bottom, and two rotatable secondary traction wheels (51) being fixed at the bottom of the secondary traction rod (5); A traction limiter assembly is provided on the end of a fixing rod, the traction limiter assembly comprises a bearing portion and a winding portion (9) capable of fixing a helicopter skid (8), the winding portion (9) fixing the helicopter skid (8) via a self-centering strap (94).

2. The universal helicopter traction device according to claim 1, characterized in that: An expansion controller (6) is provided at the end of the main traction rod (2), and the expansion controller (6) is composed of two telescopic rods with adjustable lengths. The two ends of the telescopic rods are respectively rotatably connected to the end of the main traction rod (2) and the surface of the oblique traction rod (21), and the two telescopic rods are symmetrically arranged.

3. The universal helicopter traction device according to claim 2, characterized in that: The telescopic rod comprises an upper connecting rod (61), a connecting rod (62) and a lower connecting rod (63); a threaded hole is provided at one end of the connecting rod (62); the inner thread of the threaded hole is connected to one end of the upper connecting rod (61); the other end of the upper connecting rod (61) is rotatably connected to the main traction rod (2); the other end of the connecting rod (62) is connected to the lower connecting rod (63); a rotating disk is fixed on one end of the lower connecting rod (63); the rotating disk is embedded in a rotating cavity on the end of the connecting rod (62); the other end of the lower connecting rod (63) is rotatably connected to the surface of the oblique traction rod (21).

4. The universal helicopter traction device according to claim 1, characterized in that: The bearing portion comprises a bearing frame (7) arranged in a vertical direction, a slidable mounting frame (71) is sleeved inside the bearing frame (7), a plurality of through holes through which a latch (72) can pass are formed on both the bearing frame (7) and the mounting frame (71), and the plurality of through holes are distributed along the length direction of the bearing frame (7) and the mounting frame (71), and the winding portion (9) is arranged at the bottom of the mounting frame (71).

5. The universal helicopter traction device according to claim 4, characterized in that: The winding section (9) comprises two symmetrically arranged mounting plates (91), wherein the mounting plates (91) are fixed on the surface of the mounting frame (71), and four limiting rollers (93) are arranged on the mounting plates (91), wherein the connecting lines of the center points of the four limiting rollers (93) form an isosceles trapezoidal structure, and the two ends of the four limiting rollers (93) are respectively connected to the two mounting plates (91), and the four limiting rollers (93) are provided with straps (94) for fixing the helicopter skid (8).

6. The universal helicopter traction device according to claim 5, characterized in that: Four limiting rollers (93) are respectively arranged on both sides of the mounting frame (71), and the two ends of the strap (94) pass through the two limiting rollers (93) on both sides of the mounting frame (71), and the two sides of the strap (94) are respectively connected to the two sides of the mounting plate (91), and the bottom side wall of the strap (94) and the mounting plate (91) together form a limiting cavity for fixing the helicopter skid (8).

7. The universal helicopter traction device according to claim 6, characterized in that: A hook (941) is provided at one end of the binding belt (94), and the hook (941) is hung on a connecting rod between two mounting plates (91). The other end of the binding belt (94) is connected to a winding member with a one-way limiting function.

8. The universal helicopter traction device according to claim 7, characterized in that: The winding member wraps around a winding roller (92), and the winding roller (92) is connected between two mounting plates (91) and rotates on the mounting plates (91). One end of the winding roller (92) passes through the mounting plates (91) and is connected to the center of a ratchet (95). A pawl (96) is overlapped on the top of the ratchet (95) to limit its rotation direction. The pawl (96) is rotatably connected to the outer wall of the mounting plate (91). A limiting column is fixed at the center of the other end face of the ratchet (95), and the limiting column is a regular hexagonal prism structure. The binding belt (94) is fixed on the winding roller (92).

9. The universal helicopter traction device according to claim 6, characterized in that: An auxiliary fixing member (3) for assisting in fixing the helicopter skid (8) is arranged inside the mounting frame (71); the auxiliary fixing member (3) is arranged at the upper part of the limiting cavity; the auxiliary fixing member (3) assists the binding belt (94) in fixing the helicopter skid (8); The auxiliary fixing member (3) comprises a driving part and a pressing part, wherein the driving part is pushed by the rising helicopter skid (8), thereby driving the pressing part to press on the surface of the helicopter skid (8).

10. The universal helicopter traction device according to claim 9, characterized in that: The driving part comprises a driving rod (31) arranged vertically, the driving rod (31) slides in the inner cavity of a guide tube (32), the guide tube (32) is fixed on the inner wall of a mounting frame (71), and the pressing part comprises two symmetrically arranged first connecting rods (33), the first connecting rods (33) are inclined toward a side close to the driving rod (31); A transmission rod (37), the two ends of which are rotatably connected to the surface of the driving rod (31) and the surface of the first connecting rod (33) respectively; The end of the first connecting rod (33) is connected to one end of the second connecting rod (35), and the other end of the second connecting rod (35) is rotatably connected to a limiting plate (36). A fixed shaft (34) is inserted at the connection between the first connecting rod (33) and the second connecting rod (35), and the fixed shaft (34) is fixed on the inner wall of the mounting frame (71). The first connecting rod (33) and the second connecting rod (35) rotate around the fixed shaft (34) as a circle center.

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