Unmanned aerial vehicle fuel tank system and bandage thereof

Abstract

The utility model discloses an unmanned aerial vehicle fuel tank system and a bandage thereof, belongs to the technical field of unmanned aerial vehicles, and aims to solve the problem of low loading and unloading speed of an unmanned aerial vehicle fuel tank. Each bandage is composed of a bandage combination part, a bandage strip and a fuselage combination part, the bandage combination part and the fuselage combination part are located at the two ends of the bandage strip respectively, and the fuselage combination part of each bandage is connected with the mounting lugs of the bearing face and the mounting lugs of the side face respectively. The combination portions of the two bandages are connected through a tightening and loosening device, and the tightening and loosening device is used for tightening or loosening the bandages. In addition, a bandage strip length adjusting device is further arranged on the bandage strip, and the length of the bandage strip is adjusted. The fuel tank is reliable in work, low in cost, simple in structure and capable of being quickly assembled and disassembled, and the assembling and disassembling time is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicles and relates to a fuel tank system for an unmanned aerial vehicle and a fixing device thereof. Background Art

[0002] At present, the scale of China's drone market continues to expand. Fuel-powered drones have the characteristics of strong power, long flight time, and short refueling and take-off time compared to charging. They have begun to play an important role in agriculture, logistics, firefighting, public safety and other fields.

[0003] Drones need regular inspections and maintenance. Due to the large size of the fuel tank, the fuel tank needs to be removed for easy inspection and maintenance. After the inspection and maintenance, the fuel tank needs to be installed and reset. How to quickly install and remove the fuel tank, save time on installation and removal of the fuel tank, and have low cost, simple structure, and reliable operation is a problem that needs to be solved urgently. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a UAV fuel tank system and a strap thereof, which are used for quickly loading and unloading the fuel tank of the UAV.

[0005] The purpose of the utility model is mainly achieved through the following technical solutions.

[0006] The utility model provides a fuel tank strap for an unmanned aerial vehicle, comprising two straps and a tightening and relaxing device. Each strap is composed of a strap joint, a strap strip and a fuselage joint, the strap joint and the fuselage joint are respectively located at the two ends of the strap strip; the fuselage joint of each strap is respectively connected to the mounting ears on the load-bearing surface and the side of the fuselage; the two strap joints are connected by the tightening and relaxing device, and the tightening and relaxing device is used to tighten or relax the strap.

[0007] One strap is attached to the upper part of the fuel tank, and the other strap is attached to the lower part of the fuel tank; when installing the fuel tank, the strap is tightened by tightening and releasing the device to fix the fuel tank to the fuselage; when removing the fuel tank, the strap is loosened by tightening and releasing the device to move the fuselage joint away from the installation ear.

[0008] Furthermore, the fuselage coupling part includes a bending part and a fixing device; the free end of the binding strip is bent to form a bending part, and the bending part is fixed to the binding strip; the width of the binding strip is smaller than the distance between the two mounting ears, the bending part is placed between the two mounting ears, and the fixing device passes through the two mounting ears and the bending part to fix the fuselage coupling part to the fuselage.

[0009] Furthermore, the fixing device of the fuselage joint includes a fixing pin and a quick-release pin; a through hole is provided at the tail end of the pin rod of the fixing pin; the pin rod passes through two mounting ears and a bent portion, and the quick-release pin is inserted into the through hole for fixing.

[0010] Furthermore, the quick release pin is a cotter pin or a pin retaining spring pin.

[0011] Furthermore, a through hole with an internal thread is provided in the two strap joints, and the internal threads of the two strap joints have opposite rotation directions; the tightening and relaxing device is a double-headed stud, and both ends of the double-headed stud respectively cooperate with the internal threads of the two strap joints, and the strap is tightened or loosened by rotating the double-headed stud clockwise or counterclockwise.

[0012] Furthermore, the two binding strap joints are cylindrical or rectangular, and the center line of the internal threaded through hole is perpendicular to the axis of the cylinder or rectangular.

[0013] Furthermore, one strap joint has an internal thread, the other strap joint is a light hole, the tightening and loosening device is a bolt, and the bolt passes through the light hole of the strap joint and extends into the internal thread of the other strap joint; the strap is tightened or loosened by rotating the bolt.

[0014] Furthermore, a strap strip length adjustment device is provided on the strap strip, and the strap strip length adjustment device includes two strap strip connection ends, a strap strip connection base and a strap strip connection cover plate; the two strap strip connection ends are provided with a plurality of strap strip positioning holes; the strap strip connection base is in the shape of a groove, and a cylindrical positioning protrusion is provided at the center position of the bottom of the groove, and threaded holes are respectively provided on the protrusions on both sides of the groove; the strap strip connection cover plate is located at the upper part of the strap strip connection base, and the strap strip connection cover plate is a convex strip matching the groove, and the center of the convex strip has a blind hole corresponding to the cylindrical positioning protrusion, and through holes are provided on both sides of the convex strip at positions corresponding to the threaded holes on the protrusion; the two strap strip connection ends are respectively placed in the grooves, and the two strap strip positioning holes are respectively put on the positioning protrusions, and after the strap strip connection cover plate is covered, it is fixed with bolts.

[0015] Furthermore, the height h of the protruding portion of the cover plate connected to the strap strip and the depth d of the groove of the base connected to the strap strip satisfy the following relationship:

[0016] h+2t>d;

[0017] Wherein, t is the thickness of the strapping strip (12).

[0018] The utility model also provides a UAV fuel tank system, including a fuel tank and the above-mentioned UAV fuel tank strap; the fuel tank has two strap fixing grooves, the strap fixing grooves are located at the place where the fuel tank surface and the strap are attached, and the shape of the strap fixing grooves matches the shape of the strap.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] 1. Use two straps to fix the fuel tank to the fuselage. Use the tightening and loosening device to quickly adjust the distance between the two straps, so that the straps can be tightened and loosened quickly. Use studs to quickly adjust the joints of the two straps at the same time.

[0021] 2. The fuselage joint is formed by bending one end of the strap strip to form a curved portion, which has a simple structure and can be installed and disassembled using a fixing pin and a quick-release pin, which is convenient and fast.

[0022] 3. The length adjustment device of the strap strip is adopted. By misaligning the positioning holes of the two strap strips, the length of the strap strip can be appropriately adjusted, reducing the travel of the stud bolt to tighten and relax the joint of the two straps, thereby speeding up the disassembly and assembly speed.

[0023] 4. Two strap fixing grooves are set on the fuel tank to prevent the strap from sliding on the surface of the fuel tank, making the fuel tank more firmly and reliably fixed.

[0024] 5. It adopts two straps to combine, with simple structure, which can reduce the load of drone.

[0025] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of the strap and the fuel tank provided in the first embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the binding structure provided in Embodiment 1 of the present utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the strap length adjustment device provided in the first embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the structure of the connection ends of two strapping strips provided in the first embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the connection structure of the two strap strip connection ends provided in Example 1 of the utility model.

[0031] Reference numerals:

[0032] 1-strap, 11-strap joint, 12-strap strip, 13-fuselage joint, 131-bending portion, 132-fixing pin, 133-quick release pin, 14-strap strip length adjustment device, 141-strap strip connection end, 142-strap strip positioning hole, 143-strap strip connection base, 144-positioning protrusion, 145-strap strip connection cover plate, 2-fuel tank, 3-tightening and relaxing device. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0034] Embodiment 1

[0035] The drone fuselage is provided with a load-bearing platform for mounting the fuel tank 2, which includes a load-bearing surface and a side surface. The load-bearing surface is placed horizontally, and the side surface is the fuselage part. After the fuel tank 2 is placed on the load-bearing surface, the bottom of the fuel tank 2 contacts the load-bearing surface, and the inner side surface is close to the side surface. A mounting ear is provided at the end of the load-bearing surface away from the fuselage, and a mounting ear is also provided at the part of the fuselage side that contacts the fuel tank 2. The installation positions of the two mounting ears are located in the same vertical plane. Due to the narrow space at the part where the fuel tank 2 is placed, the mounting ear on the side of the fuselage is located lower than the top of the fuel tank 2.

[0036] In order to solve the problem of rapid disassembly and installation of the fuel tank 2 of the drone, the specific embodiment 1 of the utility model discloses a fuel tank strap for the drone, including two straps 1 and a tightening and loosening device 3. The two straps 1 are combined, and the straps 1 are tightened and loosened by the tightening and loosening device 3. Figure 1 , Figure 2 .

[0037] Each strap 1 is composed of a strap joint 11, a strap strip 12 and a fuselage joint 13, and the strap joint 11 and the fuselage joint 13 are respectively located at the two ends of the strap strip 12. The fuselage joint 13 of one strap 1 is connected to the mounting ear on the load-bearing surface, and the fuselage joint 13 of the other strap 1 is connected to the mounting ear on the side. The two strap joints 11 are connected by a tightening and relaxing device 3, and the tightening and relaxing device 3 is used to tighten or relax the strap 1.

[0038] The two straps 1 have the same structure, can be bent, and have different lengths. The straps 1 are made of metal material, and in this embodiment, steel straps are used. One strap 1 is attached to the upper part of the outer side of the fuel tank 2, and the other strap is attached to the lower part of the outer side of the fuel tank 2. Figure 1 ,in particular Figure 2It can be seen that the upper strap 1 not only fits the upper outer side of the fuel tank 2, but also fits the upper inner side of the fuel tank 2. From the perspective of force, the fuselage joint 13 of the upper strap 1 and the fuselage mounting ear are preferably located above the top of the fuel tank 2, but there are other components near and above the top of the fuselage fuel tank 2, and the installation conditions are limited.

[0039] When installing the fuel tank 2, the strap 1 is tightened by the tightening and releasing device 3 to fix the fuel tank 2 to the fuselage; when removing the fuel tank 2, the strap 1 is loosened by the tightening and releasing device 3 to remove the fuselage joint 13 from the connecting seat.

[0040] Exemplarily, one strap joint 11 has an internal thread, the other strap joint is a light hole, the tightening and loosening device 3 is a bolt, and the bolt passes through the light hole of the strap joint 11 and extends into the internal thread of the other strap joint; the strap 1 is tightened or loosened by rotating the bolt.

[0041] Exemplarily, the tightening and relaxing device 3 can adopt a double-headed stud, and both of the two strap joints 11 have internal threads, and the internal threads of the two strap joints 11 rotate in opposite directions; the two ends of the double-headed stud are respectively matched with the internal threads of the two strap joints 11, and the strap 1 is tightened or loosened by rotating the double-headed stud clockwise or counterclockwise. In this way, since it cooperates with the internal threads of the two strap joints 11 at the same time during rotation, the distance between the two strap joints 11 can be quickly adjusted to meet the needs of quick disassembly and assembly.

[0042] The binding band joint 11 can be cylindrical or rectangular, and of course other shapes can also be used. The rectangular binding band joint 11 is more firmly connected to the binding band strip 12, and the through hole is more convenient to process. In addition, for the convenience of processing, the two binding bands are preferably made in the same way.

[0043] When using a steel belt, the steel belt is welded to the cylinder or cuboid, or fixed in other ways. The through hole opened inside is at the center of the cylinder or cuboid, and the center of the through hole is perpendicular to the axis of the cylinder or the center line of the cuboid.

[0044] The fuselage joint part 13 includes a bent portion 131 and a fixing device; the free end of the strap strip 12 is bent to form the bent portion 131, and the bent portion 131 is fixed to the strap strip 12. The width of the strap strip 12 is less than the distance between the two mounting ears. The bent portion 131 is placed between the two mounting ears, and the fixing device passes through the two mounting ears and the bent portion 131 to fix the fuselage joint part 13 on the fuselage.

[0045] For example, the fixing device may be a fixing pin 132 and a quick release pin 133, and a through hole is provided at the tail end of the pin rod of the fixing pin 132. After the pin rod passes through the two mounting ears and the curved portion 131, the quick release pin 133 is inserted into the through hole for fixing. It is best to install a gasket outside the hole of the mounting ear to ensure a firm installation.

[0046] Exemplarily, the quick release pin 133 may be a cotter pin or a pin retaining spring pin.

[0047] In this embodiment, one end of the strap strip 12 is bent to form a bent portion 131, and the structure is simple. The fixing pin 132 and the quick-release pin 133 are used for installation and removal, which is convenient and fast.

[0048] In addition, the fixing device may also be a bolt-nut structure, where the bolt first passes through one mounting ear, then passes through the bent portion 131, and then passes through another mounting ear and is tightened with the screw.

[0049] The tightening and relaxing device 3 uses a double-headed stud to rotate and simultaneously connect the two strap joints 11. Although it can tighten the strap strip 12 relatively quickly, since the bent portion 131 of the fuselage joint 13 is formed by bending the free end of the strap strip 12 and fixing it to the strap strip 12, the length of the strap strip 12 is difficult to estimate. If the two strap joints 11 need to move a relatively large distance during tightening, it will cause the double-headed stud to take more time to tighten and relax.

[0050] In order to load and unload faster, a strap length adjustment device 14 is installed at the appropriate position of the strap 12, see Figure 3 . The strap strip length adjustment device 14 is installed on the outside of the fuel tank 2 for easy adjustment, but it is not limited to the outside. The strap strip length adjustment device 14 is composed of a strap strip connection end 141, a strap strip connection base 143 and a strap strip connection cover plate 145. Both strap strip connection ends 141 are provided with a plurality of strap strip positioning holes 142, and these strap strip positioning holes 142 preferably have the same diameter and equal spacing. The number of positioning holes 142 on each strap strip connection end 141 can be 2-3, and the number should be as small as possible while meeting the adjustment requirements (3 holes are drawn as an example in the attached figure), and the spacing between the positioning holes 142 is set according to actual conditions, see Figure 4 .

[0051] The strap connection base 143 is in the shape of a groove, and a cylindrical positioning protrusion 144 is provided at the center of the bottom of the groove. The positioning protrusion 144 is slightly smaller than the diameter of the strap positioning hole 142. On both sides of the groove are bosses for fixing the strap length adjustment device 14, and threaded holes are respectively provided on the bosses; the strap connection cover plate 145 is located on the upper part of the strap connection base 143, and is in the shape of a convex strip that matches the groove of the strap connection base 143. The center of the convex strip has a blind hole corresponding to the cylindrical positioning protrusion 144, and the diameter of the blind hole is larger than the diameter of the positioning protrusion 144, and the depth is greater than the height of the positioning protrusion 144. Through holes are provided at the positions corresponding to the threaded holes on both sides of the convex strip.

[0052] like Figure 5 As shown, when adjusting the length of the strap, the two strap connection ends 141 are placed in the grooves respectively, and the two strap positioning holes 142 that meet the length requirements are respectively put on the positioning protrusions 144, and then the strap connection cover plate 145 is covered and fixed with bolts.

[0053] The strength of the strap strip 12 is reduced to a certain extent by the cooperation between the strap strip positioning hole 142 and the positioning protrusion 144. To solve this problem, the embodiment requires that the height h of the protruding portion of the strap strip connecting cover plate 145 and the depth d of the groove of the strap strip connecting base 143 satisfy the following relationship:

[0054] h+2t>d;

[0055] Wherein, t is the thickness of the strap strip 12 .

[0056] When this relationship is satisfied, after installation, the protruding portion of the strap strip connecting cover plate 145 will press the two strap strip connecting ends 141 , so that when the strap strip 12 is tightened, not only the strap strip positioning hole 142 is locally stressed, thereby enhancing the strength of the strap strip 12 .

[0057] Embodiment 2

[0058] like Figure 1 As shown, this embodiment provides a drone fuel tank system, which includes a fuel tank 2 and a drone fuel tank strap 1 disclosed in Embodiment 1. The surface of the fuel tank 2 has two strap fixing grooves, which are located at the joint between the surface of the fuel tank 2 and the strap 1. The two strap fixing grooves are respectively located at the two ends of the fuel tank 2 symmetrically to ensure that the fuel tank 2 is evenly stressed.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel tank strap for an unmanned aerial vehicle, characterized in that: It comprises two straps (1) and a tightening and relaxing device (3); Each of the straps (1) is composed of a strap joint portion (11), a strap strip (12) and a fuselage joint portion (13), wherein the strap joint portion (11) and the fuselage joint portion (13) are respectively located at two ends of the strap strip (12); the fuselage joint portion (13) of each strap (1) is respectively connected to the mounting ears on the load-bearing surface and the side of the fuselage; the two strap joint portions (11) are connected via a tightening and relaxing device (3), and the tightening and relaxing device (3) is used to tighten or relax the strap (1); One of the straps (1) is attached to the upper part of the fuel tank (2), and the other strap (1) is attached to the lower part of the fuel tank (2); when installing the fuel tank (2), the strap (1) is tightened by the tightening and relaxing device (3) to fix the fuel tank (2) to the fuselage; when disassembling the fuel tank (2), the tightening and relaxing device (3) loosens the strap (1) to remove the fuselage joint (13) from the installation ear.

2. The UAV fuel tank strap according to claim 1, characterized in that: The fuselage connecting portion (13) comprises a bent portion (131) and a fixing device; the free end of the binding strip (12) is bent to form the bent portion (131), and the bent portion (131) is fixed to the binding strip (12); the width of the binding strip (12) is smaller than the distance between the two mounting ears, the bent portion (131) is placed between the two mounting ears, and the fixing device passes through the two mounting ears and the bent portion (131) to fix the fuselage connecting portion (13) on the fuselage.

3. The UAV fuel tank strap according to claim 2, characterized in that: The fixing device of the fuselage joint (13) comprises a fixing pin (132) and a quick-release pin (133); a through hole is provided at the pin rod tail end of the fixing pin (132); the pin rod passes through two mounting ears and the bent portion (131), and the quick-release pin (133) is inserted into the through hole for fixing.

4. The UAV fuel tank strap according to claim 3, characterized in that: The quick-release pin (133) is a cotter pin or a pin retaining spring pin.

5. The UAV fuel tank strap according to claim 2, characterized in that: A through hole with an internal thread is provided in the two strap joints (11), and the internal threads of the two strap joints (11) are rotated in opposite directions; the tightening and relaxing device (3) is a double-headed stud, and the two ends of the double-headed stud are respectively matched with the internal threads of the two strap joints (11), and the strap (1) is tightened or loosened by rotating the double-headed stud clockwise or counterclockwise.

6. The UAV fuel tank strap according to claim 5, characterized in that: The two binding strap joints (11) are cylindrical or rectangular parallelepiped, and the center line of the through hole of the internal thread is perpendicular to the axis of the cylindrical or rectangular parallelepiped.

7. The UAV fuel tank strap according to claim 2, characterized in that: One of the strap joints (11) has an internal thread, and the other strap joint (11) is a light hole. The tightening and loosening device (3) is a bolt. After the bolt passes through the light hole of the strap joint (11), it extends into the internal thread of the other strap joint; by rotating the bolt, the strap (1) is tightened or loosened.

8. The UAV fuel tank strap according to claim 5, characterized in that: A strap length adjustment device (14) is provided on the strap strip (12), and the strap length adjustment device (14) comprises two strap connection ends (141), a strap connection base (143) and a strap connection cover plate (145); the two strap connection ends (141) are each provided with a plurality of strap positioning holes (142); the strap connection base (143) is in the shape of a groove, and a cylindrical positioning protrusion (144) is provided at the center of the bottom of the groove, and threaded holes are respectively provided on the protrusions on both sides of the groove; the strap connection The connecting cover plate (145) is located on the upper part of the binding strip connecting base (143); the binding strip connecting cover plate (145) is a convex strip matched with the groove; the center of the convex strip has a blind hole corresponding to the cylindrical positioning protrusion (144); through holes are arranged on both sides of the convex strip at positions corresponding to the threaded holes on the protrusion; the two binding strip connecting ends (141) are respectively placed in the grooves, and the two binding strip positioning holes (142) are respectively put on the positioning protrusions (144); after covering the binding strip connecting cover plate (145), they are fixed with bolts.

9. The UAV fuel tank strap according to claim 8, characterized in that: The height h of the protruding portion of the strap strip connected to the cover plate (145) and the depth d of the groove of the strap strip connected to the base (143) satisfy the following relationship: h+2t>d; Wherein, t is the thickness of the strapping strip (12).

10. A UAV fuel tank system, characterized in that: It comprises a fuel tank (2) and a fuel tank strap for an unmanned aerial vehicle according to any one of claims 1 to 9; the fuel tank (2) has two strap fixing grooves, the strap fixing grooves are located at the joint between the surface of the fuel tank (2) and the strap (1), and the shape of the strap fixing grooves matches the shape of the strap.

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