Mechanical oiling docking structure

Abstract

The application provides a mechanical oiling docking structure, and relates to the technical field of unmanned aerial vehicle oiling structures. The mechanical oiling docking structure comprises an oil inlet assembly and an oil injection assembly. The oil inlet assembly comprises a first valve body, a first valve core and a first elastic member. The first valve body is used for being communicated with an oil tank of an unmanned aerial vehicle. The first valve core is arranged in the first valve body. The first elastic member is arranged on the first valve body and acts on the first valve core. The first elastic member is used for driving the first valve core to open and close the first valve body under pressure. The oil injection assembly can act on the first valve core to open the first valve core and be communicated with the first valve body. The oil injection assembly acts on the first valve core to open the first valve core and be communicated with the inside of the first valve body, so that fuel can enter the oil inlet assembly through the oil injection assembly, thereby achieving fast oiling. Moreover, the electric actuating mechanism in the related art is omitted, and the production and maintenance and replacement costs are effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil filling structure, and in particular to a mechanical oil filling docking structure. BACKGROUND

[0002] Common power sources of unmanned aerial vehicles include electric power and oil power, etc. The unmanned aerial vehicle with oil power has the following advantages: long endurance time, high energy density of gasoline, using gasoline as the power source of the unmanned aerial vehicle can greatly prolong the endurance time or mileage, and is not affected by low temperature; high efficiency, the engine of the oil-powered unmanned aerial vehicle has a high power-to-weight ratio, thereby greatly improving the load capacity of the unmanned aerial vehicle, which means that a larger area can be worked per flight, reducing waste of invalid travel, and the unmanned aerial vehicle can take off immediately after refueling, meeting the needs of high-intensity continuous operation; low cost, the oil-powered unmanned aerial vehicle has low fuel consumption, and the high work efficiency of the oil-powered unmanned aerial vehicle can greatly reduce the operation cost.

[0003] In order to realize the storage of gasoline, an oil tank is arranged on the oil-powered unmanned aerial vehicle, and an oil tank cover is arranged at the oil filling port of the oil tank. When it is necessary to fill gasoline into the oil tank, the oil tank cover needs to be opened manually by hand, and after the oil filling is completed, the oil tank cover needs to be manually covered, so the operation is more troublesome. To solve the above technical problems, in the related art, an electric actuator is arranged on the unmanned aerial vehicle, and the oil tank cover is automatically opened and closed by the electric actuator. However, the use of the electric actuator will increase the production cost of the unmanned aerial vehicle to some extent, and the reliability of the electric actuator will be reduced compared with the oil tank cover installed by the mechanical structure, thereby increasing the maintenance and replacement cost that may occur in the later period. SUMMARY

[0004] The purpose of the present application is to provide a mechanical oil filling docking structure to solve the problem of high production and maintenance and replacement cost caused by the use of an electric actuator for the oil tank of the unmanned aerial vehicle in the related art.

[0005] The mechanical oil filling docking structure provided by the present application adopts the following technical solution:

[0006] A mechanical oil filling docking structure, comprising an oil inlet assembly and an oil injection assembly, the oil inlet assembly comprising a first valve body, a first valve core and a first elastic member, the first valve body being configured to communicate with an oil tank of an unmanned aerial vehicle, the first valve core being arranged in the first valve body, and the first elastic member being arranged on the first valve body and acting on the first valve core, the first elastic member being configured to drive the first valve core to open and close the first valve body under pressure, and the oil injection assembly being configured to act on the first valve core to open the first valve core and communicate with the first valve body.

[0007] By adopting the technical scheme, the first valve core is opened by the oil injection assembly, and the first valve core is in communication with the inside of the first valve body, so that the fuel can enter the oil inlet assembly through the oil injection assembly, thereby achieving fast refueling, and the electric actuator in the related art is omitted, thereby effectively reducing the production and maintenance replacement costs.

[0008] Optionally, the oil injection assembly comprises a second valve body, a second valve core and a second elastic member, the second valve body is capable of being inserted into the first valve body, the second valve core is arranged in the second valve body, the second valve core is capable of abutting against the first valve core, the second elastic member is arranged on the second valve body, and the second elastic member is used to drive the second valve core to press and open / close the second valve body, and the elastic force of the second elastic member is greater than the elastic force of the first elastic member.

[0009] By adopting the technical scheme, when the first spring is completely compressed, the second spring starts to be compressed, so that the fuel cannot leak when the oil injection assembly does not completely enter the oil inlet assembly.

[0010] Optionally, a first through hole is formed on the unmanned aerial vehicle oil tank, a threaded joint is arranged on the unmanned aerial vehicle oil tank, the threaded joint is arranged around the first through hole, an inner wall of the first valve body is provided with an internal thread, and the first valve body is threadedly connected with the threaded joint through the internal thread.

[0011] By adopting the technical scheme, the first valve body is detachably connected at the first through hole of the unmanned aerial vehicle oil tank through the thread, so that the first valve body is convenient to install or disassemble.

[0012] Optionally, a second through hole is formed on the upper portion of the first valve body, the first valve core is used to open / close the second through hole, the oil inlet assembly further comprises a first fixed plate, the first fixed plate is threadedly connected with the inner wall of the first valve body, the first valve core is provided with a first sliding column, the first sliding column is slidably inserted into the first fixed plate, and the two ends of the first elastic member are connected with the first valve core and the first fixed plate.

[0013] By adopting the technical scheme, the first fixed plate is driven to move along the axis direction of the first valve core by rotating the first fixed plate, so that the compression degree of the first elastic member is adjusted, and the elastic force of the first elastic member acting on the first valve core is adjusted.

[0014] Optionally, the oil injection assembly further comprises a rotating cylinder, the rotating cylinder is rotatably sleeved outside the second valve body, the rotating cylinder is used for opening and closing the second valve body, the second valve body is provided with a support plate, the support plate and the inner wall of the second valve body form a containing cavity, the support plate is provided with a third through hole, the second valve core is used for closing the third through hole, the second valve core is provided with an abutting column, the abutting column penetrates through the second valve body and the bottom of the rotating cylinder, and the abutting column is used for abutting with the first valve core.

[0015] By adopting the above technical scheme, the second valve core can be opened and closed to block the third through hole on the support plate, so that the flow of fuel in the second valve body can be controlled.

[0016] Optionally, the oil injection assembly further comprises a second fixed plate, the second fixed plate is threadedly connected with the inner wall of the second valve body, the second valve core is provided with a second sliding column, the second sliding column is slidably inserted into the second fixed plate, and the second elastic member connects the second valve core and the second fixed plate.

[0017] By adopting the above technical scheme, the second fixed plate can be driven to move along the axis direction of the second valve core by rotating the second fixed plate, so as to adjust the compression degree of the second elastic member, and then adjust the elastic force of the second elastic member acting on the second valve core.

[0018] Optionally, the bottom wall of the rotating cylinder is provided with a fourth through hole, the bottom of the second valve body is provided with a fifth through hole, the fourth through hole and the fifth through hole are vertically arranged, and when the rotating cylinder rotates relative to the second valve body, the fourth through hole can coincide with or be staggered with the fifth through hole.

[0019] By adopting the above technical scheme, when the oiling is completed, the fourth through hole of the rotating cylinder is staggered with the fifth through hole, so that the second valve body can be closed, and pollution caused by the dripping of residual fuel can be avoided.

[0020] Optionally, the outer side wall of the second valve body is provided with a clamping ring, the outer side wall of the rotating cylinder is provided with a clamping groove, and the clamping ring and the clamping groove are rotatably connected.

[0021] By adopting the above technical scheme, the rotating cylinder is limited by the clamping ring and the clamping groove, so that the rotating cylinder can only rotate relative to the second valve body.

[0022] Optionally, the oil injection assembly further comprises a rotating driving member, the rotating driving member comprises a worm gear, a worm, a gear and a rack, the rotating cylinder is fixedly connected with the worm gear, the worm is rotatably connected with the clamping ring, the worm is engaged with the worm gear, the gear is fixedly connected with the worm, the rack is slidably arranged on the clamping ring, the rack is engaged with the gear, and the lower end of the rack can abut against the oil tank of the unmanned aerial vehicle.

[0023] By adopting the technical scheme, when the oil injection assembly is docked with the oil inlet assembly, the lower end of the rack can abut against the oil tank of the unmanned aerial vehicle, so that the rotating cylinder is driven to rotate relative to the second valve body by the rotating driving member.

[0024] Optionally, the rotating driving member further comprises a support frame and a third elastic member, the support frame is fixedly arranged on the collar, the worm is rotationally connected with the support frame, the support frame is provided with a first guide sleeve, the rack is slidably arranged in the first guide sleeve, and the two ends of the third elastic member are connected with the support frame and the rack respectively, and the third elastic member is used for providing elastic force for pushing the rack to move downward relative to the collar.

[0025] By adopting the technical scheme, when the oil injection assembly is separated from the oil inlet assembly, the third elastic member can drive the rack to move downward relative to the collar for resetting.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The oil injection assembly acts on the first valve core and opens the first valve core to communicate with the inside of the first valve body, so that the fuel can enter the oil inlet assembly through the oil injection assembly, thereby achieving fast refueling, and the electric actuator in the related art is omitted, thereby effectively reducing the production and maintenance and replacement costs.

[0028] 2. Since the elastic force of the second elastic member is greater than that of the first elastic member, when the second valve body enters the first valve body and the first spring is completely compressed, the second spring begins to compress, so that the fuel will not leak when the oil injection assembly is not completely inserted into the oil inlet assembly.

[0029] 3. After refueling is completed, the fourth through hole and the fifth through hole of the rotating cylinder are staggered, so that the second valve body can be closed to avoid pollution caused by the dripping of residual fuel. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the present application;

[0031] Figure 2 is a cross-sectional schematic view of the present application;

[0032] Figure 3 is a schematic view of the present application after the second valve core abuts against the first valve core;

[0033] Figure 4 is a schematic view of the present application after the fourth through hole and the fifth through hole coincide.

[0034] In the drawings,

[0035] 10, oil inlet assembly; 11, first valve body; 111, second through hole; 12, first valve core; 121, first sliding column; 13, first elastic member; 131, first spring; 14, first fixed plate;

[0036] 20, oil injection assembly; 21, second valve body; 211, support plate; 2111, third through hole; 212, accommodating cavity; 213, fifth through hole; 214, clamping ring;

[0037] 22, second valve core; 221, abutting column; 222, second sliding column;

[0038] 23, second elastic member; 231, second spring;

[0039] 24, rotating cylinder; 241, fourth through hole; 242, clamping groove; 25, second fixed plate;

[0040] 30, oil tank; 31, first through hole; 32, threaded joint;

[0041] 40, rotary driving member; 41, worm gear; 42, worm; 43, gear; 44, rack; 441, limiting plate; 442, anti-dropping plate; 45, support frame; 451, first guide sleeve; 452, second guide sleeve; 46, third elastic member; 461, third spring. DETAILED DESCRIPTION

[0042] The following will be described in detail below with reference to the accompanying drawings Figure 1 - the accompanying drawings Figure 4 , the present application will be further described in detail.

[0043] The embodiment of the present application discloses a mechanical oiling docking structure.

[0044] Embodiment 1

[0045] Reference Figure 1 and Figure 2 , a mechanical oiling docking structure, comprising an oil inlet assembly 10 and an oil injection assembly 20, the specific mechanism of the oil inlet assembly 10 is as follows: the oil inlet assembly 10 comprises a first valve body 11, a first valve core 12, a first elastic member 13 and a first fixed plate 14, the first valve body 11 is in communication with a drone oil tank 30, more specifically, the first through hole 31 is formed on the drone oil tank 30, the threaded joint 32 is arranged on the drone oil tank 30, the threaded joint 32 surrounds the first through hole 31, the inner side wall of the first valve body 11 is provided with internal threads, and the first valve body 11 is screwed with the threaded joint 32 through the internal threads. The drone oil tank 30 receives fuel through the first through hole 31, and the first valve body 11 is detachably connected above the first through hole 31 through the threads, so that the first valve body 11 is convenient to install or disassemble.

[0046] The first valve core 12 is arranged in the first valve body 11, and the first elastic member 13 is arranged on the first valve body 11 and acts on the first valve core 12. The specific connection relationship among the first valve core 12, the first elastic member 13 and the first valve body 11 is as follows: the first elastic member 13 can be a first spring 131, the first fixed plate 14 is threadedly connected with the inner wall of the first valve body 11, the first valve core 12 is provided with a first sliding column 121, the first sliding column 121 is slidingly inserted into the first fixed plate 14, the first spring 131 is sleeved on the first sliding column 121, and the two ends of the first spring 131 abut against the first valve core 12 and the first fixed plate 14. Since the first fixed plate 14 is threadedly connected with the inner wall of the first valve body 11, the first fixed plate 14 can be driven to move along the axis direction of the first valve core 12 by rotating the first fixed plate 14, so as to adjust the compression degree of the first spring 131, and further adjust the elastic force of the first spring 131 acting on the first valve core 12.

[0047] The first elastic member 13 is used to drive the first valve core 12 to open and close the plugging of the first valve body 11. More specifically, the upper portion of the first valve body 11 is provided with a second through hole 111, and the first valve core 12 is used to open and close the plugging of the second through hole 111. The first valve core 12 is a circular truncated cone with a small upper end and a large lower end, the second through hole 111 can be a tapered hole matched with the first valve core 12, and the upper end of the first valve core 12 is tightly combined with the peripheral wall of the second through hole 111 under the elastic pressure of the first elastic member 13, so as to realize the openable and closable plugging of the second through hole 111.

[0048] The oil injection assembly 20 can act on the first valve core 12 to open the first valve core 12 and communicate with the first valve body 11. When the unmanned aerial vehicle needs to be refueled, the oil injection assembly 20 moves towards the oil inlet assembly 10, abuts against the first valve core 12 of the oil inlet assembly 10 and presses downward the first valve core 12, so that the first spring 131 is compressed and the first valve core 12 moves downward, so that the first valve core 12 loses the plugging of the second through hole 111. Then, the oil injection assembly 20 enters the oil inlet assembly 10 and communicates with the inside of the first valve body 11. Then, the fuel enters the first valve body 11 through the oil injection assembly 20, and then enters the oil tank 30 of the unmanned aerial vehicle through the first valve body 11 to realize refueling. When the refueling is completed, the oil injection assembly 20 exits the oil inlet assembly 10, and the first valve core 12 is reset to plug the second through hole 111 under the elastic force of the first spring 131, and one refueling operation is completed.

[0049] Referring to Figure 1 and Figure 2The specific structure of the oil injection assembly 20 and the specific connection and cooperation relationship with the oil inlet assembly 10 are as follows: the oil injection assembly 20 comprises a second valve body 21, a second valve core 22, a second elastic member 23, and a second fixed plate 25, the second valve body 21 is capable of being inserted into the first valve body 11, the second valve core 22 is arranged in the second valve body 21, the second elastic member 23 is arranged on the second valve body 21, and the specific connection relationship among the second valve core 22, the second elastic member 23, and the second valve body 21 is as follows: the second elastic member 23 can be a second spring 231, the second fixed plate 25 is threadedly connected with the inner wall of the second valve body 21, the second valve core 22 is provided with a second sliding column 222, the second sliding column 222 is slidably inserted into the second fixed plate 25, the second spring 231 is sleeved on the second sliding column 222, and the two ends of the second spring 231 abut against the second valve core 22 and the second fixed plate 25. Since the second fixed plate 25 is threadedly connected with the inner wall of the second valve body 21, the second fixed plate 25 can be driven to move along the axis direction of the second valve core 22 by rotating the second fixed plate 25, so as to adjust the compression degree of the second spring 231, and further adjust the elastic force of the second spring 231 acting on the second valve core 22.

[0050] The second elastic member 23 is used to drive the second valve core 22 to open and close the second valve body 21 under pressure, and more specifically, the second valve body 21 is provided with a support plate 211, the support plate 211 forms a containing cavity 212 with the inner wall of the second valve body 21, a third through hole 2111 is formed in the support plate 211, and the second valve core 22 is blocked in the third through hole 2111 under the elastic force of the second elastic member 23. The second valve core 22 is a circular truncated cone with a large upper end and a small lower end, the third through hole 2111 can be a tapered hole matched with the second valve core 22, and the lower end of the second valve core 22 is tightly fitted with the peripheral wall of the third through hole 2111 under the elastic pressure of the second elastic member 23, so as to realize the openable and closable blocking of the second valve body 21.

[0051] The outer diameter of the second valve body 21 is smaller than the hole diameter of the second through hole 111, so that the second valve body 21 can be inserted into the first valve body 11. The elastic force of the second elastic member 23 is greater than the elastic force of the first elastic member 13. The second valve core 22 can abut against the first valve core 12, and more specifically, the bottom surface of the second valve core 22 is provided with an abutting column 221, and the second valve core 22 can abut against the first valve core 12 through the abutting column 221.

[0052] The implementation principle of the mechanical oiling butt joint structure is as follows: the oiling assembly 20 can be installed on the mechanical arm, the movement of the oiling assembly 20 is controlled by the mechanical arm, and the second valve body 21 is communicated with the fuel oil source. During the oiling process of the unmanned aerial vehicle, the oiling assembly 20 is moved to the direction of the oil inlet assembly 10 by the mechanical arm until the abutment column 221 abuts against the first valve core 12. After the abutment column 221 abuts against the first valve core 12, because the elastic force of the second elastic member 23 is greater than the elastic force of the first elastic member 13, when the oiling assembly 20 continues to move to the direction of the oil inlet assembly 10, the first elastic member 13 is compressed, the first valve core 12 is pushed, and the second through hole 111 is lost. At this time, the second elastic member 23 does not deform, and the second valve core 22 is in a sealing state at the third through hole 2111. Then, the oiling assembly 20 continues to move to the direction of the oil inlet assembly 10, so that the second valve body 21 is inserted into the second through hole 111 and communicated with the first valve body 11. When the first elastic member 13 is compressed to the limit position, the second elastic member 23 is compressed, the second valve core 22 moves relative to the second valve body 21, and the third through hole 2111 is lost. Then, the fuel can pass through the second valve body 21 and the first valve body 11, and pass through the third through hole 2111 and the second through hole 111 into the unmanned aerial vehicle fuel tank 30.

[0053] When the oiling is finished, the oiling assembly 20 moves away from the oil inlet assembly 10. Because the elastic force of the second elastic member 23 is greater than the elastic force of the first elastic member 13, during the movement, the second valve core 22 will seal the third through hole 2111 first before the first valve core 12 seals the second through hole 111, so that after the second valve core 22 is closed, the fuel flowing out of the third through hole 2111 can flow into the unmanned aerial vehicle fuel tank 30 through the second through hole 111, avoiding fuel leakage.

[0054] Embodiment 2

[0055] Reference Figure 1 and Figure 2The mechanical oiling butt joint structure of the embodiment is different from that of the embodiment 1 in that it further comprises a rotating driving member 40, and the oiling assembly 20 further comprises a rotating cylinder 24, which is rotatably sleeved outside the second valve body 21. More specifically, the outer sidewall of the second valve body 21 is provided with a clamping ring 214, and the outer sidewall of the rotating cylinder 24 is provided with a clamping groove 242, and the clamping ring 214 is rotatably clamped with the clamping groove 242. The abutting column 221 penetrates through the second valve body 21 and the bottom of the rotating cylinder 24, and the rotating cylinder 24 is used to open and close the second valve body 21. More specifically, the bottom wall of the rotating cylinder 24 is of a closed structure, the bottom wall of the rotating cylinder 24 is provided with a fourth through hole 241, the bottom of the second valve body 21 is provided with a fifth through hole 213, and the fourth through hole 241 and the fifth through hole 213 are vertically arranged. When the rotating cylinder 24 rotates relative to the second valve body 21, the fourth through hole 241 can coincide with or be staggered with the fifth through hole 213, so as to realize the openable and closable blocking of the second valve body 21.

[0056] When the oiling assembly 20 is in a non-oiling state, the fourth through hole 241 is staggered with the fifth through hole 213, and at this time the rotating cylinder 24 is in a blocking state relative to the second valve body 21. During the oiling process of the unmanned aerial vehicle, when the oiling assembly 20 is butt jointed with the oil inlet assembly 10, and the first valve core 12 and the second valve core 22 are both in an open state, the fourth through hole 241 is coincided with the fifth through hole 213 by driving the rotating cylinder 24 to rotate relative to the second valve body 21, at this time the fuel in the second valve body 21 can pass through the third through hole 2111, the fifth through hole 213 and the fourth through hole 241 into the first valve body 11, and then pass through the second through hole 111 into the unmanned aerial vehicle fuel tank 30. After the oiling assembly 20 is separated from the oil inlet assembly 10, the second valve core 22 is closed, at this time the fourth through hole 241 is staggered with the fifth through hole 213 by driving the rotating cylinder 24 to rotate relative to the second valve body 21, at this time the rotating cylinder 24 is in a blocking state relative to the second valve body 21, and the fuel remaining on the inner wall of the accommodating cavity 212 is blocked, so as to avoid the pollution caused by the fuel remaining on the inner wall of the accommodating cavity 212.

[0057] Referring to Figure 2 and Figure 3The rotating driving member 40 can drive the rotating cylinder 24 to rotate relative to the second valve body 21, and the specific structure of the rotating driving member 40 is as follows: the rotating driving member 40 comprises a worm wheel 41, a worm 42, a gear 43, a rack 44, a support frame 45 and a third elastic member 46. The rotating cylinder 24 is fixedly connected with the worm wheel 41. The worm 42 is rotatably connected with the collar 214. More specifically, the support frame 45 is fixedly arranged on the collar 214, and the worm 42 is rotatably connected with the support frame 45. The worm 42 is engaged with the worm wheel 41. The gear 43 is fixedly connected with the worm 42. The rack 44 is slidably arranged on the collar 214. More specifically, the support frame 45 is provided with a first guide sleeve 451 and a second guide sleeve 452, and the rack 44 is slidably arranged on the first guide sleeve 451 and the second guide sleeve 452. The rack 44 is engaged with the gear 43, and the lower end of the rack 44 can abut against the unmanned aerial vehicle oil tank 30. The two ends of the third elastic member 46 are connected with the support frame 45 and the rack 44 respectively. More specifically, the third elastic member 46 can be a third spring 461. The rack 44 is provided with a limiting plate 441 and an anti-disengagement plate 442. The first guide sleeve 451 is located between the limiting plate 441 and the anti-disengagement plate 442. The third spring 461 is sleeved on the outer side of the rack 44, and the two ends of the third spring 461 abut against the top surface of the limiting plate 441 and the bottom surface of the first guide sleeve 451 respectively. The third elastic member 46 is used to provide the elastic force for pushing the rack 44 to move downward relative to the collar 214.

[0058] The implementation principle of the mechanical oiling docking structure is as follows: in the process of oiling the unmanned aerial vehicle, the oil injection assembly 20 is controlled to move towards the oil inlet assembly 10 until the abutting column 221 abuts against the first valve core 12. After the abutting column 221 abuts against the first valve core 12, because the elastic force of the second elastic member 23 is greater than the elastic force of the first elastic member 13, when the oil injection assembly 20 continues to move towards the oil inlet assembly 10, the first elastic member 13 is compressed, the first valve core 12 is pushed, and the second through hole 111 is unblocked. At this time, the second elastic member 23 does not deform, and the second valve core 22 is in a blocking state at the third through hole 2111. Then, the oil injection assembly 20 continues to move towards the oil inlet assembly 10, so that the rotating cylinder 24 is inserted into the second through hole 111 until the first elastic member 13 is compressed to the limit position, and a state as shown in FIG. 8 is formed. Figure 3

[0059] ​Then, the oil injection assembly 20 continues to move towards the oil inlet assembly 10, at this time, the second elastic member 23 is compressed, the second valve core 22 moves relative to the second valve body 21, and the third through hole 2111 is unblocked. At the same time, the lower end of the rack 44 abuts against the unmanned aerial vehicle oil tank 30, and during the movement of the oil injection assembly 20 towards the oil inlet assembly 10, the gear 43 moves downward relative to the rack 44, thereby driving the gear 43 to rotate, the worm 42 is driven to rotate by the gear 43, the worm wheel 41 and the rotating cylinder 24 are driven to rotate relative to the second valve body 21 by the worm 42, the fifth through hole 213 and the fourth through hole 241 are switched from the staggered state to the coincident state, then the fuel in the second valve body 21 enters the first valve body 11 through the third through hole 2111, the fifth through hole 213 and the fourth through hole 241, and enters the unmanned aerial vehicle oil tank 30 through the second through hole 111 and the first through hole 31. When the refueling is completed, the oil injection assembly 20 is separated from the oil inlet assembly 10, the rack 44 is separated from the unmanned aerial vehicle oil tank 30, the rack 44 is driven to move downward relative to the ring 214 by the third elastic member 46, thereby driving the rotating cylinder 24 to rotate relative to the second valve body 21, the fifth through hole 213 and the fourth through hole 241 are switched from the coincident state to the staggered state, the second valve body 21 is blocked, and the fuel remaining on the inner wall of the accommodating cavity 212 is prevented from falling and causing pollution.

[0060] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A mechanical refueling docking structure, characterized by, The oil inlet assembly (10) and the oil injection assembly (20) are included, the oil inlet assembly (10) includes a first valve body (11), a first valve core (12) and a first elastic member (13), the first valve body (11) is used for communicating with the unmanned aerial vehicle oil tank (30), the first valve core (12) is arranged in the first valve body (11), the first elastic member (13) is arranged on the first valve body (11) and acts on the first valve core (12), the first elastic member (13) is used for driving the first valve core (12) to open and close the first valve body (11), the oil injection assembly (20) can act on the first valve core (12) to open the first valve core (12) and communicate with the first valve body (11); A second through hole (111) is formed in the upper part of the first valve body (11), the first valve core (12) is used for opening and closing the second through hole (111), the oil inlet assembly (10) further includes a first fixed plate (14), the first fixed plate (14) is threadedly connected with the inner wall of the first valve body (11), the first valve core (12) is provided with a first sliding column (121), the first sliding column (121) is slidingly inserted into the first fixed plate (14), and the two ends of the first elastic member (13) are connected with the first valve core (12) and the first fixed plate (14); The oil injection assembly (20) includes a second valve body (21), a second valve core (22) and a second elastic member (23), the second valve body (21) can be inserted into the first valve body (11), the second valve core (22) is arranged in the second valve body (21), the second valve core (22) can abut against the first valve core (12), the second elastic member (23) is arranged on the second valve body (21), the second elastic member (23) is used for driving the second valve core (22) to open and close the second valve body (21), and the elastic force of the second elastic member (23) is greater than that of the first elastic member (13); The oil injection assembly (20) further includes a rotating cylinder (24), the rotating cylinder (24) is rotatably sleeved outside the second valve body (21), the rotating cylinder (24) is used for opening and closing the second valve body (21), the second valve body (21) is provided with a support plate (211), the support plate (211) and the inner wall of the second valve body (21) form a containing cavity (212), a third through hole (2111) is formed in the support plate (211), the second valve core (22) is used for plugging the third through hole (2111), the second valve core (22) is provided with an abutment column (221), the abutment column (221) penetrates through the second valve body (21) and the bottom of the rotating cylinder (24), and the abutment column (221) is used for abutting against the first valve core (12).

2. A mechanical refuelling docking structure according to claim 1, characterised in that The unmanned aerial vehicle oil tank (30) is provided with a first through hole (31), and a threaded joint (32) is arranged on the unmanned aerial vehicle oil tank (30), the threaded joint (32) is arranged around the first through hole (31), and the inner side wall of the first valve body (11) is provided with an internal thread, and the first valve body (11) is threadedly connected with the threaded joint (32) through the internal thread.

3. The mechanical refueling docking structure of claim 1, wherein, The oil injection assembly (20) further comprises a second fixed plate (25), the second fixed plate (25) is threadedly connected with the inner wall of the second valve body (21), the second valve core (22) is provided with a second sliding column (222), the second sliding column (222) is slidingly inserted into the second fixed plate (25), and the second elastic member (23) is connected between the second valve core (22) and the second fixed plate (25).

4. The mechanical refueling docking structure of claim 1, wherein, The bottom wall of the rotating cylinder (24) is provided with a fourth through hole (241), the bottom of the second valve body (21) is provided with a fifth through hole (213), the fourth through hole (241) and the fifth through hole (213) are arranged vertically, and when the rotating cylinder (24) rotates relative to the second valve body (21), the fourth through hole (241) can coincide with or be staggered with the fifth through hole (213).

5. The mechanical refueling docking structure of claim 1, wherein, The outer side wall of the second valve body (21) is provided with a clamping ring (214), and the outer side wall of the rotating cylinder (24) is provided with a clamping groove (242), the clamping ring (214) is rotationally connected with the clamping groove (242).

6. The mechanical refueling docking structure of claim 1, wherein, The rotating drive member (40) comprises a worm wheel (41), a worm (42), a gear (43) and a rack (44), the rotating cylinder (24) is fixedly connected with the worm wheel (41), the worm (42) is engaged with the worm wheel (41), the gear (43) is fixedly connected with the worm (42), the rack (44) is engaged with the gear (43), and the lower end of the rack (44) can abut against the unmanned aerial vehicle oil tank (30).

7. A mechanical refuelling docking structure according to claim 6, wherein The rotating drive member (40) further comprises a support frame (45) and a third elastic member (46), the support frame (45) is fixedly arranged on the clamping ring (214), the worm (42) is rotationally connected with the support frame (45), the support frame (45) is provided with a first guide sleeve (451), the rack (44) is slidingly arranged in the first guide sleeve (451), and the two ends of the third elastic member (46) are connected with the support frame (45) and the rack (44) respectively. The third elastic member (46) is used for providing elastic force for pushing the rack (44) to move downward relative to the clamping ring (214).

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