CN213414208U

CN213414208U - Unmanned aerial vehicle undercarriage

Info

Publication number: CN213414208U
Application number: CN202022634449.7U
Authority: CN
Inventors: 杨少华; 丁锋
Original assignee: Beijing Haili Tianmeng Science And Technology Co ltd
Current assignee: Beijing Haili Tianmeng Science And Technology Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-06-11
Anticipated expiration: 2030-11-13

Abstract

The utility model relates to an unmanned aerial vehicle undercarriage belongs to unmanned aerial vehicle landing technical field, and the impact force to unmanned aerial vehicle receiving at the in-process of rising and falling is born by self, and the easy load takes place the fracture problem when the impact force that unmanned aerial vehicle received is great provides following technical scheme, the technical essential of this application including can with unmanned aerial vehicle casing fixed connection's mounting bracket, hydraulic buffer and wheel, hydraulic buffer sets up between wheel and mounting bracket, hydraulic buffer includes dead lever and movable rod, the dead lever has been seted up and has been supplied movable rod male buffering passageway, dead lever and movable rod cup joint, the axis direction that buffering passageway can be followed to the movable rod slides. This application has the advantage that improves undercarriage buffering effect, extension unmanned aerial vehicle's life.

Description

Unmanned aerial vehicle undercarriage

Technical Field

The application relates to the technical field of unmanned aerial vehicle landing, in particular to an unmanned aerial vehicle undercarriage.

Background

The unmanned aerial vehicle is an unmanned aerial vehicle operated by a radio remote control device and a self-contained program control device. At present, unmanned aerial vehicles are widely applied to the fields of meteorology, agriculture, exploration, photography, disaster prevention and reduction, crop yield estimation, drug and personal arrest, border patrol, public security and counter terrorism and the like.

The support is adopted more to current unmanned aerial vehicle undercarriage, is provided with the rigid support in unmanned aerial vehicle's below promptly, and unmanned aerial vehicle inevitably receives the strong reaction force impact in ground in the process of rising and falling, because the support rigidity sets up for unmanned aerial vehicle bears by self at the impact force that the in-process that rises and falls, and the easy load breaks when the impact force that unmanned aerial vehicle received is great.

SUMMERY OF THE UTILITY MODEL

In order to improve undercarriage buffering effect, extension unmanned aerial vehicle's life, this application provides an unmanned aerial vehicle undercarriage, adopts following technological means:

the utility model provides an unmanned aerial vehicle undercarriage, including can with unmanned aerial vehicle casing fixed connection's mounting bracket, hydraulic buffer and wheel, hydraulic buffer sets up between wheel and mounting bracket, hydraulic buffer includes dead lever and movable rod, the dead lever is seted up and is supplied movable rod male buffering passageway, dead lever and movable rod cup joint, the axis direction that buffering passageway can be followed to the movable rod slides.

Through adopting above-mentioned technical scheme, when unmanned aerial vehicle landed, through the movable rod in the inside slip of buffering passageway, realize the compression to the inside gas of buffering passageway, the impact force that receives when deformation through the compression of air and wheel tire absorbed unmanned aerial vehicle landed to reduce the impact force and to unmanned aerial vehicle's influence, improve undercarriage buffering effect, prolong unmanned aerial vehicle's life.

Optionally, a partition is arranged inside the buffer channel, a first buffer cavity used for filling gas is enclosed between the partition and the bottom wall of the buffer channel, a second buffer cavity used for filling hydraulic oil is enclosed between the partition and the movable rod, and the partition can slide along the inner wall of the buffer channel.

Through adopting above-mentioned technical scheme, when unmanned aerial vehicle landed, the movable rod slided along buffering passageway axis side, and the movable rod removes to one side that is close to the separator, extrudees the inside hydraulic oil of second cushion chamber, and hydraulic oil promotes the separator, realizes the inside gaseous compression of first cushion chamber, through the removal of hydraulic oil compression, gaseous compression and movable rod, the realization is to the impact force buffering that receives when unmanned aerial vehicle landed, reduces the harm to unmanned aerial vehicle.

Optionally, the movable rod is provided with an accommodating cavity, the accommodating cavity is provided with a capillary hole, the pore diameter of the capillary hole is smaller than the inner diameter of the accommodating cavity, and the accommodating cavity is communicated with the second buffer cavity.

Through adopting above-mentioned technical scheme, when the inside hydraulic oil of extrusion second cushion chamber, partial hydraulic oil passes through the inside that the capillary entered into the chamber that holds, and partial hydraulic oil promotes the separator, promotes the inside gas of separator extrusion first cushion chamber, and the range of movement of increase movable rod improves the buffer capacity to the impulsive force.

Optionally, a sealing member is disposed between the movable rod inside the second buffer cavity and the inner wall of the buffer channel.

Through adopting above-mentioned technical scheme, improve the leakproofness of second cushion chamber, avoid hydraulic oil to spill over the second cushion chamber receiving extruded in-process, reduce the loss of hydraulic oil.

Optionally, the fixing rod is provided with a gas filling hole, a gas filling pipe is arranged at the gas filling hole and communicated with the first buffer cavity, and the gas filling pipe is provided with a one-way gas valve assembly for preventing gas inside the first buffer cavity from overflowing.

Through adopting above-mentioned technical scheme, when unmanned aerial vehicle steadily slided after landing, through gas injection pipe to first cushion chamber inside injection gas, the inside gas of first cushion chamber increases, and gas promotes the separator and removes to one side that is close to the movable rod, realizes the promotion to hydraulic oil, realizes resetting to the movable rod.

Optionally, the one-way air valve assembly comprises a fixing ring and a stop block which are fixedly arranged inside the gas filling pipe, the fixing ring is arranged on one side close to the inlet of the gas filling pipe, the inner diameter of the fixing ring is smaller than that of the gas filling pipe, a blocking block capable of sealing the inner diameter of the fixing ring is connected to the inside of the gas filling pipe in a sliding mode, and an elastic piece capable of keeping the blocking block blocking the fixing ring is arranged between the blocking block and the stop block.

By adopting the technical scheme, when the gas in the first buffer cavity is extruded, the gas in the first buffer cavity is prevented from overflowing the first buffer cavity under the action of the blocking block, and the buffer effect of the gas on the impact force is kept; when needs drive movable rod reset, through gas injection pipe to first buffer chamber inside injection gas, gas promotes the sprue and removes to the one side of keeping away from solid fixed ring, removes the sprue and to solid fixed ring's sheltering from, and gas gets into first buffer chamber through the interval between sprue and the gas injection inside pipe wall, realizes the effect of aerifing to first buffer chamber.

Optionally, the blocking block is arranged in a spherical shape, and the outer diameter of the blocking block is smaller than the inner diameter of the gas filling pipe.

Through adopting above-mentioned technical scheme, reduce the frictional force between sprue and the gas tube, the gaseous sprue of promoting of being convenient for is to keeping away from solid fixed ring's one side and is removed.

Optionally, a torque arm assembly is arranged between the fixed rod and the movable rod, and the torque arm assembly is hinged to the outer wall of the fixed rod and the outer wall of the movable rod, so that the movable rod can move in a telescopic manner along the axis direction of the fixed rod.

By adopting the technical scheme, the movable rod can conveniently move in a telescopic manner along the axis direction of the fixed rod, and the movement direction of the movable rod is guided.

Optionally, the torque arm assembly comprises a first hinge rod and a second hinge rod, one end of the first hinge rod is hinged to the second hinge rod, one end of the first hinge rod, far away from the second hinge rod, is hinged to the fixed rod, and one end of the second hinge rod, far away from the first hinge rod, is hinged to the movable rod.

Through adopting above-mentioned technical scheme, when the movable rod motion, the movable rod drives the motion of second articulated rod for the contained angle between second articulated rod and the first articulated rod reduces, because second articulated rod and first articulated rod are articulated, restricts the movable rod along dead lever axis direction concertina movement.

In summary, the present application has the following beneficial effects:

firstly, the compression of gas in a buffer channel is realized through the telescopic motion of a movable rod, and the impact force applied to the unmanned aerial vehicle during landing is absorbed through the compression of the air and the deformation of wheel tires, so that the influence of the impact force on the unmanned aerial vehicle is reduced, the buffering effect of an undercarriage is improved, and the service life of the unmanned aerial vehicle is prolonged;

secondly, gas is injected into the first buffer cavity through the gas filling pipe, so that the movable rod can be reset when the unmanned aerial vehicle stably slides after landing;

third, can restrict the movable rod slow movement through set up one-way pneumatic valve subassembly in gas filling pipe department, improve the stability of unmanned aerial vehicle landing in-process.

Drawings

Fig. 1 is a schematic overall structure diagram of an unmanned aerial vehicle landing gear according to an embodiment of the present application;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a sectional view taken along line A-A in FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 3;

fig. 5 is an enlarged view of a portion C in fig. 3.

In the figure, 1, a mounting frame; 2. a hydraulic buffer device; 21. fixing the rod; 211. a buffer channel; 2111. a first buffer chamber; 2112. a second buffer chamber; 2113. air holes are added; 22. a movable rod; 221. an accommodating chamber; 23. a separator; 231. mounting holes; 3. a machine wheel; 41. mounting blocks; 411. connecting holes; 42. a connecting rod; 5. a seal member; 6. an air adding pipe; 7. a one-way air valve assembly; 71. a fixing ring; 72. a stopper; 73. blocking; 74. a compression spring; 8. a fixed block; 9. installing a bolt; 91. capillary pores; 92. bolt holes; 10. a reinforcing bar; 101. an oil passing hole; 20. a mounting ring; 30. an oil storage cavity; 40. a torque arm assembly; 401. a first hinge lever; 402. a second hinge rod.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Referring to fig. 1, for the unmanned aerial vehicle undercarriage that this application discloses, including mounting bracket 1, hydraulic buffer 2 and the wheel 3 that can with unmanned aerial vehicle casing fixed connection, hydraulic buffer 2 sets up between wheel 3 and mounting bracket 1, and when unmanned aerial vehicle landed, the buffering to the unmanned aerial vehicle impact force was realized to the deformation of hydraulic buffer 2's buffering and wheel 3. The lateral wall of mounting bracket 1 passes through bolt and unmanned aerial vehicle casing fixed connection, realizes undercarriage and unmanned aerial vehicle's fixed connection.

Referring to fig. 2 and 3, the hydraulic buffer device 2 includes a fixed lever 21 and a movable lever 22. The fixing rod 21 is arranged in a cylindrical shape, the fixing rod 21 is provided with a buffer channel 211 along the axis direction, the buffer channel 211 is arranged in a cylindrical shape with two open ends, the upper end opening of the fixing rod 21 is in threaded connection with an installation block 41, and the installation block 41 can seal the upper end opening of the buffer channel 211.

Referring to fig. 3, a partition 23 is disposed inside the buffer channel 211, the partition 23 can slide along an inner wall of the buffer channel 211, a mounting hole 231 is formed in one side of the partition 23 facing the mounting block 41, a connecting rod 42 is inserted into the mounting hole 231, the connecting rod 42 is vertically disposed, and an axis of the connecting rod 42 coincides with an axis of the fixing rod 21. The lower end spacer 23 of the connecting rod 42 is screwed, and the upper end of the connecting rod 42 penetrates the mounting block 41 and extends to the outside of the buffer passage 211. Mounting bracket 1 has seted up connecting hole 411 along its vertical length direction, and connecting hole 411 and buffer passage 211 intercommunication, and the upper end of connecting rod 42 is pegged graft in the inside of connecting hole 411, and connecting rod 42 rather than in connecting hole 411 sliding connection realizes the fixed connection between dead lever 21 and the mounting bracket 1.

Referring to fig. 3, the partition 23 is provided with a sealing member 5 at a contact end with an inner wall of the buffer passage 211, the sealing member 5 is made of a flexible rubber material, and the sealing member 5 and the partition 23 are fixed by adhesion, so that the sealing member 5 always maintains a sealing state at a connection position between the partition 23 and the buffer passage 211 in a process that the partition 23 moves along the inner wall of the buffer passage 211.

Referring to fig. 3, the partition 23 partitions the interior of the buffer passage 211 into a first buffer chamber 2111 and a second buffer chamber 2112, the first buffer chamber 2111 and the second buffer chamber 2112 are vertically arranged along the axial direction of the fixing rod 21, the first buffer chamber 2111 is arranged above the second buffer chamber 2112, the sidewall of the first buffer chamber 2111 is provided with a gas filling hole 2113, the gas filling hole 2113 can communicate the interior and exterior of the first buffer chamber 2111, hydraulic oil is injected into the second buffer chamber 2112 in advance between the partitions 23 which are not installed, then the partition 23 is installed into the interior of the buffer passage 211, and then gas is added into the interior of the first buffer chamber 2111 through the gas filling hole 2113.

Referring to fig. 3, a gas filling pipe 6 is fixedly installed at the gas filling hole 2113 of the fixing rod 21, the gas filling pipe 6 is communicated with the first buffer chamber 2111, and a one-way gas valve assembly 7 for preventing gas in the first buffer chamber 2111 from overflowing is arranged in the gas filling pipe 6.

Referring to fig. 3 and 4, the one-way valve assembly 7 includes a fixing ring 71 fixed inside the gas filling pipe 6, a stopper 72, a blocking block 73 and an elastic member.

Referring to fig. 3 and 4, the fixing ring 71 is annularly disposed, the axis of the gas filling pipe 6 intersects with the center of the fixing ring 71 at a point, the point coincides with the center of the fixing ring 71, and the fixing ring 71 is fixedly connected with the contact end of the gas filling pipe 6. The inner diameter of the fixing ring 71 is smaller than the inner diameter of the gas filling pipe 6.

Referring to fig. 4, the blocking piece 73 is disposed between the fixing ring 71 and the stopper 72, the blocking piece 73 is disposed in a spherical shape, an outer diameter of the blocking piece 73 is smaller than an inner diameter of the gas filling pipe 6, and an outer diameter of the blocking piece 73 is larger than the inner diameter of the fixing ring 71, when the blocking piece 73 contacts the fixing ring 71, the blocking piece 73 can block the inner diameter of the fixing ring 71, so that the gas inside the buffer passage 211 cannot overflow the gas filling pipe 6 through the inner diameter of the fixing ring 71.

Referring to fig. 4, the elastic member is a compression spring 74, the compression spring 74 is disposed between the blocking block 73 and the stop block 72, the stop block 72 is disposed along the radial direction of the gas filling pipe 6, the stop block 72 is vertically disposed, two ends of the stop block 72 are respectively fixedly connected with the inner wall of the gas filling pipe 6, and a gas hole for gas to pass through is reserved between the stop block 72 and the inner wall of the gas filling pipe 6. One end of the compression spring 74 is fixedly connected to the stopper 72, and the other end thereof abuts against the stopper 73, so that the stopper 73 can be closed to the inner diameter of the fixed ring 71 when the compression spring 74 is in a natural state. When gas enters the gas filling pipe 6 from the opening close to one side of the fixing ring 71, the gas pushes the blocking block 73 to move towards the side far away from the fixing ring 71, the blocking of the blocking block 73 on the fixing ring 71 is removed, and the gas can enter the buffer channel 211 through the opening and the air hole of the gas filling pipe 6, so that the gas filling in the second buffer cavity 2112 is realized.

With reference to fig. 3 and 5, the movable rod 22 is vertically disposed, and the upper end of the movable rod 22 is inserted into the buffer passage 211, so that the fixed rod 21 is sleeved outside the movable rod 22, the movable rod 22 extends to the inside of the second buffer cavity 2112, and the movable rod 22 can move along the axial length direction of the second buffer cavity 2112. The movable rod 22 can slide along the axis direction of the buffer passage 211, the fixed rod 21 is connected with the fixed block 8 at the lower end opening of the buffer passage 211 through threads, the lower end of the movable rod 22 runs through the fixed block 8 and extends to the outside of the buffer passage 211, and the movable rod 22 is connected with the fixed block 8 through the connecting end in a sliding manner and can prevent the movable rod 22 from dropping off from the buffer passage 211 under the limiting action of the fixed block 8.

With reference to fig. 3 and 5, the movable rod 22 is provided with an accommodating cavity 221 along the axial direction thereof, an opening end of the accommodating cavity 221 faces the buffer channel 211, the opening end of the upper end of the movable rod 22 is connected with the mounting bolt 9 in a threaded manner, the mounting bolt 9 is provided with a capillary hole 91, the accommodating cavity 221 is communicated with the second buffer cavity 2112 under the action of the capillary hole 91, and the pore diameter of the capillary hole 91 is smaller than the inner diameter of the accommodating cavity 221.

With reference to fig. 3 and 5, the movable rod 22 is provided with a reinforcing rod 10 inside the accommodating cavity 221, the axis of the reinforcing rod 10 coincides with the axis of the movable rod 22, two mounting rings 20 are fixedly arranged inside the accommodating cavity 221, the two mounting rings 20 are arranged at intervals up and down along the axis of the movable rod 22, the lower end of the reinforcing rod 10 penetrates through the centers of the two mounting rings 20 and is in threaded connection with the mounting rings 20, and the oil storage cavity 30 is defined by the lower end of the reinforcing rod 10 and the bottom wall of the accommodating cavity 221. The mounting bolt 9 is provided with a bolt hole 92, the upper end of the reinforcing rod 10 is inserted into the bolt hole 92, and the reinforcing rod 10 is in threaded connection with the mounting bolt 9. The reinforcing rod 10 is provided with an oil passing hole 101 along the axial direction thereof, the upper end of the oil passing hole 101 is communicated with the capillary hole 91, and the lower end of the oil passing hole 101 is communicated with the oil storage chamber 30. The connection strength of the mounting bolt 9 and the movable rod 22 is improved by the reinforcing rod 10.

Referring to fig. 3 and 5, a torque arm assembly 40 is disposed between the fixed rod 21 and the movable rod 22, the torque arm assembly 40 enables the movable rod 22 to move telescopically along the axis of the fixed rod 21, the torque arm assembly 40 includes a first hinge rod 401 and a second hinge rod 402, one end of the first hinge rod 401 is hinged to the second hinge rod 402, one end of the first hinge rod 401 away from the second hinge rod 402 is hinged to the fixed rod 21, one end of the second hinge rod 402 away from the first hinge rod 401 is hinged to the movable rod 22, and a triangle is defined between the first hinge rod 401 and the second hinge rod 402 and the fixed rod 21.

The implementation principle of the embodiment is as follows: when unmanned aerial vehicle lands, the movable rod 22 receives the impact force to the removal that is close to separator 23, the inside hydraulic oil of in-process extrusion second cushion chamber 2112 that movable rod 22 removed, part hydraulic oil passes through capillary hole 91, cross the inside that oilhole 101 got into oil storage chamber 30, hydraulic oil receives and promotes separator 23 among the extrusion process, the synchronous rebound of separator 23, the in-process extrusion of separator 23 rebound is located the inside gas of first cushion chamber 2111, gaseous compression, the impact force that receives when the deformation of the compression of hydraulic oil and 3 tires of wheel can absorb unmanned aerial vehicle lands, thereby reduce the influence to unmanned aerial vehicle, improve the impact force buffering effect, extension unmanned aerial vehicle's life.

When unmanned aerial vehicle steadily slided on the land, to the inside injected gas of trachea 6, inside gas entering trachea 6, gas can promote the sprue 73 and remove to the one side of keeping away from solid fixed ring 71, relieve sprue 73 and to solid fixed ring 71's sheltering from, gas can get into inside buffer passage 211 through 6 openings of trachea and gas vent, the realization is to the inside gas filling of second cushion chamber 2112, increase along with the inside gas content of second cushion chamber 2112, gas promotes separator 23 reverse motion, separator 23 extrudes the inside hydraulic oil of second cushion chamber 2112, make the inside hydraulic oil backward flow of oil storage chamber 30 inside second cushion chamber 2112, make movable rod 22 drive wheel 3 answer the normal position.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an unmanned aerial vehicle undercarriage, its characterized in that, including mounting bracket (1), hydraulic buffer (2) and wheel (3) that can with unmanned aerial vehicle casing fixed connection, hydraulic buffer (2) set up between wheel (3) and mounting bracket (1), hydraulic buffer (2) include dead lever (21) and movable rod (22), confession movable rod (22) male buffering passageway (211) have been seted up in dead lever (21), dead lever (21) and movable rod (22) cup joint, the axis direction that buffering passageway (211) can be followed in movable rod (22) slides.

2. An unmanned aerial vehicle landing gear according to claim 1, wherein a partition (23) is arranged inside the buffer channel (211), a first buffer cavity (2111) for filling gas is defined between the partition (23) and the bottom wall of the buffer channel (211), a second buffer cavity (2112) for filling hydraulic oil is defined between the partition (23) and the movable rod (22), and the partition (23) can slide along the inner wall of the buffer channel (211).

3. The landing gear of claim 2, wherein the movable rod (22) is provided with an accommodating cavity (221), the accommodating cavity (221) is provided with a capillary hole (91), the pore diameter of the capillary hole (91) is smaller than the inner diameter of the accommodating cavity (221), and the accommodating cavity (221) is communicated with the second buffer cavity (2112).

4. An unmanned landing gear according to claim 2, wherein a seal (5) is provided between the movable rod (22) inside the second buffer chamber (2112) and the inner wall of the buffer channel (211).

5. The unmanned aerial vehicle landing gear according to claim 1, wherein the fixing rod (21) is provided with a gas filling hole (2113), a gas filling pipe (6) is arranged at the gas filling hole (2113), the gas filling pipe (6) is communicated with the first buffer cavity (2111), and the gas filling pipe (6) is provided with a one-way gas valve assembly (7) for preventing gas inside the first buffer cavity (2111) from overflowing.

6. The unmanned aerial vehicle landing gear according to claim 5, wherein the one-way air valve assembly (7) comprises a fixing ring (71) and a stop block (72) which are fixedly arranged inside the air adding pipe (6), the fixing ring (71) is arranged on one side close to an inlet of the air adding pipe (6), the inner diameter of the fixing ring (71) is smaller than the inner diameter of the air adding pipe (6), a blocking block (73) capable of sealing the inner diameter of the fixing ring (71) is slidably connected inside the air adding pipe (6), and an elastic piece capable of keeping the blocking block (73) to block the fixing ring (71) is arranged between the blocking block (73) and the stop block (72).

7. An unmanned aircraft landing gear according to claim 6, wherein the plugs (73) are arranged spherically, the outer diameter of the plugs (73) being less than the inner diameter of the filler tube (6).

8. The landing gear of claim 1, wherein a torque arm assembly (40) is arranged between the fixed rod (21) and the movable rod (22), and the torque arm assembly (40) is hinged to the outer wall of the fixed rod (21) and the outer wall of the movable rod (22) to enable the movable rod (22) to move telescopically along the axis of the fixed rod (21).

9. An unmanned aircraft landing gear according to claim 8, wherein the torque arm assembly (40) comprises a first hinge rod (401) and a second hinge rod (402), wherein one end of the first hinge rod (401) is hinged to the second hinge rod (402), one end of the first hinge rod (401) remote from the second hinge rod (402) is hinged to the fixed rod (21), and one end of the second hinge rod (402) remote from the first hinge rod (401) is hinged to the movable rod (22).