CN210503162U - Light small-size unmanned aerial vehicle skid formula undercarriage structure - Google Patents
Light small-size unmanned aerial vehicle skid formula undercarriage structure Download PDFInfo
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- CN210503162U CN210503162U CN201921264237.5U CN201921264237U CN210503162U CN 210503162 U CN210503162 U CN 210503162U CN 201921264237 U CN201921264237 U CN 201921264237U CN 210503162 U CN210503162 U CN 210503162U
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Abstract
The utility model relates to a light unmanned aerial vehicle skid undercarriage structure, its characterized in that: the skid type undercarriage structure of the light and small unmanned aerial vehicle comprises a rack arranged at the lower part of the light and small unmanned aerial vehicle, two parallel screw rods hinged in the rack body, namely a first screw rod and a second screw rod, wherein the middle parts of the two screw rods are respectively provided with a synchronous chain wheel; two sides of a synchronous chain wheel of each parallel screw rod are provided with screw threads which are opposite in spiral direction, the screw threads are connected with screw sleeves in a threaded manner, the lower parts of the screw sleeves are hinged with a swing frame and telescopic supporting legs arranged on the swing frame, and the lower end parts of the telescopic supporting legs positioned on the same side are connected with a skid plate; this light small-size unmanned aerial vehicle skid undercarriage structural design is reasonable, is favorable to the use of the undercarriage of convenient installation on gyroplane and stationary vane.
Description
The technical field is as follows:
the utility model relates to a light unmanned aerial vehicle skid undercarriage structure.
Background art:
safe take-off and landing are the basis for the unmanned aerial vehicle to carry out operation tasks, and at present, the take-off mode of the fixed wing unmanned aerial vehicle at home and abroad is vertical take-off from the ground by means of an undercarriage, and the take-off mode of a rotary wing aircraft with a handheld undercarriage and the take-off mode of a runway running fixed wing unmanned aerial vehicle are several. However, most of the existing devices for taking off and landing of unmanned aerial vehicles are landing gears or tires, and the research on the universal landing gear which can be installed on the rotorcraft and the fixed wing is relatively less.
The invention content is as follows:
an object of the utility model is to provide a light unmanned aerial vehicle skid formula undercarriage structure promptly, this light unmanned aerial vehicle skid formula undercarriage structural design is reasonable, is favorable to the use of the undercarriage of convenient installation on gyroplane and stationary vane.
The utility model discloses light small-size unmanned aerial vehicle skid undercarriage structure, its characterized in that: the automatic transmission mechanism comprises a rack arranged at the lower part of the small light unmanned aerial vehicle and two parallel screw rods hinged in the rack body, namely a first screw rod and a second screw rod, wherein the middle parts of the two screw rods are respectively provided with a synchronous chain wheel; the two sides of the synchronous chain wheel of each parallel screw rod are provided with screw threads in opposite directions, the screw threads are connected with screw sleeves in a screwed mode, the lower portions of the screw sleeves are hinged with a swing frame and telescopic supporting legs arranged on the swing frame, and the lower end portions of the telescopic supporting legs located on the same side are connected with a skid plate.
Furthermore, the rack comprises two side plates and a transverse plate connected to the lower portions of the two side plates, a groove is formed in the transverse plate and used for allowing the threaded sleeve to penetrate through, and the threaded sleeve is limited to slide in the groove.
Furthermore, the threaded sleeve comprises a screw hole which is matched and screwed with the thread at the upper part and lug plates for hinging at two sides of the lower part.
Furthermore, the swing frame is a square steel pipe, two ends of the upper portion of the square steel pipe are hinged between the two lug pieces, the first side portion of the square steel pipe is hinged to the first end of the first electric pushing cylinder, and the first side portion of the threaded sleeve is hinged to the second end of the first electric pushing cylinder, so that swing of the swing frame is achieved when the first electric pushing cylinder stretches out and draws back.
Furthermore, the second side part of the square steel pipe is hinged with the upper end of the second electric pushing cylinder, and the second side part of the telescopic supporting leg is hinged with the second end of the second electric pushing cylinder so as to realize the lifting of the telescopic supporting leg.
The utility model discloses a light and small unmanned aerial vehicle skid undercarriage structure's working method, light and small unmanned aerial vehicle skid undercarriage structure includes the frame of establishing in light and small unmanned aerial vehicle lower part and articulates two parallel lead screws in the frame body, is first lead screw and second lead screw respectively, and the middle part of two lead screws is equipped with synchronous sprocket respectively, is connected with synchronous chain on the synchronous sprocket of two lead screws, be equipped with the motor in the frame and be used for making the first chain drive mechanism of first lead screw rotation by motor drive; two sides of a synchronous chain wheel of each parallel screw rod are provided with screw threads which are opposite in spiral direction, the screw threads are connected with screw sleeves in a threaded manner, the lower parts of the screw sleeves are hinged with a swing frame and telescopic supporting legs arranged on the swing frame, and the lower end parts of the telescopic supporting legs positioned on the same side are connected with a skid plate; when the light and small unmanned aerial vehicle is parked on the ground, the swing frame and the telescopic supporting legs are perpendicular to the ground, and when the distance between the swing frames at two sides needs to be adjusted, the motor drives the first chain transmission mechanism to act, so that the first screw rod drives the second screw rod to synchronously rotate through the synchronous chain, the screw rod drives the screw sleeve on the screw rod to be relatively close to or relatively far away from, and the length of the telescopic supporting legs can be adjusted to change the distance between the frame and the skid plate; after the light unmanned aerial vehicle takes off, the swinging brackets and the telescopic supporting legs on the two sides are folded and close to the bottom surface of the frame.
Furthermore, the swing frame is a square steel pipe, two ends of the upper part of the square steel pipe are hinged between the two lug plates, the first side part of the square steel is hinged with the first end of the first electric pushing cylinder, and the first side part of the threaded sleeve is hinged with the second end of the first electric pushing cylinder, so that the swing frame can swing when the first electric pushing cylinder stretches; the second side part of the square steel pipe is hinged with the upper end of the second electric pushing cylinder, and the second side part of the telescopic supporting leg is hinged with the second end of the second electric pushing cylinder so as to realize the lifting of the telescopic supporting leg; the first electric pushing cylinder is driven to stretch, so that the upper part of the square steel pipe swings around a hinge point, and the swinging brackets and the telescopic supporting legs on the two sides are folded and close to the bottom surface of the rack; and the second electric pushing cylinder is driven to extend or shorten the telescopic supporting legs relative to the square steel pipe, so that the distance between the rack and the skid plate is changed.
The utility model discloses light and small unmanned aerial vehicle skid undercarriage is simple structure, low in processing cost, and low in maintenance requirement, and this undercarriage adopts square steel pipe, scalable supporting legs (interior steel tubular product) and second electric propulsion jar as buffering and bearing structure, and the skid plate contact ground below the scalable supporting legs, improves the stability of landing, but the flexible ski design of retractable ski can help light and small unmanned aerial vehicle make unmanned aerial vehicle (such as weeds, clay) set up organism itself on the abominable ground of environment through the flexible mode of undercarriage, make the organism avoid the paddle to rotate and blow the debris interference that flies, in addition the folding of pendulum revolving rack makes unmanned aerial vehicle also can not receive extra air resistance influence continuation of endurance when flying; the swing rotary frames controlled by the screw transmission move in the opposite direction or in the opposite direction synchronously to change the wheelbase to adapt to different types of unmanned aerial vehicles and different use sites.
Description of the drawings:
fig. 1 is a schematic three-dimensional structure of the swing frame of the present invention in a folded state;
FIG. 2 is a schematic perspective view of FIG. 1 from another perspective;
FIG. 3 is a schematic perspective view of the connection of the threaded sleeve and the swing frame;
FIG. 4 is a schematic perspective view of the insert;
fig. 5 is a front view configuration diagram of the present invention.
The specific implementation mode is as follows:
the method of the present invention will be described in further detail with reference to examples. It should be noted that the protection scope of the present invention should include, but not be limited to, the technical content disclosed in the present embodiment.
The utility model discloses light small-size unmanned aerial vehicle skid undercarriage structure includes frame 1 and two parallel lead screws 2 that articulate in frame 1 body that establish in light small-size unmanned aerial vehicle lower part, is first lead screw 201 and second lead screw 202 respectively, and the both ends of two parallel lead screws 2 are articulated respectively on the board of both sides, and the middle part of two lead screws is equipped with synchronous sprocket 3 respectively, is connected with synchronous chain 4 on the synchronous sprocket 3 of two lead screws, and the diameter of two synchronous sprocket 3 is the same, and the rotational speed is the same, be equipped with motor 5 and be used for making the first lead screw 201 pivoted first chain drive mechanism 6 by motor drive on frame 1; two sides of a synchronous chain wheel 3 of each parallel screw rod 2 are provided with screw threads 7 in opposite spiral directions, the screw threads 7 are connected with screw sleeves 8 in a threaded mode, the lower portions of the screw sleeves 8 are hinged with a swing frame 9 and telescopic supporting legs 10 arranged on the swing frame 9, the lower end portions of the telescopic supporting legs 10 positioned on the same side are connected with a skid plate 11, when the light and small unmanned aerial vehicle is parked on the ground, the swing frame and the telescopic supporting legs are perpendicular to the ground, and when the space between the swing frames on the two sides needs to be adjusted, a motor drives a first chain transmission mechanism to act, so that a first screw rod drives a second screw rod to synchronously rotate through a synchronous chain, the screw rods drive the screw sleeves on the screw rods to be relatively close to or far away from each other, and the length of the telescopic supporting legs can be adjusted to change the distance; after the light unmanned aerial vehicle takes off, the swinging brackets and the telescopic supporting legs on the two sides are folded and are close to the bottom surface of the frame, and the synchronous chain 4 and the synchronous chain wheel 3 can be replaced by a synchronous belt and a synchronous wheel.
The utility model discloses still to the improvement method who has the problem now:
1. on the premise of ensuring the rigidity, strength and a certain life of the landing gear structure, it is required to ensure the lightest mass.
2. Have the commonality to the light small-size unmanned aerial vehicle of majority, an undercarriage can be installed in a plurality of unmanned aerial vehicle belows
3. The flying process accords with the aerodynamics and reduces the flying resistance as much as possible
4. Has workability while reducing cost as much as possible while satisfying the requirements.
5. Absorbing certain energy and bearing during taking off and landing;
6. ease of use and maintenance, ease of inspection, repair and replacement, and life expectancy; moreover, the landing gear should also satisfy the requirements relating to its own function:
7. shock absorption requires that the landing gear have good absorption and dissipation of impact loads and energy.
8. The storage requirement is that during stowage and release, a reliable locking device is required, the storage space is as small as possible, and the retraction mechanism is uniformly stressed.
9. Protection requirements in certain temperature, humidity, vibration, dust, salt spray and other environments require good sealing and corrosion resistance.
Further, for the sake of reasonableness, the rack 1 comprises two side plates 12 and a transverse plate 13 connected to the lower parts of the two side plates, wherein a slot 14 is formed in the transverse plate 13, the slot 14 is used for penetrating through the threaded sleeve 8, and the threaded sleeve 8 is limited in the slot 14 to slide; two side plates 12, namely two side plate bodies, wherein each side plate body comprises two rectangular plates 19 arranged in parallel, through holes are arranged on the rectangular plates at the same horizontal position, flange plates 20 are fixedly arranged on the opposite surfaces of the rectangular plates, flanges 21 coaxial with the through holes are arranged on the screw rod between the two rectangular plates, and the flanges are limited between the rectangular plates so as to ensure that the screw rod cannot axially move; the slot 14 is a rectangular slot, and the width of the slot is substantially consistent with the width of the lower part of the screw sleeve 8, so that the screw sleeve 8 is limited to slide in the rectangular slot.
Furthermore, the screw sleeve 8 comprises a screw hole 15 which is arranged on the upper part and is in threaded fit with the screw thread, and protruding lug pieces 16 for hinge joint are arranged on two sides of the lower part, the upper part of the screw sleeve 8 is a first rectangular body, the lower part of the screw sleeve is also a second rectangular body, two side surfaces of the second rectangular body are in fit with the inner side surface of the rectangular groove for limiting sliding, and the two protruding lug pieces 16 are arranged on the lower part of the second rectangular body.
Further, the swing frame 9 is a square steel pipe, i.e. a first square steel pipe, the telescopic supporting legs 10 are also square steel pipes, i.e. a second square steel pipe, the outer dimension of the second square steel pipe of the telescopic supporting legs 10 is equal to the inner dimension of the first square steel pipe of the swing frame 9, so as to realize sleeve-connection, telescopic matching and sliding, the two ends of the upper part of the first square steel pipe are hinged between the two lug pieces 16, the first side part a of the first square steel pipe is hinged with the first end of the first electric pushing cylinder 17, and the first side part of the screw sleeve 8 is hinged with the second end of the first electric pushing cylinder 17, so as to realize swing of the swing frame 9 when the first electric pushing cylinder is telescopic 17.
Further, the second side B of the square steel tube is hinged to the upper end of the second electric pushing cylinder 18, and the second side of the telescopic supporting foot 10 is hinged to the second end of the second electric pushing cylinder 18, so as to realize the lifting of the telescopic supporting foot.
The utility model discloses a light and small unmanned aerial vehicle skid undercarriage structure's working method, light and small unmanned aerial vehicle skid undercarriage structure includes the frame of establishing in light and small unmanned aerial vehicle lower part and articulates two parallel lead screws in the frame body, is first lead screw and second lead screw respectively, and the middle part of two lead screws is equipped with synchronous sprocket respectively, is connected with synchronous chain on the synchronous sprocket of two lead screws, be equipped with the motor in the frame and be used for making the first chain drive mechanism of first lead screw rotation by motor drive; two sides of a synchronous chain wheel of each parallel screw rod are provided with screw threads which are opposite in spiral direction, the screw threads are connected with screw sleeves in a threaded manner, the lower parts of the screw sleeves are hinged with a swing frame and telescopic supporting legs arranged on the swing frame, and the lower end parts of the telescopic supporting legs positioned on the same side are connected with a skid plate; when the light and small unmanned aerial vehicle is parked on the ground, the swing frame and the telescopic supporting legs are perpendicular to the ground, and when the distance between the swing frames at two sides needs to be adjusted, the motor drives the first chain transmission mechanism to act, so that the first screw rod drives the second screw rod to synchronously rotate through the synchronous chain, the screw rod drives the screw sleeve on the screw rod to be relatively close to or relatively far away from, and the length of the telescopic supporting legs can be adjusted to change the distance between the frame and the skid plate; after the light unmanned aerial vehicle takes off, the swinging brackets and the telescopic supporting legs on the two sides are folded and close to the bottom surface of the frame.
Furthermore, the swing frame is a square steel pipe, two ends of the upper part of the square steel pipe are hinged between the two lug plates, the first side part of the square steel is hinged with the first end of the first electric pushing cylinder, and the first side part of the threaded sleeve is hinged with the second end of the first electric pushing cylinder, so that the swing frame can swing when the first electric pushing cylinder stretches; the second side part of the square steel pipe is hinged with the upper end of the second electric pushing cylinder, and the second side part of the telescopic supporting leg is hinged with the second end of the second electric pushing cylinder so as to realize the lifting of the telescopic supporting leg; the first electric pushing cylinder is driven to stretch, so that the upper part of the square steel pipe swings around a hinge point, and the swinging brackets and the telescopic supporting legs on the two sides are folded and close to the bottom surface of the rack; and the second electric pushing cylinder is driven to extend or shorten the telescopic supporting legs relative to the square steel pipe, so that the distance between the rack and the skid plate is changed.
Some technical features of the invention:
the skid plate moves horizontally left and right: the screw rod is driven to rotate by the motor, the slide sled plate is driven to move left and right by the screw rod driving belt, the forward and reverse rotation of the motor is controlled so as to control the left and right retraction of the slide sled plate, the retraction of the slide sled plate is controlled according to the actual working condition requirement,
expansion of the skid plate: the sliding pry plate is controlled to move up and down through the extension and retraction of the second electric push rod, so that the unmanned aerial vehicle can be parked in different environments;
folding and unfolding of the skid plate: when the unmanned aerial vehicle is in a flying state, the device can influence the flight of the unmanned aerial vehicle, so that the parking equipment is designed into a retractable structure to reduce air resistance.
1. According to the requirements of ensuring rigidity and light weight of the landing gear, Q235 carbon steel is selected as the main material of the landing gear. The Q235 steel has slightly high carbon mass fraction, high strength, and good plasticity and toughness. Materials for the housing and landing pads are suitable.
2. According to the demand that has the commonality to most light unmanned aerial vehicle, design undercarriage shell wholly for the edge slot type. The undercarriage assembly need open corresponding groove and hole in the unmanned aerial vehicle bottom, with the undercarriage whole insert the unmanned aerial vehicle bottom and press from both sides the bearing end cover through bolted connection tightly, make the undercarriage inlay in unmanned aerial vehicle bottom and guarantee to have good stability. The significance of design like this lies in that direct undercarriage installs the impact load that can greatly increased unmanned aerial vehicle receive when descending in unmanned aerial vehicle bottom, can make the whole focus of unmanned aerial vehicle rise moreover and cause the result of descending unstability even turning on one's side.
3. According to the demand that accords with aerodynamics among the flight process, the supporting leg can be folded when unmanned aerial vehicle takes off with the landing gear design, makes unmanned aerial vehicle flight resistance greatly reduced. The significance of design like this lies in reducing the volume of undercarriage in the flight process, and the volume that exposes in the air is big more, and the windage that receives in the unmanned aerial vehicle flight is big more.
4. According to the requirement of machinability, all parts used on the landing gear are designed to be machined in batches in a workshop, bolts and nuts are purchased according to national standard regulations, and a stepping motor for controlling the folding telescopic electric push rod and the rotation of the screw rod can also be purchased in the market according to requirements.
5. According to the requirement that the landing and taking-off can bear certain energy load, a proper shock absorber is selected to be arranged on the supporting leg. The size of the shock absorber should not be too large, otherwise the weight is increased to influence the flying speed.
6. According to the requirements of easy use and maintenance and the like, the mode that the motor drives the screw to drive is designed into chain transmission, and the chain transmission does not need to be frequently replaced because the chain transmission cannot keep a tensioning state under the condition that the stepping motor does not work.
The utility model discloses light and small unmanned aerial vehicle skid undercarriage is simple structure, low in processing cost, and low in maintenance requirement, and this undercarriage adopts square steel pipe, scalable supporting legs (interior steel tubular product) and second electric propulsion jar as buffering and bearing structure, and the skid plate contact ground below the scalable supporting legs, improves the stability of landing, but the flexible ski design of retractable ski can help light and small unmanned aerial vehicle make unmanned aerial vehicle (such as weeds, clay) set up organism itself on the abominable ground of environment through the flexible mode of undercarriage, make the organism avoid the paddle to rotate and blow the debris interference that flies, in addition the folding of pendulum revolving rack makes unmanned aerial vehicle also can not receive extra air resistance influence continuation of endurance when flying; the swing rotary frames controlled by the screw transmission move in the opposite direction or in the opposite direction synchronously to change the wheelbase to adapt to different types of unmanned aerial vehicles and different use sites.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (5)
1. The utility model provides a light small-size unmanned aerial vehicle skid undercarriage structure which characterized in that: the automatic transmission mechanism comprises a rack arranged at the lower part of the small light unmanned aerial vehicle and two parallel screw rods hinged in the rack body, namely a first screw rod and a second screw rod, wherein the middle parts of the two screw rods are respectively provided with a synchronous chain wheel; the two sides of the synchronous chain wheel of each parallel screw rod are provided with screw threads in opposite directions, the screw threads are connected with screw sleeves in a screwed mode, the lower portions of the screw sleeves are hinged with a swing frame and telescopic supporting legs arranged on the swing frame, and the lower end portions of the telescopic supporting legs located on the same side are connected with a skid plate.
2. The light drone sled landing gear structure of claim 1, wherein: the frame includes both sides board and connects the diaphragm in both sides board lower part, be equipped with the fluting on the diaphragm, the fluting is used for passing the swivel nut, the swivel nut is spacing to slide in the fluting.
3. The light drone sled landing gear structure of claim 1, wherein: the threaded sleeve comprises a screw hole which is matched with the thread at the upper part and is in threaded connection with the thread, and lug plates for hinging are arranged at two sides of the lower part.
4. A skid landing gear structure for light and small unmanned aerial vehicles according to claim 3, wherein: the swing frame is a square steel pipe, two ends of the upper portion of the square steel pipe are hinged between the two lug pieces, the first side portion of the square steel is hinged to the first end of the first electric pushing cylinder, and the first side portion of the threaded sleeve is hinged to the second end of the first electric pushing cylinder, so that swing of the swing frame is achieved when the first electric pushing cylinder stretches out and draws back.
5. The light drone sled landing gear structure of claim 4, wherein: the second side of the square steel pipe is hinged to the upper end of the second electric pushing cylinder, and the second side of the telescopic supporting leg is hinged to the second end of the second electric pushing cylinder so as to realize the lifting of the telescopic supporting leg.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921264237.5U CN210503162U (en) | 2019-08-06 | 2019-08-06 | Light small-size unmanned aerial vehicle skid formula undercarriage structure |
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| CN201921264237.5U CN210503162U (en) | 2019-08-06 | 2019-08-06 | Light small-size unmanned aerial vehicle skid formula undercarriage structure |
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| CN210503162U true CN210503162U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304240A (en) * | 2019-08-06 | 2019-10-08 | 厦门大学嘉庚学院 | A kind of small-sized unmanned plane skid landing gear structure and its working method |
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2019
- 2019-08-06 CN CN201921264237.5U patent/CN210503162U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304240A (en) * | 2019-08-06 | 2019-10-08 | 厦门大学嘉庚学院 | A kind of small-sized unmanned plane skid landing gear structure and its working method |
| CN110304240B (en) * | 2019-08-06 | 2024-01-09 | 厦门大学嘉庚学院 | Skid-type landing gear structure of light and small unmanned aerial vehicle and working method of skid-type landing gear structure |
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