Pulley bracket integrated device for UAV ejection

Abstract

The present invention discloses a pulley bracket integrated device for ejecting a drone, comprising an ejection pulley and an ejection bracket. The ejection pulley comprises a pulley table, a pulley left side plate, and a pulley right side plate. The left end of the pulley table is fixedly connected to the upper end of the pulley left side plate, and the right end is fixedly connected to the upper end of the pulley right side plate. The ejection bracket is fixed on the pulley table. The ejection pulley also comprises an angle adjustment mechanism and a roller assembly. The roller assembly is rotatably connected to the pulley left side plate and the pulley right side plate via the angle adjustment mechanism. The present invention has the advantages of simple and compact structure, strong load-bearing capacity, and not easy to be damaged.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicle ejection, in particular to a pulley bracket integrated device for unmanned aerial vehicle ejection. Background Art

[0002] At present, domestic drone launch devices use rubber band catapults, steam hydraulic catapults and electromagnetic catapults. Small drones mostly use rubber band catapults, while medium-sized drones mostly use steam and electromagnetic catapults. Different pulley bracket devices are derived for the ejection of drones of different weights. This device can carry the drone and accelerate it in the track. At the same time, the drone can be quickly released after reaching the required take-off speed at the end of the track. Since drones of different weights are subject to different acceleration loads, the device is required to withstand greater impact forces.

[0003] The pulley bracket device used in the prior art includes a catapult pulley and a catapult bracket. The catapult bracket is fixed on the catapult pulley and is used to carry a drone. The catapult pulley is provided with a row of roller shafts on the left and right sides of the pulley frame, respectively. One end of the roller shaft is fixedly connected to the catapult pulley frame, and the other end is sleeved with the roller; the catapult bracket includes a left side plate of the bracket, a right side plate of the bracket, a bottom plate of the bracket, and a slide bracket. The left end of the bottom plate of the bracket is fixedly connected to the lower end of the left side plate of the bracket, and the right end of the bottom plate of the bracket is fixedly connected to the right side plate of the bracket. The lower end of the bracket is fixedly connected, the upper end of the left side plate of the bracket and the upper end of the right side plate of the bracket are fixedly connected with a slide bracket, and the slide bracket is provided with a slide groove opening forward. When in use, first insert the pin shaft on the lower bracket of the drone into the slide groove to fix the drone on the pulley bracket device, start the drone and drive the ejection pulley along the track through ejection devices such as rubber bands, steam hydraulics, and electromagnetic force. After reaching the take-off speed of the drone, brake, and the ejection pulley brakes at the moment, and the drone is separated from the pulley bracket device.

[0004] The shortcomings of the existing structure are as follows: first, the track for the take-off of the UAV has a certain inclination angle with the horizontal plane. The existing technology arranges a row of roller shafts on both sides of the pulley frame and is fixedly connected to the pulley frame. The rollers roll around the shafts. Due to processing and installation, the rollers are not absolutely parallel to the track. When the pulley moves along the track, a row of rollers cannot be guaranteed to contact the track at the same time, and uneven force is easily applied to the rollers, which affects the service life of the rollers; second, because the pulley bracket is relatively heavy, the pulley rollers are subjected to a large load at the moment of acceleration and during the gliding process, and the rollers are unevenly stressed, which is easy to wear or damage, so that the frequency of roller replacement increases, affecting the use of the pulley bracket integrated device and increasing the maintenance cost of the device; third, the pulley bracket used in the existing technology is relatively heavy, and it takes a lot of energy to accelerate the UAV to the take-off speed when the UAV is moving on the track, which affects the energy utilization rate of the launch system. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art and to provide a pulley bracket integrated device for launching a UAV which has a simple and compact structure, a strong load-bearing capacity and is not easily damaged.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A pulley bracket integrated device for unmanned aerial vehicle ejection, comprising an ejection pulley and an ejection bracket, the ejection pulley comprising a pulley table, a pulley left side plate, and a pulley right side plate, the pulley table left end is fixedly connected to the upper end of the pulley left side plate, and the right end is fixedly connected to the upper end of the pulley right side plate, the ejection bracket is fixed on the pulley table, and is characterized in that: the ejection pulley also includes an angle adjustment mechanism and a roller assembly, the roller assembly is rotatably connected to the pulley left side plate and the pulley right side plate through the angle adjustment mechanism, so that the angle of the roller assembly can be adjusted under the action of the angle adjustment mechanism, ensuring that each roller is evenly stressed and not overloaded, thereby increasing the service life of the roller.

[0008] The roller assembly described in the present invention includes a roller shaft, a roller, and a first shaft retaining ring. The angle adjustment mechanism includes a roller support frame, a support shaft, a self-locking nut, and a fixed bushing. One side of the roller support frame is fixedly connected with at least two roller shafts at equal intervals along its length direction, and the middle part of the other side is fixedly connected with a support shaft. The roller is rotatably sleeved on the roller shaft and is clamped and limited by the first shaft retaining ring. The front and rear ends of the left side plate of the pulley and the right side plate of the pulley are respectively symmetrically provided with first shaft holes, and the fixed bushing is fixed in the first shaft hole. The support shaft passes through the fixed bushing and is threadedly connected to the self-locking nut. The support shaft and the fixed bushing are rotatably connected, so that the roller support frame can swing up and down slightly under harsh working conditions, and each roller is evenly stressed without unbalanced load, thereby improving the service life.

[0009] The ejection bracket described in the present invention comprises a left side plate of a bracket, a right side plate of a bracket, a front connecting rod of a bracket, a rear connecting rod of a bracket, and a slide bracket, the left end of the front connecting rod of the bracket is fixedly connected to the front side of the lower end of the left side plate of the bracket, and the right end is fixedly connected to the front side of the lower end of the right side plate of the bracket, the left end of the rear connecting rod of the bracket is fixedly connected to the rear side of the lower end of the left side plate of the bracket, and the right end is fixedly connected to the rear side of the lower end of the right side plate of the bracket, the overall shape of the ejection bracket is U-shaped, the front connecting rod of the bracket and the rear connecting rod of the bracket are fixedly connected to the pulley table, the upper ends of the left side plate of the bracket and the right side plate of the bracket are respectively fixedly connected to the lower end of the slide bracket, and the upper end of the slide bracket is provided with a slide opening forward, and the left side plate and the right side plate of the bracket are supported by arranging a connecting rod to reduce the weight of the ejection bracket itself.

[0010] The left side plate and the right side plate of the bracket described in the present invention are trapezoidal structures that are narrow at the top and wide at the bottom, and are hollowed out in the middle. They are arranged in a trapezoidal structure to ensure the stability of the left side plate and the right side plate of the bracket, and can withstand large overloads during the launch process. They are not easily deformed, and the hollowing out of the middle can reduce the weight of the ejection bracket itself.

[0011] The front connecting rod and the rear connecting rod of the bracket described in the present invention adopt a round tube structure, which is arranged to have good torsion resistance, can withstand a large overload, and can reduce the sliding resistance during the movement of the pulley bracket integrated device.

[0012] The ejection pulley described in the present invention also includes a traction mechanism, which includes a traction left side plate, a traction right side plate, a traction shaft, and a second shaft retaining ring. The traction left side plate and the traction right side plate are located between the pulley left side plate and the pulley right side plate. The upper ends of the traction left side plate and the upper ends of the traction right side plate are respectively fixedly connected to the pulley table. The front and rear ends of the traction left side plate and the traction right side plate are respectively symmetrically provided with second shaft holes for the traction shaft to pass through. The two ends of the traction shaft respectively pass through the symmetrically arranged second shaft holes and are clamped and limited by the second shaft retaining ring. The traction shaft is used to fix the traction rope. The acceleration and recovery of the pulley bracket integrated device in the track are achieved by dragging the traction rope.

[0013] The ejection pulley of the present invention also includes a pulley guide mechanism, which includes a guide wheel, a guide wheel shaft, a retaining ring for a third shaft, a limit plate, and a limit nut. A plurality of long holes are symmetrically provided on the left and right sides of the pulley table. The guide wheel is provided below the long hole of the pulley table. The guide wheel can be rotatably sleeved on the lower end of the guide wheel shaft and is clamped and limited by the retaining ring for the third shaft. The upper end of the guide wheel shaft passes through the long hole. The guide wheel shaft is provided with a shaft shoulder. The upper end surface of the shaft shoulder contacts the lower end surface of the pulley table. One side of the guide wheel shaft An opening is provided, and the limit plate is provided at the upper end of the long hole on the pulley table and is provided with a limit groove matching the opening on the guide wheel shaft. The limit plate is fixedly connected to the pulley table, and the upper end of the guide wheel shaft is threadedly connected to the limit nut. The guide wheel is made to contact the edge of the track by adjusting the position of the guide wheel, and the rotation of the guide wheel shaft is limited by the contact between the limit groove of the limit plate and the opening of the guide wheel shaft, thereby realizing reliable limiting. During operation, the guiding effect of the guide wheel ensures that the pulley is always in the middle of the guide rail during operation, ensuring that the pulley accelerates in a straight line and smoothly.

[0014] The slide bracket of the present invention comprises a front left slide bracket, a front right slide bracket, a rear left slide bracket, and a rear right slide bracket, the front left slide bracket is arranged at the front end of the left side plate of the bracket, and the front right slide bracket is arranged at the front end of the right side plate of the bracket, the front left slide bracket is symmetrically arranged parallel to the front right slide bracket, the rear left slide bracket is arranged at the rear end of the left side plate of the bracket, and the rear right slide bracket is arranged at the rear end of the right side plate of the bracket, the rear left slide bracket is symmetrically arranged parallel to the rear right slide bracket, the front left slide bracket is fixedly connected to the outer side of the upper end of the left side plate of the bracket, the rear left slide bracket is fixedly connected to the inner side of the upper end of the left side plate of the bracket, the front right slide bracket is fixedly connected to the outer side of the upper end of the right side plate of the bracket, and the rear right slide bracket is fixedly connected to the inner side of the upper end of the right side plate of the bracket, so that when the drone is disengaged from the slide bracket, the lower bracket at the rear side of the drone will not hit the front left slide bracket and the front right slide bracket, and will not affect the take-off of the drone.

[0015] The front left slide bracket, the front right slide bracket, the rear left slide bracket and the rear right slide bracket of the present invention are respectively provided with shear pin holes, and the shear pins pass through the shear pin holes on the lower bracket of the aircraft and the slide bracket. By using the shear pins to fix the slide bracket to the lower bracket of the aircraft, it can be ensured that the UAV will not shake or accidentally fall off the slide bracket during acceleration, until the braking moment, the shear pin breaks, and the UAV is separated from the slide bracket for takeoff.

[0016] The ejection pulley and ejection bracket of the present invention are made of aluminum alloy to meet the lightweight design and improve the energy utilization rate of the launching system.

[0017] The beneficial effects of the present invention are as follows: by arranging the roller assembly, it can be ensured that each roller support frame can swing up and down slightly under harsh working conditions, each roller is evenly stressed and not overloaded, thereby improving the service life; by arranging the pulley guide mechanism, the pulley is always in the middle of the guide rail during operation, thereby ensuring that the pulley accelerates in a straight line and smoothly; by arranging the left side plate and the right side plate of the bracket into a trapezoidal structure, the stability of the left side plate and the right side plate of the bracket is ensured, and the large overload during the launch process can be withstood and it is not easy to deform; the middle part of the left side plate and the right side plate of the bracket is hollowed out, thereby reducing the weight of the ejection bracket itself; the front connecting rod and the rear connecting rod of the bracket adopt a round tube structure, which has good torsion resistance, can withstand large overloads, and can reduce sliding resistance; the structure of the slide bracket is set so that when the drone is detached from the slide bracket, the lower bracket on the rear side of the drone will not touch the front left slide bracket and the front right slide bracket, thereby not affecting the take-off of the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is the front view of the present invention.

[0020] Figure 3 It is a top view of the present invention.

[0021] Figure 4 It is a side view of the present invention.

[0022] Figure 5 It is the front view of the ejection pulley of the present invention.

[0023] Figure 6 It is a top view of the ejection pulley of the present invention.

[0024] Figure 7 yes Figure 5 AA section view.

[0025] Figure 8 yes Figure 6 Partial cross-sectional view of BB.

[0026] Fig. 9 It is a structural schematic diagram of a roller support frame.

[0027] Fig.10 It is a schematic diagram of the guide wheel shaft structure.

[0028] Fig.11 It is a front view of the present invention connected to a drone.

[0029] Fig.12 It is a side view of the present invention connected to a drone (including the track device).

[0030] Fig.13 yes Fig.11 A partial view of the .

[0031] Figure numerals: ejection pulley-1, pulley table-101, pulley left side plate-102, pulley right side plate-103, roller support frame-104, roller shaft-105, roller-106, first shaft retaining ring-107, bracket shaft-108, self-locking nut-109, fixed bushing-110, ejection bracket-2, bracket left side plate-201, bracket right side plate-202, bracket front connecting rod-203, bracket rear connecting rod-204, slide bracket-205, front left slide bracket-2051, front right slide bracket-2052, rear left slide bracket-2053, rear Right slide bracket-2054, slide-206, shear pin hole-207, traction mechanism-3, traction left side plate-301, traction right side plate-302, traction shaft-303, retaining ring for second shaft-304, pulley guide mechanism-4, guide wheel-401, guide wheel shaft-402, shoulder-403, retaining ring for third shaft-404, limit plate-405, limit nut-406, long hole-407, brake plate-5, UAV lower bracket-6, pin shaft-601, cotter pin-602, shear pin-603, UAV-7, track-8, fixing bolt-9. DETAILED DESCRIPTION

[0032] The present invention is described below in conjunction with the accompanying drawings and embodiments.

[0033] like Figure 4 , Figure 5 , Figure 7 , Fig. 9 As shown, a pulley bracket integrated device for unmanned aerial vehicle ejection includes an ejection pulley 1 and an ejection bracket 2. The ejection pulley includes a pulley table 101, a pulley left side plate 102, and a pulley right side plate 103. The left end of the pulley table 101 is fixedly connected to the upper end of the pulley left side plate 102, and the right end is fixedly connected to the upper end of the pulley right side plate 103. In this embodiment, the pulley table is fixed to the pulley left side plate and the pulley right side plate by welding, and can also be connected by bolts or the like. The ejection bracket 2 is fixed on the pulley table 101. The ejection pulley also includes an angle adjustment mechanism and a roller assembly. The roller assembly is rotatably connected to the pulley left side plate and the pulley right side plate via the angle adjustment mechanism, so that the angle of the roller assembly can be adjusted under the action of the angle adjustment mechanism to ensure that each roller is evenly stressed and not overloaded, thereby improving the service life of the roller.

[0034] The roller assembly includes a roller shaft 105, a roller 106, and a first shaft retaining ring 107. The angle adjustment mechanism includes a roller support frame 104, a support shaft 108, a self-locking nut 109, and a fixed bushing 110. At least two roller shafts 105 are fixedly connected to one side of the roller support frame 104 at equal intervals along its length direction, and a support shaft 108 is fixedly connected to the middle of the other side. The roller 106 is rotatably sleeved on the roller shaft 105 and is clamped and limited by the first shaft retaining ring 107. The front and rear ends of the left side plate 102 of the pulley and the right side plate 103 of the pulley are respectively symmetrically provided with first shaft holes, and the fixed bushing 110 is fixed in the first shaft hole. The support shaft 108 passes through the fixed bushing 110 and is threadedly connected to the self-locking nut 109. The support shaft 108 is rotatably connected to the fixed bushing 110, so that the roller support frame can swing up and down slightly under harsh working conditions, and each roller is evenly stressed without unbalanced load, thereby improving the service life. In this embodiment, roller assemblies are symmetrically arranged at the front and rear ends of the left side plate and the right side plate of the pulley. Each roller assembly is provided with four rollers. The rollers have their own bearings, and the rollers can also be connected to the roller shafts via the bearings. The number of rollers and roller shafts is determined according to actual needs. In this embodiment, the roller support frame, the roller shaft, and the bracket shaft are all fixed by welding.

[0035] like Figure 3As shown, the ejection bracket 2 includes a bracket left side plate 201, a bracket right side plate 202, a bracket front connecting rod 203, a bracket rear connecting rod 204, and a slide bracket 205. The left end of the bracket front connecting rod 203 is fixedly connected to the front side of the lower end of the bracket left side plate 201, and the right end is fixedly connected to the front side of the lower end of the bracket right side plate 202. The left end of the bracket rear connecting rod 204 is fixedly connected to the rear side of the lower end of the bracket left side plate 201, and the right end is fixedly connected to the lower end of the bracket right side plate 202. The ejection bracket 2 is fixedly connected to the rear end, and the overall shape of the ejection bracket 2 is U-shaped. The front connecting rod 203 of the bracket and the rear connecting rod 204 of the bracket are fixedly connected to the pulley table 101. The upper ends of the left side plate 201 of the bracket and the right side plate 202 of the bracket are respectively fixedly connected to the lower end of the slide bracket 205. The upper end of the slide bracket 205 is provided with a slide 206 opening forward. The left side plate and the right side plate of the bracket are supported by the connecting rod to reduce the weight of the ejection bracket itself. In this embodiment, the front connecting rod of the bracket, the rear connecting rod of the bracket are fixed to the left side plate and the right side plate of the bracket by welding, and the front connecting rod of the bracket, the rear connecting rod of the bracket are fixed to the pulley table by fixing bolts 9.

[0036] The left side plate 201 and the right side plate 202 of the bracket are trapezoidal structures that are narrow at the top and wide at the bottom, and are hollowed out in the middle. They are arranged in a trapezoidal structure to ensure the stability of the left side plate and the right side plate of the bracket, and can withstand large overloads during the launch process. They are not easily deformed, and the hollowing out of the middle can reduce the weight of the ejection bracket itself.

[0037] The bracket front connecting rod 203 and the bracket rear connecting rod 204 adopt a round tube structure, which is configured to have good torsion resistance, can withstand a large overload, and can reduce the sliding resistance during the movement of the pulley bracket integrated device.

[0038] like Figure 4 , Figure 7 As shown, the ejection pulley also includes a traction mechanism, the traction mechanism 3 includes a traction left side plate 301, a traction right side plate 302, a traction shaft 303, and a second shaft retaining ring 304. The traction left side plate and the traction right side plate are located between the pulley left side plate and the pulley right side plate. The upper end of the traction left side plate 301 and the upper end of the traction right side plate 302 are respectively fixedly connected to the pulley table 101. The front and rear ends of the traction left side plate 301 and the traction right side plate 302 are respectively symmetrically provided with second shaft holes for the traction shaft 303 to pass through. The two ends of the traction shaft respectively pass through the symmetrically arranged second shaft holes and are clamped and limited by the second shaft retaining ring 304. The traction shaft is used to fix the traction rope. By dragging the traction rope, the accelerated movement and recovery of the pulley bracket integrated device in the track are realized. In this embodiment, the traction left side plate and the traction right side plate are fixedly connected to the pulley table by welding, and can also be fixed by bolts or the like.

[0039] like Figure 6 , Figure 8 , Fig.10 As shown, the ejection pulley also includes a pulley guide mechanism 4, which includes a guide wheel 401, a guide wheel shaft 402, a third shaft retaining ring 404, a limit plate 405, and a limit nut 406. The pulley table 101 is symmetrically provided with a plurality of long holes 407 on the left and right sides. The guide wheel 401 is arranged below the long hole of the pulley table 101, and the guide wheel is arranged parallel to the pulley table. One side of the guide wheel is exposed outside the pulley table for contacting with the edge of the track. In this embodiment, the track is an I-shaped track. The guide wheel 401 is rotatably sleeved on the lower end of the guide wheel shaft 402 and is clamped and limited by the third shaft retaining ring 404. The upper end of the guide wheel shaft 402 passes through the long hole. There is a shoulder 403, the upper end surface of the shoulder contacts the lower end surface of the pulley table, and the shoulder is set to ensure that the guide wheel does not move up and down. An opening is provided on one side of the guide wheel shaft. The limit plate is provided at the upper end of the long hole of the pulley table and is provided with a limit groove that matches the opening on the guide wheel shaft. The limit plate 405 is fixedly connected to the pulley table 101, and the upper end of the guide wheel shaft 402 is threadedly connected with the limit nut 406. By adjusting the position of the guide wheel to make it contact with the edge of the track, and through the limit groove of the limit plate and the opening of the guide wheel shaft, the guide wheel shaft is restricted from rotating, and reliable limit is achieved. During operation, through the guiding effect of the guide wheel, the pulley operation process is always in the middle of the guide rail, ensuring that the pulley accelerates smoothly in a straight line. In this embodiment, long holes are symmetrically provided on both sides of the front, middle and rear ends of the pulley platform. In this embodiment, the guide wheel has its own bearing, and the guide wheel can also be sleeved with the guide wheel shaft through the bearing.

[0040] like Figure 3 , Fig.12As shown, the slide bracket 205 includes a front left slide bracket 2051, a front right slide bracket 2052, a rear left slide bracket 2053, and a rear right slide bracket 2054. The front left slide bracket 2051 is arranged at the front end of the left side plate 201 of the bracket, and the front right slide bracket 2052 is arranged at the front end of the right side plate 202 of the bracket. The front left slide bracket 2051 and the front right slide bracket 2052 are arranged parallel and symmetrically, the rear left slide bracket 2053 is arranged at the rear end of the left side plate 201 of the bracket, and the rear right slide bracket 2054 is arranged at the rear end of the right side plate 202 of the bracket. The slot bracket 2053 is arranged parallel and symmetrically with the rear right slot bracket 2054, the front left slot bracket 2051 is fixedly connected to the outer side of the upper end of the left side plate 201 of the bracket, the rear left slot bracket 2053 is fixedly connected to the inner side of the upper end of the left side plate 201 of the bracket, the front right slot bracket 2052 is fixedly connected to the outer side of the upper end of the right side plate 202 of the bracket, and the rear right slot bracket 2054 is fixedly connected to the inner side of the upper end of the right side plate 202 of the bracket, so that when the drone is disengaged from the slot bracket, the lower bracket on the rear side of the drone will not touch the front left slot bracket and the front right slot bracket, and will not affect the take-off of the drone. In this embodiment, the front left slot bracket, the front right slot bracket and the left side plate of the bracket are fixedly connected by bolts, and the rear left slot bracket, the rear right slot bracket and the right side plate of the bracket are fixedly connected by bolts, and the slot bracket and the left side plate of the bracket and the right side plate of the bracket can also be fixed by welding or the like.

[0041] like Figure 2 , Fig.11 , Fig.13 As shown, the front left slide bracket 2051, the front right slide bracket 2052, the rear left slide bracket 2053, and the rear right slide bracket 2054 are respectively provided with shear pin holes 207, and the shear pin 603 passes through the shear pin holes on the lower bracket of the aircraft and the slide bracket. By using the shear pin to fix the slide bracket to the lower bracket of the aircraft, it can be ensured that the UAV will not shake or accidentally fall off the slide bracket during acceleration, until the braking moment, the shear pin breaks, and the UAV separates from the slide bracket and takes off.

[0042] The ejection trolley and ejection bracket are made of aluminum alloy to meet the lightweight design and improve the energy utilization rate of the launch system.

[0043] like Fig.12 As shown ( Fig.12The position of the shear pin is not marked in the figure). In this embodiment, the lower end of the drone 7 is fixedly connected to a drone lower bracket 6 that matches the slide bracket. The drone lower bracket includes a front left first vertical plate, a front left second vertical plate, a front right first vertical plate, a front right second vertical plate, a rear left first vertical plate, a rear left second vertical plate, a rear right first vertical plate, and a rear right second vertical plate. The front left first vertical plate and the front left second vertical plate penetrate the pin shaft 601 and are fixed by the cotter pin 602. The front right first vertical plate and the front right second vertical plate penetrate the pin shaft 601 and are fixed by the cotter pin 602. The rear left first vertical plate The plate and the rear left second vertical plate pass through the pin shaft 601 and are fixed by the cotter pin 602, the rear right first vertical plate and the rear right second vertical plate pass through the pin shaft 601 and are fixed by the cotter pin 602. When in use, the pin shafts of the front left first vertical plate and the front left second vertical plate are inserted into the slide groove of the front left slide groove bracket, the pin shafts of the front right first vertical plate and the front right second vertical plate are inserted into the slide groove of the front right slide groove bracket, the pin shafts of the rear left first vertical plate and the rear left second vertical plate are inserted into the slide groove of the rear left slide groove bracket, and the pin shafts of the rear right first vertical plate and the rear right second vertical plate are inserted into the slide groove of the rear right slide groove bracket.

[0044] like Figure 1 , Figure 7 As shown, in this embodiment, a brake plate 5 is further provided below the ejection pulley, and the brake plate 5 is fixedly connected to the ejection pulley, and in this embodiment, the connection is made by welding. When the ejection pulley drives the UAV to slide on the track 8, the brake is applied by the brake plate. At the moment of braking, the lower bracket of the UAV smoothly escapes from the chute of the chute support plate, and the UAV takes off reliably and smoothly. There are many ways to brake the ejection pulley. In this embodiment, the brake plate is used for braking, and blocking braking and other methods can also be used.

[0045] When installing the present invention, firstly, the ejection bracket is fixed on the ejection pulley by fixing bolts, and then the left and right spacing of the ejection pulley on the inner side of the track is adjusted. After the position is determined, the position of the guide wheel is adjusted so that the guide wheel contacts the edge of the track, and the end face of the limit plate limit groove is brought into contact with the opening of the guide wheel shaft to limit the rotation of the guide wheel shaft, and the limit nut is tightened. If the position of the limit plate limit groove and the opening of the guide wheel shaft cannot be reliably matched, the contact surface between the limit groove and the guide wheel shaft can be milled flat. During gliding, the guide action of the guide wheel makes the pulley always stay in the middle of the track during operation, ensuring that the ejection pulley accelerates smoothly and linearly. After the position of the ejection pulley is adjusted, the pin shaft of the lower bracket of the drone is inserted into the slide groove through the notch of the slide groove, and the shear pin is inserted through the shear pin hole on the lower bracket of the drone and the shear pin hole on the slide groove support plate to prevent the drone from shaking or accidentally disengaging the slide groove support plate during acceleration.

[0046] When the present invention is used, the engine of the drone is started, the engine generates thrust, the drone tends to move forward, and the ejection device such as rubber band, steam hydraulic pressure, electromagnetic force, etc. drives the traction rope on the traction shaft to pull the ejection pulley to accelerate along the track. At the end of the ejection track, the drone obtains a certain take-off speed, the brake plate brakes, and the shear pin breaks at the moment of braking. The lower bracket of the drone is separated from the slide plate and takes off successfully. After the drone takes off, the ejection pulley and the ejection bracket are recovered by pulling the traction rope at the rear end of the ejection pulley.

[0047] The beneficial effects of the present invention are as follows: by arranging the roller assembly, it can be ensured that each roller support frame can swing up and down slightly under harsh working conditions, each roller is evenly stressed and not overloaded, thereby improving the service life; by arranging the pulley guide mechanism, the pulley is always in the middle of the guide rail during operation, thereby ensuring that the pulley accelerates in a straight line and smoothly; by arranging the left side plate and the right side plate of the bracket into a trapezoidal structure, the stability of the left side plate and the right side plate of the bracket is ensured, and the large overload during the launch process can be withstood and it is not easy to deform; the middle part of the left side plate and the right side plate of the bracket is hollowed out, thereby reducing the weight of the ejection bracket itself; the front connecting rod and the rear connecting rod of the bracket adopt a round tube structure, which has good torsion resistance, can withstand large overloads, and can reduce sliding resistance; the structure of the slide bracket is set so that when the drone is detached from the slide bracket, the lower bracket on the rear side of the drone will not touch the front left slide bracket and the front right slide bracket, thereby not affecting the take-off of the drone.

Claims

1. A pulley bracket integrated device for ejecting a drone, comprising an ejection pulley and an ejection bracket, wherein the ejection pulley comprises a pulley table, a pulley left side plate, and a pulley right side plate, wherein the pulley table has a left end fixedly connected to an upper end of the pulley left side plate, and a right end fixedly connected to an upper end of the pulley right side plate, and the ejection bracket is fixed to the pulley table, characterized in that: The ejection pulley further comprises an angle adjustment mechanism, a roller assembly and a traction mechanism, wherein the roller assembly is rotatably connected to the left side plate of the pulley and the right side plate of the pulley via the angle adjustment mechanism; The roller assembly includes a roller shaft, a roller, and a first shaft retaining ring. The angle adjustment mechanism includes a roller support frame, a support shaft, a self-locking nut, and a fixed bushing. At least two roller shafts are fixedly connected to one side of the roller support frame at equal intervals along its length direction, and a support shaft is fixedly connected to the middle of the other side. The roller is rotatably sleeved on the roller shaft and is clamped and limited by the first shaft retaining ring. The front and rear ends of the left side plate of the pulley and the right side plate of the pulley are respectively symmetrically provided with first shaft holes, the fixed bushing is fixed in the first shaft hole, the support shaft passes through the fixed bushing and is threadedly connected to the self-locking nut, and the support shaft is rotatably connected to the fixed bushing. The traction mechanism includes a traction left side plate, a traction right side plate, and a traction shaft. The traction left side plate and the traction right side plate are located between the pulley left side plate and the pulley right side plate. The upper ends of the traction left side plate and the traction right side plate are respectively fixedly connected to the pulley table. The traction left side plate and the traction right side plate are symmetrically provided with second shaft holes for the traction shaft to pass through, and both ends of the traction shaft respectively pass through the symmetrically arranged second shaft holes.

2. The pulley bracket integrated device for launching a UAV according to claim 1, characterized in that: The ejection bracket includes a left side plate of the bracket, a right side plate of the bracket, a front connecting rod of the bracket, a rear connecting rod of the bracket, and a slide bracket. The left end of the front connecting rod of the bracket is fixedly connected to the front side of the lower end of the left side plate of the bracket, and the right end is fixedly connected to the front side of the lower end of the right side plate of the bracket. The left end of the rear connecting rod of the bracket is fixedly connected to the rear side of the lower end of the left side plate of the bracket, and the right end is fixedly connected to the rear side of the lower end of the right side plate of the bracket. The overall shape of the ejection bracket is U-shaped, the front connecting rod of the bracket and the rear connecting rod of the bracket are fixedly connected to the pulley table, the upper ends of the left side plate of the bracket and the right side plate of the bracket are respectively fixedly connected to the lower end of the slide bracket, and the upper end of the slide bracket is provided with a slide opening forward.

3. The pulley bracket integrated device for launching a drone according to claim 2, characterized in that: The left side plate of the bracket and the right side plate of the bracket are trapezoidal structures that are narrow at the top and wide at the bottom, and the middle part is hollow.

4. A pulley bracket integrated device for ejection of a UAV according to claim 2 or 3, characterized in that: The front connecting rod of the bracket and the rear connecting rod of the bracket adopt a round tube structure.

5. The pulley bracket integrated device for launching a UAV according to claim 2, characterized in that: The traction mechanism also includes a second shaft retaining ring. The front and rear ends of the traction left plate and the traction right plate are symmetrically provided with second shaft holes for the traction shaft to pass through. The two ends of the traction shaft pass through the symmetrically arranged second shaft holes and are clamped and limited by the second shaft retaining ring.

6. A pulley bracket integrated device for launching a drone according to claim 1, 2, 3 or 5, characterized in that: The ejection pulley also includes a pulley guide mechanism, the pulley guide mechanism includes a guide wheel, a guide wheel shaft, a retaining ring for the third shaft, a limit plate, and a limit nut. A plurality of long holes are symmetrically provided on the left and right sides of the pulley table. The guide wheel is arranged below the long hole of the pulley table. The guide wheel can be rotatably sleeved on the lower end of the guide wheel shaft and is limited by the retaining ring for the third shaft. The upper end of the guide wheel shaft passes through the long hole. The guide wheel shaft is provided with a shoulder. The upper end surface of the shoulder contacts with the lower end surface of the pulley table. One side of the guide wheel shaft is provided with an opening. The limit plate is provided at the upper end of the long hole of the pulley table and is provided with a limit groove matching the opening on the guide wheel shaft. The limit plate is fixedly connected to the pulley table, and the upper end of the guide wheel shaft is threadedly connected to the limit nut.

7. The pulley bracket integrated device for launching a UAV according to claim 2 or 3, characterized in that: The slide slot bracket comprises a front left slide slot bracket, a front right slide slot bracket, a rear left slide slot bracket, and a rear right slide slot bracket, the front left slide slot bracket is arranged at the front end of the left side plate of the bracket, the front right slide slot bracket is arranged at the front end of the right side plate of the bracket, the front left slide slot bracket is arranged parallel and symmetrically with the front right slide slot bracket, the rear left slide slot bracket is arranged at the rear end of the left side plate of the bracket, the rear right slide slot bracket is arranged parallel and symmetrically with the rear right slide slot bracket, the front left slide slot bracket is fixedly connected to the outer side of the upper end of the left side plate of the bracket, the rear left slide slot bracket is fixedly connected to the inner side of the upper end of the left side plate of the bracket, the front right slide slot bracket is fixedly connected to the outer side of the upper end of the right side plate of the bracket, and the rear right slide slot bracket is fixedly connected to the inner side of the upper end of the right side plate of the bracket.

8. The pulley bracket integrated device for launching a UAV according to claim 7, characterized in that: The front left slide slot bracket, the front right slide slot bracket, the rear left slide slot bracket, and the rear right slide slot bracket are respectively provided with shear pin holes.

9. A pulley bracket integrated device for launching a drone according to claim 1, 2, 3, 5 or 8, characterized in that: The ejection pulley and ejection bracket are made of aluminum alloy.

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