A folding robotic arm for a drone

Abstract

The utility model provides a folding mechanical arm of unmanned plane, including unmanned plane body, the outside of unmanned plane body is installed four overhanging arms, the end of overhanging arm is installed folding arm, the end of folding arm is installed fan, the outside of overhanging arm is provided with support subassembly, and support subassembly includes support rod, the top of support rod rotatory joint has rotary pad, the end of rotary pad rotatory joint has rotary shaft, the top of rotary shaft is fixedly connected with first fixed ring, and the bottom of rotary shaft is fixedly connected with disc, the outside of disc is fixed rotatory joint has rocking handle, the end of rotary pad is fixedly connected with slot block, and the inboard of slot block is inlayed with clamping sleeve, the end of overhanging arm is buried with magnetic attraction piece, through the design of support rod and rotary pad, forms rigid support structure when unfolding and effectively disperses mechanical arm load, and realizes quick fixing through magnetic attraction piece when idling, both ensure the working stability and be convenient for transportation to store.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically a foldable robotic arm for UAVs. Background Technology

[0002] With the rapid development of drone technology, foldable arm design has become an important research direction for improving the portability and transportation efficiency of drones. Traditional drone arms are mostly fixed integrated structures, resulting in a large space occupation during storage, which is not conducive to carrying and storage;

[0003] Publication number CN222310931U discloses a foldable drone, including a foldable arm assembly externally mounted on the drone body. The foldable arm assembly includes a main arm, a sub-arm at one end of the main arm, a bolt at the top of the main arm, and a second bolt inside the sub-arm. This device features a stable structure for both the main arm and the sub-arm during unfolding and folding, ensuring strong stability of the entire arm assembly. However, this patent still has the following problems in practical use:

[0004] The aforementioned devices, including most foldable robotic arm structures, all require the disassembly of the originally integrated robotic arm. Although these devices achieve folding through the hinge between the main arm and the sub-arm, they have two key technical defects: First, the load is entirely concentrated on a single pivot node, lacking a multi-stage force transmission design, which can easily lead to wear of the pivot due to long-term vibration; Second, relying solely on the mechanical fastening of bolts increases operational complexity and fails to achieve self-compensating locking under vibration conditions, affecting the stability of the main arm and sub-arm after unfolding.

[0005] A foldable robotic arm for drones is proposed to address the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a foldable robotic arm for unmanned aerial vehicles (UAVs) to solve the problems mentioned in the background art. Most foldable robotic arm structures require the disassembly of the originally integrated robotic arm. Although the above devices achieve folding through the hinge of the main arm and the sub-arm, there are two key technical defects: First, the load is completely concentrated on a single pivot node, lacking a multi-stage force transmission design, and long-term vibration can easily lead to wear of the pivot. Second, relying solely on the mechanical fastening of bolts increases the complexity of operation and cannot achieve self-compensating locking under vibration, affecting the stability of the main arm and the sub-arm after unfolding.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a folding robotic arm for drones, comprising a drone body, four cantilever arms symmetrically and fixedly connected to the outer side of the drone body, a rotating shaft rotatably connected to the end of each cantilever arm, a folding arm fixedly connected to the outer side of each rotating shaft, and a fan installed at the end of each folding arm;

[0008] A support assembly is provided on the outer side of the cantilever. The support assembly includes a support rod rotatably mounted on the outer side of the cantilever. A rotating pad is rotatably connected to the top of the support rod. A rotating shaft is rotatably connected to the end of the rotating pad. A first fixing ring is fixedly connected to the top of the rotating shaft. A disc is fixedly connected to the bottom of the rotating shaft. A first trapezoidal strip and a first hook are symmetrically fixedly mounted on the outer side of the first fixing ring. A second fixing ring is fixedly connected to the bottom of the cantilever. A second hook and a second trapezoidal strip are symmetrically fixedly connected to the outer side of the second fixing ring.

[0009] The disc has a rocker arm fixedly and rotatably connected to its outer side, a notched block is fixedly connected to the outer side of the end of the rotating pad, a locking sleeve is fixedly embedded in the inner side of the notched block, and the rocker arm is engaged with the locking sleeve.

[0010] The cantilever end has a magnetic absorbing plate embedded on its outer side, the adjacent surfaces of the first and second fixing rings are fixedly connected with rubber pads, and the end of the rotating shaft is provided with a locking component.

[0011] Preferably, both the second trapezoidal strip and the first trapezoidal strip are provided with a guiding slope and an extending horizontal surface.

[0012] Preferably, the first hook is engaged with the second trapezoidal strip, and the second hook is engaged with the first trapezoidal strip.

[0013] Preferably, the second trapezoidal strip is located on one side of the second hook.

[0014] Preferably, the locking assembly includes a protective shell covering the outer side of the shaft end, a cavity is formed inside one side of the shaft, a first spring is fixedly connected inside the cavity, a locking bead is fixedly connected to the movable end of the first spring, and the locking bead fits against the inner wall of the cavity.

[0015] Preferably, the protective shell has symmetrically formed locking grooves inside, and the locking grooves are engaged with locking beads.

[0016] Preferably, the magnetic sheet is magnetically connected to the support rod.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This foldable robotic arm for drones, through the design of support rods and rotating pads, forms a rigid support structure when unfolded, effectively distributing the load of the robotic arm; when idle, it is quickly fixed by magnetic plates, ensuring both operational stability and ease of transportation and storage. Its specific details are as follows:

[0018] 1. The support rod of this device, together with the folding arm and cantilever, forms a triangular support structure, which effectively distributes the load generated by the fan and the dynamic working reaction force on the rotating shaft, thereby reducing the stress concentration of the rotating shaft. Secondly, when the support rod is not in use, it is attracted by the strong magnetism of the magnetic absorbing plate, ensuring that there is no shaking or noise during transportation. At the same time, the rubber pad set on the magnetic contact surface increases the coefficient of friction and avoids direct metal collision damage.

[0019] 2. Through the spherical fit design of the locking bead and the locking groove, combined with the preload of the first spring, automatic positioning and locking can be completed quickly, allowing for rapid storage and unfolding. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the folded structure in cross-section of this utility model;

[0021] Figure 2 This is a schematic diagram of the unfolded front cross-section of the present invention;

[0022] Figure 3 This is a schematic diagram of the rotating pad and its mounting structure.

[0023] Figure 4 This is a schematic diagram of the installation structure of the first fixing ring and the second fixing ring;

[0024] Figure 5 for Figure 1 Enlarged structural diagram at point A in the middle.

[0025] In the diagram: 1. Drone body; 101. Cantilever; 102. Rotating shaft; 103. Folding arm; 104. Fan; 2. Support assembly; 201. Support rod; 202. Rotating pad; 203. Rotating shaft; 204. Disc; 205. First fixing ring; 206. First trapezoidal strip; 207. First hook; 208. Second trapezoidal strip; 209. Second hook; 210. Second fixing ring; 211. Notched block; 212. Handle; 213. Locking sleeve; 214. Magnetic suction piece; 215. Rubber pad; 3. Locking assembly; 301. Protective shell; 302. Cavity; 303. First spring; 304. Locking bead; 305. Locking slot. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 The present invention provides a technical solution: a foldable robotic arm for drones, comprising a drone body 1, four cantilever arms 101 symmetrically fixedly connected to the outer side of the drone body 1, a rotating shaft 102 rotatably connected to the end of each cantilever arm 101, a folding arm 103 fixedly connected to the outer side of the rotating shaft 102, and a fan 104 installed at the end of the folding arm 103; this structural design allows the folding arm 103 to rotate and fold around the rotating shaft 102, realizing the storage function of the robotic arm, while ensuring the stability of the fan 104 during operation.

[0028] A support assembly 2 is provided on the outer side of the cantilever 101. The support assembly 2 includes a support rod 201 rotatably mounted on the outer side of the cantilever 101. A rotating pad 202 is rotatably connected to the top of the support rod 201. A rotating shaft 203 is rotatably connected to the end of the rotating pad 202. A first fixing ring 205 is fixedly connected to the top of the rotating shaft 203. A disc 204 is fixedly connected to the bottom of the rotating shaft 203. A first trapezoidal strip 206 and a first hook 207 are symmetrically fixedly mounted on the outer side of the first fixing ring 205. A second fixing ring 210 is fixedly connected to the bottom of the cantilever 103. A second hook 209 and a second trapezoidal strip 208 are symmetrically fixedly connected to the outer side of the second fixing ring 210.

[0029] The outer side of the disc 204 is fixedly and rotatably connected to a crank handle 212, and the outer side of the end of the rotating pad 202 is fixedly connected to a notched block 211. The inner side of the notched block 211 is fixedly inlaid with a locking sleeve 213, and the crank handle 212 and the locking sleeve 213 are engaged and connected. This support assembly, through a multi-stage rotational connection design, can form a stable support frame when unfolded, effectively distributing the load of the robotic arm. At the same time, the cooperation between the crank handle 212 and the locking sleeve 213 enables quick locking and unlocking functions, and the crank handle 212 is convenient for hand force application.

[0030] A magnetic absorbing plate 214 is embedded on the outer side of the end of the cantilever 101. Rubber pads 215 are fixedly connected to the adjacent surfaces of the first fixing ring 205 and the second fixing ring 210. A locking component 3 is provided at the end of the rotating shaft 102. The magnetic absorbing plate 214 can provide adsorption force when the support rod 201 is idle to prevent shaking during transportation. The second trapezoidal strip 208 and the first trapezoidal strip 206 are both provided with guide slopes and extended horizontal surfaces.

[0031] The first hook 207 is engaged with the second trapezoidal strip 208, and the second hook 209 is engaged with the first trapezoidal strip 206. The second trapezoidal strip 208 is located on one side of the second hook 209. This interlocking structure design allows the hooks to slide smoothly along the inclined plane during folding and to be locked securely by the horizontal plane when unfolded, ensuring the stability of the robotic arm during operation.

[0032] The locking assembly 3 includes a protective shell 301 covering the outer side of the end of the rotating shaft 102. A cavity 302 is formed inside one side of the rotating shaft 102. A first spring 303 is fixedly connected inside the cavity 302. A locking bead 304 is fixedly connected to the movable end of the first spring 303. The locking bead 304 fits against the inner wall of the cavity 302. The protective shell 301 has symmetrical locking grooves 305 inside. The locking grooves 305 engage with the locking bead 304. This automatic locking mechanism can achieve positioning and locking every 180° when the folding arm 103 rotates. The cooperation between the locking bead 304 and the locking groove 305 provides obvious tactile feedback, while the preload of the spring ensures the reliability of the locking.

[0033] The magnetic plate 214 is magnetically connected to the support rod 201. This design not only ensures the fixation of the support rod 201 when it is not in use, but also facilitates quick unlocking.

[0034] Working principle: Before using this type of folding robotic arm for drones, it is necessary to check the overall condition of the device to ensure it can function normally. Figure 1 - Figure 5 As shown, when the main body 1 of the drone is no longer in use and the folding arm 103 is folded and stored, the handle 212 is engaged to disengage from the locking sleeve 213. Then, by turning the handle 212, the disc 204 drives the rotating shaft 203 to rotate, thereby causing the first fixing ring 205 to rotate. This causes the first hook 207 to slide from the extended horizontal plane of the second fixing ring 210 to the guide slope, and finally disengage from the guide slope. The second hook 209 slides on the first trapezoidal strip 206 in the same way. Finally, the second trapezoidal strip 208 and the first fixing ring 205 can be quickly separated, and then the folding arm 103 resumes selectable rotation.

[0035] When idle, the support rod 201 can be attracted to the magnetic plate 214 to prevent the support rod 201 from shaking randomly and affecting the handling of the drone body 1. The support rod 201, which can be quickly locked to the rotating folding arm 103, greatly increases the stability of the folding arm 103 after it is unfolded. This prevents the weight of the fan 104, the resistance when a slight collision occurs, and the reaction force during operation from all acting on the rotating shaft 102, which would affect the stability of the rotating shaft 102 and thus the stability of the fan 104 during operation.

[0036] When the first hook 207 moves along the guide ramp of the second fixing ring 210 to the extended horizontal plane, it will pull the two second trapezoidal strips 208 and the first fixing ring 205 to stick together. Moreover, due to the elastic reaction force of the rubber pad 215, the friction between the first hook 207 and the extended horizontal plane will be greatly increased, which will ultimately keep the second trapezoidal strips 208 and the first fixing ring 205 locked.

[0037] By engaging the crank handle 212 into the locking sleeve 213, the second trapezoidal strip 208 and the first fixing ring 205 are engaged with each other through the first hook 207, the second fixing ring 210, the second hook 209, and the first trapezoidal strip 206, thus keeping the relative position of the disc 204 fixed. This locks the second trapezoidal strip 208 and the first fixing ring 205, preventing relative displacement or misalignment of the second trapezoidal strip 208 and the first fixing ring 205 due to vibrations during operation of the drone body 1, which would affect the locking stability.

[0038] After the support rod 201 is unlocked from the folding arm 103, the folding arm 103 and the rotating shaft 102 can be rotated together by applying force, and the locking bead 304 will be squeezed out of one locking groove 305 and retract into the cavity 302 until the locking bead 304 is pushed again into another locking groove 305 by the first spring 303, so that the folding arm 103 is automatically locked after selection, which facilitates the carrying and storage of the drone body 1.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A folding robotic arm for unmanned aerial vehicles (UAVs), comprising a UAV body (1), four cantilever arms (101) are symmetrically fixedly connected to the outer side of the UAV body (1), a pivot shaft (102) is rotatably connected to the end of each cantilever arm (101), a folding arm (103) is fixedly connected to the outer side of the pivot shaft (102), and a fan (104) is installed at the end of the folding arm (103). Its features are, Also includes: A support assembly (2) is provided on the outer side of the cantilever (101). The support assembly (2) includes a support rod (201) rotatably mounted on the outer side of the cantilever (101). A rotating pad (202) is rotatably connected to the top end of the support rod (201). A rotating shaft (203) is rotatably connected to the end of the rotating pad (202). A first fixing ring (205) is fixedly connected to the top end of the rotating shaft (203). A disc (204) is fixedly connected to the bottom end of the rotating shaft (203). A first trapezoidal strip (206) and a first hook (207) are symmetrically fixedly mounted on the outer side of the first fixing ring (205). A second fixing ring (210) is fixedly connected to the bottom of the cantilever (103). A second hook (209) and a second trapezoidal strip (208) are symmetrically fixedly connected to the outer side of the second fixing ring (210). Among them, a rocker arm (212) is fixedly and rotatably connected to the outer side of the disc (204), a notched block (211) is fixedly connected to the outer side of the end of the rotating pad (202), a locking sleeve (213) is fixedly embedded in the inner side of the notched block (211), and the rocker arm (212) is engaged with the locking sleeve (213). Among them, a magnetic absorbing piece (214) is embedded on the outer side of the end of the cantilever (101), and rubber pads (215) are fixedly connected to the adjacent surfaces of the first fixing ring (205) and the second fixing ring (210). A locking component (3) is provided at the end of the rotating shaft (102).

2. The foldable robotic arm for unmanned aerial vehicles according to claim 1, characterized in that: Both the second trapezoidal strip (208) and the first trapezoidal strip (206) are provided with a guiding slope and an extending horizontal surface.

3. The foldable robotic arm for unmanned aerial vehicles according to claim 1, characterized in that: The first hook (207) is engaged with the second trapezoidal strip (208), and the second hook (209) is engaged with the first trapezoidal strip (206).

4. The folding robotic arm for unmanned aerial vehicles according to claim 1, characterized in that: The second trapezoidal strip (208) is located on one side of the second hook (209).

5. A folding robotic arm for unmanned aerial vehicles according to claim 1, characterized in that: The locking assembly (3) includes a protective shell (301) covering the outer side of the end of the rotating shaft (102). A cavity (302) is provided inside one side of the rotating shaft (102). A first spring (303) is fixedly connected inside the cavity (302). A locking bead (304) is fixedly connected to the movable end of the first spring (303). The locking bead (304) fits against the inner wall of the cavity (302).

6. A foldable robotic arm for unmanned aerial vehicles according to claim 5, characterized in that: The protective shell (301) has symmetrically provided slots (305) inside, and the slots (305) are engaged with the slot beads (304).

7. A folding robotic arm for unmanned aerial vehicles according to claim 1, characterized in that: The magnetic absorbing piece (214) is magnetically connected to the support rod (201).

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