Folding motor base arm structure of multi-rotor unmanned aerial vehicle frame

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, and particularly discloses a multi-rotor unmanned aerial vehicle frame folding motor seat arm structure which comprises a frame, the frame is of a longitudinal long-strip-shaped structure, a pair of front arm seats are symmetrically distributed on the left side and the right side of the front portion of the frame, and the tail ends of the front arm seats are rotationally connected with front arms through arm shafts. A pair of rear arm seats is symmetrically distributed on the left side and the right side of the rear portion of the rack, rear arms are rotatably connected to the tail ends of the rear arm seats through arm shafts, guide shafts are fixedly connected to the inner sides of the front arms and the rear arms on the rack correspondingly, and arc rail grooves with the arm shafts as the circle centers are formed in the ends, away from the motor, of the front arms and the rear arms correspondingly. And the arc rail groove is in sliding connection with the guide shaft. The unmanned aerial vehicle frame can be folded and unfolded conveniently, and meanwhile structural stability and operation simplicity and convenience are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a folding motor seat arm structure of a multi-rotor unmanned aerial vehicle frame. Background Art

[0002] At present, the widespread application of drone technology has promoted the continuous progress of drone rack design. However, most of the existing drone racks still have some technical defects:

[0003] First of all, the existing drone frames are complicated and inefficient to operate during the folding and unfolding process, which not only increases the difficulty of use but also affects the drone's rapid response capability.

[0004] Secondly, the stability and accuracy of the drone frame when folding and unfolding is also a big problem. Due to deficiencies in mechanical design and geometric layout, the arms are prone to shaking or inaccurate positioning during folding and unfolding, which seriously affects the flight performance and safety of the drone.

[0005] Finally, the material and structure of the drone frame also need to be optimized. Traditional materials are often heavy and lack strength, which leads to a decrease in the overall performance of the drone and an increase in power consumption.

[0006] Therefore, there is an urgent need for a new type of UAV frame structure to provide an effective solution to the defects of existing technologies. Utility Model Content

[0007] The purpose of the utility model is to provide a folding motor seat arm structure of a multi-rotor drone rack to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A folding motor seat arm structure of a multi-rotor unmanned aerial vehicle frame comprises a frame, the frame is a longitudinal long strip structure, a pair of forearm seats are symmetrically distributed on the left and right sides of the front of the frame, the ends of the forearm seats are rotatably connected to the forearms through arm shafts, a pair of rear arm seats are symmetrically distributed on the left and right sides of the rear of the frame, the ends of the rear arm seats are rotatably connected to the rear arms through arm shafts, a guide shaft is fixedly connected to the inner sides of the forearm and the rear arm on the frame, and an arc track groove with the arm shaft as the center is provided on the end of the forearm and the rear arm away from the motor, and the arc track groove is slidably connected to the guide shaft.

[0010] Furthermore, both ends of the circular arc rail groove are provided with inwardly-retracted limiting gaps, and the width of the limiting gaps is slightly smaller than the diameter of the clamping column.

[0011] Furthermore, the unfolding angle of the forearm is smaller than that of the rear arm, a pair of clamping columns are fixedly connected to the middle of the frame, and a clamping column groove is also provided at one end of the forearm away from the motor. The clamping column is engaged with the clamping column groove, and the opening width of the clamping column groove is slightly smaller than the diameter of the clamping column.

[0012] Furthermore, the arm shaft is connected to the frame by screwing with a thread, and after the arm shaft is tightened, the head of the arm shaft is pressed against the upper surface of the circular arc rail groove.

[0013] Furthermore, the forearm, rear arm and frame are all made of carbon fiber material.

[0014] Furthermore, the frame is made of glass fiber board, aluminum alloy, titanium alloy or epoxy resin board.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model uses reasonable mechanical design and geometric layout to make the drone frame smaller in the folded state, which is easy to carry and transport. The forearm and rear arm can be folded and unfolded by simply rotating the drive arm shaft. The operation process is simple and fast, which improves the efficiency of the drone. The sliding connection design of the guide shaft and the arc track groove ensures the stability and accuracy of the forearm and rear arm during the folding and unfolding process. The utility model realizes the convenient folding and unfolding of the drone frame, while ensuring the stability of the structure and the ease of operation.

[0017] 2. In the present invention, the elastic rail groove design is combined with the clamping mechanism through the limit gap, which provides a simple, effective and reliable clamping method for the device. It can not only achieve accurate positioning and stable clamping of the clamping column, but also facilitate the removal of the clamping column when needed, while ensuring the safety and durability of the device.

[0018] 3. In the utility model, the arm shaft is connected to the frame by screwing. After tightening the arm shaft, the head of the arm shaft is pressed against the upper surface of the arc track groove, which plays a role in locking the front arm and the rear arm to ensure the stability of the machine arm after it is unfolded. When the machine arm needs to be rotated, loosen the arm shaft first.

[0019] 4. In the present invention, the forearm, rear arm and frame are all made of carbon fiber material, which has the advantages of light weight, high strength and high rigidity, and can reduce power consumption while improving the performance of the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a folding motor seat arm structure of a multi-rotor UAV after the arm is folded;

[0021] Figure 2It is a schematic diagram of the structure of a multi-rotor UAV frame with a folding motor seat arm structure after the arm is unfolded;

[0022] Figure 3 It is a structural schematic diagram of a frame in a folding motor seat arm structure of a multi-rotor UAV frame;

[0023] Figure 4 It is a schematic diagram of the partial structure of the rear arm in the folding motor seat arm structure of a multi-rotor UAV frame;

[0024] Figure 5 The present invention is a schematic diagram of the local structure of a forearm in a folding motor mount arm structure of a multi-rotor UAV frame.

[0025] In the figure: 1, frame; 2, rear arm seat; 3, front arm seat; 4, arm shaft; 5, guide shaft; 6, rear arm; 7, arc rail groove; 8, front arm; 9, clamping column; 10, clamping column groove; 11, limit gap. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1: Please refer to Figures 1 to 5 A folding motor seat arm structure of a multi-rotor unmanned aerial vehicle frame includes a frame 1, which is a longitudinal long strip structure. A pair of forearm seats 3 are symmetrically distributed on the left and right sides of the front of the frame 1, and the ends of the forearm seats 3 are rotatably connected to the forearms 8 through arm shafts 4. A pair of rear arm seats 2 are symmetrically distributed on the left and right sides of the rear of the frame 1, and the ends of the rear arm seats 2 are rotatably connected to the rear arms 6 through arm shafts 4. A guide shaft 5 is fixedly connected to the inner sides of the forearm 8 and the rear arm 6 on the frame 1, and the ends of the forearm 8 and the rear arm 6 away from the motor are provided with arc track grooves 7 with the arm shaft 4 as the center, and the arc track grooves 7 are slidably connected to the guide shaft 5.

[0028] Working principle of this embodiment:

[0029] When the drone needs to be folded, the arm shaft 4 on the forearm seat 3 and the rear arm seat 2 is first driven to rotate by the control mechanism. As the arm shaft 4 rotates, the forearm 8 and the rear arm 6 will rotate and fold along the arm shaft 4 as the center. In this process, the guide shaft 5 on the inner side of the forearm 8 and the rear arm 6 plays a key role. At the same time, the guide shaft 5 is slidably connected to the circular arc track groove 7 set at the arm end away from the motor, and the forearm 8 and the rear arm 6 can move along the predetermined trajectory when folding and unfolding, ensuring the stability of the forearm 8 and the rear arm 6 during the rotation process. With the further rotation of the arm shaft 4, the forearm 8 and the rear arm 6 gradually approach the frame 1 and finally achieve folding. Conversely, when the drone frame needs to be unfolded, by driving the arm shaft 4 in the reverse direction, the forearm 8 and the rear arm 6 will unfold along the trajectory of the circular arc track groove 7 until they reach the predetermined working position.

[0030] This embodiment uses reasonable mechanical design and geometric layout to make the drone frame smaller in size when folded, making it easier to carry and transport. The forearm 8 and the rear arm 6 can be folded and unfolded by simply rotating the drive arm shaft 4. The operation process is simple and quick, which improves the efficiency of the drone. The sliding connection design of the guide shaft 5 and the arc track groove 7 ensures the stability and accuracy of the forearm 8 and the rear arm 6 during the folding and unfolding process.

[0031] Therefore, this embodiment realizes the convenient folding and unfolding of the drone rack, while ensuring the stability of the structure and the ease of operation.

[0032] Example 2: Please refer to Figures 4-5 , a folding motor seat arm structure of a multi-rotor drone frame, which differs from Example 1 in that both ends of the circular arc rail groove 7 are provided with inward-retracted limit gaps 11, and the width of the limit gap 11 is slightly smaller than the diameter of the clamping column 9.

[0033] In this embodiment, since the rail groove is elastic, when the clamping column 9 applies an appropriate force, it can compress the elastic part of the rail groove, so that the limiting gap 11 is temporarily expanded, thereby allowing the clamping column to pass through. Once the clamping column 9 passes through the limiting gap 11, the elastic part of the rail groove will return to its original state, so that the clamping column 9 is tightly clamped at the end of the rail groove 7 to achieve a clamping effect. Since the clamping column 9 is tightly clamped, to remove it from the rail groove, a large force needs to be applied to overcome the elasticity and clamping force of the rail groove.

[0034] In this embodiment, the elastic rail groove design is combined with the clamping mechanism through the limited gap to provide a simple, effective and reliable clamping method for the device. It can not only achieve accurate positioning and stable clamping of the clamping column, but also facilitate the removal of the clamping column when needed, while ensuring the safety and durability of the device.

[0035] Example 3: Please refer to Figures 1 to 3And 5, a multi-rotor unmanned aerial vehicle frame folding motor seat arm structure, the difference from Example 1 is that the unfolding angle of the forearm 8 is smaller than the unfolding angle of the rear arm 6, a pair of clamping columns 9 are fixedly connected to the middle part of the frame 1, and a clamping column groove 10 is also provided at the end of the forearm 8 away from the motor, the clamping column 9 is clamped and matched with the clamping column groove 10, and the opening width of the clamping column groove 10 is slightly smaller than the diameter of the clamping column 9.

[0036] In this embodiment, in order to make full use of the space, the unfolding angle of the forearm 8 is smaller than the unfolding angle of the rear arm 6. The risk of the forearm 8 being accidentally folded during the operation of the drone also increases. In this embodiment, the stability of the forearm 8 after unfolding is improved by the engagement of the clamping column 9 and the clamping column groove 10.

[0037] Example 4: Please refer to Figures 1-2 , a folding motor seat arm structure of a multi-rotor unmanned aerial vehicle frame, which differs from Example 1 in that the arm shaft 4 is connected to the frame 1 by screwing, and after tightening the arm shaft 4, the head of the arm shaft 4 is pressed against the upper surface of the arc rail groove 7.

[0038] In this embodiment, the arm shaft 4 is connected to the frame 1 by screwing. After tightening the arm shaft 4, the head of the arm shaft 4 is pressed against the upper surface of the arc track groove 7, which plays a role in locking the front arm 8 and the rear arm 6 to ensure the stability of the machine arm after it is unfolded. When the machine arm needs to be rotated, loosen the arm shaft 4 first.

[0039] Example 5: Please refer to Figures 1 to 5 , a multi-rotor drone frame folding motor seat arm structure, which is different from Example 1 in that the forearm 8, the rear arm 6 and the frame 1 are all made of carbon fiber material.

[0040] In this embodiment, the front arm 8, the rear arm 6 and the frame 1 are all made of carbon fiber material, which has the advantages of light weight, high strength and high rigidity, and can reduce power consumption while improving the performance of the drone.

[0041] Example 6: Please refer to Figures 1 to 3 , a multi-rotor drone frame folding motor seat arm structure, which is different from Example 1 in that the frame 1 is made of fiberglass board or aluminum alloy or titanium alloy or epoxy resin board.

[0042] In this embodiment, in order to reduce the manufacturing cost, the frame 1 can also be made of glass fiber board, aluminum alloy, titanium alloy or epoxy resin board, the strength and rigidity of which can meet the use requirements, but the power consumption will increase accordingly.

Claims

1. A folding motor arm structure for a multi-rotor drone frame, comprising a frame (1), Features: The frame (1) is a longitudinal strip-shaped structure. A pair of forearm seats (3) are symmetrically distributed on the left and right sides of the front of the frame (1). The ends of the forearm seats (3) are rotatably connected to the forearms (8) via arm shafts (4). A pair of rear arm seats (2) are symmetrically distributed on the left and right sides of the rear of the frame (1). The ends of the rear arm seats (2) are rotatably connected to the rear arms (6) via arm shafts (4). A guide shaft (5) is fixedly connected to the inner sides of the forearm (8) and the rear arm (6) on the frame (1). The ends of the forearm (8) and the rear arm (6) away from the motor are both provided with arc track grooves (7) with the arm shaft (4) as the center of the circle. The arc track grooves (7) are slidably connected to the guide shaft (5).

2. A folding motor seat arm structure for a multi-rotor drone frame according to claim 1, Features: Both ends of the circular arc track groove (7) are provided with inwardly contracted limiting gaps (11), and the width of the limiting gap (11) is slightly smaller than the diameter of the clamping column (9).

3. A folding motor seat arm structure for a multi-rotor drone frame according to claim 1, Features: The unfolding angle of the front arm (8) is smaller than the unfolding angle of the rear arm (6); a pair of clamping columns (9) are fixedly connected to the middle of the frame (1); a clamping column groove (10) is also provided at one end of the front arm (8) away from the motor; the clamping column (9) is clamped and matched with the clamping column groove (10); and the opening width of the clamping column groove (10) is slightly smaller than the diameter of the clamping column (9).

4. A folding motor seat arm structure for a multi-rotor drone frame according to claim 1, Features: The arm shaft (4) is connected to the frame (1) by screwing with a thread, and after the arm shaft (4) is tightened, the head of the arm shaft (4) is pressed against the upper surface of the circular arc track groove (7).

5. The folding motor seat arm structure of a multi-rotor drone frame according to claim 1, Features: The front arm (8), the rear arm (6) and the frame (1) are all made of carbon fiber material.

6. The folding motor seat arm structure of a multi-rotor drone frame according to claim 1, Features: The frame (1) is made of glass fiber board, aluminum alloy, titanium alloy or epoxy resin board.

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