Unmanned aerial vehicle rotating shaft with large torsion

Abstract

The invention relates to a large-torsion unmanned aerial vehicle rotating shaft, which belongs to the technical field of unmanned aerial vehicle parts, and comprises a shaft core, an outer cam, an inner cam, a clamp spring, a spring and a shell, the unmanned aerial vehicle rotating shaft further comprises an abutting block and an adjusting assembly, the abutting block is arranged between the spring and the barrel bottom and movably arranged on the shaft core in a sleeving mode, and the adjusting assembly is used for adjusting the distance between the abutting block and the inner cam so as to change the compression amount of the spring. The abutting block is arranged between the spring and the barrel bottom, the spring compression amount between the inner cam and the abutting block is changed, accurate adjustment of the elastic force of the spring is achieved, the replacement frequency of the spring can be reduced through regular debugging of the adjusting assembly, and the service life of the unmanned aerial vehicle rotating shaft is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of unmanned aerial vehicle parts, and in particular relates to a rotating shaft of a unmanned aerial vehicle with large torque. Background Art

[0002] In the early days of drones, the arms were fixedly connected to the fuselage. Later, in order to increase portability, the arms and fuselage were designed to be rotatably connected.

[0003] For example, the utility model patent with patent authorization announcement number: CN208216972U discloses a rotating shaft for a drone arm, comprising: a shaft core, an outer cam, an inner cam, a spring, and a retaining spring; one end of the shaft core has a step, and the other end passes through the outer cam, inner cam, and spring in sequence and is fixed to the retaining spring, the spring being compressed and allowing the outer and inner cams to engage reliably; and the relative rotation angle between the outer and inner cams is divided into three sections: a closed section, a free section, and an open section. A rotating shaft for a drone arm according to this technical solution can be used as a standard part for the rotatable connection between drone arms and fuselages of various specifications, and its three-section design of the rotation angle makes it more convenient to use and provides a better consumer experience.

[0004] Based on the search of the above patent authorization announcement number and the shortcomings found therein: When traditional drone shafts are faced with frequent folding and unfolding operations, the springs of the drone shafts will be in a constant state of compression and release, which can easily cause fatigue wear of the springs, reduce their elasticity, and thus affect the meshing force between the inner cam and the outer cam, shortening the service life of the shaft. Summary of the Invention

[0005] In order to solve the problem that the spring of the conventional drone shaft is constantly compressed and released during frequent folding and unfolding operations, which easily leads to fatigue wear of the spring, reduces its elastic force, and further affects the meshing force between the inner cam and the outer cam, thereby shortening the service life of the shaft, the present invention provides a drone shaft with high torque.

[0006] The purpose of the present invention can be achieved through the following technical solutions: The application discloses a large-torque unmanned aerial vehicle rotating shaft, which comprises a shaft core, an outer cam, an inner cam, a clamping spring, a spring and a shell; one end of the shaft core is provided with a step, and the other end sequentially penetrates through the outer cam, the inner cam and the spring, and is clamped and fixed with the clamping spring; the spring is compressed and enables the outer cam and the inner cam to be reliably engaged; the shell is in the shape of a barrel, the opening end of the shell is plugged into the outer cam to be closed, the barrel bottom of the other end of the shell is arranged on the shaft core, and the barrel bottom is located between the clamping spring and the spring, so that the spring and the inner cam are closed in the shell; wherein the unmanned aerial vehicle rotating shaft further comprises an abutting block and an adjusting assembly; the abutting block is arranged between the spring and the barrel bottom, and the abutting block is movably sleeved on the shaft core; and the adjusting assembly is used for adjusting the distance between the abutting block and the inner cam, so as to change the compression amount of the spring.

[0007] As a preferred technical scheme of the application, the other end of the shaft core is provided with an adjusting hole in the axial direction; the adjusting assembly comprises an adjusting screw which is screwed to the adjusting hole; the abutting block comprises a sliding part arranged in the adjusting hole, a connecting part extending out of the shaft core in the radial direction from the outer periphery of the sliding part, and an abutting part connected to the connecting part and extending out of one side of the shaft core; the sliding part abuts against one end of the adjusting screw extending into the adjusting hole, and the abutting part abuts against the spring; and the shaft core is provided with an opening hole corresponding to the sliding path of the connecting part in the axial direction.

[0008] As a preferred technical scheme of the application, the barrel bottom is provided with an electrically-controlled telescopic part, the telescopic end of the electrically-controlled telescopic part is located between the abutting block and the barrel bottom, and the telescopic end of the electrically-controlled telescopic part telescopes in the axial direction of the shaft core.

[0009] As a preferred technical scheme of the application, the unmanned aerial vehicle rotating shaft further comprises a height sensor and a controller, the controller is electrically connected to the electrically-controlled telescopic part; when the height sensor detects that the flight height of the unmanned aerial vehicle rotating shaft is lower than a preset threshold value, the controller controls the telescopic end of the electrically-controlled telescopic part to extend by a first distance; when the height sensor detects that the flight height of the unmanned aerial vehicle rotating shaft is not less than the preset threshold value, the controller controls the telescopic end of the electrically-controlled telescopic part to extend by a second distance; wherein the first distance is less than the second distance.

[0010] As a preferred technical scheme of the application, an elastic part is arranged between the outer cam and the inner cam, one end of the elastic part is detachably connected to the outer cam, the other end of the elastic part is detachably connected to the inner cam, and the elastic part is used for providing a relative pulling force for the outer cam and the inner cam.

[0011] As a preferred technical solution of the present invention, a rotating ring is provided on the outer peripheral side of the inner cam, the rotating ring is rotatably provided on the inner cam, and the other end of the elastic member is detachably connected to the rotating ring.

[0012] As a preferred technical solution of the present invention, a guide rod is provided between the rotating ring and the outer cam, and the guide rod is parallel to the axis core; the guide rod is fixedly connected to the outer cam, and the guide rod passes through the rotating ring and is axially slidingly connected to the rotating ring.

[0013] As a preferred technical solution of the present invention, the rotating ring is provided with a hook, and the other end of the elastic member is hung on the hook.

[0014] As a preferred technical solution of the present invention, the drone shaft includes a push-to-unlock mechanism, which includes a push piece and a response unlocking component, and both the push piece and the response unlocking component are arranged on the shaft core; when the push piece is operated, the response unlocking component is triggered to disengage the other end of the elastic piece from the hook.

[0015] As a preferred technical solution of the present invention, the relative rotation angle between the outer cam and the inner cam is divided into three sections, namely, a closed section, a free section and an open section; when an external force is applied so that the relative angle between the outer cam and the inner cam is within the closed section, the drone shaft automatically closes after the external force is removed; when an external force is applied so that the relative angle between the outer cam and the inner cam is within the open section, the drone shaft automatically opens after the external force is removed; when an external force is applied so that the relative angle between the outer cam and the inner cam is within the free section, the drone shaft maintains the angle after the external force is removed.

[0016] The beneficial effects of the present invention are: The present invention provides an abutment block between the spring and the bottom of the barrel, and changes the position of the abutment block by adjusting the component, thereby changing the compression amount of the spring between the inner cam and the abutment block. By utilizing the characteristic that the spring force is proportional to the compression amount, precise adjustment of the spring force is achieved to meet the requirements of elastic force under different working conditions. Regular debugging of the adjustment component can keep the spring working within a reasonable stress range, avoid fatigue wear of the spring due to excessive compression or stretching, extend the service life of the drone shaft, and reduce the replacement frequency of the spring and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0018] Figure 1 This is an exploded view of a high-torque UAV shaft according to the present invention; Figure 2 Assemble drawing of the unmanned aerial vehicle rotating shaft with large torsion force of the present application; Figure 3 Assemble drawing of the unmanned aerial vehicle rotating shaft with large torsion force of the present application; Figure 4 Sectional view of the unmanned aerial vehicle rotating shaft with large torsion force of the present application using adjusting screw to compress spring; Figure 5 Sectional view of the unmanned aerial vehicle rotating shaft with large torsion force of the present application using electric control telescopic piece to compress spring; Figure 6 Abutting block structure schematic diagram of the unmanned aerial vehicle rotating shaft with large torsion force of the present application; Figure 7 Sectional view of the unmanned aerial vehicle rotating shaft with large torsion force of the present application using outer cam, inner cam and shaft core first matching structure; Figure 8 A portion enlarged structure schematic diagram of Figure 7 ; Figure 9 Sectional view of the unmanned aerial vehicle rotating shaft with large torsion force of the present application using outer cam, inner cam and shaft core second matching structure; Figure 10 B portion enlarged structure schematic diagram of Figure 9 ; Figure 11 Sectional view of the unmanned aerial vehicle rotating shaft with large torsion force of the present application using outer cam, inner cam and shaft core third matching structure; Figure 12 C portion enlarged structure schematic diagram of Figure 11 .

[0019] Main symbol explanation In the drawing: 10, shaft core; 11, step; 12, adjusting hole; 20, outer cam; 21, snap ring; 30, inner cam; 40, snap spring; 50, spring; 60, shell; 61, barrel bottom; 62, electric control telescopic piece; 70, abutting block; 71, sliding part; 72, connecting part; 73, abutting part; 80, adjusting screw; 90, elastic piece; 100, rotating ring; 101, guide rod; 102, clamping hook; 110, pressing piece; 111, recessed area; 112, second spring; 120, sliding block; 121, third spring. Specific implementation

[0020] In order to further illustrate the technical means and effects taken by the present application to achieve the predetermined invention purpose, the specific implementation, structure, features and effects according to the present application are described in detail as follows by combining with the drawings and preferred embodiments.

[0021] The spring 50 inside the traditional unmanned aerial vehicle rotating shaft is prone to fatigue and wear due to constant compression and release in frequent folding and unfolding operations, which reduces the elastic force and affects the meshing force between the outer cam 20 and the inner cam 30, thereby shortening the service life of the unmanned aerial vehicle rotating shaft. In view of this, the present application designs an unmanned aerial vehicle rotating shaft capable of adjusting the compression amount of the spring 50, so as to keep the spring 50 elastic force stable under different working conditions, ensure the reliable meshing of the outer cam 20 and the inner cam 30, meet the requirements of the unmanned aerial vehicle for the stability and durability of the rotating shaft, and the specific description is as follows.

[0022] Please refer to Figures 1-2 The present application provides a large-torque unmanned aerial vehicle rotating shaft, comprising a shaft core 10, an outer cam 20, an inner cam 30, a clamping spring 40, a spring 50 and an outer shell 60; the shaft core 10 has a step 11 at one end and is fixedly connected to the clamping spring 40 at the other end after sequentially penetrating through the outer cam 20, the inner cam 30 and the spring 50, the spring 50 is compressed and the outer cam 20 and the inner cam 30 are reliably meshed; the outer shell 60 is barrel-shaped, the opening end thereof is closed by the outer cam 20, and the barrel bottom 61 at the other end is arranged on the shaft core 10, and the barrel bottom 61 is located between the clamping spring 40 and the spring 50, so as to enclose the spring 50 and the inner cam 30 in the outer shell 60; wherein the unmanned aerial vehicle rotating shaft further comprises an abutting block 70 and an adjusting assembly, the abutting block 70 is arranged between the spring 50 and the barrel bottom 61, and the abutting block 70 is movably sleeved on the shaft core 10, and the adjusting assembly is used for adjusting the distance between the abutting block 70 and the inner cam 30 to change the compression amount of the spring 50.

[0023] It can be understood that the shaft core 10, the outer cam 20, the inner cam 30, the clamping spring 40, the spring 50 and the outer shell 60 constitute the basic framework of the unmanned aerial vehicle rotating shaft, the step 11 at one end of the shaft core 10 and the clamping spring 40 at the other end form a fixed support, the spring 50 is installed between the outer cam 20 and the inner cam 30 and is compressed, and the elastic force is generated to tightly mesh the outer cam 20 and the inner cam 30. In the embodiment, the abutting block 70 is located between the spring 50 and the barrel bottom 61 of the outer shell 60 and can move axially along the shaft core 10, and the adjusting assembly acts on the abutting block 70 to change the distance between the abutting block 70 and the inner cam 30, so as to adjust the compression amount of the spring 50. When the abutting block 70 moves towards the inner cam 30, the spring 50 is further compressed, and the elastic force of the spring 50 increases; on the contrary, the elastic force of the spring 50 decreases. By using the characteristic that the elastic force of the spring 50 is proportional to the compression amount, the elastic force is precisely adjusted.

[0024] In this embodiment, the adjustment assembly precisely controls the position of abutment block 70, enabling continuous adjustment of the compression of spring 50 to meet the elastic force requirements of different operating conditions, such as increasing the elastic force to enhance engagement force in low-temperature or high-load environments. Furthermore, regular adjustment of abutment block 70 by the adjustment assembly prevents elastic errors caused by fatigue wear of the spring 50 due to excessive compression or extension, ensuring that the spring 50 always operates within a reasonable stress range, extending its service life, reducing replacement frequency, and lowering maintenance costs.

[0025] In some embodiments, the relative rotation angle between the outer cam 20 and the inner cam 30 is divided into three sections, namely, a closed section, a free section, and an open section; when an external force is applied so that the relative angle between the outer cam 20 and the inner cam 30 is within the closed section, the drone shaft automatically closes after the external force is removed; when an external force is applied so that the relative angle between the outer cam 20 and the inner cam 30 is within the open section, the drone shaft automatically opens after the external force is removed; when an external force is applied so that the relative angle between the outer cam 20 and the inner cam 30 is within the free section, the drone shaft maintains the angle after the external force is removed. It should be noted that for different materials and spring 50 parameters, it is necessary to adjust the function of each section of the surface by setting the inclination of the working surface of the outer cam 20 and the inner cam 30 to achieve the functional distinction between the closed section, the free section, and the open section. These belong to the prior art and will not be described in detail herein.

[0026] See also Figures 3-6 In some embodiments, the other end of the shaft core 10 is axially provided with an adjustment hole 12; the adjustment assembly includes an adjustment screw 80 threadedly connected to the adjustment hole 12; the abutment block 70 includes a sliding portion 71 disposed within the adjustment hole 12, a connecting portion 72 radially extending from the outer periphery of the sliding portion 71 and passing through the shaft core 10, and an abutment portion 73 connected to the side of the connecting portion 72 that passes through the shaft core 10. The sliding portion 71 abuts the end of the adjustment screw 80 extending into the adjustment hole 12, and the abutment portion 73 abuts the spring 50. The shaft core 10 is axially provided with an opening corresponding to the sliding path of the connecting portion 72. The adjustment screw 80 is inserted from the other end of the shaft core 10.

[0027] It is understood that, because the adjusting screw 80 is threadedly connected to the adjusting hole 12 of the shaft core 10, when the adjusting screw 80 is rotated, it moves axially within the adjusting hole 12. Furthermore, because the sliding portion 71 of the abutment block 70 abuts the end of the adjusting screw 80, the movement of the adjusting screw 80 drives the abutment block 70 to move axially along the shaft core 10, thereby changing the distance between the abutment block 70 and the inner cam 30, thereby adjusting the compression of the spring 50. In other words, by controlling the rotation of the adjusting screw 80, the degree of compression of the spring 50 can be precisely adjusted, thereby changing the elastic force of the spring 50.

[0028] Specifically, to increase the spring force of spring 50, the adjusting screw 80 is rotated clockwise to move it into the adjustment hole 12. Pushed by the adjusting screw 80, the abutment block 70 moves toward the inner cam 30, further compressing the spring 50. Conversely, rotating the adjusting screw 80 counterclockwise moves the abutment block 70 outward, reducing the compression of the spring 50 and lowering the spring force. Once adjustment is complete, the adjusting screw 80 is released, and the abutment block 70 remains in its new position under the force of the spring 50, allowing the shaft to continue operating at the adjusted spring force.

[0029] In some embodiments, the barrel bottom 61 is provided with an electrically controlled telescopic member 62. The telescopic end of the electrically controlled telescopic member 62 is located between the abutment block 70 and the barrel bottom 61, and the telescopic end of the electrically controlled telescopic member 62 moves axially along the shaft core 10. Alternatively, the electrically controlled telescopic member 62 may be an electric push rod or an electrically controlled cylinder. The telescopic end of the electrically controlled telescopic member 62 extends or retracts upon receiving a control signal. When the telescopic end extends, it pushes the abutment block 70 toward the inner cam 30, further compressing the spring 50 and increasing its elastic force. When the telescopic end retracts, the abutment block 70 moves outward under the elastic force of the spring 50, reducing the compression of the spring 50 and lowering its elastic force. It is understood that, compared to the aforementioned embodiment in which the position of the abutment block 70 is adjusted manually by rotating the adjustment screw 80, this embodiment controls the position of the abutment block 70 by adjusting the extension length of the telescopic end of the electrically controlled telescopic member 62. This gives the drone's rotating shaft intelligent features, facilitates integration with the drone's flight control system, achieves automated control, reduces the operator's burden, and enhances the drone's intelligence level.

[0030] Furthermore, the drone shaft also includes an altitude sensor and a controller, the controller being electrically connected to the electrically controlled telescopic member 62. When the altitude sensor detects that the drone shaft's flight altitude is below a preset threshold, the controller controls the telescopic end of the electrically controlled telescopic member 62 to extend a first distance. When the altitude sensor detects that the drone shaft's flight altitude is not less than the preset threshold, the controller controls the telescopic end of the electrically controlled telescopic member 62 to extend a second distance. The first distance is less than the second distance. The altitude sensor is used to monitor the drone shaft's flight altitude in real time and transmit the altitude signal to the controller. The controller, based on the preset altitude threshold and control logic, sends a control signal to the electrically controlled telescopic member 62 to adjust the telescopic distance of its telescopic end.

[0031] It should be explained that when the altitude sensor detects that the flight altitude is below a preset threshold, the controller determines that the drone is in a low-altitude flight state. At this time, a smaller elastic force of spring 50 is required to maintain the flexibility of the drone's arm movement. Therefore, the controller controls the telescopic end of the electrically controlled telescopic member 62 to extend a first distance. When the flight altitude is not less than the preset threshold, the controller determines that the drone is in a high-altitude flight state. At this time, a larger elastic force is required to enhance stability. Therefore, the controller controls the telescopic end of the electrically controlled telescopic member 62 to extend a second distance (the second distance is greater than the first distance), causing the abutment block 70 to move toward the inner cam 30, further compressing the spring 50 and increasing the spring 50's elastic force. When the flight mission ends or the initial elastic force needs to be restored, the controller can send a reset signal to return the telescopic end of the electrically controlled telescopic member 62 to its initial position, and the spring 50 returns to its pre-compressed state.

[0032] In this embodiment, the spring 50's elastic force is increased during high-altitude flight to enhance the stability and anti-interference capabilities of the drone's rotating shaft, reduce vibration and jitter caused by factors such as airflow, and ensure flight safety. At low altitudes, the spring 50's elastic force is reduced to avoid unnecessary energy consumption and component wear caused by excessive spring 50 force, while also ensuring the flexibility of the rotating shaft. Optionally, the altitude sensor can be one or more of a barometer-type altitude sensor, an ultrasonic altitude sensor, a lidar altitude sensor, and a GPS altitude sensor.

[0033] See also Figures 9-12 In some embodiments, an elastic member 90 is provided between the outer cam 20 and the inner cam 30. One end of the elastic member 90 is detachably connected to the outer cam 20, and the other end of the elastic member 90 is detachably connected to the inner cam 30. The elastic member 90 is used to provide opposite pulling forces for the outer cam 20 and the inner cam 30.

[0034] It is understood that the elastic member 90 can work together with the existing spring 50. The spring 50 provides axial elastic force to maintain tight engagement between the outer cam 20 and the inner cam 30. The elastic member 90, in turn, provides directional pulling force to the outer cam 20 and the inner cam 30, further strengthening the meshing force between them and making the shaft more stable and reliable when subjected to torque. When the shaft rotates or is subjected to external forces, the elastic member 90 and the spring 50 work together to resist the external forces, ensuring the stability and reliability of the shaft. Furthermore, the ends of the elastic member 90 are detachably connected to the outer cam 20 and the inner cam 30. When the elastic member 90 needs to be replaced, the detachable connections at both ends are loosened, the old elastic member 90 is removed, a new elastic member 90 is installed, and the connection is reconnected. This facilitates replacement of the elastic member 90 if it becomes fatigued or damaged, eliminating the need to replace the entire shaft, thus reducing maintenance costs.

[0035] Optionally, the elastic member 90 can be a nylon elastic rope or an elastic fabric belt, which has the advantages of light weight, good flexibility, easy installation, etc. The two ends of the nylon elastic rope or the elastic fabric belt can be connected to the inner cam 30 or the outer cam 20 through a fastening buckle.

[0036] Please refer to Figures 7-8 In some embodiments, the outer circumferential side of the inner cam 30 is provided with a rotating ring 100, which is rotatably arranged on the inner cam 30, and the other end of the elastic member 90 is detachably connected to the rotating ring 100.

[0037] It needs to be explained that when designing the elastic member 90 to connect the outer cam 20 and the inner cam 30, the designer found that if the elastic member 90 is directly connected to the inner cam 30, when the outer cam 20 rotates, the elastic member 90 will also rotate, thereby generating a torsional moment on the inner cam 30. Since the inner cam 30 is designed to be able to move axially in the outer shell 60 but not to be able to rotate, this torsional moment will hinder the axial movement of the inner cam 30 and increase the friction between the inner cam 30 and the outer shell 60. This additional friction not only affects the smooth movement of the inner cam 30, but also can cause the inner cam 30 to be stuck or deviated when moving axially, thereby damaging the precise engagement between the outer cam 20 and the inner cam 30. In view of this, the rotating ring 100 is designed in this embodiment, which is installed on the outer circumferential side of the inner cam 30 and can rotate freely. One end of the elastic member 90 is connected to the outer cam 20, and the other end is connected to the rotating ring 100. In this way, when the outer cam 20 rotates, the rotating ring 100 rotates with it, and the torsional moment is not transmitted to the inner cam 30, thereby avoiding interference with the axial movement of the inner cam 30, ensuring that the inner cam 30 can move smoothly in the outer shell 60, ensuring the close engagement between the outer cam 20 and the inner cam 30, improving the stability and reliability of the shaft, and prolonging its service life.

[0038] Further, a guide rod 101 is arranged between the rotating ring 100 and the outer cam 20, and the guide rod 101 is parallel to the shaft core 10; the guide rod 101 is fixedly connected to the outer cam 20, and the guide rod 101 passes through the rotating ring 100 and is axially slidably connected to the rotating ring 100.

[0039] Specifically, when the unmanned aerial vehicle shaft is folded or unfolded, the outer cam 20 rotates, which drives the rotating ring 100 to rotate through the guide rod 101, and at the same time, the guide rod 101 ensures the linear motion of the rotating ring 100, avoiding the inclination or deviation of the rotating ring 100, and ensuring the stability and reliability of the unmanned aerial vehicle shaft when bearing torque and axial force.

[0040] As Figures 9-12 shown, in some embodiments, the rotating ring 100 is provided with a hook 102, and the other end of the elastic member 90 is hung on the hook 102.

[0041] It is understood that one end of the elastic member 90 is detachably connected to the retaining ring 21 on the outer cam 20, and the other end is connected to the hook 102 via a collar. This allows the elastic member 90 to be stably connected between the outer cam 20 and the rotating ring 100, providing a pulling force in opposite directions between the outer cam 20 and the inner cam 30. During operation of the rotating shaft, the elastic member 90, through the connection between the collar, the hook 102, and the retaining ring 21, stably transmits the pulling force to the outer cam 20 and the rotating ring 100, which in turn acts on the inner cam 30, ensuring a tight engagement between the outer cam 20 and the inner cam 30 and improving the stability and reliability of the rotating shaft when subjected to torque and axial forces. Specifically, during installation, the collar on one end of the elastic member 90 is hung on the retaining ring 21, and the collar on the other end is hung on the hook 102. At this time, the outer cam 20 and the inner cam 30 are maintained in tight engagement under the combined action of the spring 50 and the elastic member 90.

[0042] Optionally, the snap ring 21 is a ring body connected end to end, and a snap ring that can be opened and closed is provided at one end of the elastic member 90, and the snap ring 21 is connected through the snap ring to achieve the connection between the elastic member 90 and the outer cam 20; or, one end of the elastic member 90 is passed around the ring body and tied to achieve the connection between the elastic member 90 and the outer cam 20.

[0043] In some embodiments, the drone shaft includes a push-to-unlock mechanism, which includes a push-to-unlock mechanism 110 and a response unlocking component. The push-to-unlock mechanism 110 and the response unlocking component are both arranged on the shaft core 10. When the push-to-unlock mechanism 110 is operated, the response unlocking component is triggered to disengage the other end of the elastic member 90 from the hook 102.

[0044] Specifically, when the operator presses the pressing member 110, the pressing member 110 transmits the force to the response unlocking component, and the response unlocking component disengages one end of the elastic member 90 from the hook 102, and the elastic member 90 is unlocked. After unlocking, the operator can directly remove the failed elastic member 90, install a new elastic member 90, and re-hang it on the hook 102 and the retaining ring 21 to restore the normal operation of the rotating shaft.

[0045] In some embodiments, the opening formed by the clamping hook 102 for the elastic member 90 is upward, and without obstruction, the other end of the elastic member 90 will be detached from the clamping hook 102 and out of the opening of the clamping hook 102 under the action of elastic restoring force; the response unlocking assembly comprises a sliding block 120 connected to the clamping hook 102, the rotating ring 100 is provided with a first slot hole in the radial direction, the inner cam 30 is provided with a second slot hole in the radial direction, the shaft core 10 is provided with a vertical hole for penetrating the pressing member 110 in the axial direction, the shaft core 10 is further provided with a third slot hole in the radial direction, the third slot hole is communicated with the vertical hole, the first slot hole, the second slot hole and the third slot hole are communicated, and the sliding block 120 abuts against the pressing member 110 through the first slot hole, the second slot hole and the third slot hole. Wherein, when the pressing member 110 is in the initial state of non-operation, the sliding block 120 abuts against the recessed area 111 of the pressing member 110, at this time, the clamping hook 102 is accommodated in the first slot hole, the opening of the clamping hook 102 is blocked by the slot wall of the first slot hole, and the elastic member 90 cannot be detached through the opening; when the pressing member 110 is operated to be pressed to the unlocking state, the pressing member 110 moves downward in the vertical hole, so that the sliding block 120 abuts against the protruding area of the pressing member 110 relative to the recessed area 111, and the sliding block 120 is pushed to move to the radial outside, at this time, the clamping hook 102 is stretched out of the first slot hole, the opening of the clamping hook 102 is open, and the elastic member 90 can be detached.

[0046] Optionally, the second spring 112 is arranged between the pressing member 110 and the shaft core 10, and the second spring 112 is used to provide the elastic force of the pressing member 110 to restore the initial state, that is, to provide the elastic force of the pressing member 110 to move outward of the vertical hole. Optionally, the third spring 121 is arranged between the sliding block 120 and the second slot hole, and the third spring 121 is used to provide the elastic force of the sliding block 120 to move in the direction of the pressing member 110, that is, to provide the elastic force of the sliding block 120 to move radially into the first slot hole, the second slot hole and the third slot hole to the vertical hole.

[0047] Specifically, in the initial state when the pressing piece 110 is not pressed, one end of the elastic piece 90 is hung on the catch 102 on the rotating ring 100, and the other end is connected to the clasp ring 21 on the outer cam 20 through the sleeve ring. The elastic piece 90 is in a tension state, the opening of the catch 102 faces upward, but is blocked by the groove wall of the first slot hole, the elastic piece 90 cannot be taken out, the sliding block 120 abuts against the recessed area 111 of the pressing piece 110, and the catch 102 is accommodated in the first slot hole. When the pressing piece 110 is pressed, the pressing piece 110 moves downward in the vertical hole, the sliding block 120 abuts against the protruding area of the pressing piece 110, the sliding block 120 is pushed to move to the radial outside, the catch 102 extends out of the first slot hole, the opening of the catch 102 is open, and the elastic piece 90 is taken out of the catch 102 under the action of the elastic restoring force. Thus, after unlocking, the operator can directly take out the invalid elastic piece 90 from the clasp ring 21, install a new elastic piece 90, hang it on the clasp ring 21 and the catch 102 again, and restore the normal work of the rotating shaft. It should be noted that when installing the new elastic piece 90 on the catch 102, the catch 102 needs to be extended out of the first slot hole by pressing the pressing piece 110 first, and then the elastic piece 90 is hooked on the catch 102, and then the pressing piece 110 is released to make the catch 102 enter the first slot hole.

[0048] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, and modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the present application.

Claims

1. A high torque UAV shaft, characterized by: include: Shaft core, outer cam, inner cam, circlip, spring and housing; One end of the shaft core has a step, and the other end passes through the outer cam, inner cam and spring in sequence, and is fixedly engaged with the circlip. The spring is compressed and causes the outer cam and inner cam to engage reliably. The outer shell is barrel-shaped, and one open end is inserted and closed by the outer cam. The bottom of the barrel at the other end is passed through the shaft core and is located between the circlip and the spring, thereby enclosing the spring and the inner cam in the outer shell. Among them, the drone shaft also includes an abutment block and an adjustment component. The abutment block is arranged between the spring and the bottom of the barrel, and the abutment block is movably sleeved on the shaft core. The adjustment component is used to adjust the distance between the abutment block and the inner cam to change the compression amount of the spring.

2. The high-torque UAV shaft according to claim 1, characterized in that: An adjustment hole is axially provided at the other end of the shaft core; the adjustment assembly includes an adjustment screw threadedly connected to the adjustment hole; the abutment block includes a sliding portion arranged in the adjustment hole, a connecting portion radially extending from the outer periphery of the sliding portion and passing through the shaft core, and an abutment portion connected to the connecting portion and passing through one side of the shaft core, the sliding portion abuts against the end of the adjustment screw extending into the adjustment hole, and the abutment portion abuts against the spring; an opening corresponding to the sliding path of the connecting portion is axially provided on the shaft core.

3. The high-torque UAV shaft according to claim 1, characterized in that: The barrel bottom is provided with an electrically controlled telescopic member, the telescopic end of which is located between the abutment block and the barrel bottom, and which telescopically moves along the axial direction of the shaft core.

4. The high-torque UAV shaft according to claim 3, characterized in that: The drone shaft also includes a height sensor and a controller, and the controller is electrically connected to the electrically controlled telescopic part; when the height sensor detects that the flight height of the drone shaft is lower than a preset threshold, the controller controls the telescopic end of the electrically controlled telescopic part to extend a first distance; when the height sensor detects that the flight height of the drone shaft is not less than the preset threshold, the controller controls the telescopic end of the electrically controlled telescopic part to extend a second distance; wherein, the first distance is less than the second distance.

5. The high-torque UAV shaft according to claim 1, characterized in that: An elastic member is provided between the outer cam and the inner cam, one end of the elastic member is detachably connected to the outer cam, and the other end of the elastic member is detachably connected to the inner cam, and the elastic member is used to provide opposite pulling forces for the outer cam and the inner cam.

6. The high-torque UAV shaft according to claim 5, characterized in that: A rotating ring is provided on the outer circumference of the inner cam. The rotating ring is rotatably provided on the inner cam. The other end of the elastic member is detachably connected to the rotating ring.

7. The high-torque UAV shaft according to claim 6, characterized in that: A guide rod is provided between the rotating ring and the outer cam, and the guide rod is parallel to the shaft core; the guide rod is fixedly connected to the outer cam, and the guide rod passes through the rotating ring and is axially slidably connected to the rotating ring.

8. The high-torque UAV shaft according to claim 6, characterized in that: The rotating ring is provided with a hook, and the other end of the elastic member is hung on the hook.

9. The high-torque UAV shaft according to claim 8, characterized in that: The drone shaft includes a push-to-unlock mechanism, which includes a push piece and a response unlocking component. Both the push piece and the response unlocking component are arranged on the shaft core. When the push piece is operated, the response unlocking component is triggered to disengage the other end of the elastic piece from the hook.

10. The high-torque UAV shaft according to claim 1, characterized in that: The relative rotation angle between the outer cam and the inner cam is divided into three sections, namely, a closed section, a free section and an open section; when an external force is applied so that the relative angle between the outer cam and the inner cam is within the closed section, the drone shaft automatically closes after the external force is removed; when an external force is applied so that the relative angle between the outer cam and the inner cam is within the open section, the drone shaft automatically opens after the external force is removed; when an external force is applied so that the relative angle between the outer cam and the inner cam is within the free section, the drone shaft maintains the angle after the external force is removed.

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