Quick-release paddle clamp structure

Abstract

This application relates to a quick-release propeller clamp structure, including a chassis connected to a motor turntable, with a positioning shaft vertically positioned at the center of the chassis; it also includes a lower bushing and an upper bushing, which clamp the propeller blades and mount them onto the positioning shaft. A positioning pin and a first spring are provided between the chassis and the lower bushing; the top of the positioning shaft has an annular groove, and an inner ball cage and an outer ball basket abutting against the upper bushing are fitted onto the top of the positioning shaft. The side of the inner ball cage has a bead hole, and a steel ball capable of engaging with the annular groove is provided in the bead hole. This utility model belongs to the field of unmanned aerial vehicle technology, and achieves extremely rapid assembly and disassembly of the propeller blades through mechanical interlocking, greatly improving maintenance efficiency.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle technology, and in particular to a quick-release propeller clamp structure. Background Technology

[0002] Drone propellers are a crucial component of drones, and their performance and stability directly affect the overall performance and mission success of the drone. Propellers are typically fixed to the drone's drive system using screws and washers. While this method is simple in structure, it suffers from inconvenient disassembly and assembly, requires specialized tools, and the connection reliability is easily affected by vibration. After a period of flight, the screws need to be removed for propeller maintenance or replacement. The process of removing and installing screws is time-consuming and extremely inconvenient, and screws are easily lost during disassembly. These factors limit the efficiency of drone maintenance and its lifespan. The inefficiency of traditional methods is particularly pronounced in applications requiring frequent propeller replacements (such as transportation, maintenance, and replacement of different propeller models).

[0003] Therefore, there is an urgent need for a paddle clamp structure that can achieve quick assembly and disassembly, reliable connection, and anti-loosening function. Utility Model Content

[0004] Therefore, it is necessary to provide a quick-release propeller clamp structure, the specific technical solution of which is as follows.

[0005] A quick-release paddle clamp structure includes a chassis connected to a turntable of a motor, wherein a positioning shaft is vertically disposed at the center of the chassis; It also includes a lower liner and an upper liner, which clamp the blade and then sleeve it on the positioning shaft. A positioning pin and a first spring are provided between the chassis and the lower liner. The top of the positioning shaft is provided with an annular groove, and the top of the positioning shaft is fitted with an inner ball cage and an outer ball basket that abuts against the upper liner. The side of the inner ball cage is provided with a bead hole, and the bead hole contains a steel ball that can engage with the annular groove.

[0006] Furthermore, the outer ball basket includes a first straight cylinder at the top and a first conical cylinder at the bottom, the inner conical surface of the first conical cylinder abutting against the outer side of the steel ball, and the distance between the positioning shaft and the inner wall of the first straight cylinder is equal to the diameter of the steel ball.

[0007] Furthermore, the bottom end of the first conical cylinder is provided with a first guide hole that is adapted to the positioning shaft, and the bottom end face of the first conical cylinder abuts against the top surface of the upper bushing.

[0008] Furthermore, the inner ball cage includes a second straight cylinder at the top and a second conical cylinder at the bottom. The ball hole is provided on the inclined wall of the second conical cylinder. The bottom end of the second conical cylinder is provided with a second guide hole that is adapted to the positioning shaft. The distance between the outer wall of the second straight cylinder and the inner wall of the first straight cylinder is equal to the diameter of the steel ball.

[0009] Furthermore, the outer basket is provided with a protective cover connected to the upper liner, and a second spring is provided between the top wall of the protective cover and the steel ball.

[0010] Furthermore, the top wall inside the protective cover is provided with a positioning post, the second spring is sleeved on the positioning post, and the bottom end of the second spring is provided with a compression ring that can abut against the steel ball. The outer wall of the compression ring is a conical structure.

[0011] Furthermore, the bottom of the protective cover is provided with a flange structure that abuts against the top surface of the upper liner, and the flange structure is provided with a first bolt structure that connects to the upper liner.

[0012] Furthermore, the chassis is provided with a second bolt structure for connecting to the turntable of the motor. A first stepped hole with a larger lower end and a smaller upper end is provided through the chassis. A first pin hole is provided through the lower bushing. The positioning pin passes through the first stepped hole from bottom to top and is then inserted into the first pin hole.

[0013] Furthermore, a locking element is provided between the bottom liner and the upper liner and the blade. A second stepped hole with a larger lower end and a smaller upper end is provided through the lower liner. A through hole is provided through the blade. A locking hole is provided in the upper liner. The locking element is a third bolt structure that passes through the second stepped hole and the through hole from bottom to top and is threadedly connected to the locking hole.

[0014] Furthermore, the first spring is a wave spring sleeved on the positioning pin and located between the top surface of the chassis and the bottom surface of the lower bushing.

[0015] Compared with existing technologies, this utility model has the following beneficial effects: The quick-release propeller clamp structure of this utility model achieves rapid disassembly and assembly of propeller blades through mechanical interlocking (steel ball-slot), greatly improving maintenance efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the quick-release paddle clamp structure of this utility model; Figure 2 This is an exploded top view of the quick-release paddle clamp structure of this utility model. Figure 3 This is a cross-sectional view of the quick-release paddle clamp structure of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Motor; 2. Second bolt structure; 3. Locating pin; 4. Chassis; 401. Locating shaft; 402. Annular groove; 5. Locking element; 6. First spring; 7. Lower bushing; 8. Blade; 9. Upper bushing; 10. Outer ball basket; 11. Steel ball; 12. Inner ball cage; 1201. Ball hole; 13. Extrusion ring; 14. Second spring; 15. Protective cover; 1501. Locating post; 16. First bolt structure. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0020] The embodiments of this utility model will be described below based on its overall structure.

[0021] Reference Figures 1-3 As shown, this embodiment provides a quick-release propeller clamp structure, including a chassis 4 connected to a turntable at the output end of a motor 1, with a positioning shaft 401 vertically positioned at the center of the chassis 4; it also includes a lower bushing 7 and an upper bushing 9, which clamp the propeller blade 8 and mount it onto the positioning shaft 401. A positioning pin 3 and a first spring 6 are provided between the chassis 4 and the lower bushing 7. The positioning pin 3 is used for circumferential positioning and transmission. A locking mechanism is provided between the lower bushing 7 and the upper bushing 9 and the propeller blade 8. Component 5; The top of the positioning shaft 401 is provided with an annular groove 402, and the top of the positioning shaft 401 is fitted with an inner ball cage 12 and an outer ball basket 10 that abuts against the upper bushing 9. The side of the inner ball cage 12 is provided with a bead hole 1201, and a steel ball 11 that can engage with the annular groove 402 is provided in the bead hole 1201. The outer ball basket 10 is provided with a protective cover 15 that is connected to the upper bushing 9. A second spring 14 is provided between the top wall of the protective cover 15 and the steel ball 11.

[0022] The quick-release paddle clamp structure of this utility model consists of a chassis 4 and a positioning shaft 401 forming a motor connection assembly that connects to the turntable of the motor 1. Based on the chassis 4 connected to the turntable of the motor 1, the positioning shaft 401 at its center provides centering and main support for the entire structure. The lower bushing 7 and the upper bushing 9 together clamp the blade 8, and the locking member 5 makes the blade 8, the lower bushing 7 and the upper bushing 9 form the blade body part, and the blade body part can be integrally installed on the motor connection assembly. The outer ball basket 10 and the inner ball cage 12 are axially locked by the engagement of the steel ball 11 on the inner ball cage 12 with the annular groove 402 of the positioning shaft 401. The outer ball basket 10 restricts the radial movement of the steel ball 11, and the second spring 14 in the protective cover 15 continuously provides a clamping force, so that the steel ball 11 is engaged in the annular groove 402 and the steel ball 11 exerts a downward force on the outer ball basket 10. The first spring 6 exerts an upward force on the blade body, so that the upper bushing 9 of the blade body keeps the outer ball basket 10 upright. The outer ball basket 10 exerts a force on the steel ball 11, restricting the radial movement of the steel ball 11 and ensuring a stable locking state.

[0023] During installation, the chassis 4 is mounted on the motor 1, the positioning pin 3 is vertically mounted on the chassis 4, the main body of the blade composed of the lower bushing 7, the upper bushing 9 and the blade 8 is sleeved on the positioning shaft 401, the pin control on the lower bushing 7 cooperates with the positioning pin 3 to realize that the main body of the blade and the chassis 4 can rotate synchronously; the first spring 6 is located between the lower bushing 7 and the chassis 4. Steel ball 11 is installed on inner ball cage 12. Outer ball basket 10 and inner ball cage 12 are sequentially fitted onto the top of positioning shaft 401. Protective cover 15 is fixed to upper bushing 9. Second spring 14 inside protective cover 15 compresses steel ball 11. Pressing down on protective cover 15 by hand lowers the blade body to a certain distance, which compresses first spring 6 and slightly lowers the height of blade body. Steel ball 11 on inner ball cage 12 descends and, under the compression of second spring 14, can slide into annular groove 402, achieving axial positioning of inner ball cage 12 and positioning shaft 401. Releasing protective cover 15 causes blade body to rise, pushing outer ball basket 10 upward. The sleeve wall of outer ball basket 10 applies force to the outside of steel ball 11, restricting radial movement of steel ball 11 and maintaining a locked state. Finally, protective cover 15 is fixedly installed on upper bushing 9.

[0024] During disassembly, press down on the cover 15 to move the outer ball basket 10 downwards. Its inner wall will no longer compress the steel ball 11, allowing the steel ball 11 to move radially outwards. Using a ring magnet placed on the outside of the cover 15, the steel ball 11 can be pulled out of the annular groove 402, separating it from the positioning shaft 401. At this point, as shown in the attached... Figure 3As shown, the steel ball 11 is located in the gap between the inner wall of the outer ball cage 10 and the cylindrical surface of the positioning shaft 401, so that the inner ball cage 12 and the positioning shaft 401 can move axially relative to each other, thereby lifting the protective cover 15 upward and causing the blade body to slide upward out of the positioning shaft 401, thus realizing the quick disassembly of the blade 8.

[0025] The quick-release propeller clamp structure of this utility model achieves rapid disassembly and assembly of propeller blades through mechanical interlocking (steel ball-slot), greatly improving maintenance efficiency.

[0026] Specifically, the outer ball basket 10 includes a first straight cylinder at the top and a first conical cylinder at the bottom. The inner conical surface of the first conical cylinder abuts against the outer side of the steel ball 11. The distance between the positioning shaft 401 and the inner wall of the first straight cylinder is equal to the diameter of the steel ball 11. The first guide hole cooperates with the positioning shaft to ensure that the outer ball basket will not deviate during axial movement and will always remain concentric with the positioning shaft. Its bottom end face abuts against the upper bushing, so that the outer ball basket and the entire blade assembly move synchronously. The preload force of the first spring 6 pressing upward on the entire blade assembly is also applied to the outer ball basket.

[0027] Specifically, the bottom end of the first conical cylinder is provided with a first guide hole adapted to the positioning shaft 401, and the bottom end face of the first conical cylinder abuts against the top surface of the upper bushing 9. In this embodiment, the inclined inner wall of the first conical cylinder forms an inclined surface mechanism. Under the action of the first spring 6, the first conical cylinder remains in an upward-push state, maintaining the compression of the outer wall of the steel ball 11, thereby limiting the steel ball 11 and keeping it engaged with the annular groove 402. When the blade assembly is pulled downward, the outer ball basket 10 moves downward relative to the positioning shaft 401. At this time, no radial force is applied to the steel ball 11, and the steel ball 11 can be removed from the annular groove by using a magnet to attract it, thus unlocking it. This makes the unlocking operation very intuitive, labor-saving, and effective, laying the structural foundation for the "quick release" function.

[0028] Specifically, the inner ball cage 12 includes a second straight cylinder at the top and a second conical cylinder at the bottom. The ball hole 1201 is located on the inclined wall of the second conical cylinder, and the bottom end of the second conical cylinder has a second guide hole adapted to the positioning shaft 401. The second guide hole serves to guide and concentrically position the ball. The second conical cylinder is parallel to the first conical cylinder. The key point is the design of the spacing, which allows half of the steel ball to protrude outside the inner ball cage and engage with the annular groove, while the other half is constrained in the cavity between the inner and outer cylinders. This precisely restricts the movement of the steel ball, preventing it from falling out while allowing it to smoothly contract and eject radially.

[0029] Specifically, the top wall inside the protective cover 15 is provided with a positioning post 1501, and the second spring 14 is sleeved on the positioning post 1501. The positioning post 1501 prevents the second spring 14 from deflecting.

[0030] Specifically, the bottom end of the second spring 14 is provided with a compression ring 13 that can abut against the steel ball 11. The outer wall of the compression ring 13 is a conical structure, which can be adapted to the conical wall of the second conical cylinder of the inner ball cage 12. The compression ring 13 is used to apply uniformly distributed pressure to each steel ball 11 to ensure that each steel ball is subjected to consistent force, improve the uniformity of pressure distribution, and extend service life.

[0031] Specifically, the bottom of the protective cover 15 is provided with a flange structure that abuts against the top surface of the upper liner 9. The flange structure is provided with a first bolt structure 16 that connects to the upper liner 9. The flange structure at the bottom of the protective cover is connected to the upper liner through the first bolt. The flange structure increases the contact area and the bolt connection is reliable.

[0032] Specifically, the chassis 4 is provided with a second bolt structure 2 that connects to the turntable of the motor 1. A first stepped hole with a larger lower end and a smaller upper end is provided through the chassis 4. A first pin hole is provided through the lower liner 7. The positioning pin 3 passes through the first stepped hole from bottom to top and is inserted into the first pin hole. The chassis 4 is provided with a second bolt structure 2 that connects to the motor. The chassis is provided with a first stepped hole. The positioning pin passes through from bottom to top. The stepped hole accommodates the pin head to ensure flatness of the installation. The positioning pin is inserted from the motor side, which optimizes the spatial layout and makes the whole structure compact, small in size and space-saving.

[0033] Specifically, the lower bushing 7 has a second stepped hole that is larger at the bottom and smaller at the top, the blade 8 has a through hole, the upper bushing 9 has a locking hole, and the locking member 5 is a third bolt structure that passes through the second stepped hole and through hole from bottom to top and is threaded to the locking hole. The third bolt structure provides a strong radial clamping force. In actual use, it is tightened with tools to ensure the reliability of blade clamping and to ensure torque transmission.

[0034] Specifically, the first spring 6 is a wave spring sleeved on the positioning pin 3 and located between the top surface of the chassis 4 and the bottom surface of the lower liner 7. The first spring sleeved on the positioning pin and located between the top surface of the chassis and the bottom surface of the lower liner provides a continuous upward preload, automatically compensates for wear gaps, eliminates transmission gaps, ensures smooth operation, and reduces vibration.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments only illustrate one or more implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A quick-release paddle clamp structure, characterized in that, The system includes a chassis (4) connected to a turntable at the output end of a motor (1), and a positioning shaft (401) is vertically provided at the center of the chassis (4); it also includes a lower bushing (7) and an upper bushing (9), which clamp the blade (8) and then mount it on the positioning shaft (401). A positioning pin (3) and a first spring (6) are provided between the chassis (4) and the lower bushing (7); the top of the positioning shaft (401) is provided with an annular groove (402), and the top of the positioning shaft (401) is fitted with an inner ball cage (12) and an outer ball basket (10) that abuts against the upper bushing (9). The side of the inner ball cage (12) is provided with a bead hole (1201), and a steel ball (11) that can engage with the annular groove (402) is provided in the bead hole.

2. The quick-release paddle clamp structure according to claim 1, characterized in that, The outer basket (10) includes a first straight cylinder at the top and a first conical cylinder at the bottom. The inner conical surface of the first conical cylinder abuts against the outer side of the steel ball (11). The distance between the positioning shaft (401) and the inner wall of the first straight cylinder is equal to the diameter of the steel ball (11).

3. The quick-release paddle clamp structure according to claim 2, characterized in that, The bottom end of the first conical cylinder is provided with a first guide hole that is adapted to the positioning shaft (401), and the bottom end face of the first conical cylinder abuts against the top surface of the upper liner (9).

4. The quick-release paddle clamp structure according to claim 3, characterized in that, The inner ball cage (12) includes a second straight cylinder at the top and a second conical cylinder at the bottom. The bead hole (1201) is provided on the inclined wall of the second conical cylinder, and the bottom end of the second conical cylinder is provided with a second guide hole that is adapted to the positioning shaft (401).

5. The quick-release paddle clamp structure according to any one of claims 1 to 4, characterized in that, The outer basket (10) is provided with a protective cover (15) connected to the upper liner (9) on its periphery, and a second spring (14) is provided between the top wall of the protective cover (15) and the steel ball (11).

6. The quick-release paddle clamp structure according to claim 5, characterized in that, The top wall inside the protective cover (15) is provided with a positioning post (1501), and the second spring (14) is sleeved on the positioning post (1501). The bottom end of the second spring (14) is provided with a compression ring (13) that can abut against the steel ball (11). The outer wall of the compression ring (13) is a conical structure.

7. The quick-release paddle clamp structure according to claim 5, characterized in that, The bottom of the cover (15) is provided with a flange structure that abuts against the top surface of the upper liner (9), and the flange structure is provided with a first bolt structure (16) that connects to the upper liner (9).

8. The quick-release paddle clamp structure according to claim 7, characterized in that, The chassis (4) is provided with a second bolt structure (2) that is connected to the turntable of the motor (1). The chassis (4) is provided with a first stepped hole that is larger at the bottom and smaller at the top. The lower liner (7) is provided with a first pin hole. The positioning pin (3) passes through the first stepped hole from bottom to top and is inserted into the first pin hole.

9. The quick-release paddle clamp structure according to claim 8, characterized in that, A locking element (5) is provided between the lower bushing (7) and the upper bushing (9) and the blade (8). The lower bushing (7) has a second stepped hole that is larger at the bottom and smaller at the top. The blade (8) has a through hole. The upper bushing (9) has a locking hole. The locking element (5) is a third bolt structure that passes through the second stepped hole and through hole from bottom to top and is threaded to the locking hole.

10. The quick-release paddle clamp structure according to claim 8, characterized in that, The first spring (6) is a wave spring sleeved on the positioning pin (3) and located between the top surface of the chassis (4) and the bottom surface of the lower liner (7).

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