A device for adjusting the balance of a propeller of an unmanned aerial vehicle

Abstract

This invention discloses a dynamic balance adjustment counterweight device for unmanned aerial vehicle (UAV) propellers, relating to the field of UAV technology. It includes a propeller base with propeller blades fixedly connected to both sides, a propeller shaft fixedly connected to the bottom of the base, and a counterweight fixedly connected to the bottom of the base. The counterweight consists of an upper annular seat, a lower annular seat, and two adjustment modules. The lower annular seat is detachably and fixedly connected to the bottom of the upper annular seat. Each adjustment module includes a housing with a cover on top, and an insert fixedly connected to the top of the cover. By directly installing a ring-shaped counterweight at the bottom of the propeller base, without any special protrusions, turbulence problems are effectively avoided. It is also applicable to different propeller models, offering wider applicability. The adjustment modules can adjust the counterweight by adding counterweight liquid or filling counterweight plates, resulting in higher adjustment precision. Furthermore, the counterweight is less likely to fall off after adjustment, making it safer to use and facilitating large-scale adoption.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a UAV propeller dynamic balance adjustment counterweight device. Background Technology

[0002] As the core component for power output, the dynamic balance performance of a drone's propeller directly determines its flight quality. During propeller manufacturing and assembly, factors such as uneven material density, machining accuracy deviations, and assembly errors can easily lead to mass eccentricity during propeller rotation, generating alternating loads and subsequently causing fuselage vibration. This vibration not only affects the drone's flight stability and control precision but also accelerates the wear of components such as motors, bearings, and frames, shortening the drone's lifespan. In severe cases, it can even lead to propeller breakage and the drone losing control and crashing. Currently, there are two main types of dynamic balance adjustment methods for drone propellers: one type involves adjusting the counterweight by attaching counterweight patches, adding washers, or replacing fixing screws with different weights. This method is cumbersome, has low counterweight accuracy, and the counterweights are prone to falling off. It cannot meet the dynamic balance adjustment needs during drone flight. Furthermore, it is difficult to fine-tune the counterweight after adjustment, has poor versatility, requires special counterweights for different propeller models, and the added counterweights can easily cause turbulence problems. The other type involves removing excess mass by grinding and trimming the propeller blades. This method damages the structural integrity of the propeller, reduces blade strength, and makes it difficult to control the adjustment accuracy, which can easily lead to propeller failure.

[0003] To address the aforementioned issues, this application proposes a dynamic balance adjustment counterweight device for unmanned aerial vehicle (UAV) propellers. Summary of the Invention

[0004] This invention provides a counterweight device for dynamic balance adjustment of unmanned aerial vehicle (UAV) propellers to solve the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention provides a dynamic balance adjustment counterweight device for UAV propellers, including a propeller base, on both sides of the propeller base a propeller blade is fixedly connected, a propeller shaft is fixedly connected to the bottom of the propeller base, and a counterweight is fixedly connected to the bottom of the propeller base, the counterweight being sleeved on the outside of the propeller shaft. The counterweight consists of an upper ring seat, a lower ring seat, and two adjustment modules. The lower ring seat is detachably and fixedly connected to the bottom of the upper ring seat, and the adjustment modules are slidably connected between the upper ring seat and the lower ring seat. The adjustment module includes a box body, the top of which is provided with a box cover, and an insert is fixedly connected to the top of the box cover.

[0006] Preferably, the upper annular seat includes an upper annular plate, and an internally threaded sleeve is fixedly connected to the bottom of the upper annular plate.

[0007] Preferably, the top of the upper ring plate has multiple recessed holes, and the insert is interference-fitted and embedded inside the recessed holes.

[0008] Preferably, the lower annular seat includes a lower annular plate, and an external threaded sleeve and a side annular plate are fixedly connected to the top of the lower annular plate. The external threaded sleeve is located inside the side annular plate and is threadedly connected to the inside of the internal threaded sleeve. The adjustment module is located between the internal threaded sleeve and the side annular plate.

[0009] Preferably, a plurality of T-shaped sliding sleeves are fixedly connected to the outer side of the internal threaded sleeve, and the plurality of T-shaped sliding sleeves correspond to a plurality of upper ring plates respectively. A T-shaped slider is fixedly connected to one side of the box body, and the T-shaped slider is adapted to be connected inside the T-shaped sliding sleeve.

[0010] Preferably, the box body is filled with a sponge block, and the sponge block is soaked in a counterweight liquid. A first rubber block is fixedly connected to the bottom of the box cover, and the first rubber block is located inside the upper annular seat.

[0011] Preferably, the box body is provided with multiple counterweight plates inside, and a second rubber block is provided below the box cover. The second rubber block is located inside the box body and presses on the top of the uppermost counterweight plate. Multiple springs are fixedly connected between the box cover and the second rubber block.

[0012] Preferably, the upper annular seat is fixed to the bottom of the paddle seat with adhesive, and the diameter of the counterweight is not greater than the diameter of the paddle seat.

[0013] Preferably, the number of the embedded holes is set to twelve, and the central axes of the ring plate with twelve or more embedded holes are distributed in a ring array at equal intervals.

[0014] Compared with related technologies, the UAV propeller dynamic balance adjustment counterweight device provided by the present invention has the following beneficial effects: 1. By directly installing a ring-shaped counterweight at the bottom of the propeller base, without any special protrusions, turbulence problems are effectively avoided. It can also be used with different types of propellers, making it more versatile. The adjustment module can adjust the counterweight by adding counterweight liquid or filling counterweight plates, which provides higher adjustment accuracy. The counterweight is also less likely to fall off after adjustment, making it safer to use and conducive to large-scale promotion and use.

[0015] 2. The counterweight features a ring array of twelve recessed holes and a T-shaped sliding sleeve, allowing it to accommodate common propeller blade counts such as two-bladed, three-bladed, and four-bladed propellers for corresponding installation and adjustment modules, thus broadening its application range and increasing its adaptability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the counterweight structure of the present invention; Figure 4 This is an exploded view of the counterweight of the present invention; Figure 5 Front view sectional view of the adjustment module of the present invention Figure 1 ; Figure 6 The regulating module of the present invention exploded. Figure 1 ; Figure 7 Front view sectional view of the adjustment module of the present invention Figure 2 ; Figure 8 The regulating module of the present invention exploded. Figure 2 .

[0017] The following are the labeling elements in the diagram: 1. Paddle mount, 2. Paddle blade, 3. Paddle shaft, 4. Counterweight, 41. Upper annular seat, 411. Upper annular plate, 412. Internal threaded sleeve, 413. Embedded hole, 42. Lower annular seat, 421. Lower annular plate, 422. External threaded sleeve, 423. Side annular plate, 43. Adjustment module, 431. Box body, 432. Box cover, 433. Insert block, 434. First rubber block, 435. Sponge block, 436. Spring, 437. Second rubber block, 438. Counterweight plate, 44. T-shaped slider, 45. T-shaped sliding sleeve. Detailed Implementation

[0018] Please see Figure 1-8 The technical solution provided by the present invention specifically includes the following embodiments:

[0019] Example 1: A dynamic balance adjustment counterweight device for a drone propeller, including a propeller base 1, with propeller blades 2 fixedly connected to both sides of the propeller base 1, a propeller shaft 3 fixedly connected to the bottom of the propeller base 1, and a counterweight 4 fixedly connected to the bottom of the propeller base 1, the counterweight 4 being sleeved on the outside of the propeller shaft 3. The counterweight 4 consists of an upper ring seat 41, a lower ring seat 42 and two adjustment modules 43. The lower ring seat 42 is detachably and fixedly connected to the bottom of the upper ring seat 41, and the adjustment module 43 is limited and slidably connected between the upper ring seat 41 and the lower ring seat 42.

[0020] The adjustment module 43 includes a box body 431, and a box cover 432 is provided on the top of the box body 431. An insert 433 is fixedly connected to the top of the box cover 432.

[0021] The upper annular seat 41 includes an upper annular plate 411, with an internally threaded sleeve 412 fixedly connected to the bottom of the upper annular plate 411. The top of the upper annular plate 411 has multiple recessed holes 413, and the insert block 433 is interference-fitted into the recessed holes 413. The lower annular seat 42 includes a lower annular plate 421, with an externally threaded sleeve 422 and a side annular plate 423 fixedly connected to the top of the lower annular plate 421. The externally threaded sleeve 422 is located inside the side annular plate 423 and is threadedly connected to the internally threaded sleeve 412. The adjustment module 43 is located between the internally threaded sleeve 412 and the side annular plate 423.

[0022] Both the recess 413 and the insert 433 are fitted rectangular shapes. Therefore, after the insert 433 is inserted into the recess 413, the lid 432 will not change its angle, but will precisely correspond to the box body 431.

[0023] Multiple T-shaped sliding sleeves 45 are fixedly connected to the outer side of the internal threaded sleeve 412. The multiple T-shaped sliding sleeves 45 correspond to multiple upper ring plates 411 respectively. A T-shaped slider 44 is fixedly connected to one side of the box body 431. The T-shaped slider 44 is adapted to be connected inside the T-shaped sliding sleeve 45. Through the cooperation of the T-shaped slider 44 and the T-shaped sliding sleeve 45, the adjustment module 43 can only move up and down in the counterweight 1, so that the adjustment module 43 can accurately correspond to the blade. At the same time, when the lower ring seat 42 is tightened, it can also be pushed by it to push the box body 431 upward to contact and seal with the box cover 432. At the same time, it also clamps the adjustment module 43, improving its stability.

[0024] The box body 431 is filled with a sponge block 435, and the sponge block 435 is soaked in a counterweight liquid. The bottom of the box cover 432 is fixedly connected to a first rubber block 434, which is located inside the upper annular seat 41. By immersing the counterweight liquid in the sponge block 435, the problem of the counterweight liquid rolling and flowing in the box body 431 when there is a small amount can be avoided. The counterweight liquid can be water or other substances. The first rubber block 434 can seal the inside of the box body 431 to prevent the counterweight liquid inside from being thrown out.

[0025] The upper annular seat 41 is glued to the bottom of the propeller seat 1, and the diameter of the counterweight 4 is not greater than the diameter of the propeller seat 1. The counterweight 4 is a closed ring and has no special protrusions after being glued to the bottom of the propeller seat 1. Therefore, it will not cause turbulence when the propeller rotates, and can ensure the stability of the propeller during operation.

[0026] The number of the embedded holes 413 is set to twelve, and the central axis of the ring plate 411 with the twelve embedded holes 413 and above is distributed in a ring array at equal intervals. Since the T-shaped sliding sleeves 45 correspond one-to-one with the embedded holes 413, the number of T-shaped sliding sleeves 45 is also twelve, and they are distributed at equal intervals. This layout can make its overall center of gravity central and will not have the problem of center of gravity deviation. The common number of propeller blades is usually two, three, and four blades. This layout can be used for counterweight adjustment of propellers with different numbers of blades.

[0027] Example 2: See Figure 7 and Figure 8 Based on Embodiment 1, the box body 431 is provided with multiple counterweight plates 438 inside, and a second rubber block 437 is provided below the box cover 432. The second rubber block 437 is located inside the box body 431 and presses on the top of the uppermost counterweight plate 438. Multiple springs 436 are fixedly connected between the box cover 432 and the second rubber block 437. In addition to adding counterweight liquid in Embodiment 1, the counterweight plate 438 can also be placed directly inside the box body 431. In order to improve the stability of the counterweight plate 438, the second rubber block 437 is pressed on the counterweight plate 438 by the springs 436 to prevent the counterweight plate 438 from shaking during propeller rotation.

[0028] Working principle:

[0029] When in use, the counterweight 4 is glued to the bottom of the propeller base 1, and the counterweight 4 is kept coaxial with the propeller base 1 and the propeller shaft 3. Then, the propeller is initially tested for dynamic balance using testing equipment to obtain correction data.

[0030] After obtaining the correction data, rotate the lower ring seat 42 downward to move it away from the upper ring seat 41. During this process, the adjustment module 43 is exposed. Since there is no support or restriction from the lower ring plate 421, the box body 431 can be pushed downward until the box cover 432 no longer blocks the top of the box body 431.

[0031] If the counterweight is adjusted within a small range, a sponge block 435 can be inserted into the box 431, and then counterweight liquid can be dripped into the box 431. The counterweight liquid will soak into the sponge block 435 and will not flow randomly. After the counterweight is adjusted, the lower ring seat 42 can be rotated directly to move it upward. During this process, the lower ring plate 421 can support the box 431 to move it upward until the box 431 moves to the bottom of the box cover 432. The first rubber block 434 is then embedded inside the box 431 to seal its interior. At this time, the upper ring seat 41 and the lower ring seat 42 are completely connected to form a sealed ring.

[0032] If the counterweight is adjusted over a large range, the required number of counterweight pieces 438 can be inserted into the box body 431. The weight of the counterweight pieces 438 can be set according to the requirements. After the counterweight is adjusted, the lower ring seat 42 can be rotated directly to move it upward. During this process, the lower ring plate 421 can support the box body 431 to move it upward until the box body 431 moves to the bottom of the box cover 432. The first rubber block 434 is embedded inside the box body 431 and is pushed by the elastic force of the spring 436 to press on the multiple counterweight pieces 438 to prevent it from shaking. At this time, the upper ring seat 41 and the lower ring seat 42 are completely connected to form a closed ring.

[0033] Correction data can be repeatedly acquired and the final dynamic balance can be adjusted by adding or removing counterweight liquid or counterweight plate 438.

Claims

1. A counterweight device for dynamic balancing of a drone propeller, comprising a propeller base (1), on both sides of the propeller base (1) being fixedly connected to propeller blades (2), and a propeller shaft (3) being fixedly connected to the bottom of the propeller base (1), characterized in that: A counterweight (4) is fixedly connected to the bottom of the propeller seat (1), and the counterweight (4) is sleeved on the outside of the propeller shaft (3). The counterweight (4) consists of an upper ring seat (41), a lower ring seat (42) and two adjustment modules (43). The lower ring seat (42) is detachably and fixedly connected to the bottom of the upper ring seat (41), and the adjustment module (43) is slidably connected between the upper ring seat (41) and the lower ring seat (42). The adjustment module (43) includes a box body (431), the top of the box body (431) is provided with a box cover (432), and an insert (433) is fixedly connected to the top of the box cover (432).

2. The UAV propeller dynamic balance adjustment counterweight device according to claim 1, characterized in that, The upper annular seat (41) includes an upper annular plate (411), and an internally threaded sleeve (412) is fixedly connected to the bottom of the upper annular plate (411).

3. The UAV propeller dynamic balance adjustment counterweight device according to claim 2, characterized in that, The top of the upper ring plate (411) has multiple recessed holes (413), and the insert (433) is interference-fitted and embedded in the recessed holes (413).

4. The UAV propeller dynamic balance adjustment counterweight device according to claim 2, characterized in that, The lower annular seat (42) includes a lower annular plate (421), and an external threaded sleeve (422) and a side annular plate (423) are fixedly connected to the top of the lower annular plate (421). The external threaded sleeve (422) is located inside the side annular plate (423), and the external threaded sleeve (422) is threadedly connected to the inside of the internal threaded sleeve (412). The adjustment module (43) is located between the internal threaded sleeve (412) and the side annular plate (423).

5. The UAV propeller dynamic balance adjustment counterweight device according to claim 3, characterized in that, Multiple T-shaped sliding sleeves (45) are fixedly connected to the outside of the internal threaded sleeve (412). The multiple T-shaped sliding sleeves (45) correspond to multiple upper ring plates (411) respectively. A T-shaped slider (44) is fixedly connected to one side of the box body (431). The T-shaped slider (44) is adapted to be connected inside the T-shaped sliding sleeve (45).

6. The UAV propeller dynamic balance adjustment counterweight device according to claim 1, characterized in that, The box body (431) is filled with a sponge block (435), and the sponge block (435) is soaked in a counterweight liquid. The bottom of the box cover (432) is fixedly connected to a first rubber block (434), which is located inside the upper annular seat (41).

7. The UAV propeller dynamic balance adjustment counterweight device according to claim 1, characterized in that, The box body (431) is provided with multiple counterweights (438) inside. The box cover (432) is provided with a second rubber block (437) below it. The second rubber block (437) is located inside the box body (431) and presses on the top of the uppermost counterweight (438). Multiple springs (436) are fixedly connected between the box cover (432) and the second rubber block (437).

8. The UAV propeller dynamic balance adjustment counterweight device according to claim 1, characterized in that, The upper annular seat (41) is glued to the bottom of the paddle seat (1), and the diameter of the counterweight (4) is not greater than the diameter of the paddle seat (1).

9. A counterweight device for dynamic balancing of UAV propellers according to claim 2, characterized in that, The number of the embedded holes (413) is set to twelve, and the central axis of the ring plate (411) above the twelve embedded holes (413) is distributed in a ring array at equal intervals.

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