Lightweight reduction gearbox for unmanned aerial vehicle
Patent Information
- Application Number
- CN202522308778.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0003]其中，现有无人机上减速箱的重量较重，导致无人机续航能力降低，负载能力下降，故需针对该问题进行解决
[0021]1、通过在动力输入轴上设置第一减重孔，且在动力输出轴设置第二减重孔，可以极大降低减速箱的重量，实现减速箱的轻量化，从而可以减少对无人机负载与续航的不利影响，显著提升无人机续航能力与有效负载利用率。
Smart Images
Figure CN224800895U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gearbox technology, and in particular to a lightweight gearbox for unmanned aerial vehicles (UAVs). Background Technology
[0002] In existing technologies, traditional drone applications commonly involve lifting operations (such as material transport and equipment deployment). A drone typically consists of a fuselage, a gearbox, and a rotating part rotatably mounted on the fuselage. The gearbox, located on the fuselage, has a power input shaft, a reduction mechanism, and a power output shaft. The motor's output is connected to the power input shaft, which in turn connects to the power output shaft via the reduction mechanism. The power output shaft is then connected to the rotating part. The motor drives the power input shaft, which in turn drives the power output shaft via the reduction mechanism, ultimately rotating the rotating part.
[0003] One issue is that the weight of the gearbox on existing drones is relatively heavy, which reduces the drone's endurance and payload capacity. Therefore, this problem needs to be addressed. Utility Model Content
[0004] In view of this, the present invention provides a lightweight gearbox for drones, and the main technical problem to be solved is: how to reduce the weight of the gearbox.
[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:
[0006] This utility model provides a lightweight gearbox for a drone, comprising a housing for fixing to the drone's body, a reduction mechanism inside the housing, a power input shaft at one end of the housing for connecting to the output end of a motor, and a power output shaft at the other end of the housing for connecting to a rotating part on the drone's body. The power input shaft is connected to the power output shaft via the reduction mechanism, and the power input shaft rotates under the drive of the motor's output end, thereby driving the power output shaft to rotate through the reduction mechanism, which in turn drives the rotating part on the drone's body to rotate.
[0007] The power input shaft is provided with a first weight reduction hole, and the power output shaft is provided with a second weight reduction hole.
[0008] In some embodiments, the first weight reduction hole is a blind hole, which passes through one end of the power input shaft opposite to the reduction mechanism. The end of the power input shaft opposite to the reduction mechanism is provided with a flange to connect to the output end of the motor through the flange.
[0009] And / or, the second weight reduction hole is a blind hole, and the second weight reduction hole passes through the end of the power output shaft near the reduction mechanism.
[0010] In some embodiments, an internal gear ring is fixed on the housing, and the reduction mechanism includes a drive gear and a planetary gear. The drive gear is fixed on the power input shaft to achieve the connection between the reduction mechanism and the power input shaft.
[0011] The planetary gear meshes between the transmission teeth of the internal gear ring and the driving gear. The housing is also provided with a movable gear frame. A connecting gear frame is fixed on the power output shaft. One end of the planetary gear shaft is rotatably mounted on the movable gear frame. The other end of the planetary gear shaft is rotatably mounted on the connecting gear frame to realize the connection between the reduction mechanism and the power output shaft.
[0012] The driving gear of the reduction mechanism is used to rotate under the drive of the power input shaft, so as to drive the planetary gear to revolve around the axis of the power input shaft, and the planetary gear drives the movable gear frame and the connecting gear frame to rotate around the axis of the power input shaft through the wheel and axle; the connecting gear frame is used to drive the power output shaft to rotate when rotating.
[0013] In some embodiments, the number of planetary gears is two or more, and they are evenly distributed circumferentially around the axis of the power input shaft;
[0014] The movable gear frame has a first lug, the number of which is equal to the number of planetary gears. The movable gear frame is connected to the axle of each planetary gear in a one-to-one correspondence through each of the first lugs. The movable gear frame forms a first weight-reducing groove between two adjacent first lugs.
[0015] In some embodiments, the movable gear frame has a first through hole at its center for the power input shaft to pass through, and there is a first gap between the first through hole and the power input shaft.
[0016] In some embodiments, the connecting gear has a second lug, the number of which is equal to the number of the planetary gears, and the connecting gear is connected to the axle of each planetary gear in a one-to-one correspondence through each of the second lugs; wherein, the connecting gear forms a second weight-reducing groove between two adjacent second lugs.
[0017] In some embodiments, the housing is provided with a bottom cover, the bottom cover having a second through hole through which the power input shaft passes; the bottom cover having a receiving groove for accommodating the movable gear frame, the bottom cover providing support to the movable gear frame through the bottom of the receiving groove, and a second gap between the movable gear frame and the groove wall of the receiving groove.
[0018] In some embodiments, the bottom cover is a PA66 plastic bottom cover.
[0019] In some embodiments, the housing is a 6061 aluminum alloy housing.
[0020] By employing the above technical solution, the lightweight gearbox for UAVs of this utility model has at least the following beneficial effects:
[0021] 1. By setting a first weight reduction hole on the power input shaft and a second weight reduction hole on the power output shaft, the weight of the gearbox can be greatly reduced, achieving lightweight gearbox, thereby reducing the adverse effects on the drone's load and endurance, and significantly improving the drone's endurance and effective payload utilization.
[0022] 2. By reducing the weight of the connecting gear and the movable gear, the overall weight of the gearbox can be further reduced, thereby achieving a lighter gearbox and further improving the drone's endurance and payload utilization.
[0023] 3. The bottom cover is made of PA66 plastic, and the casing is made of 6061 aluminum alloy, which ensures strength while achieving a lightweight design.
[0024] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0026] Figure 1 This is a perspective view of a lightweight gearbox for a drone provided in one embodiment of the present invention;
[0027] Figure 2 This is a cross-sectional view of the lightweight gearbox for unmanned aerial vehicles according to this utility model;
[0028] Figure 3 This is an assembly diagram of the bottom cover and the movable gear frame;
[0029] Figure 4 This is a schematic diagram of the assembly of the planetary gear and the power output shaft.
[0030] Reference numerals: 1. Housing; 2. Power input shaft; 3. Power output shaft; 4. Drive gear; 5. Planetary gear; 6. Movable gear frame; 7. Bottom cover; 8. Internal gear ring; 21. First weight reduction hole; 22. Flange; 23. Second clearance; 31. Second weight reduction hole; 32. Connecting gear frame; 33. Second lug; 51. Axle; 61. First lug; 71. Receiving groove; 72. Second through hole; 301. Second weight reduction groove; 601. First weight reduction groove; 602. First clearance; 603. First through hole. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0034] like Figure 1-4As shown, one embodiment of this utility model discloses a lightweight gearbox for a drone, comprising a housing 1. The housing 1 is used to fix itself to the drone's body, for example, by means of screws. A reduction mechanism is provided inside the housing 1, and a power input shaft 2 is provided at one end of the housing 1. The power input shaft 2 is used to connect to the output end of a motor. A power output shaft 3 is provided at the other end of the housing 1. The axes of the power input shaft 2 and the power output shaft 3 coincide. The power output shaft 3 is used to connect to a rotating part on the drone's body, for example, by means of a snap-fit connection. The power input shaft 2 is connected to the power output shaft 3 through the reduction mechanism. The power input shaft 2 rotates under the drive of the motor's output end, thereby driving the power output shaft 3 to rotate through the reduction mechanism, causing the power output shaft 3 to drive the rotating part on the drone's body to rotate together.
[0035] The power input shaft 2 is provided with a first weight reduction hole 21, and the power output shaft 3 is provided with a second weight reduction hole 31.
[0036] In the above example, by setting a first weight reduction hole 21 on the power input shaft 2 and a second weight reduction hole 31 on the power output shaft 3, the weight of the gearbox can be greatly reduced, achieving lightweight gearbox, thereby reducing the adverse effects on the drone's load and endurance, and significantly improving the drone's endurance and effective payload utilization.
[0037] In some implementations, such as Figure 2 As shown, the aforementioned first weight-reducing hole 21 is a blind hole. The aforementioned first weight-reducing hole 21 can pass through one end of the power input shaft 2 away from the reduction mechanism. The end of the power input shaft 2 away from the reduction mechanism is provided with a flange 22 for connection to the output end of the motor.
[0038] In the above example, since the end of the power input shaft 2 closest to the reduction mechanism needs to be connected to the reduction mechanism and requires greater strength, the first weight-reducing hole 21 does not penetrate through this end of the power input shaft 2. However, since the end of the power input shaft 2 away from the reduction mechanism has a flange 22, the structural strength of this end is greater, allowing the first weight-reducing hole 21 to penetrate through this end. This achieves weight reduction without affecting the connection between this end of the power input shaft 2 and the output end of the motor.
[0039] In some implementations, such as Figure 2 As shown, the second weight reduction hole 31 is a blind hole, and the second weight reduction hole 31 penetrates the end of the power output shaft 3 near the reduction mechanism. In this way, while achieving weight reduction, the impact on the structural strength of the output end of the power output shaft 3 is reduced.
[0040] To achieve the function of the aforementioned deceleration mechanism, in some embodiments, such as Figure 2As shown, an internal gear ring 8 is fixed on the aforementioned housing 1, and the aforementioned reduction mechanism includes a drive gear 4 and a planetary gear 5. The drive gear 4 is fixed on the power input shaft 2, for example, the drive gear 4 can be sleeved on the power input shaft 2, thus realizing the connection between the aforementioned reduction mechanism and the power input shaft 2. The planetary gear 5 meshes between the transmission teeth of the internal gear ring 8 and the drive gear 4. The aforementioned housing 1 is also provided with a movable gear frame 6. A connecting gear frame 32 is fixed on the power output shaft 3. One end of the planetary gear shaft 51 is rotatably mounted on the movable gear frame 6. The other end of the planetary gear shaft 51 is rotatably mounted on the connecting gear frame 32 to realize the connection between the reduction mechanism and the power output shaft 3. Among them, the drive gear 4 of the reduction mechanism is used to rotate under the drive of the power input shaft 2 to drive the planetary gear 5 to revolve around the axis of the power input shaft 2, so that the planetary gear 5 drives the movable gear frame 6 and the connecting gear frame 32 to rotate around the axis of the power input shaft 2 through the shaft 51. The connecting gear frame 32 is used to drive the power output shaft 3 to rotate when it rotates.
[0041] In the example above, when the power input shaft 2 drives the drive gear 4 to rotate, the planetary gear 5 rotates on its own axis and revolves around the axis of the drive gear 4 under the action of the drive gear 4 and the internal gear ring 8. When the planetary gear 5 revolves, it drives the connecting gear frame 32 to rotate, which in turn drives the power output shaft 3 to rotate, thus realizing the function of the aforementioned reduction mechanism.
[0042] In some implementations, such as Figure 3 As shown, the aforementioned planetary gears 5 can be two or more, and are evenly distributed circumferentially around the axis of the power input shaft 2. The aforementioned movable gear carrier 6 has first lugs 61, and the number of first lugs 61 is equal to the number of planetary gears 5. The movable gear carrier 6 is connected to the axle 51 of each planetary gear in a one-to-one correspondence through each first lug 61. Among them, the movable gear carrier 6 forms a first weight-reducing groove 601 between two adjacent first lugs 61.
[0043] In the above example, by forming a first weight-reducing groove 601 between two adjacent first lugs 61, the weight of the movable gear frame 6 can be reduced, thereby further reducing the overall weight of the gearbox and further achieving the lightweighting of the gearbox, so as to further improve the drone's endurance and payload utilization.
[0044] In some implementations, such as Figure 3 As shown, the aforementioned movable gear 6 has a first through hole 603 at its center for the power input shaft 2 to pass through, and there is a first gap 602 between the first through hole 603 and the power input shaft 2.
[0045] In the above example, by designing a first gap 602 between the first through hole 603 and the power input shaft 2, the first gap 602 can be designed to be larger, so as to further reduce the weight of the movable gear 6, thereby further reducing the overall weight of the gearbox, further achieving the lightweighting of the gearbox, and further improving the drone's endurance and payload utilization.
[0046] In some implementations, such as Figure 4 As shown, the aforementioned connecting gear 32 may have second lugs 33, the number of which is equal to the number of planetary gears 5. The connecting gear 32 is connected to the axle 51 of each planetary gear in a one-to-one correspondence via each second lug 33. A second weight-reducing groove 301 is formed between adjacent second lugs 33 in the connecting gear 32.
[0047] In the above example, by forming a second weight-reducing groove 301 between two adjacent second lugs 33, the weight of the connecting gear frame 32 can be reduced, thereby further reducing the overall weight of the gearbox and further achieving the lightweighting of the gearbox, so as to further improve the drone's endurance and payload utilization.
[0048] In some implementations, such as Figure 3 As shown, the aforementioned housing 1 is provided with a bottom cover 7, which has a second through hole 72 through which the power input shaft 2 passes. The bottom cover 7 is provided with a receiving groove 71 for accommodating the aforementioned movable gear 6. The bottom cover 7 provides support for the movable gear 6 through the bottom surface of the receiving groove 71, and there is a second gap 23 between the movable gear 6 and the groove wall of the receiving groove 71.
[0049] In the above example, the bottom cover 7 provides support for the movable gear 6 through the bottom surface of the receiving groove 71, allowing the movable gear 6 to rotate stably on the bottom surface of the receiving groove 71. By creating a second gap 23 between the movable gear 6 and the groove wall of the receiving groove 71, compared to a design where the movable gear 6 is tightly attached to the groove wall of the receiving groove 71, the size of the movable gear 6 can be designed to be smaller, further reducing its weight. This, in turn, further reduces the overall weight of the gearbox, achieving a lighter gearbox and further improving the drone's endurance and payload utilization.
[0050] In some embodiments, the aforementioned bottom cover 7 can be a PA66 plastic bottom cover. The aforementioned housing 1 can be a 6061 aluminum alloy housing, thus achieving a lightweight design while ensuring strength.
[0051] Among them, 6061 aluminum alloy material has both "high strength" and "low density" characteristics, making it one of the best materials for lightweight load-bearing structures.
[0052] Actual testing and verification: An "actual weighing + hoisting test" was conducted. Compared with traditional gearboxes: the weight of this new type of gearbox is reduced by more than 30%, and the hoisting process is stable and reliable; the drone's endurance is increased by approximately 20% (adjusted based on actual test data).
[0053] By implementing the above-mentioned optimal method, the weight reduction of the gearbox can be maximized while ensuring the reliability of UAV hoisting operations, thus fully leveraging the UAV's load and endurance potential.
[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A lightweight gearbox for unmanned aerial vehicles (UAVs), characterized in that, The device includes a housing (1) for fixing to the body of a drone. A reduction gear is provided inside the housing (1). One end of the housing (1) has a power input shaft (2) for connecting to the output end of a motor. The other end of the housing (1) has a power output shaft (3) for connecting to a rotating part on the drone body. The power input shaft (2) is connected to the power output shaft (3) via the reduction gear. The power input shaft (2) rotates under the drive of the motor's output end, thereby driving the power output shaft (3) to rotate via the reduction gear, causing the power output shaft (3) to drive the rotating part on the drone body to rotate together. The power input shaft (2) is provided with a first weight reduction hole (21), and the power output shaft (3) is provided with a second weight reduction hole (31).
2. The lightweight gearbox for UAVs as described in claim 1, characterized in that, The first weight reduction hole (21) is a blind hole. The first weight reduction hole (21) passes through the end of the power input shaft (2) away from the reduction mechanism. The end of the power input shaft (2) away from the reduction mechanism is provided with a flange (22) so as to connect to the output end of the motor through the flange (22). And / or, the second weight reduction hole (31) is a blind hole, and the second weight reduction hole (31) passes through the end of the power output shaft (3) near the reduction mechanism.
3. The lightweight gearbox for UAVs as described in claim 1, characterized in that, An internal gear ring (8) is fixed on the housing (1). The reduction mechanism includes a drive gear (4) and a planetary gear (5). The drive gear (4) is fixed on the power input shaft (2) to realize the connection between the reduction mechanism and the power input shaft (2). The planetary gear (5) meshes between the transmission teeth of the internal gear ring (8) and the driving gear (4). The housing (1) is also provided with a movable gear frame (6). A connecting gear frame (32) is fixed on the power output shaft (3). One end of the axle (51) of the planetary gear is rotatably mounted on the movable gear frame (6). The other end of the axle (51) of the planetary gear is rotatably mounted on the connecting gear frame (32) to realize the connection between the reduction mechanism and the power output shaft (3). The driving gear (4) of the reduction mechanism is used to rotate under the drive of the power input shaft (2) to drive the planetary gear (5) to revolve around the axis of the power input shaft (2), so that the planetary gear (5) drives the movable gear frame (6) and the connecting gear frame (32) to rotate around the axis of the power input shaft (2) through the wheel axle (51); the connecting gear frame (32) is used to drive the power output shaft (3) to rotate when rotating.
4. The lightweight gearbox for UAVs as described in claim 3, characterized in that, The number of planetary gears (5) is two or more, and they are evenly distributed around the axis of the power input shaft (2). The movable gear frame (6) has a first lug (61), the number of which is equal to the number of planetary gears (5). The movable gear frame (6) is connected one-to-one with the axle (51) of each planetary gear through each of the first lugs (61). The movable gear frame (6) forms a first weight-reducing groove (601) between two adjacent first lugs (61).
5. The lightweight gearbox for UAVs as described in claim 3 or 4, characterized in that, The movable gear frame (6) has a first through hole (603) at its center for the power input shaft (2) to pass through, and there is a first gap (602) between the first through hole (603) and the power input shaft (2).
6. The lightweight gearbox for UAVs as described in claim 3 or 4, characterized in that, The connecting gear frame (32) has a second lug (33), the number of which is equal to the number of the planetary gears (5). The connecting gear frame (32) is connected to the axle (51) of each planetary gear through each second lug (33). The connecting gear frame (32) forms a second weight-reducing groove (301) between two adjacent second lugs (33).
7. The lightweight gearbox for UAVs as described in claim 3 or 4, characterized in that, The housing (1) is provided with a bottom cover (7), and the bottom cover (7) is provided with a second through hole (72) through which the power input shaft (2) passes; the bottom cover (7) is provided with a receiving groove (71) for accommodating the movable gear frame (6), and the bottom cover (7) provides support to the movable gear frame (6) through the bottom surface of the receiving groove (71), and there is a second gap (23) between the movable gear frame (6) and the groove wall of the receiving groove (71).
8. The lightweight gearbox for UAVs as described in claim 7, characterized in that, The bottom cover (7) is a PA66 plastic bottom cover.
9. The lightweight gearbox for UAVs as described in any one of claims 1-4 and 8, characterized in that, The casing (1) is a 6061 aluminum alloy casing.