Blade static balance detection device and detection system thereof

Abstract

The embodiment of the utility model relates to the technical field of unmanned aerial vehicles, and particularly discloses a blade static balance detection device and a detection system thereof, the blade static balance detection device comprises a casing, the casing is provided with an installation platform and an installation support extending along the vertical direction from the installation platform; the rotating assembly is arranged on the mounting bracket and comprises a rotating seat, the first paddle is mounted at one end of the rotating seat, the second paddle is mounted at the other end of the rotating seat, and the distance between the tail end of the first paddle and the rotating center of the rotating seat is r; the electronic scale is located below the tail end of the first paddle, when the weight of the first paddle is equal to that of the second paddle, the rotating seat and the mounting platform are in a parallel state, when the weight of the first paddle is larger than that of the second paddle, the tail end of the first paddle abuts against the electronic scale to obtain weight G, and the included angle between the first paddle and the horizontal direction is theta, and the unbalance U of the first paddle and the second paddle is equal to G * r * cos theta. By means of the mode, the static balance detection efficiency can be improved by the embodiment of the utility model.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a blade static balance detection device and a detection system thereof. Background Art

[0002] The imbalance of the rotor is the main source of vibration for rotor-type vertical takeoff and landing aircraft such as helicopters and multi-rotor aircraft. The rotor is usually composed of multiple blades. To ensure that the blades are in a balanced state, it is usually necessary to perform static balance detection on each blade before installing the blades. In the related art, most of the static balance analysis of the blades is carried out under static conditions, and the work of weighing and measuring the center of gravity of the blades is carried out. When weighing the blades, it is necessary to weigh the weights of each blade.

[0003] The inventor of the present utility model found in the process of implementing the present utility model that the static balance detection efficiency of the blade still needs to be improved. Summary of the Utility Model

[0004] In view of the above problems, the embodiments of the present utility model provide a blade static balance detection device and a detection system thereof, which overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of the present utility model, a blade static balance detection device is provided, including a housing, an installation platform is arranged on the housing, and an installation bracket extending vertically from the installation platform; a rotating assembly is arranged on the installation bracket, the rotating assembly includes a rotating seat, the rotating seat can rotate relative to the housing, a first blade is installed at one end of the rotating seat, a second blade is installed at the other end of the rotating seat, and the distance from the tail end of the first blade to the rotation center of the rotating seat is r; an electronic scale is arranged on the installation platform, and the electronic scale is located below the tail end of the first blade; wherein, when the weight of the first blade is equal to the weight of the second blade, the rotating seat is in a parallel state with the installation platform, when the weight of the first blade is greater than the weight of the second blade, the tail end of the first blade abuts against the electronic scale to obtain a weight G, the included angle between the first blade and the horizontal direction is θ, and the imbalance amount U of the first blade and the second blade is U = G×r×cosθ.

[0006] In an alternative embodiment, the mounting bracket includes a first bracket and a second bracket, which are spaced apart along a second direction; a central through-hole is provided on the rotating seat, the axial direction of the central through-hole is along the second direction, and the second direction is perpendicular to the vertical direction; the rotating assembly includes a mounting shaft, the mounting shaft is inserted into the central through-hole, one end of the mounting shaft is connected to the first bracket, the other end of the mounting shaft is connected to the second bracket, and the mounting shaft is coaxially arranged with the central through-hole.

[0007] In an alternative embodiment, the rotating assembly further includes a bearing, the bearing is sleeved on the mounting shaft, and at least part of the bearing is installed in the central through-hole.

[0008] In an alternative embodiment, a first mounting groove is provided at one end of the rotating seat, a second mounting groove is provided at the other end of the rotating seat, at least part of the top end of the first blade is installed in the first mounting groove, and at least part of the top end of the second blade is installed in the second mounting groove.

[0009] In an alternative embodiment, a third mounting groove is provided at one end of the rotating seat, the third mounting groove is spaced apart from the first mounting groove along the second direction, and the groove shape of the third mounting groove is different from that of the first mounting groove; a fourth mounting groove is provided at the other end of the rotating seat, the fourth mounting groove is spaced apart from the second mounting groove along the second direction, and the groove shape of the fourth mounting groove is different from that of the second mounting groove.

[0010] In an alternative embodiment, a first connecting block is further provided at one end of the rotating seat, the first connecting block is located between the first mounting groove and the third mounting groove, and the top end of the first blade is detachably connected to the first connecting block; a second connecting block is further provided at the other end of the rotating seat, the second connecting block is located between the second mounting groove and the fourth mounting groove, and the top end of the second blade is detachably connected to the second connecting block.

[0011] In an alternative embodiment, there is a clearance space between the first bracket and the second bracket along the second direction, and part of the first blade or part of the second blade is located in the clearance space.

[0012] In an alternative embodiment, a plurality of rollers are further provided on the housing, the plurality of rollers are installed at the bottom end of the housing, and the rollers can drive the housing to move.

[0013] In an alternative manner, the blade static balance detection device further includes a control component, which is electrically connected to the electronic scale. The control component includes a display screen, and the display screen can display the imbalance amounts of the first blade and the second blade.

[0014] According to another aspect of the present utility model, there is provided a static balance detection system, including the blade static balance detection device as described above.

[0015] The beneficial effects of the embodiments of the present utility model are as follows: Different from the prior art, the embodiments of the present utility model are provided with a housing, a rotating component, and an electronic scale. Among them, an installation platform and an installation bracket extending vertically from the installation platform are provided on the housing. The rotating component is arranged on the installation bracket. The rotating component includes a rotating seat, and the rotating seat can rotate relative to the housing. The first blade is installed at one end of the rotating seat, and the second blade is installed at the other end of the rotating seat. The distance from the tail end of the first blade to the rotation center of the rotating seat is r. The electronic scale is arranged on the installation platform and is located below the tail end of the first blade. With such a setting, the user only needs to install the first blade and the second blade on the rotating seat. Under the self-weight of the first blade and the second blade, when the weight of the first blade is equal to the weight of the second blade, the rotating seat is in a parallel state with the installation platform. When the weight of the first blade is greater than the weight of the second blade, the first blade drives the rotating seat to rotate, and the tail end of the first blade abuts against the electronic scale to obtain the weight G. The angle between the first blade and the horizontal direction is θ. The imbalance amount U of the first blade and the second blade is U = G × r × cosθ. Compared with the prior art in which the weights of each blade need to be weighed to calculate the imbalance amount between each blade, the technical solution in this application does not need to weigh the weights of each blade, is more convenient, and can improve the efficiency of blade static balance detection. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0017] Figure 1 It is a partial structural schematic diagram of the blade static balance detection device according to the embodiment of the present utility model;

[0018] Figure 2 It is a partial structural exploded view of the blade static balance detection device according to the embodiment of the present utility model at an angle;

[0019] Figure 3 It is another perspective schematic diagram of the partial structural decomposition of the blade static balance detection device according to the embodiment of the present utility model. Detailed implementation manners

[0020] To facilitate the understanding of the present utility model, the present utility model will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0022] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] It should be noted that: The embodiments of the present application are applied to the blades of the upper rotor of an unmanned aerial vehicle. The rotor includes a first blade 100 and a second blade 200. It can be understood that the embodiments of the present application can also be applied to the blades on other devices, such as: propeller blades, wind turbine blades, and the like.

[0024] Please refer to Figure 1 , the blade static balance detection device 1000 includes a housing 10, a rotating assembly 20, an electronic scale 30, and a control assembly (not shown in the figure). Among them, the rotating assembly 20 and the electronic scale 30 are both arranged on the housing 10, the first blade 100 and the second blade 200 are both installed on the rotating assembly 20, and the control assembly is electrically connected to the electronic scale 30. The following is a specific description of the housing 10, the rotating assembly 20, the electronic scale 30, and the control assembly.

[0025] For the above-mentioned housing 10 and rotating assembly 20, as Figures 1-3As shown, an installation platform 101 and an installation bracket 102 extending vertically from the installation platform 101 are provided on the casing 10. The installation platform 101 can be used to install the above-mentioned electronic scale 30, and the installation bracket 102 can be used to install the above-mentioned rotating assembly 20.

[0026] Specifically, the rotating assembly 20 includes a rotating seat 201, a mounting shaft 202, and a bearing 203. Both ends of the mounting shaft 202 are provided on the installation bracket 102. The bearing 203 is sleeved on the mounting shaft 202. The outer ring of the bearing 203 is connected to the rotating seat 201. The rotating seat 201 can rotate relative to the mounting shaft 202. Moreover, the rotating seat 201 can rotate relative to the casing 10. The first paddle 100 is installed at one end of the rotating seat 201, and the second paddle 200 is installed at the other end of the rotating seat 201. The distance from the tail end of the first paddle 100 to the rotation center of the rotating seat 201 is r. Since the rotating seat 201 can rotate around the mounting shaft 202, the rotation center of the rotating seat 201 refers to the axis of the mounting shaft 202.

[0027] In some embodiments, a central through hole 201a is provided on the rotating seat 201. The axial direction of the central through hole 201a is along a second direction, and the second direction is perpendicular to the vertical direction. The mounting shaft 202 is inserted into the central through hole 201a, and the bearing 203 is at least partially installed in the central through hole 201a. The central through hole 201a is used to install the mounting shaft 202 and the bearing 203 to enable the rotating seat 201 to rotate relative to the mounting shaft 202. Optionally, the mounting shaft 202 and the central through hole 201a are coaxially arranged.

[0028] In some embodiments, a first installation groove 2011 is provided at one end of the rotating seat 201, and a second installation groove 2012 is provided at the other end of the rotating seat 201. At least a part of the top end of the first paddle 100 is installed in the first installation groove 2011, and at least a part of the top end of the second paddle 200 is installed in the second installation groove 2012. The first installation groove 2011 is used for the top end of the first paddle 100 to be installed to limit the first paddle 100 at one end of the rotating seat 201, and the second installation groove 2012 is used for the top end of the second paddle 200 to be installed to limit the second paddle 200 at the other end of the rotating seat 201.

[0029] In some embodiments, a third mounting groove 2013 is provided at one end of the rotating seat 201. The third mounting groove 2013 and the first mounting groove 2011 are spaced apart in the second direction, and the groove shape of the third mounting groove 2013 is different from that of the first mounting groove 2011. Since the top ends of the first blades 100 have different shapes, such as cuboids, cubes, cylinders, etc., the user can install the top ends of the first blades 100 into the first mounting groove 2011 or the third mounting groove 2013 according to actual needs. Herein, the different groove shapes refer to the overall shapes of the mounting grooves being different. To adapt to the installation of the top ends of different blades, the groove shapes of the mounting grooves can be cuboids, cylinders, etc.

[0030] In some embodiments, a fourth mounting groove 2014 is provided at the other end of the rotating seat 201. The fourth mounting groove 2014 and the second mounting groove 2012 are spaced apart in the second direction, and the groove shape of the fourth mounting groove 2014 is different from that of the second mounting groove 2012. Similarly, since the top ends of the second blades 200 have different shapes, the fourth mounting groove 2014 can be used to install the top ends of the second blades 200 with different shapes.

[0031] In some embodiments, to fix the first blade 100 to the rotating seat 201, a first connecting block 2015 is further provided at one end of the rotating seat 201. The first connecting block 2015 is located between the first mounting groove 2011 and the third mounting groove 2013, and the top end of the first blade 100 is detachably connected to the first connecting block 2015. It can be understood that the detachable connection manner between the first blade 100 and the first connecting block 2015 includes but is not limited to magnetic connection, screw connection, snap connection, etc.

[0032] In some embodiments, to fix the second blade 200 to the rotating seat 201, a second connecting block 2016 is further provided at the other end of the rotating seat 201. The second connecting block 2016 is located between the second mounting groove 2012 and the fourth mounting groove 2014, and the top end of the second blade 200 is detachably connected to the second connecting block 2016. It can be understood that the detachable connection manner between the second blade 200 and the second connecting block 2016 includes but is not limited to magnetic connection, screw connection, snap connection, etc.

[0033] In some embodiments, the mounting bracket 102 includes a first bracket 1021 and a second bracket 1022. The first bracket 1021 and the second bracket 1022 are spaced apart along a second direction. The first bracket 1021 and the second bracket 1022 are used to connect two ends of the mounting shaft 202. Among them, one end of the mounting shaft 202 is connected to the first bracket 1021, and the other end of the mounting shaft 202 is connected to the second bracket 1022, so as to fix the mounting shaft 202 to the housing 10. It can be understood that the connection manner between the mounting shaft 202 and the mounting bracket 102 includes but is not limited to welding, screwing, riveting, clamping, etc.

[0034] In some embodiments, there is an avoidance space 102a between the first bracket 1021 and the second bracket along the second direction. A part of the first blade 100 or a part of the second blade 200 is located in the avoidance space 102a. The avoidance space 102a can provide a certain avoidance space 102a for the rotation of the first blade 100 or the second blade 200.

[0035] In some embodiments, a plurality of rollers 103 are further provided on the housing 10. The plurality of rollers 103 are installed at the bottom end of the housing 10, and the rollers 103 can drive the housing 10 to move.

[0036] For the above electronic scale 30 and control component, as Figures 1-3 shown, the control component is electrically connected to the electronic scale 30. The electronic scale 30 is disposed on the mounting platform 101, and the electronic scale 30 is located below the tail end of the first blade 100. When the weight of the first blade 100 is equal to the weight of the second blade 200, the rotating seat 201 is in a parallel state with the mounting platform 101. When the weight of the first blade 100 is greater than the weight of the second blade 200, the tail end of the first blade 100 abuts against the electronic scale 30 to obtain a weight G. The angle between the first blade 100 and the horizontal direction is θ, and the unbalance amount U of the first blade 100 and the second blade 200 = G×r×cosθ.

[0037] It should be noted that: Since the weight of the first blade 100 is greater than the weight of the second blade 200, the first blade 100 drives the rotating seat 201 to rotate until the first blade 100 abuts against the electronic scale 30. At this time, the first blade 100 is in an inclined state, and the angle between the first blade 100 and the horizontal direction is θ. According to the weighing of the electronic scale 30, the mass of the unbalance between the first blade 100 and the second blade 200 can be obtained. Then, according to the relevant torque formula, by multiplying the force by the length of the force arm (i.e., the horizontal distance from the end of the first blade 100 to the rotation center of the rotating seat 201), and through simple conversion, the unbalance between the first blade 100 and the second blade 200 can be obtained.

[0038] In some embodiments, the control component includes a display screen, and the display screen can display the unbalance between the first blade 100 and the second blade 200. The user can set it correspondingly through the program. When performing the static balance detection on the first blade 100 and the second blade 200, the unbalance between the first blade 100 and the second blade 200 can be directly and intuitively displayed through the display screen, and the static balance detection efficiency is relatively high.

[0039] It can be understood that: The number of the electronic scales 30 can be two. One electronic scale 30 is located below the end of the first blade 100, and the other electronic scale 30 is located below the end of the second blade 200. In the case where the weight of the second blade 200 is greater than the weight of the first blade 100, the other electronic scale 30 can abut against the second blade 200, and the calculation process can refer to the case of the first blade 100, which will not be elaborated here.

[0040] In the embodiment of the present utility model, a machine shell 10, a rotating assembly 20 and an electronic scale 30 are provided. Among them, an installation platform 101 and an installation bracket 102 extending vertically from the installation platform 101 are provided on the machine shell 10. The rotating assembly 20 is arranged on the installation bracket 102. The rotating assembly 20 includes a rotating seat 201 which can rotate relative to the machine shell 10. The first blade 100 is installed at one end of the rotating seat 201, and the second blade 200 is installed at the other end of the rotating seat 201. The distance from the tail end of the first blade 100 to the rotation center of the rotating seat 201 is r. The electronic scale 30 is arranged on the installation platform 101 and is located below the tail end of the first blade 100. With such a setting, the user only needs to install the first blade 100 and the second blade 200 on the rotating seat 201. Under the condition of the self-weight of the first blade 100 and the second blade 200, when the weight of the first blade 100 is equal to the weight of the second blade 200, the rotating seat 201 and the installation platform 101 are in a parallel state. When the weight of the first blade 100 is greater than the weight of the second blade 200, the first blade 100 drives the rotating seat 201 to rotate, and the tail end of the first blade 100 abuts against the electronic scale 30 to obtain the weight G. The angle between the first blade 100 and the horizontal direction is θ. The unbalance amount U of the first blade 100 and the second blade 200 = G × r × cosθ. Compared with the prior art, in which it is necessary to weigh the weights of each blade to calculate the unbalance amount between each blade, the technical solution in this application does not need to weigh the weights of each blade, is more convenient, and can improve the static balance detection efficiency of the blade.

[0041] The present utility model also provides an embodiment of a static balance detection system. The static balance detection system includes the blade static balance detection device 1000 as described above. The functions and structures of the blade static balance detection device 1000 can be referred to the above embodiments and will not be elaborated here one by one.

[0042] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A blade static balance detection device, which is applied to a first blade and a second blade, and is characterized in that Comprising: A housing, on which an installation platform and an installation bracket extending vertically from the installation platform are provided; A rotating assembly, arranged on the installation bracket, the rotating assembly includes a rotating seat, the rotating seat can rotate relative to the housing, the first blade is installed at one end of the rotating seat, the second blade is installed at the other end of the rotating seat, and the distance from the tail end of the first blade to the rotation center of the rotating seat is r; An electronic scale, arranged on the installation platform, and the electronic scale is located below the tail end of the first blade; Wherein, when the weight of the first blade is equal to the weight of the second blade, the rotating seat is in a parallel state with the installation platform. When the weight of the first blade is greater than the weight of the second blade, the tail end of the first blade abuts against the electronic scale to obtain the weight G, the included angle between the first blade and the horizontal direction is θ, and the unbalance amount U of the first blade and the second blade = G×r×cosθ.

2. The blade static balance detection device according to claim 1, characterized in that The installation bracket includes a first bracket and a second bracket, and the first bracket and the second bracket are arranged at intervals along a second direction; A central through hole is arranged on the rotating seat, the axial direction of the central through hole is along the second direction, and the second direction is perpendicular to the vertical direction; The rotating assembly includes an installation shaft, the installation shaft is inserted into the central through hole, one end of the installation shaft is connected to the first bracket, the other end of the installation shaft is connected to the second bracket, and the installation shaft is coaxially arranged with the central through hole.

3. The blade static balance detection device according to claim 2, characterized in that The rotating assembly further includes a bearing, the bearing is sleeved on the installation shaft, and at least part of the bearing is installed in the central through hole.

4. The blade static balance detection device according to claim 2, characterized in that A first installation groove is arranged at one end of the rotating seat, a second installation groove is arranged at the other end of the rotating seat, at least part of the top end of the first blade is installed in the first installation groove, and at least part of the top end of the second blade is installed in the second installation groove.

5. The blade static balance detection device according to claim 4, characterized in that A third installation groove is arranged at one end of the rotating seat, the third installation groove is arranged at an interval from the first installation groove along the second direction, and the groove type of the third installation groove is different from that of the first installation groove; A fourth installation groove is arranged at the other end of the rotating seat, the fourth installation groove is arranged at an interval from the second installation groove along the second direction, and the groove type of the fourth installation groove is different from that of the second installation groove.

6. The blade static balance detection device according to claim 5, characterized in that A first connection block is further arranged at one end of the rotating seat, the first connection block is located between the first installation groove and the third installation groove, and the top end of the first blade is detachably connected to the first connection block; A second connecting block is also provided at the other end of the rotating seat. The second connecting block is located between the second mounting groove and the fourth mounting groove. The top end of the second blade is detachably connected to the second connecting block.

7. The blade static balance detection device according to claim 2, characterized in that: An escape space is provided between the first bracket and the second along the second direction, and a portion of the first blade or a portion of the second blade is located in the escape space.

8. The blade static balance detection device according to claim 1, characterized in that: The housing is also provided with a plurality of rollers, which are installed at the bottom end of the housing, and the rollers can drive the housing to move.

9. The blade static balance detection device according to claim 1, characterized in that: The blade static balance detection device also includes a control component, which is electrically connected to the electronic scale. The control component includes a display screen, and the display screen can display the imbalance of the first blade and the second blade.

10. A static balance detection system, characterized in that, It comprises the blade static balance detection device as described in any one of claims 1-9.

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